TPS60400

Features:

 Inverts Input Supply Voltage
 Up to 60-mA Output Current
 Only Three Small 1-F Ceramic Capacitors Needed
 Input Voltage Range From 1.6 V to 5.5 V
 PowerSave-Mode for Improved Efficiency at Low Output Currents (TPS60400)
 Device Quiescent Current Typical 100 A
 Integrated Active Schottky-Diode for Start-Up Into Load
 Small 5-Pin SOT23 Package
 Evaluation Module Available TPS60400EVM178


Application

 LCD Bias
 GaAs Bias for RF Power Amps
 Sensor Supply in Portable Instruments
 Bipolar Amplifier Supply
 Medical Instruments
 Battery-Operated Equipment


Pinout




Specifications

Voltage range: IN to GND . . . . . . . . . . . . . . . . . . . . 0.3 V to 5.5 V
OUT to GND  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5.0 V to 0.3 V
CFLY to GND. . . . . . . . . . . . . . . . . . . . . . . . . 0.3 V to (V_O 0.3 V)
CFLY+ to GND. . . . . . . . . . . . . . . . . . . . . . .. . 0.3 V to (V_I + 0.3 V)
Continuous power dissipation . . . . . . See Dissipation Rating Table
Continuous output current . . . . . . . . . . . . . . . . . . . . . . . . . . 80 mA
Storage temperature range, T_stg . . . . . . . . . . . 55°C to 150°C
Maximum junction temperature, T_J . . . . . . . . . . . . . . . . . . . 150°C


Description

The TPS60400 is a family of devices that generate an unregulated negative output voltage from an input voltage ranging from 1.6 V to 5.5 V. The devices are typically supplied by a preregulated supply rail of 5 V or 3.3 V. Due to its wide input voltage range, two or three NiCd, NiMH, or alkaline battery cells, as well as one Li-Ion cell can also power them.

Only three external 1-F capacitors are required to build a complete dc/dc charge pump inverter. Assembled in a 5-pin SOT23 package, the complete converter TPS60400 can be built on a 50 mm2 board area.Additional board area and component count reduction is achieved by replacing the Schottky diode that is typically needed for start-up into load by integrated circuitry.