Overview
The TPS7A4701RGWT, produced by Texas Instruments, is a high-performance, positive voltage, ultralow-noise Low-Dropout (LDO) voltage regulator. This device is part of the TPS7A470x family, designed with bipolar technology to cater to high-accuracy and high-precision instrumentation applications. It is capable of sourcing a 1-A load and features an input voltage range of 3 V to 36 V. The TPS7A4701 is particularly suited for applications where clean voltage rails are critical, such as powering operational amplifiers, analog-to-digital converters (ADCs), digital-to-analog converters (DACs), and other high-performance analog circuitry.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Input Voltage Range | 3 to 36 | V |
| Output Voltage Range (ANY-OUT™ Version) | 1.4 to 20.5 | V |
| Output Voltage Range (Adjustable Version) | 1.4 to 34 | V |
| Output Current | 1 | A |
| Output Voltage Noise (10 Hz to 100 kHz) | 4 | µVRMS |
| Power-Supply Ripple Rejection (PSRR) at 100 Hz | 82 | dB |
| Dropout Voltage at 1 A | 307 | mV |
| Operating Junction Temperature Range | -40 to 125 | °C |
| Thermal Shutdown Temperature | 170 | °C |
Key Features
- Ultralow Noise: 4 µVRMS output voltage noise from 10 Hz to 100 kHz.
- High PSRR: Power-supply ripple rejection of up to 82 dB at 100 Hz.
- Programmable Output Voltage: ANY-OUT™ version allows user-programmable output voltage via PCB layout without external resistors or feed-forward capacitors.
- Adjustable Output Voltage: Adjustable version allows output voltage adjustment up to 34 V using external feedback resistors.
- High Current Capability: Capable of sourcing up to 1 A of output current.
- Thermal Protection: Built-in fixed current limit and thermal shutdown.
- CMOS Logic Level-Compatible Enable Pin: Allows for easy enable/disable control.
- High-Performance Thermal Package: Available in a 5-mm × 5-mm QFN package.
Applications
- Instrumentation and Medical Devices: Ideal for powering high-precision analog circuitry.
- Radio Frequency (RF) Applications: Suitable for RX, TX, and PA circuitry due to its low noise and high PSRR.
- Test and Measurement Equipment: Ensures maximum system performance by filtering out dc-dc converter output ripple.
- Audio Applications: Provides clean voltage rails essential for high-quality audio systems.
- Post DC-DC Converter Regulation: Effective in filtering out voltage ripple inherent to dc-dc switching conversions.
Q & A
- What is the input voltage range of the TPS7A4701?
The input voltage range is from 3 V to 36 V.
- What is the output voltage noise of the TPS7A4701?
The output voltage noise is 4 µVRMS from 10 Hz to 100 kHz.
- How can the output voltage of the TPS7A4701 be programmed?
The output voltage can be programmed using the ANY-OUT™ version via PCB layout or adjusted up to 34 V using external feedback resistors.
- What is the maximum output current of the TPS7A4701?
The maximum output current is 1 A.
- What is the dropout voltage of the TPS7A4701 at 1 A?
The dropout voltage at 1 A is 307 mV.
- Does the TPS7A4701 have thermal protection features?
Yes, it has built-in fixed current limit and thermal shutdown.
- What is the operating junction temperature range of the TPS7A4701?
The operating junction temperature range is from -40°C to 125°C.
- What type of package is the TPS7A4701 available in?
The TPS7A4701 is available in a 5-mm × 5-mm QFN package.
- What are some typical applications of the TPS7A4701?
Typical applications include instrumentation, medical devices, RF applications, test and measurement equipment, and audio applications.
- How does the TPS7A4701 improve system performance in sensitive applications?
The TPS7A4701 improves system performance by providing ultralow noise and high PSRR, which are critical for high-precision analog circuitry.
