Datasheet > LTC1503-1.8

LTC1503-1.8

更新时间： 2024-01-01 11:17:20

品牌	Logo	应用领域
凌特 - Linear		转换器
页数	文件大小	规格书
12页	190K
描述
High Efficiency Inductorless Step-Down DC/DC Converters

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中文翻译

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数据手册

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LTC1503-1.8 数据手册

LTC1503-1.8/LTC1503-2

High Efficiency Inductorless

Step-Down DC/DC Converters

FEATURES

DESCRIPTIO

The LTC^®1503-1.8/LTC1503-2 are switched capacitor

step-down DC/DC converters that produce a regulated

output from a 2.4V to 6V input. The parts use switched

capacitor fractional conversion to achieve high efficiency

over the entire input range. No inductors are required.

Internal circuitry controls the step-down conversion ratio

to optimize efficiency as the input voltage and load condi-

tions vary. Typical efficiency is 25% higher than that of a

low dropout (LDO) linear regulator.

■

Input Voltage Range: 2.4V to 6V

■

Fixed Output Voltages: 1.8V ±4%, 2V ±4%

■

Output Current: Up to 100mA

No Inductors

■

Typical Efficiency 25% Higher than LDOs

■

Low Operating Current: 25µA

■

Low Shutdown Current: 5µA

600kHz Switching Frequency

Shutdown Disconnects Load from V_IN

Soft-Start Limits Inrush Current at Turn-On

Short-Circuit and Overtemperature Protected

Available in 8-Pin MSOP and SO Packages

Regulation is achieved by sensing the output voltage and

enabling the internal switching network as needed to

maintain a fixed output voltage. This method of regulation

enables the parts to achieve high efficiency at extremely

lightloads. Lowoperatingcurrent(25µAwithnoload, 5µA

in shutdown) and low external parts count (two 1µF flying

capacitors and two 10µF bypass capacitors) make the

LTC1503-1.8/LTC1503-2 ideally suited for space con-

strained battery-powered applications. The parts are fully

short-circuit and overtemperature protected.

APPLICATIO S

■

Cellular Phones

■

Handheld Computers

■

Smart Card Readers

Low Power DSP Supplies

Portable Electronic Equipment

Handheld Medical Instruments

■

The LTC1503-1.8/LTC1503-2 are available in 8-pin MSOP

and SO packages.

■

, LTC and LT are registered trademarks of Linear Technology Corporation.

TYPICAL APPLICATIO

Efficiency vs Input Voltage

100

= 100mA

OUT

Single Li-Ion to 2V DC/DC Converter

LTC1503-2

= 2V

OUT

= 1mA

OUT

–

= 100mA

1-CELL Li-Ion OR

3-CELL NiMH

10µF

–

1µF

“IDEAL” LDO

SHDN/SS GND

1503-1.8/2 TA01

LTC1503-2

= 2V

OUT

INPUT VOLTAGE (V)

1503-1.8/2 TA02

12 3 4 5 6 7...12

中文翻译

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与LTC1503-1.8相关器件

型号	品牌	获取价格	描述	数据表
LTC1503-1.8_15	Linear	获取价格	High Efficiency Inductorless Step-Down DC/DC Converters
LTC1503-2	Linear	获取价格	High Efficiency Inductorless Step-Down DC/DC Converters
LTC1503-2_15	Linear	获取价格	High Efficiency Inductorless Step-Down DC/DC Converters
LTC1503CMS8-1.8	Linear	获取价格	High Efficiency Inductorless Step-Down DC/DC Converters
LTC1503CMS8-1.8#PBF	Linear	获取价格	LTC1503 - High Efficiency Inductorless Step-Down DC/DC Converter; Package: MSOP; Pins: 8;
LTC1503CMS8-1.8#TR	Linear	获取价格	LTC1503 - High Efficiency Inductorless Step-Down DC/DC Converter; Package: MSOP; Pins: 8;
LTC1503CMS8-1.8#TRPBF	Linear	获取价格	LTC1503 - High Efficiency Inductorless Step-Down DC/DC Converter; Package: MSOP; Pins: 8;
LTC1503CMS8-2	Linear	获取价格	High Efficiency Inductorless Step-Down DC/DC Converters
LTC1503CMS8-2#PBF	Linear	获取价格	LTC1503 - High Efficiency Inductorless Step-Down DC/DC Converter; Package: MSOP; Pins: 8;
LTC1503CMS8-2#TRPBF	Linear	获取价格	IC 1-OUTPUT DC-DC REG PWR SUPPLY MODULE, PLASTIC, MSOP-8, Power Supply Module

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