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ICL828

Switched-Capacitor Voltage Inverter

Intersil 

TM

Data Sheet

ICL828

June 2000 File Number 4835.1

Switched-Capacitor Voltage Inverter

The ICL828 IC performs supply voltage conversions from

positive to negative for an input range of +1.5V to +5.5V

resulting in complementary output voltages of -1.5V to -5.5V.

The ICL828 has a 12kHz internal oscillator and requires two

capacitors to invert the supply voltage. Cascading may be

made to increase the output voltage. The high efficiency

(greater than 90% over most of the load-current range) and

low operating current (60µA typical) make these devices

ideal for both battery-powered and board-level voltage

conversion applications.

Ordering Information

PART

TEMP.

NUMBER RANGE (oC) PACKAGE PKG. NO BRAND

ICL828IH-T -40 to 85 5 Lead SOT23 P5.064 828

Block Diagram

NEGATIVE VOLTAGE CONVERTER

OUTPUT

VOLTAGE

INPUT

VOLTAGE

OUT

1

+

IN

2

C1+

5

+

3

C1-

4

GND

Features

• 5-Lead SOT23-5 Package

• 99% Open Circuit Voltage Conversion Efficiency

• Inverts Input Supply Voltage

• High Power Supply Efficiency

• Input Voltage Range . . . . . . . . . . . . . . . . . . +1.5V to +5.5V

• May be Cascaded to Increase Output Voltage

• Output Current . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25mA

• Quiescent Current . . . . . . . . . . . . . . . . . . . . . . . . . . 60µA

• Pin for Pin Compatible to MAX828

• Small Package Size

Applications

• Simple Conversion . . . . . . . . . . . . . . . . . . . . . +5V to -5V

• Voltage Multiplication . . . . . . . . . . . . . . . . . . VOUT = -nVIN

• Supply Splitter

- Operational Amplifiers

- Bias Supplies

• Hand Held Products

- Cell Phones

- PDAs

- GPS

- Pagers

• LCD Panels

Pinout

ICL828 (SOT23)

TOP VIEW

OUT 1

IN 2

C1- 3

5 C1+

4 GND

1

CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.

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