FAN5069 データシートの表示（PDF） - Fairchild Semiconductor

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FAN5069

PWM and LDO Controller Combo

Fairchild Semiconductor 

FAN5069

PWM and LDO Controller Combo

September 2006

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

Processor, and Communication Processors

■ Industrial Power Supplies

■ High-Power DC-to-DC Converters

Description

The FAN5069 combines a high-efficiency Pulse-Width-

Modulated (PWM) controller and an LDO (Low DropOut)

linear regulator controller. Synchronous rectification pro-

vides 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 con-

trolled by a single external capacitor, to limit in-rush cur-

rent 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 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 Packing Method

FAN5069MTCX

-10°C to +85°C

Yes 16-Lead TSSOP Tape and Reel

FAN5069EMTCX

-40°C to +85°C

Yes 16-Lead TSSOP Tape and Reel

Qty./Reel

2500

2500

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

© 2005 Fairchild Semiconductor Corporation

FAN5069 Rev. 1.1.5

www.fairchildsemi.com

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