FAN5026MTCX datasheet(1/17 Pages) FAIRCHILD

номер детали	FAN5026MTCX

подробное описание детали	Dual DDR / Dual-Output PWM Controller

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производитель	FAIRCHILD [Fairchild Semiconductor]

домашняя страница	http://www.fairchildsemi.com

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March 2011

www.fairchildsemi.com

FAN5026 • Rev. 1.0.8

FAN5026

Dual DDR / Dual-Output PWM Controller

Features

Highly Flexible, Dual Synchronous Switching PWM

Controller that Includes Modes for:

- DDR Mode with In-phase Operation for

Reduced Channel Interference

- 90° Phase-shifted, Two-stage DDR Mode

for Reduced Input Ripple

- Dual Independent Regulators, 180° Phase

Shifted

Complete DDR Memory Power Solution

- VTT Tracks VDDQ/2

- VDDQ/2 Buffered Reference Output

Lossless Current Sensing on Low-Side MOSFET or

Precision Over-Current Using Sense Resistor

VCC Under-Voltage Lockout

Wide Input Range: 3V to 16V

Excellent Dynamic Response with Voltage

Feedforward and Average Current-Mode Control

Power-Good Signal

Supports DDR-II and HSTL

28-Lead Thin-Shrink Small-Outline Package

Applications

DDR VDDQ and VTT Voltage Generation

PC Dual Power Supply

Server DDR Power

Desktop Computer

Graphics Cards

Description

The FAN5026 PWM controller provides high efficiency

and regulation for two output voltages adjustable in the

range of 0.9V to 5.5V required to power I/O, chip-sets,

and memory banks in high-performance computers,

set-top

boxes,

and

VGA

cards.

Synchronous

rectification and hysteretic operation at light loads

contribute to high efficiency over a wide range of loads.

Efficiency is enhanced by using MOSFET RDS(ON) as a

current-sense component.

Feedforward ramp modulation, average-current mode

control, and internal feedback compensation provide

fast response to load transients. Out-of-phase operation

with 180-degree phase shift reduces input current

ripple. The controller can be transformed into a

complete DDR memory power supply solution by

activating a designated pin. In DDR Mode, one of the

channels tracks the output voltage of another channel

and provides output current sink and source capability

— essential for proper powering of DDR chips. The

buffered reference voltage required by this type of

memory is also provided. The FAN5026 monitors these

outputs and generates separate PGx (power good)

signals when the soft-start is completed and the output

is within ±10% of the set point.

Over-voltage protection prevents the output voltage

from exceeding 120% of the set point. Normal operation

is automatically restored when over-voltage conditions

cease. Under-voltage protection latches the chip off

when output drops below 75% of the set value after the

soft-start sequence for this output is completed. An

adjustable over-current function monitors the output

current by sensing the voltage drop across the lower

MOSFET. If precision current-sensing is required, an

external current-sense resistor may be used.

Related Resources

Application Note — AN-6002 Component

Calculations and Simulation Tools

Ordering Information

Part Number

Operating

Temperature

Range

Package

Packing Method

FAN5026MTCX

-40 to +85°C

28-Lead Thin-Shrink Small-Outline Package (TSSOP)

Tape and Reel

Аналогичный номер детали - FAN5026MTCX

производитель	номер детали	датащи	подробное описание детали
Fairchild Semiconductor	FAN5026MTCX	174Kb / 17P	Dual DDR/Dual-output PWM Controller

More results

Аналогичное описание - FAN5026MTCX

производитель	номер детали	датащи	подробное описание детали
Fairchild Semiconductor	FAN5026	174Kb / 17P	Dual DDR/Dual-output PWM Controller
Fairchild Semiconductor	FAN5236	501Kb / 19P	Dual Mobile-Friendly DDR / Dual-Output PWM Controller
ON Semiconductor	FAN5236	453Kb / 19P	Dual Mobile-Friendly DDR / Dual-Output PWM Controller Nov ember-2017, Rev. 2
Fairchild Semiconductor	FAN5236	234Kb / 20P	Dual Mobile-Friendly DDR / Dual-output PWM Controller
Fairchild Semiconductor	FAN5236	199Kb / 20P	Dual Mobile-Friendly DDR / Dual-output PWM Controller
ON Semiconductor	NCP5201	69Kb / 10P	Dual Output DDR Power Controller September, 2004 ??Rev. 9
ON Semiconductor	NCP5201	83Kb / 9P	Dual Output DDR Power Controller April, 2006 ??Rev. 11
Intersil Corporation	ISL6227	861Kb / 28P	Dual Mobile-Friendly PWM Controller with DDR Option
	ISL6227	840Kb / 27P	Dual Mobile-Friendly PWM Controller with DDR Option
	ISL6227	897Kb / 26P	Dual Mobile-Friendly PWM Controller with DDR Option

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