Overview
The TPS73501DRBT is a 500-mA, low quiescent current, low noise, high power-supply rejection ratio (PSRR) low-dropout linear regulator produced by Texas Instruments. This device is designed to offer high performance with ultra-low current consumption, making it suitable for a variety of applications, including portable devices, radio frequency (RF) systems, and precision analog circuits. The TPS73501DRBT features a PMOS pass transistor that achieves a very low dropout voltage of 280 mV at 500 mA, and it is stable with ceramic capacitors. The regulator includes thermal and overcurrent protection and is fully specified over a temperature range of –40°C to +125°C.
Key Specifications
| Parameter | Min | Typ | Max | Unit |
|---|---|---|---|---|
| Input Voltage | 2.7 | 6.5 | V | |
| Output Voltage Range (Adjustable) | 1.25 | 6 | V | |
| Output Current | 500 | mA | ||
| Quiescent Current (IQ) | 45 | μA | ||
| PSRR at 1 kHz | 68 | dB | ||
| Noise (RMS) | 13.2 | μV | ||
| Dropout Voltage at 500 mA | 280 | mV | ||
| Start-Up Time | 45 | μs | ||
| Output Capacitor | 2.2 | μF | ||
| Package Types | WSON-6, SON-8 |
Key Features
- Low Quiescent Current: The TPS73501DRBT has a typical quiescent current of 45 μA, making it energy-efficient for battery-powered devices.
- High PSRR: The regulator offers a high power-supply rejection ratio of 68 dB at 1 kHz, ensuring minimal noise from the power supply.
- Low Noise: With an RMS noise of 13.2 μV, this regulator is suitable for precision analog and RF applications.
- Fast Start-Up Time: The device features a fast start-up time of 45 μs, which is enhanced by a quick-start circuit.
- Stable with Ceramic Capacitors: The TPS73501DRBT is stable with a 2.2-μF, low-ESR ceramic output capacitor.
- Excellent Load and Line Transient Response: The regulator provides excellent transient response performance, reducing overshoot and undershoot.
- Thermal and Overcurrent Protection: Built-in thermal and overcurrent protection ensure reliable operation under various conditions.
- Adjustable Output Voltage: The adjustable version allows output voltage settings from 1.25 V to 6 V.
Applications
- Post DC-DC Converter Ripple Filtering: The TPS73501DRBT can be used to filter ripple from DC-DC converters, providing a clean output voltage.
- IP Network Cameras: Suitable for powering IP network cameras due to its low noise and high PSRR.
- Macro Base Stations: Used in macro base stations for their high performance and reliability.
- Thermostats: Ideal for thermostat applications requiring stable and low-noise voltage regulation.
- Portable Devices: The low quiescent current and high performance make it suitable for various portable devices.
Q & A
- What is the input voltage range of the TPS73501DRBT?
The input voltage range is from 2.7 V to 6.5 V.
- What is the typical quiescent current of the TPS73501DRBT?
The typical quiescent current is 45 μA.
- What is the maximum output current of the TPS73501DRBT?
The maximum output current is 500 mA.
- What is the PSRR of the TPS73501DRBT at 1 kHz?
The PSRR at 1 kHz is 68 dB.
- What type of capacitors is the TPS73501DRBT stable with?
The regulator is stable with ceramic capacitors, specifically a 2.2-μF, low-ESR output capacitor.
- What is the dropout voltage of the TPS73501DRBT at 500 mA?
The dropout voltage at 500 mA is 280 mV.
- Does the TPS73501DRBT have built-in thermal and overcurrent protection?
Yes, the device includes thermal and overcurrent protection.
- What is the start-up time of the TPS73501DRBT?
The start-up time is 45 μs.
- Can the output voltage of the TPS73501DRBT be adjusted?
Yes, the adjustable version allows output voltage settings from 1.25 V to 6 V.
- What are some common applications of the TPS73501DRBT?
Common applications include post DC-DC converter ripple filtering, IP network cameras, macro base stations, thermostats, and portable devices.
