SC1159 查看數據表（PDF） - Semtech Corporation

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SC1159

Programmable Synchronous DC/DC Hysteretic Controller with VRM 8.5 VID Range

Semtech Corporation 

SC1159

POWER MANAGEMENT

AC Electrical Characteristics (Cont.) (Note 1)

Parameter

Symbols Conditions

Min Typ

Overvoltage Protection

Comparator Propagation Delay Time

Deglitch Time (Includes comparator

protection delay time)

tOVPROP

tOVDGL

1

1

High-Side Vds Sensing

Response Time

tVDSRESP

VHISENSE = 12V, VIOUTLO pulsed

from 12V to 11.9V, 100ns rise

and fall times

VHISENSE = 4.5V, VIOUTLO pulsed

from 4.5V to 4.4V, 100ns rise

and fall times

VHISENSE = 3V, VIOUTLO pulsed

from 3.0V to 2.9V, 100ns rise

and fall times

Short Circuit Protection Rising Edge

Delay

Sample/Hold Switch turn-on/turn-off

Delay

Power Good

Comparator Propagation Delay

Softstart

tVDSRED

tSWXDLY

LOSENSE grounded

3V < VHISENSE < 11V

V = V LOSENSE

HISENSE

tPWRGD

300

30

1

Comparator Propagation Delay

tSLST

overdrive = 10mV

560

Deadtime

Driver Non-overlap Time

LODRV

tNOL

CLOWDR = 9nF, 10% threshold on

LOWDR

30

Propagation Delay

TLODRVDLY

Note:

(1) Guaranteed, but not tested.

(2) This device is ESD sensitive. Use of standard ESD handling precautions is required.

Max

3

2

3

3

500

100

900

100

400

Units

µs

µs

µs

µs

µs

ns

ns

µs

ns

ns

ns

 2002 Semtech Corp.

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