60mA Charge Pump Voltage Inverter with Variable Switching Frequency


Recommended alternative parts

  • TPS62120  -  The device has similar functionality with a wider input voltage range, higher output current, and output voltage regulation. See SLVA478.


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.


  • Inverts Input Supply Voltage
  • Up to 60-mA Output Current
  • Only Three Small 1-µF Ceramic Capacitors
  • 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

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Parametrics Compare all products in Buck/Boost or Inverting Charge Pump (Inductorless)

Vin (Min) (V)
Vin (Max) (V)
Vout (Min) (V)
Vout (Max) (V)
Iout (Max) (A)
Switching Frequency (Min) (kHz)
Switching Frequency (Max) (kHz)
Iq (Typ) (mA)
Operating Temperature Range (C)
Package Group
TPS60400 TPS60401 TPS60402 TPS60403
Inverting    Inverting    Inverting    Inverting   
1.6    1.6    1.6    1.6   
5.5    5.5    5.5    5.5   
-1.6    -1.6    -1.6    -1.6   
-5.25    -5.25    -5.25    -5.25   
0.06    0.06    0.06    0.06   
30    13    30    150   
450    25    80    400   
0.125    0.07    0.275    0.4   
N/A    N/A    N/A    N/A   
-40 to 85    -40 to 85    -40 to 85    -40 to 85   
Catalog    Catalog    Catalog    Catalog   
SOT-23    SOT-23    SOT-23    SOT-23   

Other qualified versions of TPS60400

Version Part Number Definition
Automotive TPS60400-Q1 Q100 devices qualified for high-reliability automotive applications targeting zero defects