LTC1044A

1

1044afa

For more information www.linear.com/LTC1044A

Typical applicaTion

FeaTures

DescripTion

12V CMOS

Voltage Converter

Generating –10V from 10V

applicaTions

n

1.5V to 12V Operating Supply Voltage Range

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13V Absolute Maximum Rating

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200µA Maximum No Load Supply Current at 5V

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Boost Pin (Pin 1) for Higher Switching Frequency

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97% Minimum Open Circuit Voltage Conversion

Efficiency

n

95% Minimum Power Conversion Efficiency

n

n

High Voltage Upgrade to ICL7660/LTC1044

n

Conversion of 10V to ±10V Supplies

n

Conversion of 5V to ±5V Supplies

n

n

n

n

Automotive Applications

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Battery Systems with 9V Wall Adapters/Chargers

L

, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks of Linear

Technology Corporation. All other trademarks are the property of their respective owners.

The LTC®1044A is a monolithic CMOS switched-capacitor

voltage converter. It plugs in for ICL7660/LTC1044 in

applications where higher input voltage (up to 12V) is

needed. The LTC1044A provides several conversion func-

tions without using inductors. The input voltage can be

To optimize performance in specific applications, a boost

functionisavailabletoraisetheinternaloscillatorfrequency

by a factor of seven. Smaller external capacitors can be

used in higher frequency operation to save board space.

The internal oscillator can also be disabled to save power.

The supply current drops to 1.5µA at 5V input when the

1

2

3

4

8

7

6

5

LTC1044A

OSC

LV

BOOST

GND

+

10µF

10µF

10V INPUT

–10V OUTPUT

1044a TA01a

LOAD CURRENT (mA)

0

–4

–2

0

40

1044a TA01b

–6

–8

–5

–3

–1

–7

–9

–10

10 20 30

50 60 70 80 90 100

C1 = C2 = 10µF

SLOPE = 45