Overview
The TPS79133DBVR is a low-dropout linear voltage regulator produced by Texas Instruments. This device is part of the TPS791 series, known for its ultralow noise, high power-supply rejection ratio (PSRR), and fast start-up times. The TPS79133DBVR is specifically designed to provide a fixed output voltage of 3.3V with a maximum output current of 100mA. It is ideal for applications requiring low noise and high stability, such as powering voltage-controlled oscillators (VCOs), phase-locked loops (PLLs), Bluetooth devices, and wireless LAN components.
Key Specifications
| Parameter | Value |
|---|---|
| Output Voltage | 3.3V (Fixed) |
| Output Current | 100mA |
| Input Voltage Range | 2.7V to 5.5V |
| Dropout Voltage | 38 mV at 100 mA (typical) |
| Noise Voltage | 15 µVRMS (BW = 100 Hz to 100 kHz) |
| PSRR | 70 dB to 75 dB (depending on frequency and output current) |
| Start-Up Time | Approximately 63 µs with a 0.001-µF bypass capacitor |
| Quiescent Current | 170 µA (typical) |
| Standby Current | < 1 µA |
| Package | SOT23-5 |
| RoHS Compliance | Yes |
Key Features
- Ultralow noise output (15 µVRMS) and high PSRR (70 dB to 75 dB)
- Fast start-up time of approximately 63 µs
- Very low dropout voltage of 38 mV at full load
- Stable operation with a small 1-µF ceramic capacitor on the output
- Low quiescent current of 170 µA and standby current of less than 1 µA
- Enable pin for power management
- Compact SOT23-5 package
Applications
- Powering VCOs and PLLs in RF circuits
- Bluetooth and wireless LAN devices
- Portable and battery-operated electronics
- Analog components that are noise-sensitive, such as in portable RF electronics
Q & A
- What is the output voltage of the TPS79133DBVR? The output voltage is fixed at 3.3V.
- What is the maximum output current of the TPS79133DBVR? The maximum output current is 100mA.
- What is the input voltage range for the TPS79133DBVR? The input voltage range is from 2.7V to 5.5V.
- What is the dropout voltage of the TPS79133DBVR? The dropout voltage is approximately 38 mV at 100 mA.
- How much noise does the TPS79133DBVR produce? The noise voltage is 15 µVRMS over a bandwidth of 100 Hz to 100 kHz.
- What is the PSRR of the TPS79133DBVR? The PSRR ranges from 70 dB to 75 dB depending on frequency and output current.
- How long does it take for the TPS79133DBVR to start up? The start-up time is approximately 63 µs with a 0.001-µF bypass capacitor.
- What is the quiescent current of the TPS79133DBVR? The quiescent current is typically 170 µA.
- Is the TPS79133DBVR RoHS compliant? Yes, the TPS79133DBVR is RoHS compliant.
- In what package is the TPS79133DBVR available? The TPS79133DBVR is available in a SOT23-5 package.
