Overview
The TPS73025DBVTG4 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 TPS73025DBVTG4 offers a fixed output voltage of 2.5V and is available in a DBV package.
Key Specifications
| Parameter | Test Conditions | Min | Typ | Max | Unit |
|---|---|---|---|---|---|
| Input Voltage Range (VIN) | 2.7 | 5.5 | V | ||
| Continuous Output Current (IOUT) | 0 | 200 | mA | ||
| Output Voltage (VOUT) | 0 µA ≤ IOUT ≤ 200 mA, 2.75 V ≤ VIN ≤ 5.5 V | 2.45 | 2.5 | 2.55 | V |
| Output Voltage Accuracy | 0 µA ≤ IOUT ≤ 200 mA, 2.75 V ≤ VIN ≤ 5.5 V | -2% | 2% | % | |
| Dropout Voltage (VDO) | IOUT = 200 mA | 120 | 210 | mV | |
| Power-Supply Rejection Ratio (PSRR) | f = 100 Hz, IOUT = 200 mA, TJ = 25°C | 68 | dB | ||
| Output Noise | BW = 200 Hz to 100 kHz, IOUT = 200 mA | 33 | μVRMS | ||
| Start-Up Time | RL = 14 Ω, COUT = 1 µF, CNR = 0.001 µF | 50 | μs | ||
| Enable Input Voltage (VEN) | 2.7 V ≤ VIN ≤ 5.5 V | 0.7 | 1.7 | V | |
| Shutdown Current (ISHUTDOWN) | VEN = 0 V, 2.7 V ≤ VIN ≤ 5.5 V | 0.07 | 1 | μA |
Key Features
- Low dropout voltage: 120 mV to 210 mV at 200 mA output current.
- High power-supply rejection ratio (PSRR): 68 dB at 100 Hz.
- Ultra-low output noise: 33 μVRMS from 200 Hz to 100 kHz.
- Low quiescent current: 170 μA typically.
- Enable input to reduce supply currents to less than 1 μA when the regulator is turned off.
- Internal current limiting and thermal protection.
- Undervoltage lockout (UVLO) circuit to prevent unpredictable behavior at low input voltages.
- Fast start-up time: 50 μs with appropriate capacitors.
Applications
The TPS73025DBVTG4 is suitable for a variety of applications, including:
- Noise-sensitive, battery-operated equipment such as audio devices, medical devices, and wireless communication systems.
- Portable electronics requiring low noise and high PSRR.
- Systems needing fast start-up times and low dropout voltages.
- Applications requiring low quiescent current to extend battery life.
Q & A
- What is the input voltage range for the TPS73025DBVTG4?
The input voltage range is from 2.7 V to 5.5 V.
- What is the fixed output voltage of the TPS73025DBVTG4?
The fixed output voltage is 2.5 V.
- What is the maximum continuous output current?
The maximum continuous output current is 200 mA.
- What is the typical quiescent current of the TPS73025DBVTG4?
The typical quiescent current is 170 μA.
- How does the enable input function?
The enable pin (EN) 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 TPS73025DBVTG4?
The PSRR is 68 dB at 100 Hz.
- What is the output noise of the TPS73025DBVTG4?
The output noise is 33 μVRMS from 200 Hz to 100 kHz.
- What is the start-up time of the TPS73025DBVTG4?
The start-up time is typically 50 μs with appropriate capacitors.
- Does the TPS73025DBVTG4 have internal current limiting and thermal protection?
Yes, it features internal current limiting and thermal protection.
- What is the recommended layout practice for improving PSRR and noise performance?
Separate ground planes for VIN and VOUT, connected only at the GND pin of the device, and placing capacitors close to the device on the same side of the PCB are recommended.
