TPS40007 Datasheet

IC型号：
TPS40007
PDF描述：
低输入 (2.25V-5.5V) 300kHz 频率的同步降压控制器，具有输出驱...
文件大小：
634.57KB
PDF页数：
26页
芯片厂家：
TI

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TPS40007

TPS40009

SLUS589A鈭?NOVEMBER 2003 鈭?REVISED MAY 2004

LOW INPUT HIGH EFFICIENCY

SYNCHRONOUS BUCK CONTROLLER

FEATURES

Operating Input Voltage 2.25 V to 5.5 V

Output Voltage as Low as 0.7 V

1% Internal 0.7 V Reference

Predictive Gate Drivet N-Channel MOSFET

Drivers for Higher Efficiency

Externally Adjustable Soft-Start and

Overcurrent Limit

Fixed-Frequency Voltage-Mode Control

鈭?TPS40007, 300 kHz

鈭?TPS40009, 600 kHz

Source/Sink with V

OUT

Prebias

10-Lead MSOP PowerPadt Package for

Higher Performance

Thermal Shutdown

Internal Boostrap Diode

APPLICATIONS

Networking Equipment

Telecom Equipment

Base Stations

Servers

DSP Power

Power Modules

DESCRIPTION

The TPS4000x are controllers for low-voltage,

non-isolated synchronous buck regulators. These

controllers drive an N-channel MOSFET for the

primary buck switch, and an N-channel MOSFET

for the synchronous rectifier switch, thereby

achieving very high-efficiency power conversion. In

addition, the device controls the delays from main

switch off to rectifier turn-on and from rectifier

turn-off to main switch turn-on in such a way as to

minimize diode losses (both conduction and

recovery) in the synchronous rectifier with TI鈥檚

proprietary Predictive Gate Drivet technology. The

reduction in these losses is significant and increases

efficiency. For a given converter power level, smaller

FETs can be used, or heat sinking can be reduced

or even eliminated.

SIMPLIFIED APPLICATION DIAGRAM

VIN

TPS40007

TPS40009

ILIM

COMP

SS/SD

VDD

GND

LDRV

BOOT 10

HDRV

VOUT

UDG鈭?3161

PowerPADt and Predictive Gate Drivet are trademarks of Texas Instruments Incorporated.

PRODUCTION DATA information is current as of publication date.

Products conform to specifications per the terms of Texas Instruments

standard warranty. Production processing does not necessarily include

testing of all parameters.

铮?/div>

2003, 2004 Texas Instruments Incorporated

www.ti.com

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