ST1S40 datasheet(5/29 Pages) STMICROELECTRONICS

tên linh kiện	ST1S40

Giải thích chi tiết về linh kiện	3 A DC step-down switching regulator

PDF	29 Pages

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nhà sản xuất	STMICROELECTRONICS [STMicroelectronics]

Trang chủ	http://www.st.com

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DocID17928 Rev 5

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ST1S40

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)

4.0

6.0

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/

IOUT

Reference load

regulation

Isw = 10 mA to ILIM(2)

0.5

%VOUT/

VIN

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

A

IFB

FB bias current

Enable

VEN

EN threshold voltage

Device ON level

1.2

Device OFF level

0.4

IEN

EN current

A

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