Overview
The TPS745-Q1, produced by Texas Instruments, is a 500-mA ultra-low-dropout linear regulator (LDO) designed for automotive and other high-reliability applications. This device is AEC-Q100 qualified, ensuring it meets stringent automotive standards. It is available in small packages, including a 6-pin, 2-mm × 2-mm WSON and an 8-pin, 3-mm × 3-mm VSON, both with wettable flanks for optical inspection. The TPS745-Q1 features a wide input voltage range of 1.5 V to 6.0 V and supports both fixed and adjustable output voltages from 0.55 V to 5.5 V. It includes power-good functionality, low quiescent current, and high accuracy, making it suitable for various automotive and industrial applications.
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 | 500 | mA | |
| Dropout Voltage (VDO) | 160 | mV (at 500 mA, 3.3 VOUT) | ||
| Quiescent Current (IQ) | 25 | 1.5 (shutdown) | μA | |
| Operating Junction Temperature (TJ) | -40 | 150 | °C | |
| Thermal Resistance (RθJA) | 80.3 (WSON), 55.5 (VSON) | °C/W |
Key Features
- AEC-Q100 qualified for automotive applications with a temperature grade 1: –40°C to +125°C.
- Ultra-low dropout voltage of 160 mV (max) at 500 mA (3.3 VOUT).
- High power supply rejection ratio (PSRR) of 45 dB at 100 kHz.
- Output voltage accuracy of ±0.85% (25°C), ±1.5% maximum over temperature.
- Power-good output options: open-drain and push-pull.
- Low quiescent current: 25 μA (typical), 1.5 μA (shutdown).
- Active output discharge and integrated thermal shutdown, current limit, and undervoltage lockout (UVLO).
- Functional Safety-Capable with documentation available to aid functional safety system design.
- Stable with small ceramic output capacitors (1 μF or larger).
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 TPS745-Q1? The input voltage range is from 1.5 V to 6.0 V.
- What are the available output voltage options for the TPS745-Q1? The device supports fixed output voltages from 0.65 V to 5.0 V and adjustable output voltages from 0.55 V to 5.5 V.
- What is the maximum output current of the TPS745-Q1? The maximum output current is 500 mA.
- What is the dropout voltage of the TPS745-Q1 at 500 mA and 3.3 VOUT? The dropout voltage is 160 mV (max) at 500 mA and 3.3 VOUT.
- Is the TPS745-Q1 AEC-Q100 qualified? Yes, it is AEC-Q100 qualified for automotive applications.
- What are the package options for the TPS745-Q1? The device is available in 6-pin, 2-mm × 2-mm WSON and 8-pin, 3-mm × 3-mm VSON packages.
- What is the thermal resistance of the WSON and VSON packages? The thermal resistance is 80.3°C/W for the WSON package and 55.5°C/W for the VSON package.
- Does the TPS745-Q1 have power-good functionality? Yes, it has power-good output options in both open-drain and push-pull configurations.
- What is the quiescent current of the TPS745-Q1 in typical and shutdown modes? The typical quiescent current is 25 μA, and in shutdown mode, it is 1.5 μA.
- Is the TPS745-Q1 stable with small ceramic capacitors? Yes, it is stable with ceramic output capacitors of 1 μF or larger.
