ST1S31 datasheet(6/35 Pages) STMICROELECTRONICS

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Electrical characteristics

ST1S31

6/35

DocID022998 Rev 4

Electrical characteristics

TJ = 25 °C, VIN = 5 V, unless otherwise specified.

Table 4. Electrical characteristics

Symbol

Parameter

Test condition

Values

Unit

Min.

Typ.

Max.

VIN

Operating input voltage range

(1)

2.8

5.5

VINON

Turn-on VCC threshold

(1)

2.4

VINOFF

Turn-off VCC threshold

(1)

2.0

RDSON-P High-side switch ON-resistance ISW = 300 mA



RDSON-N Low-side switch ON-resistance ISW = 300 mA



ILIM

Maximum limiting current

(2)

4.0

Oscillator

FSW

Switching frequency

1.2

1.5

1.9

MHz

DMAX

Maximum duty cycle

(2)

100

Dynamic characteristics

VFB

Feedback voltage

0.792

0.8

0.808

Io = 10 mA to 4 A(1)

0.776

0.8

0.824

%VOUT/

IOUT

Reference load regulation

Io = 10 mA to 4 A(2)

0.2

0.6

%VOUT/

VIN

Reference line regulation

VIN = 2.8 V to 5.5 V(2)

0.2

0.3

DC characteristics

Quiescent current

Duty cycle = 0, no load VFB = 1.2 V

630

1200

µA

IQST-BY

Total standby quiescent current OFF

µA

Enable

VEN

EN threshold voltage

Device ON level

1.5

Device OFF level

0.5

IEN

EN current

0.1

µA

Power Good

PG threshold

%VFB

PG hystereris

PG output voltage low

Isink = 6 mA open drain

400

PG rise delay

170

µs

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