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NCP1729SN35T1
Switched Capacitor Voltage Inverter with Shutdown
NCP1729
Switched Capacitor
Voltage Inverter
The NCP1729 is a CMOS charge pump voltage inverter that is
designed for operation over an input voltage range of 1.15 V to 5.5 V
with an output current capability in excess of 50 mA. The operating
current consumption is only 122 �A, and a power saving shutdown
input is provided to further reduce the current to a mere 0.4 �A. The
device contains a 35 kHz oscillator that drives four low resistance
MOSFET switches, yielding a low output resistance of 26 � and a
voltage conversion efficiency of 99%. This device requires only two
external 3.3��F capacitors for a complete inverter making it an ideal
solution for numerous battery powered and board level applications.
The NCP1729 is available in the space saving TSOP−6 package.
Features Operating Voltage Range of 1.15 V to 5.5 V Output Current Capability in Excess of 50 mA Low Current Consumption of 122 �A Power Saving Shutdown Input for a Reduced Current of 0.4 �A Operation at 35 kHz Low Output Resistance of 26 � Space Saving TSOP−6 Package Pb−Free Package is Available
Typical Applications LCD Panel Bias Cellular Telephones Pagers Personal Digital Assistants Electronic Games Digital Cameras Camcorders Hand Held Instruments
Figure 1. Typical Application−Vout
Vin
This device contains 77 active transistors.
