TPS6040x Unregulated 60-mA Charge Pump Voltage Inverter

1 Features

• Inverts Input Supply Voltage

• Up to 60-mA Output Current

• Only Three Small 1-µF 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 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

• GaAs Bias for RF Power Amps

• Sensor Supply in Portable Instruments

• Bipolar Amplifier Supply

• Medical Instruments

• Battery-Operated Equipment

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 NiCd, NiMH, 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 SOT-23 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.

TPS60400 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.

Device Information

PART NUMBER

PACKAGE (1)

BODY SIZE (NOM)

TPS6040x

SOT-23 (5)

2.90 mm x 1.60 mm

(1)

For all available packages, see the orderable addendum at

the end of the datasheet.

TPS60400

CFLY-

CFLY+

3

5

OUT

IN

GND

1

2

4

CI

1 µF

CO

1 µF

Output

-1.6 V to -5.5 V,

Max 60 mA

Input

1.6 V to 5.5 V

C(fly)

1 µF

Typical Application

- 5

- 4

- 3

- 2

- 1

0

0

1

2

3

4

5

IO = 60 mA

IO = 30 mA

IO = 1 mA

TA = 25°C

VI - Input Voltage - V

Output Voltage vs Input Voltage

www.ti.com

TPS60400, TPS60401, TPS60402, TPS60403

SLVS324C – JULY 2001 – REVISED OCTOBER 2020

Copyright © 2020 Texas Instruments Incorporated

Submit Document Feedback

1

Product Folder Links: TPS60400 TPS60401 TPS60402 TPS60403

TPS60400, TPS60401, TPS60402, TPS60403

SLVS324C – JULY 2001 – REVISED OCTOBER 2020

An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,

intellectual property matters and other important disclaimers. PRODUCTION DATA.