A6300ABSO8A+ - Swatch Group

R

A6300

High Efficiency Linear Power Supply with Pow er

Surveillance and Time-out

Description

The A6300 offers a high level of integration by combining

voltage regulation and voltage monitoring. The voltage

regulator has a low dropout ( typ. 380 mV at 100 mA ) and a

low quiescent current (100 µA). The quiescent current

increases only slightly in dropout prolonging battery life.

Built-in protection includes a positive transient absorber for

up to 60 V (load dump) and the ability to survive an

unregulated input voltage of –20 V (reverse battery). The

INPUT may be connected to ground or a reverse voltage

without reverse current flow from the OUTPUT to the

INPUT. Upon the OUTPUT voltage rising above VTH, the

reset output, whether RES or RES , will remain active (RES

= 1, RES = 0) for an additional time of 50 ms. This allows

the system voltage and the oscillator of the microprocessor

to stabilize before they becomes fully active. When VOUTPUT

falls below VTH, the reset output goes active. Threshold

voltage can be obtained in different versions: 2 V, 2.4 V, 2.8

V, 3.5 V, 4 V.

Features

 Supply voltage monitoring

 Highly accurate 5 V, 100 mA guaranteed output

 Low dropout voltage, typically 380 mV at 100 mA

 Low quiescent current, typically 100 µA

 Standby mode, maximum current 310 µA (with 100 µA

load on OUTPUT )

 Unregulated DC input can withstand –20 V reverse

battery and + 60 V power transients

 Fully operational for unregulated DC input voltage up to

26 V and regulated output voltage down to 1 V

 Reset output guaranteed for regulated output voltage

down to 1 V

 No reverse output current

 Very low temperature coefficient for the regulated output

 Current limiting

 Clear microprocessor restart after power up

 Push-pull or Open drain output

 -40 to +85 °C temperature range

 SO8 package

Applications

 White / brown goods

 Industrial electronics

 Automotive electronics

 Cellular telephones

 Security systems

 Battery powered products

 High efficiency linear power supplies

Typical Operating Configuration

Fig. 1

Pin Assignment

VSS

NC

SO8

A6300

RES or RES

OUTPUT

INPUTNC

NC

Fig. 2

EM MICROELECTRONIC - MARIN SA

R

A6300

Absolute Maximum Ratings

Parameter Symbol Conditions

Continuous voltage at INPUT

to VSS VINPUT - 0.3 to + 30V

Transients on INPUT for

t < 100 ms and duty cycle 1% VTRANS up to + 60V

Reverse supply voltage on

INPUT VREV - 20 V

Max. voltage at any signal pin VMAX OUTPUT + 0.3V

Min. voltage at any signal pin VMIN V

SS – 0.3V

Storage temperature TSTO - 65 to + 150 °C

Electrostatic discharge max. to

MIL-STD-883C method 3015 VSmax 1000V

Max. soldering conditions TSmax 250 °C x 10s

Table 1

Stresses above these listed maximum ratings may cause

permanent damages to the device. Exposure beyond

specified operating conditions may affect device reliability or

cause malfunc tion.

Handling Procedures

This device has built-in protection against high static

voltages or electric fields; however, it is advised that normal

precautions be taken as for any other CMOS component.

Unless otherwise specified, proper operation can only occur

when all terminal voltages are kept within the voltage range.

Unused inputs must always be tied to a defined logic

voltage level.

Operating Conditions

Parameter Symbol Min. Max. Units

Operating junction

temperature 1) TJ -40 +125 °C

INPUT voltage 2) VINPUT 2.3 26 V

OUTPUT voltage 2)3) V

OUTPUT 1.0 V

Reset output guarant eed VOUTPUT 1.0 V

OUTPUT current 4) I

OUTPUT 100 mA

Thermal resistance from

junction to ambient 5)

- SO8 Rth(j-a) 160 °C/W

Table 2

1) The maximum operating temperature i s confirmed by sampl ing at

initial device qualification. In production, all devi ces are test ed at

+ 85 °C.

2) Full operation guaranteed. To achieve the load regulation

specified i n Table 3 a 22 µF capacitor or greater is required on the

INPUT, see Fig. 6. The 22 µF must have an effecti ve resist ance ≤

5 Ω and a resonant frequency above 500 kHz.

3) A 10 µF load capacitor and a 100 nF decoupling capacitor are

required on the regulator OUTPUT for stability. The 10 µF must

have an effective series resistance of ≤ 5 Ω and a resonant

frequency above 500 k Hz.

4) The OUTPUT current will not apply for all possible combinations

of input voltage and output current. Combinations that would

require the A6300 to work above the maximum junction

temperature (+125 °C) must be avoided.

5) The thermal resistance specified assumes the package is

soldered to a PCB.

R

A6300

Electrical Characteristics

VINPUT = 6.0 V, CL = 10 µF + 100 nF, CINPUT = 22 µF, TJ = -40 to +85 °C, unless otherwise specified

Parameter Symbol Test Conditions Min. Min.

25°C Typ. Max.

25°C Max. Unit

Supply current ISS Reset output open, IL = 100 µA 100 310 µA

Supply current 1) ISS Reset output open, IL = 100 mA

at VINPUT = 8.0 V 1.7 4.2 mA

Output voltage VOUTPUT I

L = 100 µA 4.88 5.12 V

Output voltage VOUTPUT 100 µA ≤ IL ≤ 100 mA,

-40 °C ≤ TJ ≤+125 °C 4.85 5.15 V

Output voltage temperature

coefficient 2) Vth(coeff) 50 180 ppm/°C

Line regulation 3) VLINE 6 V ≤ VINPUT ≤26 V, IL = 1 mA,

TJ = +125 °C 0.2 0.5 %

Load regulation 3) V

L 100 µA ≤ IL ≤ 100 mA 0.2 0.6 %

Dropout voltage 4) V

DROPOUT I

L = 100 µA 40 170 mV

Dropout voltage 4) V

DROPOUT I

L = 100 mA 380 mV

Dropout voltage 4) V

DROPOUT I

L = 100 mA,

-40 °C ≤ TJ ≤+125 °C 650 mV

Dropout supply current ISS V

INPUT = 4.5 V, IL = 100 µA 8) 1.2 1.6 mA

Thermal regulation 5) V

thr T

J = +25 °C, IL = 50 mA,

VINPUT = 26 V, T = 10 ms 0.05 0.25 %/W

Current limit ILmax OUTPUT tied to VSS 450 mA

OUTPUT noise, 10Hz to

100 kHz VNOISE 200 µVrms

VTH Version: AA, AG, AM 1.77 1.84 1.95 2.04 2.17 V

VTH Version: AB, AH, AN 2.09 2.18 2.32 2.41 2.55 V

VTH Version: AC, AI, AO 2.48 2.59 2.73 2.86 3.03 V

VTH Version: AD, AJ, AP 3.11 3.23 3.42 3.59 3.80 V

Threshold voltage

VTH Version: AE, AK, AQ 3.55 3.70 3.88 4.08 4.32 V

Threshold hysteresis VHYS 25 mV

VOL V

OUTPUT = 5 V, IOL = 8 mA 175 400 mV

VOL V

OUTPUT = 3 V, IOL = 4 mA 140 300 mV

RES Output Low Level

VOL V

OUTPUT = 1 V, IOL = 50 µA 20 90 mV

VOH V

OUTPUT = 5 V, IOH =- 8 mA 4.3 4.5 V

VOH V

OUTPUT = 3 V, IOH = -4 mA 2.3 2.6 V

RES Output High Level 7)

VOH V

OUTPUT = 1 V, IOH = -100 µA 850 950 mV

Leakage current 6) ILEAK VOUTPUT = 5 V 0.05 1 µA

Table 3

1) If I NPUT is connected to VSS , no reverse current will flow from t he OUTPUT to the INPUT, however the supply c urrent specified will be sank

by the OUTPUT to supply the A6300.

2) The OUTPUT voltage temperature coeff ici ent is defined as t he worst case voltage change divi ded by the total temperat ure range.

3) Regulation is measured at constant junction temperature using pulse testing with a low duty cycle. Changes in OUTPUT voltage due to

heating effect s are covered in t he specification for thermal regulation.

4) The dropout voltage is defi ned as the INPUT to OUTPUT differential, measured with t he input voltage equal to 5.0 V.

5) Thermal regulat ion is defined as the change in OUTPUT voltage at a time T after a change in power dissipati on is applied, excluding load or

line regulati on eff ects.

6) Only for open drain versi ons.

7) For push-pul l output only

8) Reset out put open

R

A6300

Timing Characteristics

TA = -40 to +85°C, unless otherwise specified

Parameter Symbol Test Conditions Min. Typ. Max. Units

Power on reset time tPOR 25 50 75 ms

Sensitivity 1) t

SEN V

OUTPUT = 5V to 3V in 5µs 20 0.8*tR µs

Propagation time 1) t

R V

OUTPUT = 5V to 3V in 5µs 22 75 200 µs

Table 4

1) Tested on version with VTH higher than 3V

Timing Waveforms

Fig. 3

Block Diagram

Fig. 4

VOUTPUT

VTH

1 V

Logic”1”

Logic”0”

Logic”1”

Logic”0”

tPOR tPOR

tR

tSEN

t

RES

t

RES

t

Voltage

Regulator

Voltage

Reference Voltage

Reference

INPUT

VIN

OUTPUT

Reset

Logic

Timer

VSS

RES

or

RES

Oscillator

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A6300

Pin Description

Pin Name Function

1 RES or RES Reset output

2 VSS Supply ground

3 NC Not connected

4 NC Not connected

5 NC Not connected

6 INPUT Unregulated positive supply

7 OUTPUT Regulated output

8 NC Not connected Table 5

Functional Description

Voltage Regulator

The A6300 has a 5 V ± 2%, 100 mA, low dropout voltage

regulator. The low supply current (typ.100 µA) makes the

A6300 particularly suited to automotive systems then remain

energized 24 hours a day. The input voltage range is 2.3 V

to 26 V for operation and the input protection includes both

reverse battery (20 V below ground) and load dump

(positive transients up to 60 V). There is no reverse current

flow from the OUTPUT to the INPUT when the INPUT

equals VSS. This feature is important for systems which

need to implement (with capacitance) a minimum power

supply hold-up time in the event of power failure. To achieve

good load regulation a 22 µF capacitor (or greater) is

needed on the INPUT (see Fig. 5). Tantalum or aluminium

electrolytics are adequate for the 22 µF capacitor; film types

will work but are relatively expensive. Many aluminium

electrolytics have electrolytes that freeze at about –30 °C,

so tantalums are recommended for operation below –25 °C.

The important parameters of the 22 µF capacitor are an

effective series resistance of ≤ 5 Ω and a resonant

frequency above 500 kHz.

A 10 µF capacitor (or greater) and a 100 nF capacitor are

required on the OUTPUT to prevent oscillations due to

instability. The specification of the 10 µF capacitor is as per

the 22 µF capacitor on the INPUT (see previous paragraph).

The A6300 will remain stable and in regulation with no

external load and the dropout voltage is typically constant as

the input voltage fall to below its minimum level (see

Table 2). These features are especially important in CMOS

RAM keep-alive applications.

Voltage Monitoring

The power-on reset and the power-down reset are

generated internally with a voltage comparison of the

voltage reference and the resistor divider (see Fig. 4).

At power-up the reset output (RES ) is held low (see Fig. 3).

After OUTPUT reaches VTH, the RES output is held low for

an additional power-on-reset (POR) delay tPOR (typically

50 ms).The power-on reset delay prevents repeated

toggling of RES even if VOUTPUT and the INPUT voltage

drops out and recovers. The POR delay allows the

microprocessor’s crystal oscillator time to stabilize and to

ensure correct recognition of the reset signal to the

microprocessor.

The RES output goes active low generating the power-

down reset whenever VOUTPUT falls below VTH. The

sensitivity or reaction time of the internal comparator to the

voltage level on VIN is typically 70 µs.

Temperature Consideration

Care must be taken not to exceed the maximum junction

temperature (+ 125 °C). The power dissipation within the

A6300 is given by the formula:

TTOTAL = (VINPUT – VOUTPUT) * IOUTPUT + (VINPUT) * ISS

The maximum continuous power dissipation at a given

temperature can be calculated using the formula:

P

max = (125 °C – TA) / Rth(j-a)

where Rth(j-a) is the termal resistance from the junction to the

ambient and is specified in Table 2. Note the Rth(j-a) given in

Table 2 assumes that the package is soldered to a PCB.

The above formula for maximum power dissipation assumes

a constant load (i.e. ≥ 100 s). The transient thermal

resistance for a single pulse is much lower than the

continuous value.

R

A6300

OUTPUT Current versus INPUT Voltage

Fig. 5

Typical Application

Fig. 6

0 5 10 15 20 25

30

INPUT voltage [V]

20

0

40

60

80

100

OUTPUT current [mA]

TA=+50°C

TA=+85 °C

T

A

=+25 °C

SO8 package

soldered to PC

board

TJmax = +125 °C

R

A6300

Package Inf ormat ion

Min Nom Max

A 1.35 1.63 1.75

A1 0.10 0.15 0.25

B 0.33 0.41 0.51

C 0.19 0.20 0.25

D 4.80 4.94 5.00

E 3.80 3.94 4.00

e 1.27

H 5.80 5.99 6.20

L 0.40 0.64 1.27

2

3

4

5 6 7 8

H

L

0 - 8°

C

E

A

1

A

B

e

D

Dimensions in mm

Fig. 7

Ordering Information

Part Number: A6300 SO8A

Threshold Voltage and Output Type Package and Delivery Form

SO8B = 8-pin SOIC, Tape & Reel

2.0V 2.4V 2.8V 3.5V 4.0V

SO8A = 8-pin SOIC, Stick

Push-pull, Reset active low AA* AB* AC* AD* AE*

Push-pull, Reset active high AG* AH* AI* AJ* AK*

Open drain, Reset active low AM* AN* AO* A P AQ

Table 6

A

Q

* = non stock item. May be available on request and upon

minimum order quantity (please contact EM Microelectronic).

When ordering, please sp ecify the complet e Part Number, without space between letters: eg. A6300AQSO8A

Part Number Package Marking

A6300%SO8A 6300%%

A6300%%SO8B 6300%%

Table 7

Where %% refers to the 2 letters for the

threshold voltage in Table 6 (AP, AQ, etc).

EM Microelect ronic -Marin SA cannot as sume responsibi lity for us e of any c irc uit ry desc ribed other t han c ircui try ent irely em bod ied in an E M

Microelectronic-Marin SA product. E M Microel ectronic-Marin SA reserves the right t o change the circuitry and specifications without notice at

any time. You are strongly urged to ens ure that the information given has not been superseded by a more up-to-date vers i on.