Packaging information
| Package | Pins VQFN (RGE) | 24 |
| Operating temperature range (°C) -40 to 85 |
| Package qty | Carrier 250 | SMALL T&R |
Features for the TPS65131
- Input voltage range: 2.7-V to 5.5-V
- VPOS positive boost converter output
- Adjustable output: up to 15 V
- Two switch current limit options: 0.8 A and 2 A
- Conversion efficiency: up to 89%
- VNEG negative inverting buck-boost converter output
- Adjustable output: down to –15 V
- Two switch current limit options: 0.8 A and 2 A
- Conversion efficiency: up to 81%
- Control output for external P-channel FET supports complete disconnection from battery
- 1-µA shutdown current
- Individual enable inputs for flexible output sequencing
- Protection features
- Overvoltage protection at VPOS and VNEG
- Input undervoltage lockout
- Thermal shutdown protection
- 4-mm × 4-mm VQFN-24 package (RGE)
Description for the TPS65131
The TPS6513x device is a dual-output DC-DC converter supply that generates a positive output up to 15 V and a negative output down to –15 V. The converter maintains low output voltage ripple. Typically, the maximum output currents are in the 200-mA to 500-mA range, depending on input voltage to output voltage ratio and the current limit option. The combined (VPOS and VNEG) efficiency reaches 85% to keep systems cool or achieve a longer battery-on-time. The input voltage range of 2.7 V to 5.5 V allows the devices to be powered from batteries or from fixed 3.3-V or 5-V rails.
The converter operates with a fixed frequency PWM control topology and, when operating in power-save mode, uses a pulse-skipping mode at light-load currents. It operates with only 500-µA device quiescent current.
Independent enable pins allow flexible power-up and power-down sequencing for both outputs. The positive and negative outputs operate independently, allowing for non-symmetrical output voltages and currents.
The converter has an internal current limit, overvoltage protection, and a thermal shutdown for highest reliability under fault conditions. The converter is available in a 4-mm × 4-mm VQFN-24 package. The solution size is small with a minimum switching frequency of 1.25 MHz for smaller inductors and few other external components required.