PMA4118LSF - Ericsson, Inc.

DC/DC regulators

Input 3.0 - 3.6V

Output up to 12A/21.6W

Key Features

• Surface mountable

• Low proﬁ le, max 8.5mm (0.33 in)

• High efﬁ ciency

• Low weight

• Designed for Environment, DfE

• Lead-free / Bromine-free

• Robust design

PMA 4000 Series

The PMA series of DC/DC regulators (POL) are

intended to be used as local distributed power sources

in distributed power architecture level 4. The PMA

series use a ceramic substrate with fine-pitch compo-

nents technology and a high degree of silicon integra-

tion. Together with the electrical design using low

Rds-On MOSFET, this provides excellent thermal

management, high reliability and high efficiency. The

high efficiency makes it possible to operate over a

wide temperature range, without adding any external

heat dissipator. At forced convection cooling >1 m/s

(200 lfm), the PMA typically delivers full power up to

+80 °C ambient temperature.

The high reliability and the low profile of the PMA

series makes them particularly suited for the com-

munications equipment of today and tomorrow and

applications with board spacing down to 15 mm (0.6

in). The flat case top enables pick-and-place handling

and provides a surface for attachment to cooling sur-

faces in areas with limited air flow.

These products are manufactured using the most

advanced technologies and materials to comply with

environmental requirements. Designed to meet high

reliability requirements of systems manufacturers, the

PMA responds to world-class specifications.

Ericsson Power Modules is an ISO 9001/14001 certi-

fied supplier.

2PMA 4000 Series EN/LZT 146 012 R2A ©Ericsson Power Modules, August 2003

Characteristics Conditions min typ max Unit

VIInput voltage range 3.0 3.3 3.6 Vdc

VIoff Turn-off input voltage Ramping from higher

voltage 2.3 Vdc

VIon Turn-on input voltage Ramping from lower

voltage 2.4 Vdc

CIInput capacitance 245 µF

PIi Input idling power Io= 0 570 mW

PRC

Input stand-by power

(RC active) Non operation 15 mW

VIac Input ripple 20Hz...5MHz, Iomax 120

1) mV

Characteristics min max Unit

TCOperating Case Temperature -45 +110 ˚C

TSStorage temperature -55 +125 ˚C

VIInput voltage -0.3 +4.0 Vdc

RC Low level -0.3 0.3 Vdc

Select Low level, positive logic -0.3 0.3 Vdc

Sync in High level, pulse voltage TBD TBD Vdc

Sync out High level, pulse voltage TBD TBD Vdc

Sync out Pulse time TBD TBD µs

Input

Note:

Stress in excess of Absolute Maximum Ratings may cause permanent damage. Absolute Maximum Ratings, sometimes referred to as

no destruction limits, are normally tested with one parameter at a time exceeding the limits of Output data or Electrical Characteristics. If

exposed to stress above these limits, function and performance may degrade in an unspeciﬁ ed manner.

Absolute Maximum Ratings

Characteristics

Random Vibration IEC 68-2-34Ed

Frequency

Acceleration density

10 ... 500 Hz

0.5 g2/Hz

Vibration

(Sinusoidal) IEC 68-2-6 Fc

Frequency range

Acceleration amplitude

Number of cycles

10 ... 500 Hz

10 g or displacement

amplitude 0.75 mm

10 in each axis

Mechanical shock

(half sinus) IEC 68-2-27 Ea

Peak acceleration

Duration

200 g

3 ms

Temperature

cycling IEC 68-2-14 Na

Temperature

Number of cycles

-40 ... +125 ˚C

500

Accelerated damp

heat

IEC 68-2-3 Ca

with bias

Temperature

Humidity

Duration

+85 ˚C

85 % RH

1000 hours

Solderability IEC 68-2-54

Solde immersion depth

Time for onset of wetting

Wetting force

2 mm

< 2.5 s

> 200 mN/m

Resistance to

cleaning solvents

Moulded package

Laser marking Fluid All commercially avail-

able

Cold (in operation) IEC 68-2-1, test AaTemperature -45 ˚C

Storage IEC 68-2-2 BaTemperature

Duration

+125 ˚C

1000 h

Environmental Characteristics

Safety

The PMA 4000 series DC/DC regulators

are designed in accordance with safety

standards IEC/EN/UL 60 950, Safety of

Information Technology Equipment.

The DC/DC regulator should be installed

in the end-use equipment, in accordance

with the requirements of the ultimate

application. The input source must be

isolated by minimum Reinforced or

Double insulation from the primary

circuit in accordance with IEC/EN/UL

60 950. If the input voltage to the DC/

DC regulator is SELV (Safety Extra Low

Voltage) then the output remains SELV

under normal and abnormal operating

conditions.

It is recommended that a slow blow fuse

with a rating of 25A be used at the input

of each DC/DC regulator. If a fault occurs

in the regulator that imposes a short

circuit on the input source, this fuse will

provide the following functions:

• Isolate the faulty DC/DC regulator

from the input power source not to

affect the operation of other parts of

the system.

• Protect the distribution wiring from

excessive current and power loss thus

preventing hazardous overheating.

The ﬂ ammability rating for all

construction parts of the DC/DC

regulator meets UL 94V-0.

TC = -30˚C...+90˚C, VI = 3.0...3.6V unless otherwise speciﬁ ed

Typ values speciﬁ ed at: TC = +25˚C, VInom. VInom = 3.3V, Iomax = 12A

1) Measured with L = 1.6 µH and 10 µF at the input.

PMA 4000 Series EN/LZT 146 012 R2A ©Ericsson Power Modules, August 2003

Connections Fundamental Circuit Diagram

Weight

PMA 4000 SF 12g

Case

Material: Semiconductor grade epoxy.

Coefﬁ cient of thermal expansion (CTE)

is typ. 10 ppm/˚C

Mechanical Data

Pin Designation Function

1-2 + Out Output voltage

3-4 Gnd Ground

5-6 + In Input voltage

7* Sync in No function, released in next rev.

8* Sync sel No function, released in next rev.

9* Sync out No function, released in next rev.

10 RC Remote control, To turn-on and turn-

off the regulator

11 Select Select pin for pos/neg logic

12 Vadj Output voltage adjust

13 +Sense Remote sensing

14 NC Not connected

Tolerances unless specified

±0,25 [±0.01]

Pin true position within

0,25 [0.01] with reference

to package center.

Coplanarity 0,1 [0.004] max

Standoff 0,3 ±0,1 [0.012 ±0.004]

Lead thickness 0,3 [0.012]

Recommended layout pattern

(component side footprint)

( 2,5 [0.1] )

30,4 [1.20]

28,7 [1.13]

18,9 [0.75]

17,2 [0.68]

20 [0.79]

35,2 ±0,5 [1.39 ±0.02]

1,5 [0.059] (6x)

2,1 [0.083] (6x)

8,35 ±0,1

[0.334 ±0.004]

1,8 [0.071]

0,7 [0.027] (4x)

1,2 [0.047] (8x)

1 [0.039] (7x)

3°

7°

12,3 [0.484]

2,8 [0.110] (4x)

2,2 [0.087] (7x)

7,7 [0.303]

7,55 [0.297]

2 [0.079] (6x)

32,5 [1.28]

3,5 [0.138] (14x)

1,7 [0.067] (8x)

dimensions in mm [in]

* Do not connect

Pins

Material: Copper

Plating: ﬁ rst plating Nickel (Ni)

second plating (outer) Palladium (Pd)

Sync out

block

GND

IN OUT

+SENSE

Sync out

Vadj

PWM

controller

Ref

GND

Error

amplifier

Sync in

RC Sel GND

Sync

Block

GND

Sync in

block

Sync sel

4PMA 4000 Series EN/LZT 146 012 R2A ©Ericsson Power Modules, August 2003

Characteristics Conditions

Output Unit

min typ max

VOi

Output voltage initial setting

and accuracy TC = +25°C, VInom, IOmax 1.18 1.20 1.22 V

Output adjust range TC = +25°C, VInom, IOmax 1.08 1.32 V

Output voltage tolerance band IO = 0.1...1.0 x IOmax, VI = 3.0...3.6V 1.164 1.236 V

Idling voltage IO = 0 1.17 1.23 V

Line regulation VImin ... VImax, IOmax 1 mV

Load regulation IO = 0.01...1.0 x IOmax, VInom 4 mV

Vtr Load transient

voltage deviation Load step = 0.25 ... 0.75 x IOmax 75 mV

ttr Load transient recovery time Load step = 0.25 ... 0.75 x IOmax 23 µs

Tcoeff Temperature coefﬁ cient TC = 40 ... 90°C, IOmax -0.1 0 +0.1 mV/°C

trRamp-up time 0.1...0.9 x VO, IO = 0.1 ...1.0 x IOmax, VInom 5.9 ms

tsStart-up time From VI connected to VO = 0.9 x VOI,

IO = 0.1 ...1.0 x IOmax, VInom 8.3 ms

tRC RC shut-down time to VO x 0.1 IO = IOmax, VInom 0.15 ms

tRC RC start-up time to VO x 0.9 IO = IOmax, VInom 6.2 ms

IOOutput current 0 12 A

POmax Max output power At VO = VOnom 14.4 W

Ilim Current limit threshold TC < TCmax 15 22 28 A

VOac Output ripple 20Hz ... 5MHz, IOmax 25 50 mVp-p

TC = –30…+90°C, VI = 3.0 ...3.6V unless otherwise speciﬁ ed.

Typ values speciﬁ ed at: TC = +25°C and VInom. VInom = 3.3V, IOmax = 12A. Note: +Sense must be connected to +Out

PMA 4118L Output

Miscellaneous

Characteristics Conditions min typ max Unit

ηEfﬁ ciency - 50% load IO = 0.5 x IOmax 89 %

ηEfﬁ ciency - 100% load IO = IOmax 82 86.5 %

PdPower Dissipation IO = IOmax 2.3 3.1 W

Fo Switching frequency IO = 0 ... 1.0 x IOmax 250 300 340 kHz

Isense Remote sense current 8mA

Static input current VI = 3.0V, IO = IOmax, TC = 25°C 5.6 A

MTBF Predicted reliability TC = 40°C10

million

hours

TC = –30…+90°C, VI = 3.0 ...3.6V unless otherwise speciﬁ ed.

Typ values speciﬁ ed at: TC = +25°C and VInom. VInom = 3.3V, IOmax = 12A. Note: +Sense must be connected to +Out

PMA 4000 Series EN/LZT 146 012 R2A ©Ericsson Power Modules, August 2003

Efﬁ ciency

Output Characteristic

Output Current Derating

Power Dissipation

PMA 4118L Typical Characteristics

Start-Up Turn-Off

Start-up at IO=12A resistive load at TC=+25 °C,

Vin=3.3 V. Start enabled by connecting Vin.

Top trace: input voltage (2 V/div.).

Bottom trace: output voltage (0.5 V/div.).

Time scale: 5 ms/div.

Output voltage vs. load current at TC=+25 °C, Vin=3.3 V.

Available load current vs. ambient air temperature and

airﬂ ow at Vin=3.3 V. See conditions on page 15.

Efﬁ ciency vs. load current and input voltage at TC=+25 °C

03691215

[

]

[%]

3.0 V

3.3 V

3.6 V

0 20406080100

[°C]

[A]

3.0 m/s (600 lfm)

1.5 m/s (300 lfm)

1.0 m/s (200 lfm)

0.5 m/s (100 lfm)

Nat. Conv.

0 3 6 9 12 15

1.10

1.15

1.20

1.25

1.30

[A]

[V]

03691215

[A]

[W]

3.0 V

3.3 V

3.6 V

Dissipated power vs. load current and input voltage at

TC=+25 °C

Turn-off at IO=12A resistive load at TC=+25 °C,

Vin=3.3 V. Turn-off enabled by disconnecting Vin.

Top trace: input voltage (2 V/div.).

Bottom trace: output voltage (0.5 V/div.).

Time scale: 0.5 ms/div.

6PMA 4000 Series EN/LZT 146 012 R2A ©Ericsson Power Modules, August 2003

Output Ripple Transient

PMA 4118L Typical Characteristics

Output voltage ripple (20mV/div.) at TC=+25 °C, Vin=3.3 V,

IO=12A resistive load.

Band width=5MHz.

Time scale: 2µs / div.

Output voltage response to load current step-change

(3-9-3 A) at TC=+25 °C, Vin=3.3 V.

Top trace: output voltage (ac) (100mV/div.).

Bottom trace: load current (dc) (5A/div.)

Time scale: 0.1 ms/div.

Output voltage vs. Output voltage adjust

resistor value.

10 15 22 33 47 68 100 150 220 470 1000

1.4

1.35

1.3

1.25

1.2

1.15

1.1

1.05

1.0

[kΩ]

[V]

VOincrease

VOdecrease

Output Voltage Adjust

The resistor value for an adjusted output voltage is

calculated by using the following equations:

Output Voltage Adjust Upwards, Increase:

Radj= 3.767/(VO-1.2)-1 [kΩ]

Output Voltage Adjust Downwards, Decrease:

Radj= (9.401(VO-0.8))/(0.8-(1.99(VO-0.8)))-1 [kΩ]

E.g. Increase to VO = 1.312 V

3.767/(1.312-1.2)-1 = 33 [kΩ]

E.g. Decrease to VO = 1.133 V

(9.401(1.133-0.8))/(0.8-(1.99(1.133-0.8)))-1 = 22 [kΩ]

PMA 4000 Series EN/LZT 146 012 R2A ©Ericsson Power Modules, August 2003

Characteristics Conditions

Output Unit

min typ max

VOi

Output voltage initial setting

and accuracy TC = +25°C, VInom, IOmax 1.48 1.50 1.52 V

Output adjust range TC = +25°C, VInom, IOmax 1.35 1.65 V

Output voltage tolerance band IO = 0.1...1.0 x IOmax, VI = 3.0...3.6V 1.455 1.545 V

Idling voltage IO = 0 1.47 1.53 V

Line regulation VImin ... VImax, IOmax 2 mV

Load regulation IO = 0.01...1.0 x IOmax, VInom 4 mV

Vtr Load transient

voltage deviation Load step = 0.25 ... 0.75 x IOmax 100 mV

ttr Load transient recovery time Load step = 0.25 ... 0.75 x IOmax 10 µs

Tcoeff Temperature coefﬁ cient TC = 40 ... 90°C, IOmax -0.1 0 +0.1 mV/°C

trRamp-up time 0.1...0.9 x VO, IO = 0.1 ...1.0 x IOmax, VInom 5.5 ms

tsStart-up time From VI connected to VO = 0.9 x VOI,

IO = 0.1 ...1.0 x IOmax, VInom 7.0 ms

tRC RC shut-down time to VO x 0.1 IO = IOmax, VInom 0.2 ms

tRC RC start-up time to VO x 0.9 IO = IOmax, VInom 8 ms

IOOutput current 0 12 A

POmax Max output power At VO = VOnom 18 W

Ilim Current limit threshold TC < TCmax 15 20 25 A

VOac Output ripple 20Hz ... 5MHz, IOmax 22 50 mVp-p

TC = –30…+90°C, VI = 3.0 ...3.6V unless otherwise speciﬁ ed.

Typ values speciﬁ ed at: TC = +25°C and VInom. VInom = 3.3V, IOmax = 12A. Note: +Sense must be connected to +Out

PMA 4118H Output

Miscellaneous

Characteristics Conditions min typ max Unit

ηEfﬁ ciency - 50% load IO = 0.5 x IOmax 91 %

ηEfﬁ ciency - 100% load IO = IOmax 85.5 88 %

PdPower Dissipation IO = IOmax 2.4 3.1 W

Fo Switching frequency IO = 0 ... 1.0 x IOmax 250 300 340 kHz

Isense Remote sense current 8mA

Static input current VI = 3.0V, IO = IOmax, TC = 25°C 6.8 A

MTBF Predicted reliability TC = 40°C10

million

hours

TC = –30…+90°C, VI = 3.0 ...3.6V unless otherwise speciﬁ ed.

Typ values speciﬁ ed at: TC = +25°C and VInom. VInom = 3.3V, IOmax = 12A. Note: +Sense must be connected to +Out

8PMA 4000 Series EN/LZT 146 012 R2A ©Ericsson Power Modules, August 2003

Efﬁ ciency

Output Characteristic

Output Current Derating

Power Dissipation

PMA 4118H Typical Characteristics

Start-Up Turn-Off

Start-up at IO=12A resistive load at TC=+25 °C,

Vin=3.3 V. Start enabled by connecting Vin.

Top trace: input voltage (2 V/div.).

Bottom trace: output voltage (0.5 V/div.).

Time scale: 5 ms/div.

Output voltage vs. load current at TC=+25 °C, Vin=3.3 V.

Available load current vs. ambient air temperature and

airﬂ ow at Vin=3.3 V. See conditions on page 15.

Efﬁ ciency vs. load current and input voltage at TC=+25 °C

03691215

[A]

[%]

3.0 V

3.3 V

3.6 V

020

40 60 80 100

[°C]

[A]

3.0 m/s (600 lfm)

1.5 m/s (300 lfm)

1.0 m/s (200 lfm)

0.5 m/s (100 lfm)

Nat. Conv.

0369

12 15

1.40

1.45

1.50

1.55

1.60

[A]

[V]

03691215

[A]

[W]

3.0 V

3.3 V

3.6 V

Dissipated power vs. load current and input voltage at

TC=+25 °C

Turn-off at IO=12A resistive load at TC=+25 °C,

Vin=3.3 V. Turn-off enabled by disconnecting Vin.

Top trace: input voltage (2 V/div.).

Bottom trace: output voltage (0.5 V/div.).

Time scale: 0.5 ms/div.

PMA 4000 Series EN/LZT 146 012 R2A ©Ericsson Power Modules, August 2003

Output Ripple Transient

PMA 4118H Typical Characteristics

Output voltage ripple (20mV/div.) at TC=+25 °C, Vin=3.3 V,

IO=12A resistive load.

Band width=5MHz.

Time scale: 2µs / div.

Output voltage response to load current step-change

(3-9-3 A) at TC=+25 °C, Vin=3.3 V.

Top trace: output voltage (ac) (100mV/div.).

Bottom trace: load current (dc) (10A/div.)

Time scale: 0.1 ms/div.

Output voltage vs. Output voltage adjust

resistor value.

15 22 33 47 68 100 150 220 470 1000

1.7

1.65

1.6

1.55

1.5

1.45

1.4

1.35

1.3

[kΩ]

[V]

VOincrease

VOdecrease

Output Voltage Adjust

The resistor value for an adjusted output voltage is

calculated by using the following equations:

Output Voltage Adjust Upwards, Increase:

Radj= 3.767/(VO-1.5)-1 [kΩ]

Output Voltage Adjust Downwards, Decrease:

Radj= (5.372(VO-0.8))/(0.8-(1.1407(VO-0.8)))-1 [kΩ]

E.g. Increase to VO = 1.612 V

3.767/(1.612-1.5)-1 = 33 [kΩ]

E.g. Decrease to VO = 1.400 V

(5.372(1.40-0.8))/(0.8-(1.1407(1.40-0.8)))-1 = 27 [kΩ]

10 PMA 4000 Series EN/LZT 146 012 R2A ©Ericsson Power Modules, August 2003

Characteristics Conditions

Output Unit

min typ max

VOi

Output voltage initial setting

and accuracy TC = +25°C, VInom, IOmax 1.78 1.80 1.82 V

Output adjust range TC = +25°C, VInom, IOmax 1.62 1.98 V

Output voltage tolerance band IO = 0.1...1.0 x IOmax, VI = 3.0...3.6V 1.746 1.854 V

Idling voltage IO = 0 1.77 1.83 V

Line regulation VImin ... VImax, IOmax 1 mV

Load regulation IO = 0.01...1.0 x IOmax, VInom 4 mV

Vtr Load transient

voltage deviation Load step = 0.25 ... 0.75 x IOmax 85 mV

ttr Load transient recovery time Load step = 0.25 ... 0.75 x IOmax 8 µs

Tcoeff Temperature coefﬁ cient TC = 40 ... 90°C, IOmax -0.1 0 +0.1 mV/°C

trRamp-up time 0.1...0.9 x VO, IO = 0.1 ...1.0 x IOmax, VInom 6.3 ms

tsStart-up time From VI connected to VO = 0.9 x VOI,

IO = 0.1 ...1.0 x IOmax, VInom 8.5 ms

tRC RC shut-down time to VO x 0.1 IO = IOmax, VInom 0.3 ms

tRC RC start-up time to VO x 0.9 IO = IOmax, VInom 7 ms

IOOutput current 0 12 A

POmax Max output power At VO = VOnom 21.6 W

Ilim Current limit threshold TC < TCmax 15 24 28 A

VOac Output ripple 20Hz ... 5MHz, IOmax 26 50 mVp-p

TC = –30…+90°C, VI = 3.0 ...3.6V unless otherwise speciﬁ ed.

Typ values speciﬁ ed at: TC = +25°C and VInom. VInom = 3.3V, IOmax = 12A. Note: +Sense must be connected to +Out

PMA 4218G Output

Miscellaneous

Characteristics Conditions min typ max Unit

ηEfﬁ ciency - 50% load IO = 0.5 x IOmax 92 %

ηEfﬁ ciency - 100% load IO = IOmax 87 89 %

PdPower Dissipation IO = IOmax 2.7 3.3 W

Fo Switching frequency IO = 0 ... 1.0 x IOmax 250 300 340 kHz

Isense Remote sense current 8mA

Static input current VI = 3.0V, IO = IOmax, TC = 25°C 8.1 A

MTBF Predicted reliability TC = 40°C10

million

hours

TC = –30…+90°C, VI = 3.0 ...3.6V unless otherwise speciﬁ ed.

Typ values speciﬁ ed at: TC = +25°C and VInom. VInom = 3.3V, IOmax = 12A. Note: +Sense must be connected to +Out

PMA 4000 Series EN/LZT 146 012 R2A ©Ericsson Power Modules, August 2003

Efﬁ ciency

Output Characteristic

Output Current Derating

Power Dissipation

PMA 4218G Typical Characteristics

Start-Up Turn-Off

Start-up at IO=12A resistive load at TC=+25 °C,

Vin=3.3 V. Start enabled by connecting Vin.

Top trace: input voltage (2 V/div.).

Bottom trace: output voltage (1 V/div.).

Time scale: 5 ms/div.

Output voltage vs. load current at TC=+25 °C, Vin=3.3 V.

Available load current vs. ambient air temperature and

airﬂ ow at Vin=3.3 V. See conditions on page 15.

Efﬁ ciency vs. load current and input voltage at TC=+25 °C

03691215

[A]

[%]

3.0 V

3.3 V

3.6 V

020

40 60 80 100

[°C]

[A]

3.0 m/s (600 lfm)

1.5 m/s (300 lfm)

1.0 m/s (200 lfm)

0.5 m/s (100 lfm)

Nat. Conv.

0 3 6 9 12 15

1.70

1.75

1.80

1.85

1.90

[A]

[V]

0 3 6 9 12 15

[A]

[W]

3.0 V

3.3 V

3.6 V

Dissipated power vs. load current and input voltage at

TC=+25 °C

Turn-off at IO=12A resistive load at TC=+25 °C,

Vin=3.3 V. Turn-off enabled by disconnecting Vin.

Top trace: input voltage (2 V/div.).

Bottom trace: output voltage (1 V/div.).

Time scale: 5 ms/div.

12 PMA 4000 Series EN/LZT 146 012 R2A ©Ericsson Power Modules, August 2003

Output Ripple Transient

PMA 4218G Typical Characteristics

Output voltage ripple (20mV/div.) at TC=+25 °C, Vin=3.3 V,

IO=12A resistive load.

Band width=5MHz.

Time scale: 2µs / div.

Output voltage response to load current step-change

(3-9-3 A) at TC=+25 °C, Vin=3.3 V.

Top trace: output voltage (ac) (100mV/div.).

Bottom trace: load current (dc) (10A/div.)

Time scale: 0.1 ms/div.

Output voltage vs. Output voltage adjust

resistor value.

18 27 39 56 82 120 180 330 560 1000

2.0

1.95

1.9

1.85

1.8

1.75

1.7

1.65

1.6

[kΩ]

[V]

VOincrease

VOdecrease

Output Voltage Adjust

The resistor value for an adjusted output voltage is

calculated by using the following equations:

Output Voltage Adjust Upwards, Increase:

Radj= 3.767/(VO-1.8)-1 [kΩ]

Output Voltage Adjust Downwards, Decrease:

Radj= (3.76(VO-0.8))/(0.8-(0.798(VO-0.8)))-1 [kΩ]

E.g. Increase to VO = 1.913 V

3.767/(1.913-1.8)-1 = 33 [kΩ]

E.g. Decrease to VO = 1.713 V

(3.76(1.713-0.8))/(0.8-(0.798(1.713-0.8)))-1 = 33 [kΩ]

PMA 4000 Series EN/LZT 146 012 R2A ©Ericsson Power Modules, August 2003

EMC Speciﬁ cation

Layout Recommendation

The radiated EMI performance of the DC/DC regulator will be

optimised by including a ground plane in the PCB area under

the DC/DC regulator. This approach will return switching

noise to ground as directly as possible, with improvements to

both emissions and susceptibility.

Operating Information

Remote Control (RC)

The PMA 4000 Series DC/DC regulators have remote control

function, with both negative and positive logic options. The

RC function is CMOS open drain compatible. Maximum sink

current is 1mA. The (RC) and (Select) pins have identical

functions meaning that the functions may be inverted. If either

one of the pins is shorted to ground the regulator is turned

off. If both pins are are shorted to ground or both pins are

disconnected the regulator is turned on.

Positive logic:

To choose positive logic, leave the Select pin open = 1.

Negative logic:

To choose negative logic, connect the Select pin to GND = 0.

With the RC pin, i.e. with a suitable open collector function,

the ON/OFF condition of the regulator may be controlled.

All PMA 4000 Series DC/DC regulators have a positive remote

sense pin that can be used to compensate for moderate amounts

of resistance in the distribution system and allow for voltage

regulation at the load or other selected point. The remote sense

line will carry very little current and does not need a large cross

sectional area. However, the sense line on the PCB should be

located close to a ground trace or ground plane. The remote

sense circuitry will compensate for up to 10% voltage drop

between the sense voltage and the voltage at the output pins

from VOnom. If the remote sense is not needed the sense pin

should be connected to +Out.

Remote Sense

RC Select Regulator condition

00ON

1 0 OFF

0 1 OFF

11 ON

0= Deﬁ ned as low voltage level, 0-0.3V

1= Deﬁ ned as high voltage level, approx. 4V, (internal level)

14 PMA 4000 Series EN/LZT 146 012 R2A ©Ericsson Power Modules, August 2003

Over Temperature Protection (OTP)

The PMA 4000 Series DC/DC regulators are protected from

thermal overload by an internal over temperature shutdown

circuit. When the case temperature (center of case ) exceeds

140 ºC the regulator will shut down immediately.

The regulator will return to normal operation when the over

temperature degrades.

Input And Output Impedance

The impedance of both the power source and the load will

interact with the impedance of the DC/DC regulator. It is

most important to have a low characteristic impedance, both

at the input and output, as the regulators have a low energy

storage capability. Use capacitors across the input if the source

inductance is greater than 4.7µH. Suitable input capacitors are

47µF-220µF low ESR ceramics.

Max output capacitance is 5000µF. The use of low ESR

capacitors is important and should be <15 mΩ.

Parallel Operation

The PMA 4000 Series DC/DC regulators can be connected in

parallel with a common input. Paralleling is accomplished by

connecting the output voltage pins directly and using a load

sharing device on the input. Layout considerations should be

made to avoid load imbalance and it is recommended not to use

more power than that of each individual regulator. For more

details on paralleling, please consult the separate Application

Note AN202A.

Maximum Capacitive Load

When powering loads with signiﬁ cant dynamic current

requirements, the voltage regulation at the load can be

improved by addition of decoupling capacitance at the load.

The most affective technique is to locate low ESR ceramic

capacitors as close to the load as possible, using several

capacitors to lower the effective ESR. These ceramic capacitors

will handle short duration high-frequency components of

dynamic load changes. In addition, higher values of capacitors

should be used to handle the mid-frequency components.

It is equally important to use good design practise when

conﬁ guring the DC distribution system.

Low resistance and low inductance PCB layouts and cabling

should be used. Remember that when using remote sensing,

all resistance, inductance and capacitance of the distribution

system is within the feedback loop of the regulator. This

can affect on the regulators compensation and the resulting

stability and dynamic response performance. The PMA 4000

series regulator can accept up to 5mF of capacitive load on the

output at full load. This gives <500µF/A of IO.

Current Limit Protection

The PMA 4000 Series DC/DC regulators include current

limiting circuitry that allows them to withstand continuous

overloads or short circuit conditions on the output. The current

limit is of hick-up mode.

The regulator will resume normal operation after removal of the

overload. The load distribution system should be designed to

carry the maximum output short circuit current specified.

Operating Information

Output Voltage Adjust (Vadj)

All PMA 4000 Series DC/DC regulators have an Output

Voltage adjust pin (Vadj). This pin can be used to adjust the

output voltage above or below Output voltage initial setting.

Note that at increased output voltages the maximum power

rating of the regulator remains the same, and the output

current capability will decrease correspondingly. To decrease the

output voltage the resistor should be connected between Vadj

pin and the VO pin. To increase the voltage the resistor should

be connected between Vadj pin and the GND pin. The resistor

value of the Output voltage adjust function is according to

information given under the output section.

Circuit conﬁ guration for output voltage adjust

+Out

GND

Vadj Load

Radj

Decrease Increase

+Out

GND

Vadj Load

Radj

Thermal Considerations

General

The PMA 4000 Series DC/DC regulators are designed

to operate in a variety of thermal environments, however

sufficient cooling should be provided to help ensure reliable

operation. Heat is removed by conduction, convection and

radiation to the surrounding environment. Increased airflow

enhances the heat transfer via convection. The available load

current vs. ambient air temperature and airflow at Vin=3.3 V

for each model is according to the information given under the

output section.

Proper cooling can be verified by measuring the temperature

on top of the case.

Calculation of ambient temperature

By using the thermal resistance the maximum allowed

ambient temperature can be calculated.

A. The powerloss is calculated by using the formula

((1/η) - 1) × output power = power losses.

η = efﬁ ciency of regulator. Example: 95% = 0.95

B. Find the value of the thermal resistance Rth C-A in the dia-

gram by using the airﬂ ow speed at the module. Take the ther-

mal resistance × powerloss to get the temperature increase.

0.0 0.5 1.0 1.5 2.0 2.5 3.0

[m/s]

[°C/W]

Rth C-A

Thermal resistance vs. airspeed measured at the regulator.

C. Max allowed calculated ambient temperature is:

Max TC of DC/DC regulator - temperature increase.

Example: PMA 4118H at 1m/s:

B. 2.45W × 11.7°C/W = 28.7°C

C.110°C - 28.7°C = max ambient temperature is 81°C

The real temperature will be dependent on several factors,

like PCB size and type, direction of airﬂ ow, air turbulence

etc. It is recommended to verify the temperature by testing.

A. ((1/0.88) - 1) × 18W = 2.45W

Top view

Reference area TC

TCmax = 110°C

Test conditions:

The test is done in a wind tunnel with a cross section of

305x305 mm, the DC/DC regulator horisontally mounted on a

2 layer PCB with a size of 230x160 mm.

Miscellaneous

The PMA 4000 series DC/DC regulators are intended for

reflow soldering processes. Extra precautions must be taken

when reflow-soldering the module. Neglecting the soldering

information provided may result in permanent damage or

significant degradation of the regulator performance. No

responsibility is assumed if these recommendations are not

strictly followed.

The regulator may be reflow soldered using vapour phase

reflow (VPR) or forced convection reflow processes. The

high thermal mass of the component and its effect on the

temperature differences (∆T) over a PCB means that particular

attention should be paid to other temperature sensitive

components.

For successful soldering of the PMA 4000 series DC/DC

regulators, both pin temperature and case temperature must be

monitored:

• Minimum temperature of the pins:

to ensure reliable solder joints

• Maximum temperature of the regulator case:

to avoid overheating

Soldering Information

Minimum temperature:

Most important is to ensure that the pins on the coldest side

reach sufﬁ cient soldering temperature for a sufﬁ cient time.

Therefore, the pin temperature measurements should be done

on both sides of the module, preferrably on the middle pins

(3/4 and 11/12).

The pins of the module are palladium plated. In order to

guarantee a reliable solder joint, a pin temperature (TP) in

excess of the solder fusing temperatue (183˚C for Sn/Pb 63/37)

for 25 seconds, and a peak temperature above 195˚C should be

reached.

Maximum temperature:

To avoid damage to the module, the reﬂ ow proﬁ le should

be optimised to avoid overheating. The case temperature

(TC) should be monitored with a thermocouple attached to

the center of the top of the case using an adhesive or heat

conductive paste.

A sufﬁ ciently extended soak time is recommended to ensure

an even temperature throughout the PCB, for both small

and large components. To reduce the risk of overheating the

module it is also recommended to minimise the time in reﬂ ow

as much as possible.

Conventional Sn-Pb convection solder process

For conventional Sn-Pb solder processes, the PMA 4000 series

regulator is qualiﬁ ed for MSL 1 according to Jedec standard

(J-STD-020b July 2002).

During reﬂ ow, the case temperature must not exceed 215˚C at

any time.

070 140 210 280 350

100

150

200

250

300

[°C]

Time

reflow ramp-

up max 3°/s cooling

max 5°/s

preheat

max 3°/s

soak zone (150°C-

180°C) 30-180s

reflow

zone

max case temperature

@ 215°C (Sn-Pb solders)

pin temperature

case temperature

Limitation of Liability

Quality

Reliability

The Mean Time Between Failure (MTBF) of the PMA 4000

series DC/DC regulator family is calculated to be greater than

(>) 10 million hours at full output power and a case temperature

of +40°C using the Ericsson failure rate data system (TILDA/

Preditool). The Ericsson failure rate data system is based on field

failure rates and is continuously updated. The data corresponds

to actual failure rates of components used in Information

Technology and Telecom equipment in temperature controlled

environments (TA= -5...+65°C). The data is considered to have

a confidence level of 90%. For more information please refer to

Design Note 002.

Quality Statement

The PMA 4000 series DC/DC regulators are designed and

manufactured in an industrial environment where quality

systems and methods like ISO 9000, 6σ (sigma), and SPC

are intensively in use to boost the continuous improvements

strategy. Conservative design rules, design reviews and product

qualiﬁ cations, plus the high competence of an engaged work

force, contribute to the high quality of our products.

Ericsson Power Modules does not make any warranties,

expressed or implied including any warranty of merchantability

or fitness for a particular purpose (including, but not limited to,

use in life support applications, where malfunctions of product

can cause injury to a person's health or life).

Delivery Package Information

PMA 4000 series is delivered in antistatic injection moulded

trays (Jedec standard) or tape & reel (EIA standard 481-2).

Tray Speciﬁ cation

Material: Polyphenylene ether (PPE)

Surface resistance: 1x105 - 9x1012 Ω/sq

Color: Black

Capacity: 30 pcs/tray

Loaded tray stacking pitch: 10.6 mm [0.417 inch]

Empty weight: 145 g

Full weight: 505 g

Miscellaneous

Notes:

- All other dimensions according to Jedec std

- Vacuum pick-up in centre of the tray

(2 cells, hatched area 43,3x54 [1.70x2.13]

92,1 [3.63] (2x)

2,7 [0.5] (2x)

43,3 [1.705] (2x)

24,65 [0.67]

27 [1.063] (9x)

36 [1.417]

322,6 ±0,25 [12.7 ±0.01]]

315 [12.4]

135,9 [5.35]

12,6 [0.496]

10,6 [0.417]

Tape & Reel Speciﬁ cation

Material: Conductive

Polystyrene (PS)

Tape width: 56 mm [2.20 inch]

Tape pitch: 32 mm [1.26 inch]

Total pocket height: 9.5 mm [0.37 inch]

Reel diameter: 330 mm [13 inch]

Reel hub diameter: 100 mm [4 inch]

Reel capacity: 150 pieces

Full reel weight: typ. 2.5 kg

2 [0.08] pitch 32 [1.26]

26,2 [1.04]

4±0,1 [0.16±0.004]

56 [2.2]

Round holes R=0,75mm

Detail1

9,15 [0.36]

0,5 [0.02]

A-A

0,2 [0.008]

Detail1

R0,75 [0.03]

Dimensions in mm [in]

Tape leader min 400 [15.7]

Tape trailer min 160 [6.3]

Feed direction

Information given in this data sheet is believed to be accurate and reliable.

No re spon si bil i ty is assumed for the con se quenc es of its use nor for any infringement

of patents or other rights of third parties which may result from its use.

No license is grant ed by implication or otherwise under any patent or patent rights of

Ericsson Power Modules. These products are sold only ac cord ing to

Ericsson Power Modules’ general conditions of sale, unless oth er wise con ﬁ rmed in

writing. Speciﬁ cations subject to change without notice.

Datasheet

The latest and most complete infor-

mation can be found on our website

Product Program

EN/LZT 146 012 R2A

VO/IO max PO max Ordering No.

Output 1

3.0-3.6 V 1.2 V/12 A 14.4 W PMA 4118L SF

3.0-3.6 V 1.5 V/12 A 18 W PMA 4118H SF

3.0-3.6 V 1.8 V/12 A 21.6 W PMA 4218G SF

Ericsson Power Modules Americas

SE-141 75 Kungens Kurva, Sweden Ericsson Inc., Power Modules

Telephone: +46 8 568 69620 +1-877-374-2642

For local sales contacts, please refer to our website Asia/Paciﬁ c

www.ericsson.com/powermodules Ericsson Ltd.

or call: Int +46 8 568 69620, Fax: +46 8 568 69599 +852-2590-7152

For more information about the complete product program, please refer

to our website: www.ericsson.com/powermodules

Delivery option M.o.q. Sufﬁ x Example

Tray 150 pcs /B PMA 4xxx SF/B

Tape & Reel 300 pcs /C PMA 4xxx SF/C

Ordering Information