TPS5431

更新时间： 2024-09-19 04:27:31

品牌	Logo	应用领域
德州仪器 - TI		转换器输入元件
页数	文件大小	规格书
21页	691K
描述
1.6 MHz, 3-V TO 6-V INPUT, 3-A SYNCHRONOUS STEP-DOWN SWIFT⑩ CONVERTER WITH DISABLED SINKING DURING START-UP

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TPS5431 数据手册

TPS54377

www.ti.com

SLVS779–SEPTEMBER 2007

1.6 MHz, 3-V TO 6-V INPUT, 3-A SYNCHRONOUS STEP-DOWN SWIFT™ CONVERTER

WITH DISABLED SINKING DURING START-UP

FEATURES

DESCRIPTION

•

60-mΩ MOSFET Switches for High Efficiency

at 3-A Continuous Output Current

As a member of the SWIFT™ family of dc/dc

regulators, the TPS54377 low-input-voltage

high-output-current synchronous-buck PWM

•

Adjustable Output Voltage Down to 0.9 V With

1% Accuracy

converter integrates all required active components.

Included on the substrate with the listed features are

a true, high performance, voltage error amplifier that

provides high performance under transient conditions;

an undervoltage-lockout circuit to prevent start-up

until the input voltage reaches 3 V; an internally and

externally set slow-start circuit to limit in-rush

Switching Frequency: Adjustable From

280 kHz to 1600 kHz

•

Disabled Current Sinking During Start-Up

Fast Transient Response

Load Protected by Peak Current Limit and

Thermal Shutdown

currents; and

a power good output useful for

•

Integrated Solution Reduces Board Area and

Total Cost

processor/logic reset, fault signaling, and supply

sequencing.

•

Spacing Saving 4mm x 5mm QFN Packaging

For reliable power up in output precharge

applications, the TPS54377 is designed to only

source current during start-up.

For SWIFT Documentation, Application Notes,

and Design Software, see the TI website at

www.ti.com/swift

The TPS54377 device is available in a thermally

enhanced 24-pin QFN (RHF) PowerPAD™ package,

which eliminates bulky heatsinks. TI provides

evaluation modules and the SWIFT designer software

tool to aid in achieving high-performance power

supply designs to meet aggressive equipment

development cycles.

APPLICATIONS

•

Low-Voltage, High-Density Systems With

Power Distributed at 5 V or 3.3 V

Point of Load Regulation for High

Performance DSPs, FPGAs, ASICs, and

Microprocessors

•

Broadband, Networking and Optical

Communications Infrastructure

START-UP WAVEFORM

Simplified Schematic

= 1 Ω

Input

Output

TPS54377

VIN

PWRGD

SS/ENA

SYNC

BOOT

PGND

V = 3.3 V

VSENSE

VBIAS

AGND COMP

= 1.8 V

5.0 ms/div

* Optional

Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of

Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.

SWIFT, PowerPAD are trademarks of Texas Instruments.

PRODUCTION DATA information is current as of publication date.

Products conform to specifications per the terms of the Texas

Instruments standard warranty. Production processing does not

necessarily include testing of all parameters.

12 3 4 5 6 7...21

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