TPS54873

更新时间： 2024-11-17 22:49:39

品牌	Logo	应用领域
德州仪器 - TI		输出元件输入元件
页数	文件大小	规格书
15页	164K
描述
4-V TO 6-V INPUT, 8-A OUTPUT SYNCHRONOUS BUCK SWITCHER WITH DISABLED SINKING DURING START-UP

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数据手册

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TPS54873 数据手册

Typical Size

6,4 mm X 9,7 mm

www.ti.com

TPS54873

SLVS444 – OCTOBER 2002

4-V TO 6-V INPUT, 8-A OUTPUT SYNCHRONOUS BUCK

SWITCHER WITH DISABLED SINKING DURING START-UP

FEATURES

DESCRIPTION

30-mΩ, 12-A Peak MOSFET Switches for High

Efficiency at 8-A Continuous Output Source

or Sink Current

As a member of the SWIFT family of dc/dc regulators,

the TPS54873 low-input voltage high-output current

synchronous buck PWM converter integrates all

required active components. Included on the substrate

with the listed features are a true, high performance,

voltage error amplifier that enables maximum

performance and flexibility in choosing the output filter

L and C components; an under-voltage-lockout circuit

to prevent start-up until the input voltage reaches 4 V;

an internally or externally set slow-start circuit to limit

inrush currents; and a power good output useful for

processor/logic reset, fault signaling, and supply

sequencing.

Disabled Current Sinking During Start-Up

0.9-V to 3.3-V Adjustable Output Voltage

Range With 1.0% Accuracy

Wide PWM Frequency:

Fixed 350 kHz, 550 kHz or

Adjustable 280 kHz to 700 kHz

Synchronizable to 700 kHz

Load Protected by Peak Current Limit and

Thermal Shutdown

Integrated Solution Reduces Board Area and

Component Count

For reliable power up in output precharge applications,

the TPS54873 is designed to only source current during

startup.

APPLICATIONS

The TPS54873 is available in a thermally enhanced

28-pin TSSOP (PWP) PowerPAD package, which

eliminates bulky heatsinks. TI provides evaluation

modules and the SWIFT designer software tool to aid

in quickly achieving high-performance power supply

designs to meet aggressive equipment development

cycles.

Low-Voltage, High-Density Distributed Power

Systems

Point of Load Regulation for High

Performance DSPs, FPGAs, ASICs and

Microprocessors

Broadband, Networking and Optical

Communications Infrastructure

Power PC Series Processors

TYPICAL APPLICATION

START-UP WAVEFORM

I/O Supply

VIN

Core Supply

= 5 V

TPS54873

BOOT

PGND

VSENSE

VBIAS

= 3.3 V

AGND COMP

5.0 ms/div

*Optional

Pleasebe 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.

PowerPAD and SWIFT are trademarks of TexasInstruments.

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.

12 3 4 5 6 7...15

中文翻译

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与TPS54873相关器件

型号	品牌	获取价格	描述	数据表
TPS54873PWP	TI	获取价格	4-V TO 6-V INPUT, 8-A OUTPUT SYNCHRONOUS BUCK SWITCHER WITH DISABLED SINKING DURING START-
TPS54873PWPR	TI	获取价格	4-V TO 6-V INPUT, 8-A OUTPUT SYNCHRONOUS BUCK SWITCHER WITH DISABLED SINKING DURING START-
TPS54873PWPRG4	TI	获取价格	12A SWITCHING REGULATOR, 762kHz SWITCHING FREQ-MAX, PDSO28, GREEN, PLASTIC, HTSSOP-28
TPS54880	TI	获取价格	4-V TO 6-V INPUT, 8-A OUTPUT TRACKING SYNCHRONOUS BUCK PWM SWITCHER WITH INTEGRATED FETs (
TPS54880PWP	TI	获取价格	4-V TO 6-V INPUT, 8-A OUTPUT TRACKING SYNCHRONOUS BUCK PWM SWITCHER WITH INTEGRATED FETs (
TPS54880PWPR	TI	获取价格	4-V TO 6-V INPUT, 8-A OUTPUT TRACKING SYNCHRONOUS BUCK PWM SWITCHER WITH INTEGRATED FETs (
TPS54880PWPRG4	TI	获取价格	4-V TO 6-V INPUT, 8-A OUTPUT TRACKING SYNCHRONOUS BUCK PWM SWITCHER WITH INTEGRATED FETs (
TPS548A20	TI	获取价格	1.5V 至 20V、15A 同步 SWIFT™ 降压转换器
TPS548A20RVER	TI	获取价格	1.5V 至 20V、15A 同步 SWIFT™ 降压转换器 \| RVE \| 28 \| -
TPS548A20RVET	TI	获取价格	1.5V 至 20V、15A 同步 SWIFT™ 降压转换器 \| RVE \| 28 \| -

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