LTC1517-5 datasheet(1/8 Pages) LINER

Part #	LTC1517-5

Description	Micropower, Regulated 5V Charge Pump in a 5-Pin SOT-23 Package

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Manufacturer	LINER [Linear Technology]

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LTC1517-5

TYPICAL APPLICATION

Micropower, Regulated

5V Charge Pump in a

5-Pin SOT-23 Package

s

Ultralow Power: ICC = 6µA Typ

s

Short-Circuit/Thermal Protected

s

5V

±4% Regulated Output

s

VIN Range: 2.7V to 5V

s

Output Current: 10mA (VIN ≥ 2.7V)

20mA (VIN ≥ 3V)

s

No Inductors

s

Ultrasmall Application Circuit (0.045in2)

s

800kHz Switching Frequency

s

Available in 5-Pin SOT-23

FEATURES

DESCRIPTION

The LTC

®1517-5 is a micropower charge pump DC/DC

converter that produces a regulated 5V output. The input

voltage range is 2.7V to 5V. Extremely low operating current

(typically 6

µAwithnoload)andlowexternalpartscount(one

0.1

µFflyingcapacitorandtwosmallbypasscapacitorsatVIN

and VOUT) make the part ideally suited for small, light load

battery-powered applications. The total printed circuit board

area of the application circuit shown below is only 0.045in2.

The part operates as a Burst Mode

TM switched-capacitor

voltage doubler to produce a regulated output. The part has

thermal shutdown capability and can survive a continuous

short circuit from VOUT to GND. The device is available in a

5-pin SOT-23 package.

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

Burst Mode is a trademark of Linear Technology Corporation.

OUTPUT CURRENT (mA)

0

5.0

5.1

80

1517 TA02

4.9

4.8

20

40

60

5.2

VIN = 3.3V

VIN = 3V

VIN = 2.7V

TA = 25°C

C1 = 0.1

µF

COUT = 6.8µF

Typical Output Voltage vs Output Current

3.3

µF

1517 TA01

12

3

4

5

0.1

µF

6.8

µF

VOUT = 5V ± 4%

IOUT = 10mA (VIN ≥ 2.7V)

IOUT = 20mA (VIN ≥ 3V)

VIN

2.7V TO 5V

VIN

GND

LTC1517-5

VOUT

C1+

C1–

s

Cellular Telephones

s

Battery-Operated Equipment

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Local Power Supplies

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Handheld Instruments

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PCMCIA Supplies

APPLICATIONS

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