© Semiconductor Components Industries, LLC, 2009

July, 2009 − Rev. 7

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Publication Order Number:

CS5124/D

CS5124

High Performance,

Integrated Current Mode

PWM Controllers

The CS5124 is a fixed frequency current mode controller designed

specifically for DC−DC converters found in the telecommunications

industry. The CS5124 integrates many commonly required current

mode power supply features and allows the power supply designer to

realize substantial cost and board space savings.

The CS5124 integrates the following features: Internal Oscillator,

Slope Compensation, Sleep On/Off, Undervoltage Lock Out, Thermal

Shutdown, Soft−Start Timer, Low Voltage Current Sense for Resistive

Sensing, Second Current Threshold for Pulse−by−Pulse overcurrent

Protection, a Direct Optocoupler Interface and Leading Edge Current

Blanking.

The CS5124 has supply range of 7.7 V to 20 V and is available in 8

pin SOIC narrow package.

Features

CS5124XDR8

A

= Assembly Location

L

= Wafer Lot

Y

= Year

W

= Work Week

G

= Pb−Free Package

Device

Package

ORDERING INFORMATION

CS5124XD8

SOIC−8

95 Units/Rail

SOIC−8

2500 Tape & Reel

SOIC−8

D SUFFIX

CASE 751

SS

1

8

UVLO

GATE

BIAS

GND

PIN CONNECTIONS AND

MARKING DIAGRAM

CS5124XDR8G

SOIC−8

(Pb−Free)

2500 Tape & Reel

†For information on tape and reel specifications,

including part orientation and tape sizes, please

refer to our Tape and Reel Packaging Specifications

Brochure, BRD8011/D.

http://onsemi.com

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8

CS5124XD8G

SOIC−8

(Pb−Free)

95 Units/Rail