AST1S31HF datasheet(7/33 Pages) STMICROELECTRONICS

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AST1S31HF

Electrical characteristics

TJ = -40 °C to 125 °C, VIN = 4 V, unless otherwise specified.

Table 4. Electrical characteristics

Symbol

Parameter

Test condition

Values

Unit

Min.

Typ.

Max.

VIN

Operating input voltage range

2.8

VINON

Turn-on VCC threshold

2.3

2.45

2.6

VINOFF

Turn-off VCC threshold

1.85

2.0

2.15

RDSON-P High-side switch on-resistance

ISW = 300 mA, TJ = 25 °C

110



ISW = 300 mA

140

RDSON-N Low-side switch on- resistance

ISW = 300 mA, TJ = 25 °C



ISW = 300 mA

110

ILIM

Maximum limiting current

3.6

6.0

Oscillator

FSW

Switching frequency

1.75

2.3

2.5

MHz

Dynamic characteristics

VFB

Feedback voltage

ILOAD = 0 A

0.79

0.8

0.81

DC characteristics

Quiescent current

Duty cycle = 0, no load VFB = 1.2 V

630

1200

A

IQST-BY

Total standby quiescent current OFF

A

Enable

VEN

EN threshold voltage

Device ON level

1.5

Device OFF level

0.5

IEN

EN current

0.1

A

Power Good

PG threshold

929496

%VFB

PG output voltage low

Isink = 6 mA open drain

400

PG rise delay

170

s

Soft-start

TSS

Soft-start duration

400

s

Protection

TSHDN

Thermal shutdown

(1)

150

°C

Hystereris

(1)

1. Guaranteed by design.

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