A5972D datasheet(5/12 Pages) STMICROELECTRONICS

部件名	A5972D

功能描述	2A switch step down switching regulator for automotive applications

PDF	12 Pages

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制造商	STMICROELECTRONICS [STMicroelectronics]

网页	http://www.st.com

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A5972D

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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

Operating input voltage

range

V0=1.235V; I0=2A

4.4

RDS(on)

Mosfet on resistance

0.250

0.5

Ω

Maximum limiting

current

VCC=5V

2.5

fSW

Switching frequency

212

250

280

kHz

Duty cycle

100

Dynamic characteristics (see test circuit).

Voltage feedback

4.4V<VCC<36V,

20mA<I0<2A

1.198

1.235

1.272

Efficiency

V0=5V, VCC=12V

DC characteristics

Iqop

Total operating

quiescent current

Quiescent current

Duty cycle=0; VFB=1.5V

2.5

Error amplifier

VOH

High level output voltage VFB=1V

3.5

VOL

Low level output voltage VFB=1.5V

0.4

Io source

Source output current

VCOMP = 1.9V;

VFB = 1V

190

300

µA

Io sink

Sink output current

VCOMP = 1.9V;

VFB = 1.5V

11.5

Source bias current

2.5

µA

DC open loop gain

RL=

Transconductance

ICOMP = -0.1mA to

0.1mA; VCOMP = 1.9V

2.3

∞

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