LR8N8 データシートの表示（PDF） - Supertex Inc

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LR8N8

High Input Voltage Adjustable 3-Terminal Linear Regulator

Supertex Inc 

LR8

The minimum capacitance required for given boot-up time is

given by the following equation:

COUT

> tBOOT

IPWM − ILIM

VHYS

where

COUT = Capacitor at LR8 output

tBOOT = Time required for supply to bootstrap

IPWM = Current used by PWM controller

ILIM = LR8 current limit (10mA min)

VHYS = PWM controller UVL hysteresis

Remember that this equation is valid only when PWM current

exceeds the LR8’s current limit.

1235 Bordeaux Drive, Sunnyvale, CA 94089

TEL: (408) 744-0100 • FAX: (408) 222-4895

11 www.supertex.com

11/30/01rev.1

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