TPS40222

更新时间： 2024-09-13 08:39:03

品牌	Logo	应用领域
德州仪器 - TI		转换器
页数	文件大小	规格书
26页	698K
描述
1.6-A, 1.25-MHz BUCK CONVERTER IN A 3 mm 3 mm SON PACKAGE

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TPS40222 数据手册

TPS40222

www.ti.com

SLUS642A–OCTOBER 2005–REVISED JANUARY 2006

1.6-A, 1.25-MHz BUCK CONVERTER IN A 3 mm × 3 mm SON PACKAGE

FEATURES

APPLICATIONS

•

Disk Drives

Set Top Box

Point of Load Power

ASIC Power Supplies

•

Input Voltage Range 4.5 V_DCto 8 V_DC

Output Voltage (0.8 V to 90% V_IN)

0 A to 1.6 A Current Capability

Fixed 1.25-MHz Switching Frequency

Reference 0.8 V ±1%

DESCRIPTION

Internal 250 mΩ N-Channel MOSFET Switch

The TPS40222 is a fixed-frequency, current-mode,

non-synchronous buck converter optimized for

applications powered by a 5-V distributed source.

With internally determined operating frequency,

soft-start time, and control loop compensation, the

TPS40222 provides many features with a minimum of

external components.

Current Mode Control with Internal Slope

Compensation

•

Internal Soft-Start

Internal Loop Compensation

Short Circuit Protection

Thermal Shutdown

The TPS40222 operates at 1.25 MHz and supports

up to 1.6-A output loads. The output voltage can be

programmed to as low as 0.8 V. The TPS40222

utilizes pulse-by-pulse current limit as well as

frequency foldback to protect the converter during a

catastrophic short circuited output condition.

High Efficiency Up to 92%

Small 3 mm × 3 mm SON Package

SIMPLIFIED APPLICATION DIAGRAM

TYPICAL EFFICIENCY

LOAD CURRENT

100

= 5 V

BOOST AVIN PVIN

TPS40222

OUT

= 3.3 V

FB GND SW

OUT

= 1.25 V

UDG−04135

0.2

0.4

0.6

0.8

1.0

1.2

1.4

1.6

− Load Current − A

LOAD

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.

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...26

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