TPS60400_15 Datasheet, PDF (1/29 Pages) Texas Instruments – TPS6040x Unregulated 60-mA Charge Pump Voltage Inverter

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TPS60400, TPS60401
TPS60402, TPS60403
SLVS324B – JULY 2001 – REVISED APRIL 2015
TPS6040x Unregulated 60-mA Charge Pump Voltage Inverter
1 Features
•1 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⁽¹⁾
PART NUMBER
PACKAGE
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.
Input
1.6 V to 5.5 V _CI
1 µF
Typical Application
C_(fly) 1 µF
3
5
C_FLY- C_FLY+
2
IN
TPS60400
OUT
1
GND
4
C_O
1 µF
Output
-1.6 V to -5.5 V,
Max 60 mA
Output Voltage vs Input Voltage
0
I_O = 60 mA
-1
I_O = 30 mA
I_O = 1 mA
-2
-3
-4
T_A = 25°C
-5
0
1
2
3
4
5
V_I - Input Voltage - V
1
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.