SC4519HEVB Просмотр технического описания (PDF) - Semtech Corporation

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SC4519HEVB

600kHz, 3A Step-Down Switching Regulator

Semtech Corporation 

SC4519H

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 125°C.

PARAMETER

SYMBOL

CONDITIONS

MIN TYP MAX UNITS

Enable Input Threshold Voltage

VETH

Enable Output Bias Current

IEOL

IEOH

SYNC Threshold Voltage

EN = 50mV below threshold

EN = 50mV above threshold

1.1 1.27 1.5

V

8

µA

10

µA

1.5

V

SYNC Input Frequency (4)

800

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) Please contact factory for SYNC applications.

 2007 Semtech Corp.

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