TPS60402| Datasheet

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TPS60400, TPS60401, TPS60402, TPS60403 UNREGULATED 60 mA CHARGE PUMP VOLTAGE INVERTER
SLVS324A - JULY 2001 REVISED NOVEMBER 2004

features

applications

D Inverts Input Supply Voltage D Up to 60-mA Output Current D Only Three Small 1-uF Ceramic Capacitors
Needed

D Input Voltage Range From 1.6 V to 5.5 V D PowerSave-Mode for Improved Efficiency D D D D
at Low Output Currents (TPS60400) Device Quiescent Current Typical 65 uA Integrated Active Schottky-Diode for Start-Up Into Load Small 5-Pin SOT23 Package Evaluation Module Available TPS60400EVM-178

D D D D D D

LCD Bias GaAs Bias for RF Power Amps Sensor Supply in Portable Instruments Bipolar Amplifier Supply Medical Instruments Battery-Operated Equipment
DBV PACKAGE (TOP VIEW) OUT IN CFLY- 1 2 3 4 GND 5 CFLY+

description
The TPS6040x 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-uF capacitors are required to build a complete dc/dc charge pump inverter. Assembled in a 5-pin SOT23 package, the complete converter 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. The TPS6040x can deliver a maximum output current of 60 mA with a typical conversion efficiency of greater than 90% over a wide output current range. Three device options with 20-kHz, 50-kHz, and 250-kHz fixed frequency operation are available. One device comes with a variable switching frequency to r
educe operating current in applications with a wide load range and enables the design with low-value capacitors.

typical application circuit
TPS60400

C(fly) 3 CFLY- Input 1.6 V to 5.5 V 2 CI 1 uF IN

1 uF 5
V O - Output Voltage - V

OUTPUT VOLTAGE vs INPUT VOLTAGE
0 IO = 60 mA -1 IO = 30 mA IO = 1 mA -2

CFLY+ OUT 1 CO 1 uF Output -1.6 V to -5.5 V, Max 60 mA

TPS60400 GND 4

-3

-4 TA = 25 C -5 0 1 2 3 4 VI - Input Voltage - V 5

Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
PRODUCTION DATA information is current as of publication date. Products conform to specifications per the terms of Texas Instruments standard warranty. Production processing does not necessarily include testing of all parameters.

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