FAN5240MTCX_NL

更新时间： 2024-01-21 07:09:33

品牌	Logo	应用领域
飞兆/仙童 - FAIRCHILD		多相元件控制器
页数	文件大小	规格书
19页	565K
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FAN5240MTCX_NL 数据手册

March 2006

FAN5240

Multi-Phase PWM Controller for AMD Mobile Athlon^™

and Duron^™

Features

General Description

■ CPU Core power: 0.925V to 2.0V output range

■ ±1% reference precision over temperature

■ Dynamic voltage setting with 5-bit DAC

■ 6V to 24V input voltage range

The FAN5240 is a single output 2-Phase synchronous

buck controller to power AMD’s mobile CPU core. The

FAN5240 includes a 5-bit digital-to-analog converter

(DAC) that adjusts the core PWM output voltage from

0.925VDC to 2.0VDC, which may be changed during

operation. Special measures are taken to allow the out-

put to transition with controlled slew rate to comply with

AMD’s Power Now technology. The FAN5240 includes

a precision reference, and a proprietary architecture with

integrated compensation providing excellent static and

dynamic core voltage regulation. The regulator includes

special circuitry which balances the 2 phase currents for

maximum efﬁciency.

■ 2 phase interleaved switching

■ Active droop to reduce output capacitor size

■ Differential remote voltage sense

■ High efﬁciency:

>90% efﬁciency over wide load range

>80% efﬁciency at light load

■ Excellent dynamic response with Voltage

Feed-Forward and Average Current Mode control

At light loads, when the ﬁlter inductor current becomes

discontinuous, the controller operates in a hysteretic

mode, dramatically improving system efﬁciency. The hys-

teretic mode of operation can be inhibited by the FPWM

control pin.

■ Dynamic duty cycle clamp minimizes inductor current

build up

■ Lossless current sensing on low-side MOSFET or

Precision current sensing using sense resistor

■ Fault protections: Over-voltage, Over-current, and

The FAN5240 monitors the output voltage and issues a

PGOOD (Power-Good) when soft start is completed and

the output is in regulation. A pin is provided to add delay

to PGOOD with an external capacitor.

Thermal Shut-down

■ Controls: Enable, Forced PWM, Power Good, Power

Good Delay

■ QSOP28, TSSOP28

A built-in over-voltage protection (OVP) forces the lower

MOSFET on to prevent the output from exceeding a set

voltage. The PWM controller's overcurrent circuitry moni-

tors the converter load by sensing the voltage drop

across the lower MOSFET. The overcurrent threshold is

set by an external resistor. If precision overcurrent pro-

tection is required, an optional external current-sense

resistor may be used.

Applications

■ AMD Mobile Athlon CPU V

Regulator

CORE

■ Graphic chip V

Regulator

CORE

Ordering Information

Part Number

FAN5240QSC

FAN5240QSCX

FAN5240MTC

FAN5240MTCX

Temperature Range

-10°C to 85°C

Package

QSOP-28

TSSOP-28

Packing

Rails

-10°C to 85°C

Tape and Reel

Rails

-10°C to 85°C

Tape and Reel

FAN5240 Rev. 1.2.0

www.fairchildsemi.com

12 3 4 5 6 7...19

中文翻译

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与FAN5240MTCX_NL相关器件

型号	品牌	获取价格	描述	数据表
FAN5240QSC	FAIRCHILD	获取价格	Multi-Phase PWM Controller for AMD Mobile Athlon TM and Duron TM
FAN5240QSCX	FAIRCHILD	获取价格	Multi-Phase PWM Controller for AMD Mobile Athlon TM and Duron TM
FAN5242QSC	ETC	获取价格
FAN5242QSCX	ETC	获取价格
FAN5250	FAIRCHILD	获取价格	Mobile Processor Core-Voltage Regulator
FAN5250QSC	FAIRCHILD	获取价格	Mobile Processor Core-Voltage Regulator
FAN5250QSCX	FAIRCHILD	获取价格	Mobile Processor Core-Voltage Regulator
FAN5307	FAIRCHILD	获取价格	High-Efficiency Step-Down DC-DC Converter
FAN5307MP15X	FAIRCHILD	获取价格	High-Efficiency Step-Down DC-DC Converter
FAN5307MP18X	FAIRCHILD	获取价格	High-Efficiency Step-Down DC-DC Converter

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