Datasheet > TPS61252

TPS61252

更新时间： 2024-11-15 08:38:51

品牌	Logo	应用领域
TAOS		转换器输入元件升压转换器
页数	文件大小	规格书
21页	439K
描述
TINY 1.5-A BOOST CONVERTER WITH ADJUSTABLE INPUT CURRENT LIMIT

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中文翻译

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TPS61252 数据手册

TPS61252

www.ti.com

SLVSAG3 –SEPTEMBER 2010

TINY 1.5-A BOOST CONVERTER WITH ADJUSTABLE INPUT CURRENT LIMIT

Check for Samples: TPS61252

FEATURES

•

Short Circuit Protection

•

Resistor Programmable Input Current Limit

Typical Operating Frequency 3.25 MHz

Available in a 2×2-mm QFN-8 Package

–

±20% Current Accuracy at 500 mA over Full

Temperature Range

APPLICATIONS

–

Programmable from 100 mA up to 1500 mA

•

USB Host Supplies from a Single Li-Ion

Battery

Current Limited Applications

Li-Ion Applications

Audio Applications

RF-PA Buffer

•

Up to 92% Efficiency

V_INRange from 2.3 V to 6.0 V

•

Power Good Indicates Appropriate Output

Voltage Level

•

Adjustable Output Voltage up to 6.5 V

100% Duty-Cycle Mode When V_IN> V_OUT

Load Disconnect and Reverse Current

Protection

DESCRIPTION

The TPS61252 device provides a power supply solution for products powered by either a three-cell alkaline,

NiCd or NiMH battery, or an one-cell Li-Ion or Li-polymer battery. The wide input voltage range is ideal to power

portable applications like mobile phones or for computer peripherals. The device has a resistor programmable

(R_ILIM) input current limit and is suitable for a wide variety of applications.

During light loads the device will automatically enter skip mode (PFM), which allows the converter to maintain the

required output voltage, while only drawing 30 mA from the battery. This will allow maximum efficiency at lowest

quiescent currents.

TPS61252 allows the use of small inductors and input capacitors to achieve a small solution size. The possibility

to reduce the current limit by a external resistor offers the potential use of physically even smaller inductors with

lower rated current to further reduce total solution sizes of the power supply. During shutdown, the load is

completely disconnected from the battery. The TPS61252 is available in a 8-pin QFN package measuring 2×2

mm (DSG).

V_OUT

VOUT

1 μH

5.0 V

V_IN

768 kΩ

C_FF

100 pF

VIN

C_OUT

22 µF

2.3 V to

6.0 V

10 µF

1 MΩ

243 kΩ

ILIM

R_ILIM

20 kΩ

Power Good

Output

GND

TPS61252

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...21

中文翻译

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与TPS61252相关器件

型号	品牌	获取价格	描述	数据表
TPS61252DSGR	TI	获取价格	电流精度为 ±20%、具备可调节输入电流限制的 3.5MHz、1.5A、效率为 92% 的
TPS61252DSGT	TI	获取价格	电流精度为 ±20%、具备可调节输入电流限制的 3.5MHz、1.5A、效率为 92% 的
TPS61253	TI	获取价格	3.5-MHz HIGH EFFICIENCY STEP-UP CONVERTER IN CHIP SCALE PACKAGING
TPS612531A	TI	获取价格	TPS61253A 3.8-MHz, 5-V / 4-A Boost Converter in 1.2-mm x 1.3-mm WCSP
TPS612532A	TI	获取价格	TPS61253A 3.8-MHz, 5-V / 4-A Boost Converter in 1.2-mm x 1.3-mm WCSP
TPS612532AYFFR	TI	获取价格	TPS61253A 3.8-MHz, 5-V / 4-A Boost Converter in 1.2-mm x 1.3-mm WCSP
TPS61253A	TI	获取价格	采用 1.2mm x 1.3mm WCSP 封装的 3.8MHz、5V/4A 升压转换器
TPS61253A_V01	TI	获取价格	TPS61253A 3.8-MHz, 5-V / 4-A Boost Converter in 1.2-mm x 1.3-mm WCSP
TPS61253AYFFR	TI	获取价格	采用 1.2mm x 1.3mm WCSP 封装的 3.8MHz、5V/4A 升压转换器
TPS61253AYFFT	TI	获取价格	采用 1.2mm x 1.3mm WCSP 封装的 3.8MHz、5V/4A 升压转换器

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