Overview
The TPS746-Q1, specifically the TPS74611PQWDRVRQ1, is a 1-A ultra-low-dropout regulator (LDO) designed by Texas Instruments. This device is AEC-Q100 qualified for automotive applications, ensuring reliability over a wide temperature range from -40°C to +125°C. 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 regulator is known for its low quiescent current and fast line and load transient performance, making it suitable for various automotive and industrial applications.
Key Specifications
| Parameter | Minimum | Typical | Maximum | Unit |
|---|---|---|---|---|
| VIN Input Voltage | 1.5 | 6.0 | V | |
| VOUT Output Voltage (Adjustable) | 0.55 | 5.5 | V | |
| VOUT Output Voltage (Fixed) | 0.65 | 5.0 | V | |
| IOUT Output Current | 0 | 1 | A | |
| CIN Input Capacitor | 1 | µF | ||
| COUT Output Capacitor | 1 | 220 | µF | |
| TJ Junction Temperature | -40 | 150 | °C | |
| RθJA Junction-to-Ambient Thermal Resistance (WSON 6-pin) | 80.3 | °C/W | ||
| RθJA Junction-to-Ambient Thermal Resistance (VSON 8-pin) | 55.5 | °C/W |
Key Features
- Ultra-low dropout voltage regulator with power-good functionality.
- Low quiescent current and fast line and load transient performance.
- Externally adjustable output voltage range from 0.55 V to 5.5 V, and fixed output voltages for common voltage rails.
- Stable with small ceramic output capacitors, allowing for a compact solution size.
- Precision band-gap and error amplifier providing high accuracy of ±0.85% (max) at 25°C and ±1.5% (max) over temperature.
- Integrated thermal shutdown, current limit, and undervoltage lockout (UVLO) features.
- Internal foldback current limit to reduce thermal dissipation during short-circuit events.
- EN input and PG output for sequencing multiple power supplies.
- Available in open-drain and push-pull topologies for the power-good output.
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 of the TPS746-Q1 is from 1.5 V to 6.0 V.
- What is the adjustable output voltage range of the TPS746-Q1?
The adjustable output voltage range is from 0.55 V to 5.5 V.
- What are the package options for the TPS746-Q1?
The device is available in a 6-pin, 2-mm × 2-mm WSON package and an 8-pin, 3-mm × 3-mm VSON package.
- What is the maximum output current of the TPS746-Q1?
The maximum output current is 1 A.
- Does the TPS746-Q1 have built-in protection features?
Yes, it includes integrated thermal shutdown, current limit, and undervoltage lockout (UVLO) features.
- How does the power-good (PG) output function?
The PG output monitors the voltage at the feedback pin to indicate the status of the output voltage and can be used for sequencing multiple power supplies.
- What is the junction temperature range for the TPS746-Q1?
The junction temperature range is from -40°C to +150°C.
- What are the thermal resistance values for the different packages?
The junction-to-ambient thermal resistance is 80.3°C/W for the 6-pin WSON package and 55.5°C/W for the 8-pin VSON package.
- Is the TPS746-Q1 stable with small ceramic output capacitors?
Yes, the device is stable with small ceramic output capacitors, allowing for a compact solution size.
- What is the accuracy of the output voltage over temperature?
The output voltage accuracy is ±0.85% (max) at 25°C and ±1.5% (max) over temperature.
