1

LTC1044A

12V CMOS

Voltage Converter

DESCRIPTIO

S

FEATURE

S

APPLICATI

s

1.5V to 12V Operating Supply Voltage Range

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13V Absolute Maximum Rating

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200

µA 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

s

95% Minimum Power Conversion Efficiency

s

+

s

High Voltage Upgrade to ICL7660/LTC1044

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Conversion of 10V to

±10V Supplies

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Conversion of 5V to

±5V Supplies

s

s

s

s

Automotive Applications

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Battery Systems with 9V Wall Adapters/Chargers

The LTC1044A 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

function is available to raise the internal oscillator fre-

quency by a factor of 7. 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 1.5

µA at 5V input when the

APPLICATI

TYPICAL

Generating – 10V from 10V

LOAD CURRENT (mA)

0

–4

–2

0

40

LTC1044A • TA02

–6

–8

–5

–3

–1

–7

–9

–10

10 20 30

50 60 70 80 90 100

C1 = C2 = 10

µF

SLOPE = 45

Ω

1

2

3

4

8

7

6

5

LTC1044A

OSC

LV

BOOST

GND

+

10

µF

10

µF

10V INPUT

–10V OUTPUT

LTC1044A • TA01