Overview
The TPS746-Q1, produced by Texas Instruments, is a 1-A ultra-low-dropout regulator (LDO) designed for high-performance and reliability in various applications. This device is AEC-Q100 qualified for automotive use, ensuring it meets stringent temperature and operational requirements. It is available in small 6-pin and 8-pin packages (WSON and VSON, respectively) with wettable flanks, facilitating optical inspection. The TPS746-Q1 features low quiescent current, fast line and load transient performance, and is stable with small ceramic output capacitors, making it ideal for compact solution designs.
Key Specifications
| Parameter | Minimum | Typical | Maximum | Unit |
|---|---|---|---|---|
| Input Voltage (VIN) | 1.5 | 6.0 | V | |
| Output Voltage (VOUT) - Fixed | 0.65 | 5.0 | V | |
| Output Voltage (VOUT) - Adjustable | 0.55 | 5.5 | V | |
| Output Current (IOUT) | 0 | 1 | A | |
| Output Accuracy at 25°C | -0.85% | 0.85% | % | |
| Output Accuracy over Temperature | -1.5% | 1.5% | % | |
| Dropout Voltage (VDO) at 1 A | 265 mV (max at 3.3 VOUT) | mV | ||
| Quiescent Current (IQ) | 25 μA | μA | ||
| Junction Temperature Range | -40 | 150 | °C | |
| Thermal Resistance (RθJA) - WSON | 80.3 | °C/W | ||
| Thermal Resistance (RθJA) - VSON | 55.5 | °C/W |
Key Features
- AEC-Q100 qualified for automotive applications with a temperature grade of -40°C to +125°C.
- Ultra-low dropout voltage of 265 mV (max) at 1 A (3.3 VOUT).
- High power supply rejection ratio (PSRR) of 38 dB at 100 kHz.
- Output accuracy of ±0.85% typical and ±1.5% maximum over temperature.
- Power-good output options: open-drain or push-pull.
- Active output discharge and integrated thermal shutdown, current limit, and undervoltage lockout (UVLO).
- Functional Safety-Capable with documentation available to aid in functional safety system design.
- Low quiescent current and stable operation with small ceramic output capacitors.
Applications
- Automotive head units
- Front and rear cameras
- Automotive cluster displays
- Telematics control units
- Medium and short-range radar systems
Q & A
- What is the input voltage range of the TPS746-Q1?
The input voltage range is from 1.5 V to 6.0 V.
- What are the available output voltage ranges for the TPS746-Q1?
The fixed output voltage range is from 0.65 V to 5.0 V, and the adjustable output voltage range is from 0.55 V to 5.5 V.
- What is the maximum output current of the TPS746-Q1?
The maximum output current is 1 A.
- What is the typical quiescent current of the TPS746-Q1?
The typical quiescent current is 25 μA.
- What are the package options for the TPS746-Q1?
The device is available in 2-mm × 2-mm WSON and 3-mm × 3-mm VSON packages with wettable flanks.
- Does the TPS746-Q1 have power-good functionality?
Yes, it has power-good output options in open-drain and push-pull topologies.
- What is the thermal resistance of the WSON and VSON packages?
The thermal resistance for the WSON package is 80.3°C/W, and for the VSON package, it is 55.5°C/W.
- Is the TPS746-Q1 suitable for automotive applications?
Yes, it is AEC-Q100 qualified for automotive applications.
- What safety features does the TPS746-Q1 include?
The device includes integrated thermal shutdown, current limit, and undervoltage lockout (UVLO) features.
- Can the TPS746-Q1 be used in functional safety systems?
Yes, it is Functional Safety-Capable with available documentation to aid in functional safety system design.
