Overview
The TPS7A2050PDQNR, produced by Texas Instruments, is a 300mA ultra-low-noise, low-IQ, low-dropout (LDO) linear regulator. This device is part of the TPS7A20 family and is designed to provide high performance in noise-sensitive applications. It features an ultra-low output voltage noise of 7 μV RMS, eliminating the need for a noise-bypass capacitor. The regulator also boasts a high power supply rejection ratio (PSRR) of 95 dB at 1 kHz and a very low quiescent current of 6.5 μA, making it ideal for battery-powered devices and other applications where power efficiency is crucial.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Input Voltage Range | 1.6 V to 6.0 V | V |
| Output Voltage Range | 0.8 V to 5.5 V | V |
| Output Voltage Tolerance | ±1.5% (max) | % |
| Output Current | 300 mA | A |
| Dropout Voltage | -140 mV (max) at 300 mA (VOUT = 3.3 V) | mV |
| Output Voltage Noise | 7 μV RMS | μV |
| PSRR at 1 kHz | 95 dB | dB |
| Quiescent Current | 6.5 μA | μA |
| Packages | X2SON, DSBGA, SOT-23 | - |
Key Features
- Ultra-low output voltage noise of 7 μV RMS, no noise-bypass capacitor required.
- High power supply rejection ratio (PSRR) of 95 dB at 1 kHz.
- Very low quiescent current of 6.5 μA.
- Input voltage range from 1.6 V to 6.0 V and output voltage range from 0.8 V to 5.5 V.
- Low dropout voltage, typically 140 mV at 300 mA.
- Smart enable input with an internally controlled pulldown resistor.
- Stable with a minimum 1-μF ceramic output capacitor.
- Internal soft-start to reduce inrush current.
- Active output discharge feature when the device is disabled.
- Thermal shutdown protection.
Applications
The TPS7A2050PDQNR is suitable for a variety of applications requiring low noise and high power supply rejection ratio, such as:
- RF and other sensitive analog circuits.
- Battery-powered devices where low quiescent current is essential.
- Portable electronics and handheld devices.
- Medical devices and diagnostic equipment.
- Aerospace and defense systems requiring high reliability and low noise.
Q & A
- What is the output current capability of the TPS7A2050PDQNR?
The TPS7A2050PDQNR can source up to 300 mA of output current.
- What is the input voltage range for the TPS7A2050PDQNR?
The input voltage range is from 1.6 V to 6.0 V.
- What is the typical quiescent current of the TPS7A2050PDQNR?
The typical quiescent current is 6.5 μA.
- Does the TPS7A2050PDQNR require a noise-bypass capacitor?
No, it does not require a noise-bypass capacitor due to its ultra-low output voltage noise of 7 μV RMS.
- What is the PSRR of the TPS7A2050PDQNR at 1 kHz?
The PSRR is 95 dB at 1 kHz.
- What are the available packages for the TPS7A2050PDQNR?
The device is available in X2SON, DSBGA, and SOT-23 packages.
- How does the smart enable feature work on the TPS7A2050PDQNR?
The smart enable feature has an internally controlled pulldown resistor that keeps the LDO disabled when the EN pin is floating and enables the output when the EN pin voltage exceeds the enable rising threshold.
- What is the dropout voltage of the TPS7A2050PDQNR?
The dropout voltage is typically 140 mV at 300 mA output current.
- Does the TPS7A2050PDQNR have thermal shutdown protection?
- What type of capacitors are recommended for stability and good load transient response?
A minimum 1-μF ceramic input capacitor and a minimum 1-μF ceramic output capacitor are recommended.
