ST1S41 datasheet(5/27 Pages) STMICROELECTRONICS

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DocID023654 Rev 2

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ST1S41

Electrical characteristics

TJ = 25 °C, VCC = 12 V, unless otherwise specified.

Table 4. Electrical characteristics

Symbol

Parameter

Test condition

Values

Unit

Min.

Typ.

Max.

VIN

Operating input voltage

range

(1)

418

VINON

Turn-on VCC threshold

(1)

2.9

VINHYS

Threshold hysteresis

(1)

0.250

RDSON-P

High-side switch on-

resistance

ISW=750 mA

RDSON-N

Low-side switch on-

resistance

ISW=750 mA

ILIM

Maximum limiting current

(2)

5.0

7.0

Oscillator

FSW

Switching frequency

0.7

0.85

MHz

DMAX

Maximum duty cycle

(2)

100

Dynamic characteristics

VFB

Feedback voltage

0.784

0.8

0.816

(1)

0.776

0.8

0.824

%VOUT/

ΔIOUT

Reference load

regulation

Isw=10 mA to ILIM

(2)

0.5

%VOUT/

ΔVIN

Reference line regulation

VIN= 4.0 V to 18 V

(2)

0.4

DC characteristics

Quiescent current

Duty cycle=0, no load

VFB=1.2 V

1.5

2.5

IQST-BY

Total standby quiescent

current

OFF

2.4

4.5

μA

OFF (1)

IFB

FB bias current

Enable

VEN

EN threshold voltage

Device ON level

1.2

Device OFF level

0.4

IEN

EN current

μA

Soft-start

TSS

Soft-start duration

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