SC4519STRT Просмотр технического описания (PDF) - Semtech Corporation

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SC4519STRT

600kHz, 3A Step-Down Switching Regulator

Semtech Corporation 

SC4519

POWER MANAGEMENT

Electrical Characteristics (Cont.)

Unless specified: VIN = 12V, VCOMP = 0.8V, VBST = VIN + 5V, EN = tied to VIN, SYNC = 0, SW = open.

TA = TJ = -40°C to 85°C.

PARAMETER

SYMBOL

CONDITIONS

MIN TYP MAX UNITS

Enable Input Threshold Voltage

VIH

VIL

Enable Input Bias Current

IIL

IIH

SYNC Threshold Voltage

EN = 60mV above threshold

EN = 100mV below threshold

3

V

0.4

V

2.5

µA

5

15

µA

1.5

V

SYNC Input Frequency (4)

750

1200 kHz

SYNC Pin Resistance

VSYNC = 0.5V

20

kΩ

Notes:

(1) The device may not function properly outside its operating input voltage range.

(2) The required minimum input voltage for a regulated output depends on the output voltage and load condition.

(3) Guaranteed by design.

(4) For SYNC applications, please contact factory.

 2007 Semtech Corp.

4

www.semtech.com

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