ZXRD1033NQ16TA 查看數據表（PDF） - Zetex => Diodes

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ZXRD1033NQ16TA

HIGH EFFICIENCY SIMPLESYNC PWM DC-DC CONTROLLERS

Zetex => Diodes 

ZXRD1000 SERIES

Functional Block Diagram

PIN DESCRIPTIONS

‡ See relevant Applications Section

Pin No. Name

Description

1

Bootstrap Bootstrap circuit for generating gate drive

2

VDRIVE

Output to the gate drive circuit for main N/P channel switches

3

PWRGND Power ground

4

GND

Signal ground

5

CT

Timing Capacitor sets oscillator frequency. ‡

6

VINT

Internal Bias Circuit. Decouple with 1µF ceramic capacitor

7

RSENSE+ Higher potential input to the current sense for current limit circuit

8

RSENSE- Lower potential input to the current sense for current limit circuit

9

SHDN

Shutdown control. Active low.

10

Decoup Optional short circuit and overload decoupling capacitor for increased accuracy

11

LBF

Low battery flag output. Active low, open collector output

12

LBSET

Low battery flag set. Can be connected to VIN if unused, or threshold set

via potential divider. ‡

13

VIN

Input Voltage

14

Delay

External R and C to set the desired cycle time for hiccup circuit. ‡

15

Comp

Compensation pin to allow for stability components and soft start. ‡

16

VFB

Feedback Voltage. This pin has a different function between fixed and

adjustable controller options. The appropriate controller must be used for

the fixed or adjustable solution. Connect to VOUT for fixed output, or to

potential divider for adjustable output. ‡

6

ISSUE 4 - OCTOBER 2000

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