TPS60402 Datasheet | Texas Instruments

Features - Inverts Input Supply Voltage - Up to 60-m A Output Current - Only Three Small 1-µF Ceramic Capacitors Needed - Input Voltage Range From 1.6 V to 5.5 V - Power Save-Mode for Improved Efficiency at Low- Output Currents (TPS60400) - Device Quiescent Current Typical 65 µA - Integrated Active Schottky-Diode for Start-up Into Load - Small 5-Pin SOT-23 Package - Evaluation Module Available TPS60400EVM-178 2 Applications - LCD Bias - Ga As Bias for RF Power Amps - Sensor Supply in Portable Instruments - Bipolar Amplifier Supply - Medical Instruments - Battery-Operated Equipment Input 1.6 V to 5.5 V CI 1 µF C(fly) 1 µF CFLY- CFLY+ TPS60400 OUT GND 4 CO 1 µF Output -1.6 V to -5.5 V, Max 60 m A Typical Application 3 Description The TPS6040x family of devices generates 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 Ni Cd, Ni MH, or alkaline battery cells, as well as one Li-Ion cell can also power them. Only three external 1-µF capacitors are required to build a plete DC-DC charge pump inverter. Assembled in a 5-pin SOT-23 package, the plete converter can be built on a 50-mm2 board area. Additional board area and ponent count reduction is achieved by replacing the Schottky diode that is typically needed for start-up into load by integrated circuitry. The TPS6040x can deliver a maximum output current of 60 m A with a typical conversion efficiency of greater than 90% over a wide output current range. Three device options with 20-k Hz, 50-k Hz, and 250k Hz fixed-frequency operation are available. TPS60400 es with a variable switching frequency to reduce operating current in applications with a wide load range and enables the design with low-value capacitors. Device Information PART NUMBER PACKAGE...