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SP828

High Efficiency Voltage Inverters

Signal Processing Technologies 

SIGNAL PROCESSING EXCELLENCE

SP828/829

High Efficiency Voltage Inverters

s 99.9% Voltage Conversion Efficiency

s +1.5V to +5.5V Input Voltage Range

s +1.25 VIN Guaranteed Start-up

s Inverts Input Supply Voltage

s Low EMI Voltage Inverter

s 50µA Quiescent Current for the SP828

s 130µA Quiescent Current for the SP829

s 25mA Output Current

s Indefinite Output Short Circuit to GND

s Low 20Ω Output Resistance

s 12kHz Operating Frequency for the SP828

s 35kHz Operating Frequency for the SP829

s Pin Compatible Enhancement to

MAX 828/829, TC828/829

s 5-pin SOT23 Package

DESCRIPTION

The SP828/829 devices are CMOS Charge Pump Voltage Inverters that can be

implemented in designs requiring a negative voltage from a +5V supply. The SP828/829

devices are ideal for both battery-powered and board level voltage conversion

applications with a typical operating current of 50µA for the SP828 and 130µA for the SP829.

Both devices can output 25mA with a voltage drop of 500mV. These devices combine a low

quiescent current with high efficiency (>95% over most of its load-current range). The SP828/829

provide a stable operating frequency, low output resistance and low EMI to enhance performance

of critical analog circuitry. The SP828/829 devices are available in a space-saving 5-pin

SOT23 Package.

VOUT 1

VIN 2

C1- 3

SP828

SP829

5 C1+

4 GND

SP828DS/03

SP828/829 High Efficiency Voltage Inverters

1

© Copyright 1999 Sipex Corporation

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