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LTEC

更新时间： 2024-11-12 05:44:03

品牌	Logo	应用领域
凌特 - Linear		转换器泵
页数	文件大小	规格书
8页	167K
描述
Single Cell to 3.3V Regulated Charge Pump DC/DC Converter

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中文翻译

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数据手册

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LTEC 数据手册

LTC1502-3.3

Single Cell to 3.3V

Regulated Charge Pump

DC/DC Converter

FEATURES

DESCRIPTIO

The LTC^®1502-3.3 is a quadrupler charge pump DC/DC

converter that produces a regulated 3.3V output from a

singlealkalinecellinput. Itrequiresonlyfivesmallexternal

capacitors—no inductors are required. Low supply cur-

rent(40µAtypical, 5µAinshutdown)andminimalexternal

components make the LTC1502-3.3 ideal for space and

powerconscioussingle-cellapplications.Thetotalprinted

circuit board area of the circuit shown below is less than

0.125in².

Forcing the C1^–/SHDN pin low through an external resis-

tive pull-down puts the part into shutdown mode. During

shutdown, the internal oscillator is stopped and the load is

disconnected from V_IN. An internal pull-up current on the

C1^–/SHDN pin forces the part back into normal operation

once the pull-down resistance is removed.

■

Input Voltage Range: 0.9V to 1.8V

■

0.9V Guaranteed Start-Up Voltage

■

Regulated Output Voltage: 3.3V ±4%

■

Output Current: 10mA (V_IN≥ 1V)

■

No Inductors

■

Shutdown Disconnects Load from V_IN

■

Low Operating Current: 40µA

Low Shutdown Current: 5µA

■

Short-Circuit and Overtemperature Protected

Application Circuit Fits in <0.125in²PCB Area

■

Available in 8-Pin MSOP and SO Packages

APPLICATIO S

■

Pagers

■

Battery Backup Supplies

The LTC1502-3.3 is short-circuit protected and survives

an indefinite V_OUTshort to ground. The LTC1502-3.3 is

available in 8-pin MSOP and SO packages.

■

Portable Electronic Equipment

■

Handheld Medical Instruments

■

Glucose Meters

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

TYPICAL APPLICATIO

Single Cell to 3.3V DC/DC Converter

Output Voltage vs Input Voltage

3.5

T = 25°C

= 3.3V

OUT

= 10mA

10µF

3.4

3.3

3.2

3.1

3.0

1µF

LTC1502-3.3

C1 /SHDN C3

1µF

–

GND

SINGLE CELL

NiCd or

ALKALINE

10µF

= 10mA

= 15mA

OUT

1502-3.3 TA01

PCB LAYOUT FITS IN <0.125IN²

0.8

1.0

1.2

1.4

1.6

1.8

INPUT VOLTAGE (V)

1502-3.3 TA02

12 3 4 5 6 7 8

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