Data Sheet
March 14, 2006
Austin MinilynxTM 12V SIP Non-isolated Power Modules:
8.3 – 14Vdc Input; 0.75Vdc to 5.5 Vdc Output; 3A Output Current
* UL is a registered trademark of Underwriters Laboratories, Inc.
† CSA is a registered trademark of Canadian Standards Association.
‡ VDE is a trademark of Verband Deutscher Elektrotechniker e.V.
** ISO is a registered trademark of the International Organization of Standards
Document No: DS04-041 ver. 1.3
PDF name: minilynx_sip_12v_ds.pdf
Applications
Distributed power architectures
Intermediate bus voltage applications
Telecommunications equipment
Servers and storage applications
Networking equipment
Enterprise Networks
Latest generation IC’s (DSP, FPGA, ASIC) and
Microprocessor powered applications
Features
Compliant to RoHS EU Directive 2002/95/EC (-Z
versions)
Compliant to ROHS EU Directive 2002/95/EC with
lead solder exemption (non-Z versions)
Delivers up to 3A output current
High efficiency – 91% at 3.3V full load (VIN = 12.0V)
Small size and low profile:
22.9 mm x 10.2 mm x 6.63 mm
(0.90 in x 0.4in x 0.261 in)
Low output ripple and noise
High Reliability:
Calculated MTBF = 10.8 hours at 25oC Full-load
Constant switching frequency (300 kHz)
Output voltage programmable from 0.75 Vdc to 5.5
Vdc via external resistor
Line Regulation: 0.3% (typical)
Load Regulation: 0.4% (typical)
Temperature Regulation: 0.4 % (typical)
Remote On/Off
Output overcurrent protection (non-latching)
Wide operating temperature range (-40°C to 85°C)
UL* 60950-1Recognized, CSA† C22.2 No.
60950-1-03 Certified, and VDE‡ 0805:2001-12
(EN60950-1) Licensed
ISO** 9001 and ISO 14001 certified manufacturing
facilities
Description
Austin MiniLynxTM 12V SIP (single-inline) power modules are non-isolated DC-DC converters that can deliver up to
3A of output current with full load efficiency of 91% at 3.3V output. These modules provide precisely regulated
output voltage programmable via external resistor from 0.75Vdc to 5.5Vdc over a wide range of input voltage (VIN =
8.3 - 14V). Their open-frame construction and small footprint enable designers to develop cost- and space-efficient
solutions. In addition to sequencing, standard features include remote On/Off, programmable output voltage and
over current protection.
RoHS Compliant
Data Sheet
March 14, 2006
Austin MiniLynxTM 12V SIP Non-isolated Power Modules:
8.3 – 14Vdc Input; 0.75Vdc to 5.5Vdc Output; 3A output current
Tyco Electronics Power Systems 2
Absolute Maximum Ratings
Stresses in excess of the absolute maximum ratings can cause permanent damage to the device. These are
absolute stress ratings only, functional operation of the device is not implied at these or any other conditions in
excess of those given in the operations sections of the data sheet. Exposure to absolute maximum ratings for
extended periods can adversely affect the device reliability.
Parameter Device Symbol Min Max Unit
Input Voltage All VIN -0.3 15 Vdc
Continuous
Operating Ambient Temperature All TA -40 85 °C
(see Thermal Considerations section)
Storage Temperature All Tstg -55 125 °C
Electrical Specifications
Unless otherwise indicated, specifications apply over all operating input voltage, resistive load, and temperature
conditions.
Parameter Device Symbol Min Typ Max Unit
Operating Input Voltage Vo,set ≤ 3.63 VIN 8.3 12 14 Vdc
Vo,set > 3.63 VIN 8.3 12 13.2 Vdc
Maximum Input Current All IIN,max 2.2 Adc
(VIN= VIN, min to VIN, max, IO=IO, max VO,set = 3.3Vdc)
Input No Load Current VO,set = 0.75Vdc IIN,No load 45 mA
(VIN = VIN, nom Vdc, IO = 0, module enabled) VO,set = 5.5Vdc IIN,No load 150 mA
Input Stand-by Current All IIN,stand-by 1.2 mA
(VIN = VIN, nom, module disabled)
Inrush Transient All I2t 0.4 A2s
Input Reflected Ripple Current, peak-to-peak
(5Hz to 20MHz, 1µH source impedance; VIN, min to
VIN, max, IO= IOmax ; See Test configuration section)
All 30 mAp-p
Input Ripple Rejection (120Hz) All 30 dB
CAUTION: This power module is not internally fused. An input line fuse must always be used.
This power module can be used in a wide variety of applications, ranging from simple standalone operation to being
part of a complex power architecture. To preserve maximum flexibility, internal fusing is not included, however, to
achieve maximum safety and system protection, always use an input line fuse. The safety agencies require a fast-
acting fuse with a maximum rating of 6 A (see Safety Considerations section). Based on the information provided in
this data sheet on inrush energy and maximum dc input current, the same type of fuse with a lower rating can be
used. Refer to the fuse manufacturer’s data sheet for further information.
Data Sheet
March 14, 2006
Austin MiniLynxTM 12V SIPNon-isolated Power Modules:
8.3 – 14Vdc Input; 0.75Vdc to 5.5Vdc Output; 3A output current
Tyco Electronics Power Systems 3
Electrical Specifications (continued)
Parameter Device Symbol Min Typ Max Unit
Output Voltage Set-point All VO, set -2.5 VO, set +2.5 % VO, set
(VIN=VIN, min, IO=IO, max, TA=25°C)
Output Voltage All VO, set -3% +4% % VO, set
(Over all operating input voltage, resistive load,
and temperature conditions until end of life)
Adjustment Range All VO 0.7525 5.5 Vdc
Selected by an external resistor
Output Regulation
Line (VIN=VIN, min to VIN, max) All
0.3 % VO, set
Load (IO=IO, min to IO, max) All
0.4 % VO, set
Temperature (Tref=TA, min to TA, max) All
0.4 % VO, set
Output Ripple and Noise on nominal output
(VIN=VIN, nom and IO=IO, min to IO, max
Cout = 1µF ceramic//10µFtantalum capacitors)
RMS (5Hz to 20MHz bandwidth) All 10 15 mVrms
Peak-to-Peak (5Hz to 20MHz bandwidth) All 30 50 mVpk-pk
External Capacitance
ESR ≥ 1 mΩ All CO, max 1000 µF
ESR ≥ 10 mΩ All CO, max 3000 µF
Output Current All Io 0 3 Adc
Output Current Limit Inception (Hiccup Mode ) All IO, lim 200 % Io
(VO= 90% of VO, set)
Output Short-Circuit Current All IO, s/c 2 Adc
(VO≤250mV) ( Hiccup Mode )
Efficiency VO,set = 1.2Vdc η 81.5 %
VIN= VIN, nom, TA=25°C VO, set = 1.5Vdc η 84.0 %
IO=IO, max , VO= VO,set V
O,set = 1.8Vdc η 86.0 %
V
O,set = 2.5Vdc η 89.0 %
V
O,set = 3.3Vdc η 91.0 %
V
O,set = 5.0Vdc η 93.0 %
Switching Frequency All fsw 300 kHz
Dynamic Load Response
(dIo/dt=2.5A/µs; VIN = VIN, nom; TA=25°C) All Vpk 200 mV
Load Change from Io= 50% to 100% of
Io,max; 1µF ceramic// 10 µF tantalum
Peak Deviation
Settling Time (Vo<10% peak deviation) All ts 25 µs
(dIo/dt=2.5A/µs; VIN = VIN, nom; TA=25°C) All Vpk 200 mV
Load Change from Io= 100% to 50%of Io,max:
1µF ceramic// 10 µF tantalum
Peak Deviation
Settling Time (Vo<10% peak deviation) All ts 25 µs
Data Sheet
March 14, 2006
Austin MiniLynxTM 12V SIP Non-isolated Power Modules:
8.3 – 14Vdc Input; 0.75Vdc to 5.5Vdc Output; 3A output current
Tyco Electronics Power Systems 4
Electrical Specifications (continued)
Parameter Device Symbol Min Typ Max Unit
Dynamic Load Response
(dIo/dt=2.5A/µs; V VIN = VIN, nom; TA=25°C) All Vpk 75 mV
Load Change from Io= 50% to 100% of Io,max;
Co = 2x150 µF polymer capacitors
Peak Deviation
Settling Time (Vo<10% peak deviation) All ts 100 µs
(dIo/dt=2.5A/µs; VIN = VIN, nom; TA=25°C) All Vpk 75 mV
Load Change from Io= 100% to 50%of Io,max:
Co = 2x150 µF polymer capacitors
Peak Deviation
Settling Time (Vo<10% peak deviation) All ts 100 µs
General Specifications
Parameter Min Typ Max Unit
Calculated MTBF (IO=IO, max, TA=25°C)
per Telecordia SR-332 Issue 1: Method 1 Case 3 10,865,819 Hours
Weight 2.8 (0.1) g (oz.)
Data Sheet
March 14, 2006
Austin MiniLynxTM 12V SIPNon-isolated Power Modules:
8.3 – 14Vdc Input; 0.75Vdc to 5.5Vdc Output; 3A output current
Tyco Electronics Power Systems 5
Feature Specifications
Unless otherwise indicated, specifications apply over all operating input voltage, resistive load, and temperature
conditions. See Feature Descriptions for additional information.
Parameter Device Symbol Min Typ Max Unit
On/Off Signal interface
Device code with Suffix “4” – Positive logic
(On/Off is open collector/drain logic input;
Signal referenced to GND - See feature description
section)
Input High Voltage (Module ON) All VIH ― ― V
IN, max V
Input High Current All IIH ― ― 10 µA
Input Low Voltage (Module OFF) All VIL -0.2 ― 0.3 V
Input Low Current All IIL ― 0.2 1 mA
Device Code with no suffix – Negative Logic
(On/OFF pin is open collector/drain logic input with
external pull-up resistor; signal referenced to GND)
Input High Voltage (Module OFF) All VIH 2.5 ― V
IN,max Vdc
Input High Current All IIH 0.2 1 mA
Input Low Voltage (Module ON) All VIL -0.2 ― 0.3 Vdc
Input low Current All IIL ― 10 µA
Turn-On Delay and Rise Times
(IO=IO, max , VIN = VIN, nom, TA = 25 oC, )
Case 1: On/Off input is set to Logic Low (Module
ON) and then input power is applied (delay from
instant at which VIN =VIN, min until Vo=10% of Vo,set)
All Tdelay ― 3 ― msec
Case 2: Input power is applied for at least one second
and then the On/Off input is set to logic Low (delay from
instant at which Von/Off=0.3V until Vo=10% of Vo, set)
All Tdelay ― 3 ― msec
Output voltage Rise time (time for Vo to rise from 10%
of Vo,set to 90% of Vo, set)
All Trise ― 4 ― msec
Output voltage overshoot – Startup ― 1 % VO, set
IO= IO, max; VIN = VIN, min to VIN, max , TA = 25 oC
Overtemperature Protection All Tref 140 °C
(See Thermal Consideration section)
Input Undervoltage Lockout
Turn-on Threshold All 7.9 V
Turn-off Threshold All 7.8 V
Data Sheet
March 14, 2006
Austin MiniLynxTM 12V SIP Non-isolated Power Modules:
8.3 – 14Vdc Input; 0.75Vdc to 5.5Vdc Output; 3A output current
Tyco Electronics Power Systems 6
Characteristic Curves
The following figures provide typical characteristics for the Austin MiniLynxTM 12 V SIP modules at 25ºC.
70
72
74
76
78
80
82
84
86
88
00.61.21.82.4 3
VIN =14.0V
VIN = 12.0V
VIN = 8.3V
74
76
78
80
82
84
86
88
90
92
00.61.21.82.4 3
VIN = 14.0V
VIN =12.0V
VIN = 8.3V
EFFICIENCY, η (%)
OUTPUT CURRENT, IO (A)
EFFICIENCY, η (%)
OUTPUT CURRENT, IO (A)
Figure 1. Converter Efficiency versus Output Current
(Vout = 1.2Vdc).
Figure 4. Converter Efficiency versus Output Current
(Vout = 2.5Vdc).
70
72
74
76
78
80
82
84
86
88
0 0 .6 1.2 1.8 2 .4 3
VIN = 14.0V
VIN = 12.0V
VIN = 8.3V
71
74
77
80
83
86
89
92
95
0 0.6 1.2 1.8 2.4 3
VIN = 14.0V
VIN = 12.0V
VIN = 8.3V
EFFICIENCY, η (%)
OUTPUT CURRENT, IO (A)
EFFICIENCY, η (%)
OUTPUT CURRENT, IO (A)
Figure 2. Converter Efficiency versus Output Current
(Vout = 1.5Vdc).
Figure 5. Converter Efficiency versus Output Current
(Vout = 3.3Vdc).
72
74
76
78
80
82
84
86
88
90
0 0.6 1.2 1.8 2.4 3
VIN = 14.0V
VIN = 12.0V
VIN = 8.3V
72
75
78
81
84
87
90
93
96
99
0 0.6 1.2 1.8 2 .4 3
VIN =14.0V
VIN = 12.0V
VIN = 8.3V
EFFICIENCY, η (%)
OUTPUT CURRENT, IO (A)
EFFICIENCY, η (%)
OUTPUT CURRENT, IO (A)
Figure 3. Converter Efficiency versus Output Current
(Vout = 1.8Vdc).
Figure 6. Converter Efficiency versus Output Current
(Vout = 5.0Vdc).
Data Sheet
March 14, 2006
Austin MiniLynxTM 12V SIPNon-isolated Power Modules:
8.3 – 14Vdc Input; 0.75Vdc to 5.5Vdc Output; 3A output current
Tyco Electronics Power Systems 7
Characteristic Curves (continued)
The following figures provide typical characteristics for the Austin MiniLynxTM 12V SIP modules at 25ºC.
0
0.2
0.4
0.6
0.8
1
1. 2
1. 4
1. 6
7 8 91011121314
Io=1.5A
Io=0A
Io=3A
INPUT CURRENT, I
IN
(A)
INPUT VOLTAGE, VIN
(
V
)
OUTPUT CURRENT, OUTPUT VOLTAGE
I
O
(A) (1A/div) V
O
(V) (200mV/div)
TIME
,
t
(
5
µ
s/div
)
Figure 7. Input voltage vs. Input Current
(Vout =3.3Vdc).
Figure 10. Transient Response to Dynamic Load
Change from 50% to 100% of full load (Vo = 3.3Vdc).
OUTPUT VOLTAGE
V
O
(V) (10mV/div)
TIME, t (1µs/div)
OUTPUT CURRENT, OUTPUT VOLTAGE
I
O
(A) (1A/div) V
O
(V) (200mV/div)
TIME, t (5 µs/div)
Figure 8. Typical Output Ripple and Noise
(VIN = 12.0V dc, Vo = 0.75Vdc, Io=3A).
Figure 11. Transient Response to Dynamic Load
Change from 100% to 50% of full load (Vo = 3.3 Vdc).
OUTPUT VOLTAGE
V
O
(V) (10mV/div)
TIME, t (1µs/div)
OUTPUT CURRENT, OUTPUT VOLTAGE
I
O
(A) (1A/div) V
O
(V) (50mV/div)
TIME, t (50µs/div)
Figure 9. Typical Output Ripple and Noise
(VIN = 12.0V dc, Vo = 3.3Vdc, Io=3A).
Figure 12. Transient Response to Dynamic Load
Change from 50% to 100% of full load (Vo = 3.3 Vdc,
Cext = 2x150 µF Polymer Capacitors).
Data Sheet
March 14, 2006
Austin MiniLynxTM 12V SIP Non-isolated Power Modules:
8.3 – 14Vdc Input; 0.75Vdc to 5.5Vdc Output; 3A output current
Tyco Electronics Power Systems 8
Characteristic Curves (continued)
The following figures provide typical characteristics for the Austin MiniLynxTM 12 V SIP modules at 25ºC.
OUTPUT CURRENT, OUTPUTVOLTAGE
I
O
(A) (1A/div) V
O
(V) (50mV/div)
TIME, t (50µs/div)
INPUT VOLTAGE OUTPUT VOLTAGE
V
IN
(V) (10V/div) V
O
(V) (1V/div)
TIME, t (1ms/div)
Figure 13. Transient Response to Dynamic Load
Change from 100% of 50% full load (Vo = 3.3Vdc, Cext
= 2x150
µ
F Pol
y
mer Ca
p
acitors
)
.
Figure 16. Typical Start-Up with application of Vin
(VIN = 12.0Vdc, Vo = 3.3Vdc, Io = 3A).
ON/OFF VOLTAGE OUTPUT VOLTAGE
V
On/off
(V) (10V/div) V
O
(V) (1V/div)
TIME, t (1ms/div)
ON/OFF VOLTAGE OUTPUT VOLTAGE
V
On/off
(V) (10V/div) V
O
(V) (0.5V/div)
TIME, t (1ms/div)
Figure 14. Typical Start-Up Using Remote On/Off
(VIN = 12.0Vdc, Vo = 3.3Vdc, Io = 3A).
Figure 17 Typical Start-Up Using Remote On/Off
with Prebias (VIN = 12.0Vdc, Vo = 1.8Vdc, Io = 1.0A,
Vbias =1.0Vdc).
ON/OFF VOLTAGE OUTPUT VOLTAGE
V
On/off
(V) (10V/div) V
O
(V) (1V/div)
TIME, t (1ms/div)
OUTPUT CURRENT,
I
O
(A) (5A/div)
TIME, t (20ms/div)
Figure 15. Typical Start-Up Using Remote On/Off with
Low-ESR external capacitors (7x150uF Polymer)
(
VIN = 12.0Vdc
,
Vo = 3.3Vdc
,
Io = 3A
,
Co = 1050
µ
µµ
µ
F
)
.
Figure 18. Output short circuit Current
(VIN = 12.0Vdc, Vo = 0.75Vdc).
Data Sheet
March 14, 2006
Austin MiniLynxTM 12V SIPNon-isolated Power Modules:
8.3 – 14Vdc Input; 0.75Vdc to 5.5Vdc Output; 3A output current
Tyco Electronics Power Systems 9
Characteristic Curves (continued)
The following figures provide thermal derating curves for the Austin MiniLynxTM 12 V SIP modules.
0
0.5
1
1. 5
2
2.5
3
3.5
20 30 40 50 60 70 80 90
0 LFM
10 0 L F M
0.0
0.5
1. 0
1. 5
2.0
2.5
3.0
3.5
20 30 40 50 60 70 80 90
0 LFM
10 0 LF M
OUTPUT CURRENT, Io (A)
AMBIENT TEMPERATURE, TA OC
OUTPUT CURRENT, Io (A)
AMBIENT TEMPERATURE, TA OC
Figure 19. Derating Output Current versus Local
Ambient Temperature and Airflow (VIN = 12.0 Vdc,
Vo=0.75Vdc).
Figure 22. Derating Output Current versus Local
Ambient Temperature and Airflow (VIN = 12 Vdc,
Vo=5.0 Vdc).
0.0
0.5
1. 0
1. 5
2.0
2.5
3.0
3.5
20 30 40 50 60 70 80 90
0 LFM
10 0 L F M
OUTPUT CURRENT, Io (A)
AMBIENT TEMPERATURE, TA OC
Figure 20. Derating Output Current versus Local
Ambient Temperature and Airflow (VIN = 12.0Vdc,
Vo=1.8 Vdc).
0.0
0.5
1. 0
1. 5
2.0
2.5
3.0
3.5
20 30 40 50 60 70 80 90
0 LFM
100 LFM
OUTPUT CURRENT, Io (A)
AMBIENT TEMPERATURE, TA
O
C
Figure 21. Derating Output Current versus Local
Ambient Temperature and Airflow (VIN = 12.0Vdc,
Vo=3.3 Vdc).
Data Sheet
March 14, 2006
A
ustin MiniLynxTM 12V SIP Non-isolated Power Modules:
8.3 – 14Vdc Input; 0.75Vdc to 5.5Vdc Output; 3A output current
Tyco Electronics Power Systems 10
Test Configurations
TO OSCILLOSCOPE CURRENT PROBE
LTEST
1µH
BATTERY
CS 1000µF
Electrolytic
E.S.R.<0.1Ω
@ 20°C 100kHz
2x100µF
Tantalum
VIN(+)
COM
NOTE: Measure input reflected ripple current with a simulated
source inductance (LTEST) of 1µH. Capacitor CS offsets
possible battery impedance. Measure current as shown
above.
CIN
Figure 23. Input Reflected Ripple Current Test
Setup.
NOTE: All voltage measurements to be taken at the module
terminals, as shown above. If sockets are used then
Kelvin connections are required at the module terminals
to avoid measurement errors due to socket contact
resistance.
V
O
(+)
COM
1uF .
RESISTIVE
LOAD
SCOPE
COPPER STRIP
GROUND PLANE
10uF
Figure 24. Output Ripple and Noise Test Setup.
VO
COM
VIN(+)
COM
RLOAD
Rcontact Rdistribution
Rcontact Rdistribution
Rcontact
Rcontact
Rdistribution
Rdistribution
VIN VO
NOTE: All voltage measurements to be taken at the module
terminals, as shown above. If sockets are used then
Kelvin connections are required at the module terminals
to avoid measurement errors due to socket contact
resistance.
Figure 25. Output Voltage and Efficiency Test Setup.
η
=
VO. IO
VIN. IIN
x 100 %
Efficiency
Design Considerations
Input Filtering
Austin MiniLynxTM 12V SIP module should be
connected to a low -impedance source. A highly
inductive source can affect the stability of the module.
An input capacitance must be placed directly adjacent
to the input pin of the module, to minimize input ripple
voltage and ensure module stability in the presence of
inductive traces that supply input voltage to the module.
In a typical application, 1x22 µF low-ESR ceramic
capacitors (TDK part #: C4532X7R1C226KT) will be
sufficient to provide adequate ripple voltage at the input
of the module. To further minimize ripple voltage at the
input, additional ceramic capacitors are recommended
at the input of the module. Figure 26 shows input ripple
voltage (mVp-p) for various outputs with 1x22µF and
with 4x22 µF ceramic capacitors at full load.
Input Ripple Voltage (mVp-p)
0
30
60
90
1
20
1
50
0 0.9 1.8 2.7 3 .6 4 .5 5.4
1x22uF
4x22uF
Output Voltage (Vdc)
Figure 26. Input ripple voltage for various outputs
with 1x22 µF ceramic capacitor at the input (full-
load).
Data Sheet
March 14, 2006
A
ustin MiniLynxTM 12V SIPNon-isolated Power Modules:
8.3 – 14Vdc Input; 0.75Vdc to 5.5Vdc Output; 3A output current
Tyco Electronics Power Systems 11
Design Considerations (continued)
Output Filtering
The Austin MiniLynxTM 12 V SIP module is designed for
low output ripple voltage and will meet the maximum
output ripple specification with 1 µF ceramic and 10 µF
tantalum capacitors at the output of the module.
However, additional output filtering may be required by
the system designer for a number of reasons. First,
there may be a need to further reduce the output ripple
and noise of the module. Second, the dynamic
response characteristics may need to be customized to
a particular load step change.
To reduce the output ripple and improve the dynamic
response to a step load change, additional capacitance
at the output can be used. Low ESR polymer and
ceramic capacitors are recommended to improve the
dynamic response of the module. For stable operation
of the module, limit the capacitance to less than the
maximum output capacitance as specified in the
electrical specification table. To perform specific
stability and transient response analysis, use Tyco
Power’s Stability Analysis Tool (SAT) available at
power.tycoelectronics.com. Please contact your local
Tyco Power application engineer for availability of
characteristic model of these Austin Lynx modules.
Safety Considerations
For safety agency approval the power module must be
installed in compliance with the spacing and separation
requirements of the end-use safety agency standards,
i.e., UL 60950-1, CSA C22.2 No. 60950-1-03, and VDE
0850:2001-12 (EN60950-1) Licensed.
For the converter output to be considered meeting the
requirements of safety extra-low voltage (SELV), the
input must meet SELV requirements. The power
module has extra-low voltage (ELV) outputs when all
inputs are ELV.
The input to these units is to be provided with a fast-
acting fuse with a maximum rating of 6A in the positive
input lead.
Data Sheet
March 14, 2006
A
ustin MiniLynxTM 12V SIP Non-isolated Power Modules:
8.3 – 14Vdc Input; 0.75Vdc to 5.5Vdc Output; 3A output current
Tyco Electronics Power Systems 12
Feature Description
Remote On/Off
Austin MiniLynxTM 12V SIP power modules feature an
On/Off pin for remote On/Off operation. Two On/Off
logic options are available in the Austin MiniLynxTM 12V
series modules. Positive Logic On/Off signal, device
code suffix “4”, turns the module ON during a logic High
on the On/Off pin and turns the module OFF during a
logic Low. Negative logic On/Off signal, no device code
suffix, turns the module OFF during logic High and turns
the module ON during logic Low.
For positive logic modules, the circuit configuration for
using the On/Off pin is shown in Figure 27. The On/Off
pin is an open collector/drain logic input signal (Von/Off)
that is referenced to ground. During a logic-high
(On/Off pin is pulled high internal to the module) when
the transistor Q1 is in the Off state, the power module is
ON. Maximum allowable leakage current of the
transistor when Von/off = VIN,max is 10µA. Applying a
logic-low when the transistor Q1 is turned-On, the
power module is OFF. During this state VOn/Off must
be less than 0.3V. When not using positive logic On/off
pin, leave the pin unconnected or tie to VIN.
Q1
R2
R1
Q2
R3
R4
Q3 CSS
GND
VIN+
ON/OFF
PWM Enable
+
_
ON/OFF
V
ION/OFF
MODULE
Figure 27. Circuit configuration for using positive
logic On/OFF.
For negative logic On/Off devices, the circuit
configuration is shown is Figure 28. The On/Off pin is
pulled high with an external pull-up resistor (typical Rpull-
up = 68k, +/- 5%). When transistor Q1 is in the Off state,
logic High is applied to the On/Off pin and the power
module is Off. The minimum On/off voltage for logic
High on the On/Off pin is 2.5 Vdc. To turn the module
ON, logic Low is applied to the On/Off pin by turning ON
Q1. When not using the negative logic On/Off, leave
the pin unconnected or tie to GND.
Q1
R1
R2
Q2 CSS
GND
PWM Enable
ON/OFF
VIN+
ON/OFF
_
+
V
I
MODULE
pull-up
R
ON/OFF
Figure 28. Circuit configuration for using negative
logic On/OFF.
Overcurrent Protection
To provide protection in a fault (output overload)
condition, the unit is equipped with internal
current-limiting circuitry and can endure current limiting
continuously. At the point of current-limit inception, the
unit enters hiccup mode. The unit operates normally
once the output current is brought back into its specified
range. The typical average output current during hiccup
is 3.5A.
Input Undervoltage Lockout
At input voltages below the input undervoltage lockout
limit, module operation is disabled. The module will
begin to operate at an input voltage above the
undervoltage lockout turn-on threshold.
Overtemperature Protection
To provide over temperature protection in a fault
condition, the unit relies upon the thermal protection
feature of the controller IC. The unit will shutdown if the
thermal reference point Tref2, (see Figure 31) exceeds
140oC (typical), but the thermal shutdown is not
intended as a guarantee that the unit will survive
temperatures beyond its rating. The module will
automatically restarts after it cools down.
Data Sheet
March 14, 2006
A
ustin MiniLynxTM 12V SIPNon-isolated Power Modules:
8.3 – 14Vdc Input; 0.75Vdc to 5.5Vdc Output; 3A output current
Tyco Electronics Power Systems 13
Feature Descriptions (continued)
Output Voltage Programming
The output voltage of the Austin MiniLynxTM 12V can be
programmed to any voltage from 0.75Vdc to 5.5Vdc by
connecting a resistor (shown as Rtrim in Figure 29)
between Trim and GND pins of the module. Without an
external resistor between Trim and GND pins, the
output of the module will be 0.7525Vdc. To calculate
the value of the trim resistor, Rtrim for a desired output
voltage, use the following equation:
Ω
−
−
=1000
7525.0
10500
Vo
Rtrim
Rtrim is the external resistor in Ω
Vo is the desired output voltage
For example, to program the output voltage of the
Austin MiniLynxTM 12V module to 1.8V, Rtrim is
calculated as follows:
−
−
=1000
7525.08.1
10500
Rtrim
Ω= kRtrim 024.9
V
O
(+)
TRIM
GND
R
trim
LOAD
V
IN
(+)
ON/OFF
Figure 29. Circuit configuration to program output
voltage using an external resistor.
Table 1 provides Rtrim values required for some
common output voltages.
Table 1
VO, set (V) Rtrim (KΩ)
0.7525 Open
1.2 22.46
1.5 13.05
1.8 9.024
2.5 5.009
3.3 3.122
5.0 1.472
Using 1% tolerance trim resistor, set point tolerance of
±2% is achieved as specified in the electrical
specification. The Lynx Programming Tool, available at
power.tycoelectronics.com under the Design Tools
section, helps determine the required external trim
resistor needed for a specific output voltage.
Voltage Margining
Output voltage margining can be implemented in the
Austin MiniLynxTM modules by connecting a resistor,
Rmargin-up, from the Trim pin to the ground pin for
margining-up the output voltage and by connecting a
resistor, Rmargin-down, from the Trim pin to the Output pin
for margining-down. Figure 30 shows the circuit
configuration for output voltage margining. The Lynx
Programming Tool, available at
power.tycoelectronics.com under the Design Tools
section, also calculates the values of Rmargin-up and
Rmargin-down for a specific output voltage and % margin.
Please consult your local Tyco Field Application
Engineer or Account Manager for additional details.
Vo
Austin Lynx or
Lynx II Series
GND
Trim
Q1
Rtrim
Rmargin-up
Q2
Rmargin-down
Figure 30. Circuit Configuration for margining
Output voltage.
Data Sheet
March 14, 2006
A
ustin MiniLynxTM 12V SIP Non-isolated Power Modules:
8.3 – 14Vdc Input; 0.75Vdc to 5.5Vdc Output; 3A output current
Tyco Electronics Power Systems 14
Thermal Considerations
Power modules operate in a variety of thermal
environments; however, sufficient cooling should be
provided to help ensure reliable operation.
Considerations include ambient temperature, airflow,
module power dissipation, and the need for increased
reliability. A reduction in the operating temperature of
the module will result in an increase in reliability. The
thermal data presented here is based on physical
measurements taken in a wind tunnel. The test set-up
is shown in Figure 32. Note that the airflow is parallel to
the long axis of the module as shown in figure 31. The
derating data applies to airflow in either direction of the
module’s long axis.
Tref2
Tref1
Airflow
Figure 31. Tref Temperature measurement location.
The thermal reference point, Tref used in the
specifications is shown in Figure 32. For reliable
operation this temperature should not exceed 115oC.
The output power of the module should not exceed the
rated power of the module (Vo,set x Io,max).
Figure 32. Thermal Test Set-up.
Heat Transfer via Convection
Increased airflow over the module enhances the heat
transfer via convection. Thermal derating curves
showing the maximum output current that can be
delivered by various module versus local ambient
temperature (TA) for natural convection and up to
0.5m/s (100 ft./min) are shown in the Characteristics
Curves section.
A
ir
flow
x
Po w e r M o d ule
W
ind Tunnel
PWBs
5.97_
(0.235)
76.2_
(3.0)
Probe Location
for measuring
airflow and
ambient
temperature
25.4_
(1.0)
Data Sheet
March 14, 2006
A
ustin MiniLynxTM 12V SIPNon-isolated Power Modules:
8.3 – 14Vdc Input; 0.75Vdc to 5.5Vdc Output; 3A output current
Tyco Electronics Power Systems 15
Post solder Cleaning and Drying
Considerations
Post solder cleaning is usually the final circuit-board
assembly process prior to electrical board testing. The
result of inadequate cleaning and drying can affect both
the reliability of a power module and the testability of the
finished circuit-board assembly. For guidance on
appropriate soldering, cleaning and drying procedures,
refer to Tyco Electronics Board Mounted Power
Modules: Soldering and Cleaning Application Note.
Through-Hole Lead-Free Soldering
Information
The RoHS-compliant through-hole products use the
SAC (Sn/Ag/Cu) Pb-free solder and RoHS-compliant
components. They are designed to be processed
through single or dual wave soldering machines. The
pins have an RoHS-compliant finish that is
compatible with both Pb and Pb-free wave soldering
processes. A maximum preheat rate of 3°C/s is
suggested. The wave preheat process should be
such that the temperature of the power module board
is kept below 210°C. For Pb solder, the
recommended pot temperature is 260°C, while the
Pb-free solder pot is 270°C max. Not all RoHS-
compliant through-hole products can be processed
with paste-through-hole Pb or Pb-free reflow process.
If additional information is needed, please consult
with your Tyco Electronics Power System
representative for more details.
Data Sheet
March 14, 2006
A
ustin MiniLynxTM 12V SIP Non-isolated Power Modules:
8.3 – 14Vdc Input; 0.75Vdc to 5.5Vdc Output; 3A output current
Tyco Electronics Power Systems 16
Mechanical Outline
Dimensions are in inches and (millimeters).
Tolerances: x.xx in. ± 0.02 in. (x.x mm ± 0.5 mm) [unless otherwise indicated]
x.xxx in ± 0.010 in. (x.xx mm ± 0.25 mm)
Top View
Side View
PIN FUNCTION
1 Vo
2 Trim
3 GND
4 VIN
5 On/Off
Data Sheet
March 14, 2006
Austin MiniLynxTM 12V SIPNon-isolated Power Modules:
8.3 – 14Vdc Input; 0.75Vdc to 5.5Vdc Output; 3A output current
Tyco Electronics Power Systems 17
Recommended Pad Layout
Dimensions are in inches and (millimeters).
Tolerances: x.xx in. ± 0.02 in. (x.x mm ± 0.5 mm) [unless otherwise indicated]
x.xxx in ± 0.010 in. (x.xx mm ± 0.25 mm)
PIN FUNCTION
1 Vo
2 Trim
3 GND
4 VIN
5 On/Off
Data Sheet
March 14, 2006
Austin MiniLynxTM 12V SIP Non-isolated Power Modules:
8.3 – 14Vdc Input; 0.75Vdc to 5.5Vdc Output; 3A output current
World Wide Headquarters
Tyco Electronics Power Systems, Inc.
3000 Skyline Drive, Mesquite, TX 75149, USA
+1-800-526-7819
(Outside U.S.A.: +1-972-284-2626)
www.power.tycoelectronics.com
e-mail: techsupport1@tycoelectronics.com
Europe, Middle-East and Africa Headquarters
Tyco Electronics (UK) Ltd
Tel: +44 (0) 1344 469 300
Latin America, Brazil, Caribbean Headquarters
Tyco Electronics Power Systems
Tel: +56 2 209 8211
India Headquarters
Tyco Electronics Systems India Pte. Ltd.
Tel: +91 80 841 1633 x3001
Asia-Pacific Headquarters
Tyco Electronics Singapore Pte. Ltd.
Tel: +65 6416 4283
Tyco Electronics Corporation reserves the right to make changes to the product(s) or information contained herein without notice.
No liability is assumed as a result of their use or application. No rights under any patent accompany the sale of any such
product(s) or information.
© 2003 Tyco Electronics Power Systems, Inc., (Mesquite, Texas) All International Rights Reserved.
Document No: DS04-041 ver. 1.3
PDF name: minilynx_sip_12v_ds.pdf
Ordering Information
Please contact your Tyco Electronics’ Sales Representative for pricing, availability and optional features.
Table 2. Device Codes
Device Code Input
Voltage
Output
Voltage
Output
Current
Efficiency
3.3V@ 3A
Connector
Type Comcodes
AXA003A0X 8.3 – 14Vdc 0.75 – 5.5Vdc 3 A 91.0% SIP 108992624
AXA003A0XZ 8.3 – 14Vdc 0.75 – 5.5Vdc 3 A 91.0% SIP CC109101268
AXA003A0X4 8.3 – 14Vdc 0.75 – 5.5Vdc 3 A 91.0% SIP 108992632
AXA003A0X4Z 8.3 – 14Vdc 0.75 – 5.5Vdc 3 A 91.0% SIP CC109104824
-Z refers to RoHS compliant Versions
