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FAN5069
(Rev.:2005)

PWM and LDO Controller Combo

Fairchild Semiconductor 

October 2005

FAN5069

PWM and LDO Controller Combo

Features

■ General Purpose PWM Regulator and LDO Controller

■ Input Voltage Range: 3V to 24V

■ Output Voltage Range: 0.8V to 15V

■ VCC

- 5V

- Shunt Regulator for 12V Operation

■ Support for Ceramic Cap on PWM Output

■ Programmable Current Limit for PWM Output

■ Programmable Switching Frequency (200KHz to 600KHz)

■ RDS(ON) Current Sensing

■ Internal Synchronous Boot Diode

■ Soft-Start for both PWM and LDO

■ Multi-Fault Protection with Optional Auto-restart

■ 16-pin TSSOP Package

Applications

■ PC/Server Motherboard Peripherals

- VCC_MCH (1.5V), VDDQ (1.5V) and VTT_GTL(1.25V)

■ Power Supply for

- FPGA, DSP, Embedded Controllers, Graphic Card Proces-

sor, and Communication Processors

■ Industrial Power Supplies

■ High Power DC-to-DC Converters

Description

The FAN5069 combines a high efficiency PWM controller and a

LDO (Low DropOut) linear regulator controller. Synchronous

rectification provides high efficiency over a wide range of load

currents. Efficiency is further enhanced by using the low-side

MOSFET's RDS(ON) to sense current.

Both the linear and PWM regulator soft-start are controlled by a

single external capacitor, to limit in rush current from the supply

when the regulators are first enabled. Current limit for PWM is

also programmable.

The PWM regulator employs a Summing-Current-Mode control

with external compensation to achieve fast load transient

response and provide system design optimization.

FAN5069 is offered in both industrial temperature grade (-40°C

to +85°C) as well as commercial temperature grade (-10°C to

+85°C)

Ordering Information

Part Number Operating Temp. Range Pb-Free Package

FAN5069MTCX

-10°C to +85°C

Yes 16-Lead TSSOP

FAN5069EMTCX

-40°C to +85°C

Yes 16-Lead TSSOP

Packing Method

Tape and Reel

Tape and Reel

Note: Contact Fairchild Sales for availability of other package options.

Qty/Reel

2500

2500

FAN5069 Rev. 1.1.0

1

©2005 Fairchild Semiconductor Corporation

www.fairchildsemi.com

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