Datasheet > TC115_13

TC115_13

更新时间： 2024-11-23 12:27:19

品牌	Logo	应用领域
美国微芯 - MICROCHIP		转换器
页数	文件大小	规格书
14页	232K
描述
PFM/PWM Step-Up DC/DC Converter

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中文翻译

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TC115_13 数据手册

TC115

PFM/PWM Step-Up DC/DC Converter

Features

Package Type

SOT-89-5

• High Efficiency at Low Output Load Currents via

PFM Mode

• Assured Start-up at 0.9V

• 80 µA (Typ) Supply Current

GND

• 85% Typical Efficiency at 100 mA

• 140 mA Typical Output Current @ V_IN 2.0V

• Low Power Shutdown Mode

TC115

SHDN

• No External Switching Transistor Needed

• Space-Saving SOT-89 Package

General Description

Applications

The TC115 is a high-efficiency step-up DC/DC

converter for small, low input voltage or battery-

powered systems. This device has a start-up voltage

of 0.9V and a typical supply current of 80 µA. Phase

compensation and soft-start circuitry are included on-

chip. Unlike conventional PWM step-up converters,

the TC115 automatically shifts to pulse frequency

modulation (PFM) at low loads, resulting in reduced

supply current and improved efficiency.

• Pagers

• Cellular Phones

• Palmtops

• 1-Cell to 3-Cell Battery Powered Systems

• Cameras, Video Recorders

• Local +3V to +5V Supplies

The TC115 requires only an external diode, an inductor

and a capacitor, while supporting typical output cur-

rents of 140 mA. Supply current is reduced to less than

0.5 µA (max) when SHDN input is brought low.

Small size, low installed cost and low supply current

make the TC115 step-up converter ideal for use in a

wide range of battery-powered systems.

Functional Block Diagram

100 µH

Sumida CD-54

+3V

OUT

10 µF

IN5817

1.5V

47 µF

Tantalum

GND

TC115

SHDN

1.5V to +3V, 50 mA Supply

 2002-2012 Microchip Technology Inc.

DS21361D-page 1

12 3 4 5 6 7...14

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