Overview
The TPS65120RGTR is a single-inductor quadruple-output DC-DC converter designed by Texas Instruments. This component is specifically tailored for powering amorphous-silicon (a-Si) and low-temperature poly-silicon (LTPS) TFT-LCD displays. It uses a free-running variable peak current PWM control scheme to generate independently-regulated positive and negative outputs, ensuring high efficiency and fast response to line and load transients. The device features a compact layout, utilizing a single inductor and offering a complete 1 mm component profile solution, making it ideal for space-constrained applications.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Input Voltage Range | 2.5 to 5.5 | V |
| Main Output (VMAIN) Voltage Range | 3.0 to 5.6 | V |
| Main Output (VMAIN) Current | 25 | mA |
| Main Output (VMAIN) Ripple | 5 | mVPP |
| Main Output (VMAIN) Accuracy | ±0.8% | |
| Positive Output (VGH) Voltage Range | Up to 20 | V |
| Positive Output (VGH) Current | 2 | mA |
| Positive Output (VGH) Accuracy | ±3% | |
| Negative Output (VGL) Voltage Range | Down to -18 | V |
| Negative Output (VGL) Current | 2 | mA |
| Negative Output (VGL) Accuracy | ±3% | |
| Auxiliary Linear Regulator Output | 1.8 V / 3.3 V | V |
| Efficiency | Up to 83% | |
| Operating Temperature Range | -40 to 85 | °C |
| Package Type | 16-Pin QFN (3 × 3 × 0.9 mm) |
Key Features
- Single-inductor quadruple-output design for positive and negative voltages and an auxiliary linear regulator.
- Main output (VMAIN) adjustable from 3.0 V to 5.6 V with ±0.8% typical accuracy and low ripple (5 mVPP).
- Positive output (VGH) adjustable up to 20 V with ±3% typical accuracy.
- Negative output (VGL) adjustable down to -18 V with ±3% typical accuracy.
- Auxiliary 1.8 V / 3.3 V linear regulator for LCD logic circuitry.
- Automatic or programmable power sequencing.
- Complete 1 mm component profile solution.
- Output short circuit protection.
- Internal soft-start circuit to limit inrush current during startup.
- High efficiency up to 83%.
Applications
- Small form factor a-Si and LTPS TFT LCD displays.
- Cell phones and smartphones.
- PDAs and pocket PCs.
- Portable DVD players.
- Digital still cameras and camcorders.
- Handheld instruments.
- Portable GPS devices.
- Car navigation systems.
Q & A
- What is the input voltage range of the TPS65120RGTR?
The input voltage range is from 2.5 V to 5.5 V.
- What are the adjustable voltage ranges for the main output (VMAIN)?
The main output voltage can be adjusted from 3.0 V to 5.6 V.
- What is the typical accuracy of the main output (VMAIN)?
The typical accuracy is ±0.8%.
- What are the positive and negative output voltage ranges?
The positive output (VGH) can be adjusted up to 20 V, and the negative output (VGL) can be adjusted down to -18 V.
- Does the TPS65120RGTR have built-in protection features?
Yes, it includes output short circuit protection and internal current limiting for high reliability under fault conditions.
- What is the efficiency of the TPS65120RGTR?
The efficiency can be up to 83%.
- What type of package does the TPS65120RGTR come in?
The device comes in a 16-Pin QFN package (3 × 3 × 0.9 mm).
- What is the operating temperature range of the TPS65120RGTR?
The operating temperature range is from -40°C to 85°C.
- Does the TPS65120RGTR support power sequencing?
Yes, it supports automatic or programmable power sequencing.
- What is the purpose of the auxiliary linear regulator in the TPS65120RGTR?
The auxiliary linear regulator provides 1.8 V or 3.3 V for the LCD logic circuitry.
