Overview
The TPS65131RGET from Texas Instruments is a dual-output DC-DC converter that generates both a positive and a negative output. This device is designed to provide a positive output up to 15 V and a negative output down to –15 V, making it suitable for applications requiring split-rail power supplies. The converter operates with an input voltage range of 2.7 V to 5.5 V, allowing it to be powered from batteries or fixed voltage rails. It features a fixed frequency PWM control topology and a power-save mode that uses pulse-skipping at light-load currents, ensuring high efficiency and low quiescent current of 500 µA. The device is packaged in a compact 4-mm × 4-mm VQFN-24 package, making it ideal for space-constrained designs.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Package | VQFN-24 (RGE) | |
| Pins | 24 | |
| Operating Temperature Range | -40 to 85 | °C |
| Input Voltage Range | 2.7 to 5.5 | V |
| Positive Output Voltage | Up to 15 | V |
| Negative Output Voltage | Down to –15 | V |
| Switch Current Limit Options | 0.8 A, 2 A | |
| Conversion Efficiency | Up to 89% (Positive), Up to 81% (Negative) | % |
| Quiescent Current | 500 µA | |
| Shutdown Current | 1 µA | |
| Switching Frequency | 1.25 MHz (typical) |
Key Features
- Adjustable positive and negative output voltages up to 15 V and down to –15 V, respectively.
- Two switch current limit options: 0.8 A and 2 A.
- High conversion efficiency: up to 89% for the positive output and up to 81% for the negative output.
- Control output for external P-channel FET to support complete disconnection from the battery.
- Individual enable inputs for flexible output sequencing.
- Protection features including overvoltage protection, input undervoltage lockout, and thermal shutdown protection.
- Low quiescent current of 500 µA and shutdown current of 1 µA.
- Compact 4-mm × 4-mm VQFN-24 package.
Applications
The TPS65131RGET is suitable for various applications requiring dual, positive and negative voltage rails. These include:
- Portable electronics and battery-powered devices.
- Industrial control systems and automation.
- Medical devices requiring multiple voltage levels.
- Aerospace and defense systems.
- Any system needing efficient, compact, and reliable split-rail power supplies.
Q & A
- What is the input voltage range of the TPS65131RGET?
The input voltage range is from 2.7 V to 5.5 V.
- What are the maximum positive and negative output voltages of the TPS65131RGET?
The maximum positive output voltage is up to 15 V, and the maximum negative output voltage is down to –15 V.
- What are the switch current limit options for the TPS65131RGET?
The switch current limit options are 0.8 A and 2 A.
- What is the typical quiescent current of the TPS65131RGET?
The typical quiescent current is 500 µA.
- Does the TPS65131RGET have built-in protection features?
Yes, it includes overvoltage protection, input undervoltage lockout, and thermal shutdown protection.
- What is the package type and size of the TPS65131RGET?
The device is packaged in a 4-mm × 4-mm VQFN-24 package.
- What is the operating temperature range of the TPS65131RGET?
The operating temperature range is from –40°C to 85°C.
- Is the TPS65131RGET RoHS compliant?
Yes, the device is RoHS compliant).
- What is the typical switching frequency of the TPS65131RGET?
The typical switching frequency is 1.25 MHz).
- Does the TPS65131RGET support flexible output sequencing?
Yes, it has individual enable inputs for flexible output sequencing).
