Texas Instruments TPS60400, TPS60401, TPS60402, TPS60403 Unregulated 60-mA Charge Pump Voltage Inverter Data Sheet User Manual

查询C2012X5R1A225M供应商 TPS60400, TPS60401, TPS60402, TPS60403

UNREGULATED 60-m A CHARGE PUMP VOLTAGE INVERTER

SLVS324 – JULY 2001

features applications Inverts Input Supply Voltage LCD Bias Up to 60-m A Output Current Ga As Bias for RF Power Amps Only Three Small 1-µF Ceramic Capacitors Sensor Supply in Portable Instruments Needed

Bipolar Amplifier Supply

Input Voltage Range From 1.6 V to 5.5 V

Medical Instruments

Power Save-Mode for Improved Efficiency

Battery-Operated Equipment

at Low Output Currents (TPS60400)

DBV PACKAGE

Device Quiescent Current Typical 100 µA

(TOP VIEW)

Integrated Active Schottky-Diode for

Start-Up Into Load 1OUT CFLY+

Small 5-Pin SOT23 Package

Evaluation Module Available TPS60400EVM–178 GND

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 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 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.

tp Vo lt ag

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 250-k Hz fixed frequency operation are available. One device comes with a variable switching frequency to reduce operating current in applications with a wide load range and enables the design with low-value capacitors.

typical application circuit

TPS60400 OUTPUT VOLTAGE vs INPUT VOLTAGE

C(fly) 1 µF

IO = 60 m A

IO = 30 m A

CFLY+ –1

CFLY–

IO = 1 m A

TPS60400 Output

Input

OUTIN –2

–1.6 V to –5 V,

1.6 V to 5.5 V

CI CO Max 60 m A

TA = 25°C –5

VI – Input Voltage – V

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. Copyright  2001, Texas Instruments Incorporated

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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