A6902D13TR(2007) Ver la hoja de datos (PDF) - STMicroelectronics

Número de pieza

componentes Descripción

Fabricante

A6902D13TR
(Rev.:2007)

Up to 1A step down switching regulator with adjustable current limit for automotive applications

STMicroelectronics 

A6902D

4

Electrical characteristics

Electrical characteristics

Table 4. Electrical characteristics (TJ=-40 to 85°C, VCC = 12V, unless otherwise specified)

Symbol

Parameter

Test condition

Min Typ Max Unit

VCC

RDS(on)

IL

I0

Operating input voltage

range

V0=1.235V; I0=2A

Mosfet on resistance

Maximum limiting

current

VCC=8.5V

Operating charging

current

Rsense=0.1Ω

8

36

V

0.250 0.5

Ω

2

2.5

3.2

A

0.92

1.08

A

fSW

Switching frequency

Duty cycle

Dynamic characteristics (see test circuit).

V5

Voltage feedback

η

Efficiency

DC characteristics

8V<VCC<36V,

20mA<I0<1A

V0=5V, VCC=12V

212 250 280 kHz

0

100

%

1.198 1.235 1.272 V

90

%

Iqop

Total operating

quiescent current

Iq

Quiescent current

Error amplifier

Duty cycle=0; VFB=1.5V

3

5

mA

2.7

mA

VOH

VOL

Io source

Io sink

Ib

High level output voltage VFB=1V

Low level output voltage VFB=1.5V

Source output current

VCOMP = 1.9V;

VFB = 1V

Sink output current

VCOMP = 1.9V;

VFB = 1.5V

Source bias current

DC open loop gain

RL= ∞

3.6

V

0.4

V

190 300

µA

1

1.5

mA

2.5

4

µA

50

58

dB

gm Transconductance

VOFFS Input offset voltage

ICS+ CS+ output current

ICS-

CS- output current

ICOMP = -0.1mA to

0.1mA; VCOMP = 1.9V

2.3

mS

VCS- = 1.8V; VCS+ =

Vcomp

90

100 110 mV

I0 =1A; RSENSE

=100mΩ;

VOUT<VCC-2V

1.5

3

µA

I0 =1A; RSENSE

=100mΩ;

VOUT<VCC-2V

1.5

3

µA

6/12

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