AMS494 datasheet(1/7 Pages) AMS

Part #	AMS494

Description	Internal regulator provides a stable 5V reference supply

PDF	7 Pages

Scroll/Zoom	100%

Manufacturer	AMS [Advanced Monolithic Systems Ltd]

Direct Link	http://www.ams-semitech.com

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1 / 7 page

Features

• Internal regulator provides a stable 5V reference supply

trimmed to 5%

• Uncommitted output TR for 200mA sink or source

current

• Output control for push-pull or single-ended operation

• Variable duty cycle by dead time control (pin 4) Complete

PWM control circuit

• On-chip oscillator with master or slave operation

• Internal circuit prohibits double pulse at either output

Description

The AMS494 is used for the control circuit of the PWM

switching regulator. The AMS494 consists of 5V reference

voltage circuit, two error amplifiers, flip flop, an output con-

trol circuit, a PWM comparator, a dead time comparator and

an oscillator. This device can be operated in the switching

frequency of 1 KHz to 300 KHz.

Internal Block Diagram

PIN CONFIGURATION

(Top View)

1

2

3

4

5

6

7

12

13

14

15

16

8

9

10

11

1C

2C

3C

4C

5C

6C

7C

COM

1B

2B

3B

4B

5B

6B

7B

E

AMS494

Advanced Monolithic Systems http://www.ams-semitech.com

1

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AMS494 Datasheet(PDF) 1 Page - Advanced Monolithic Systems Ltd

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