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.
| Type | Title | Date | ||
|---|---|---|---|---|
| * | Data sheet | TPS6040x Unregulated 60-mA Charge Pump Voltage Inverter datasheet (Rev. C) | PDF | HTML | 10 Nov 2020 |
| Application note | Quick Reference Guide To TI Buck Switching DC/DC Application Notes (Rev. B) | PDF | HTML | 23 May 2022 | |
| Application note | Performing Accurate PFM Mode Efficiency Measurements (Rev. A) | 11 Dec 2018 | ||
| Selection guide | Power Management Guide 2018 (Rev. R) | 25 Jun 2018 | ||
| Technical article | Low-noise charge pumps make it easy to create negative voltages | PDF | HTML | 30 Aug 2017 | |
| Application note | Extending the Soft Start Time Without a Soft Start Pin (Rev. B) | 15 Jun 2017 | ||
| Analog Design Journal | Design considerations for a resistive feedback divider in a DC/DC converter | 26 Apr 2012 | ||
| EVM User's guide | TPS60400EVM-178 for Evaluating TPS6040x Charge Pump Devices | 07 Aug 2001 |
For additional terms or required resources, click any title below to view the detail page where available.
Need for use: The EVM does not contain any components. The pcb therefore first has to be populated with the appropriate components. A description of different applications that can be tested using the EVM can be found in the TPS60400EVM users guide. Samples of the TPS6040x family can be (...)
| Package | Pins | CAD symbols, footprints & 3D models |
|---|---|---|
| SOT-23 (DBV) | 5 | Ultra Librarian |
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