Overview
The TPS73025DBVT is a low-dropout (LDO) linear voltage regulator from Texas Instruments, designed for use in noise-sensitive, battery-operated equipment. This device is part of the TPS730 family, which is optimized for low noise, high power-supply rejection ratio (PSRR), and fast start-up times. The TPS73025DBVT is available in a small SOT-23 package, making it ideal for portable applications such as handsets and PDAs.
Key Specifications
| Parameter | Typical Value | Minimum Value | Maximum Value | Unit |
|---|---|---|---|---|
| Input Voltage Range | 2.7 | 2.7 | 5.5 | V |
| Output Voltage | 2.5 | 2.45 | 2.55 | V |
| Continuous Output Current | 200 | 0 | 200 | mA |
| Dropout Voltage | 120 | 120 | 210 | mV |
| Power-Supply Rejection Ratio (PSRR) | 68 | - | - | dB at 100 Hz |
| Output Noise | 33 | - | - | μVRMS |
| Start-Up Time | 50 | - | - | μs |
| Enable Input Voltage (High) | 1.7 | 1.7 | VIN | V |
| Enable Input Voltage (Low) | 0.7 | 0 | 0.7 | V |
| Junction Temperature Range | -40 to 125 | -40 | 125 | °C |
Key Features
- High PSRR (68 dB at 100 Hz) for excellent power-supply rejection.
- Low output noise (33 μVRMS) for noise-sensitive applications.
- Fast start-up time (50 μs) for quick power-on.
- Very low dropout voltage (120 mV at 200 mA) for efficient power management.
- Stable with a small 2.2-μF ceramic capacitor on the output.
- Enable input to reduce supply currents to less than 1 μA when the regulator is turned off.
- Internal current limiting and thermal protection for device safety.
- Optional noise reduction pin to filter internal bandgap noise.
Applications
The TPS73025DBVT is suitable for a variety of applications, particularly in noise-sensitive and battery-operated devices. These include:
- Handsets and mobile phones.
- Personal Digital Assistants (PDAs).
- Portable audio and video devices.
- Wireless communication devices.
- Medical devices requiring low noise and high stability.
Q & A
- What is the typical output voltage of the TPS73025DBVT?
The typical output voltage is 2.5 V. - What is the maximum continuous output current of the TPS73025DBVT?
The maximum continuous output current is 200 mA. - What is the dropout voltage of the TPS73025DBVT at 200 mA output current?
The dropout voltage is typically 120 mV at 200 mA. - How does the enable pin function on the TPS73025DBVT?
The enable pin is active high. The device is enabled when the EN pin exceeds 1.7 V and disabled when it drops below 0.7 V. - What is the power-supply rejection ratio (PSRR) of the TPS73025DBVT?
The PSRR is 68 dB at 100 Hz. - What is the typical start-up time of the TPS73025DBVT?
The typical start-up time is 50 μs. - How does the noise reduction pin function on the TPS73025DBVT?
The noise reduction pin, when connected to an external capacitor, filters noise generated by the internal bandgap, improving power-supply rejection and reducing output noise. - What is the junction temperature range for the TPS73025DBVT?
The junction temperature range is from -40°C to 125°C. - What type of capacitor is recommended for the output of the TPS73025DBVT?
A small 2.2-μF ceramic capacitor is recommended for stability. - Does the TPS73025DBVT have internal current limiting and thermal protection?
Yes, the device features internal current limiting and thermal protection for safety.
