Overview
The TPS7A4701RGWR is a high-performance, low-noise, low-dropout linear voltage regulator (LDO) from Texas Instruments. This device is part of the TPS7A47 family and is designed to provide a clean and stable voltage supply, making it ideal for high-accuracy and high-precision instrumentation applications. The TPS7A4701RGWR can source up to 1 A of output current and operates over an input voltage range of +3 V to +36 V. It features ultralow noise of 4 µV RMS and high power-supply rejection ratio (PSRR) of up to 82 dB at 100 Hz and greater than 55 dB from 10 Hz to 10 MHz.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Input Voltage Range | +3 V to +36 V | V |
| Output Voltage Range (ANY-OUT™ Version) | +1.4 V to +20.5 V | V |
| Output Voltage Range (Adjustable Version) | +1.4 V to +34 V | V |
| Output Current | 1 A | A |
| Dropout Voltage | 307 mV at 1 A | mV |
| Output Noise Voltage | 4 µV RMS (10 Hz, 100 kHz) | µV |
| Power-Supply Rejection Ratio (PSRR) | 82 dB (100 Hz), > 55 dB (10 Hz, 10 MHz) | dB |
| Operating Temperature Range | -40°C to 125°C | °C |
| Package | VQFN (RGW), 20 pins | |
| Thermal Shutdown Temperature | 170°C | °C |
Key Features
- Ultralow noise of 4 µV RMS (10 Hz, 100 kHz)
- High power-supply rejection ratio (PSRR) of up to 82 dB at 100 Hz and greater than 55 dB from 10 Hz to 10 MHz
- Two output voltage modes: ANY-OUT™ (user-programmable via PCB layout) and adjustable (with external feedback resistors)
- No external feedback resistors or feed-forward capacitors required for ANY-OUT™ version
- CMOS logic level-compatible enable pin
- Built-in fixed current limit and thermal shutdown
- Available in a high-performance thermal package: 5-mm × 5-mm QFN
Applications
The TPS7A4701RGWR is ideal for high-accuracy and high-precision instrumentation applications where clean voltage rails are critical. These include:
- Powering operational amplifiers, analog-to-digital converters (ADCs), and digital-to-analog converters (DACs)
- Post dc-dc converter regulation to filter out output voltage ripple inherent to dc-dc switching conversions
- Medical, radio frequency (RF), and test-and-measurement applications
- Sensitive instrumentation, audio, and RF applications
Q & A
- What is the input voltage range of the TPS7A4701RGWR?
The input voltage range is +3 V to +36 V.
- What are the output voltage ranges for the TPS7A4701RGWR?
The output voltage range for the ANY-OUT™ version is +1.4 V to +20.5 V, and for the adjustable version, it is +1.4 V to +34 V.
- What is the maximum output current of the TPS7A4701RGWR?
The maximum output current is 1 A.
- What is the dropout voltage of the TPS7A4701RGWR at 1 A?
The dropout voltage is 307 mV at 1 A.
- What is the output noise voltage of the TPS7A4701RGWR?
The output noise voltage is 4 µV RMS (10 Hz, 100 kHz).
- What is the power-supply rejection ratio (PSRR) of the TPS7A4701RGWR?
The PSRR is up to 82 dB at 100 Hz and greater than 55 dB from 10 Hz to 10 MHz.
- How is the output voltage programmed in the ANY-OUT™ version of the TPS7A4701RGWR?
The output voltage is programmed using the PCB layout without external resistors or feed-forward capacitors.
- What are the thermal shutdown and reset temperatures for the TPS7A4701RGWR?
The thermal shutdown temperature is 170°C, and the reset temperature is 150°C.
- What package type and size does the TPS7A4701RGWR come in?
The device comes in a VQFN (RGW) package with 20 pins and a size of 5-mm × 5-mm.
- What are some typical applications for the TPS7A4701RGWR?
Typical applications include powering operational amplifiers, ADCs, DACs, and other high-performance analog circuitry in medical, RF, and test-and-measurement applications.
