LTC1516 datasheet(1/8 Pages) LINER

部件名	LTC1516

功能描述	Micropower, Regulated 5V Charge Pump DC/DC Converter

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制造商	LINER [Linear Technology]

网页	http://www.linear.com

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LTC1516

Micropower, Regulated

5V Charge Pump

DC/DC Converter

The LTC

®1516 is a micropower charge pump DC/DC

converter that produces a regulated 5V output from a 2V

to 5V supply. Extremely low supply current (12

µA typical

with no load, < 1

µA in shutdown) and low external parts

count (two 0.22

µF flying capacitors and two 10µF capaci-

tors at VIN and VOUT) make the LTC1516 ideally suited for

small, light load battery-powered applications. Typical

efficiency (VIN = 3V) exceeds 70% with load currents

between 50

µA and 50mA. Modulating the SHDN pin keeps

the typical efficiency above 70% with load currents all the

way down to 10

µA.

The LTC1516 operates as either a doubler or a tripler

depending on VIN and output load conditions to improve

overall efficiency. The part has thermal shutdown and can

survive a continuous short from VOUT to GND. In shut-

down the load is disconnected from VIN.

The LTC1516 is available in an 8-pin SO package in both

commercial and industrial temperature grades.

s

Ultralow Power: Typical Operating ICC = 12µA

s

Short Circuit/Thermal Protection

s

Regulated 5V

±4% Output

s

2V to 5V Input Range

s

No Inductors

s

ICC in Shutdown: <1µA

s

Output Current: 20mA (VIN > 2V)

50mA (VIN > 3V)

s

Shutdown Disconnects Load from VIN

s

Internal Oscillator: 600kHz

s

Compact Application Circuit (0.1 in2)

s

8-Pin SO Package

FEATURES

DESCRIPTION

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

Figure 1. Regulated 5V Output from a 2V to 5V Input

Efficiency vs Output Current

APPLICATIONS

s

2-Cell to 5V Conversion

s

Li-Ion Battery Backup Supplies

s

Local 3V to 5V Conversion

s

5V Flash Memory Programmer

s

Smart Card Readers

TYPICAL APPLICATION

1

2

3

4

8

7

6

5

C1–

SHDN

GND

C2–

C1+

VIN

VOUT

C2+

LTC1516

0.22

µF

ON/OFF

10

µF

10

µF

VOUT = 5V ±4%

IOUT = 0mA TO 20mA, VIN ≥ 2V

IOUT = 0mA TO 50mA, VIN ≥ 3V

0.22

µF

VIN = 2V TO 5V

+

1516 • F01

OUTPUT CURRENT (mA)

50

60

70

80

90

100

1516 • TA01

0.01

0.1

1

10

SHDN = 0V

VIN = 3V

LOW IQ MODE

(SEE FIGURE 3)

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