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KA7500C
SMPS Controller

KA7500C — SMPS Controller

April 2009

Features

 Internal Regulator Provides a Stable 5V Reference

Supply Trimmed to ±1% Accuracy

 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 KA7500C is used for the control circuit of the pulse­width modulation switching regulator. The KA7500C
consists of 5V reference voltage circuit, two error
amplifiers, flip flop, an output control circuit, a PWM
comparator, a dead-time comparator, and an oscillator.

This device can be operated in the switching frequency
of 1kHz to 300kHz. The precision of voltage reference
(V

) is improved up to ±1% with trimming. This

REF

provides a better output voltage regulation. The
operating temperature range is -25°C ~ +85°C.

16-Lead DIP

16-Lead SOP

Ordering Information

Part Number

KA7500C 16-Lead Dual Inline Package (DIP) Tube

KA7500CD Tube

KA7500CDTF

For Fairchild’s definition of Eco Status, please visi t: http://www.fairchildsemi.com/company/green/rohs_green.html.

Operating

Temperature Range

-25 to +85°C RoHS

Eco

Status

Package Packing Method

16-Lead Small Outline Package (SOP)

Tape and Reel

© 2003 Fairchild Semiconductor Corporation www.fairchildsemi.com
KA7500C • Rev. 1.0.2

Block Diagram

KA7500C — SMPS Controller

Figure 1. Block Diagram

© 2003 Fairchild Semiconductor Corporation www.fairchildsemi.com
KA7500C • Rev. 1.0.2 2