Overview
The TPS79533DCQRG4 is a part of the TPS795 family of low-dropout (LDO) linear voltage regulators produced by Texas Instruments. This device is known for its ultralow noise, high power-supply rejection ratio (PSRR), and fast start-up time, making it suitable for a variety of noise-sensitive applications. The TPS79533DCQRG4 is available in a 3-mm × 3-mm VSON package and is stable with a small 1-µF ceramic capacitor on the output.
Key Specifications
| Parameter | Minimum | Typical | Maximum | Unit |
|---|---|---|---|---|
| Output Current | 0 | - | 500 | mA |
| Output Voltage Range (Adjustable) | 1.225 | - | 5.5 | V |
| Output Voltage Accuracy | -2% | - | 2% | VOUT(nom) |
| Line Regulation | 0.05 | 0.12 | - | %/V |
| Load Regulation | - | 3 | - | mV |
| Dropout Voltage | 105 | - | 160 | mV |
| Power-Supply Rejection Ratio (PSRR) at 10 kHz | - | 50 | - | dB |
| Output Noise Voltage (33 µVRMS with 0.1 µF CNR) | - | 33 | - | µVRMS |
| Start-Up Time | - | 50 | - | µs |
| Enable Voltage (High) | 1.7 | - | VIN | V |
| Enable Voltage (Low) | 0.7 | - | - | V |
| Operating Junction Temperature | -40 | - | 125 | °C |
Key Features
- 500-mA low-dropout regulator with enable
- Available in fixed and adjustable (1.2-V to 5.5-V) versions
- High PSRR (50 dB at 10 kHz)
- Ultralow noise (33 µVRMS with 0.1 µF CNR)
- Fast start-up time (approximately 50 µs)
- Stable with a small 1-µF ceramic capacitor
- Excellent load and line transient response
- Low dropout voltage (105 mV at full load)
- Available in 6-pin SOT-223 and 3-mm × 3-mm VSON packages
Applications
- RF: VCOs, receivers, ADCs
- Audio applications
- Bluetooth, wireless LAN
- Cellular and cordless telephones
- Handheld organizers, PDAs
Q & A
- What is the maximum output current of the TPS79533DCQRG4?
The maximum output current is 500 mA.
- What is the typical output noise voltage of the TPS79533DCQRG4?
The typical output noise voltage is 33 µVRMS with a 0.1 µF CNR.
- What is the power-supply rejection ratio (PSRR) at 10 kHz for the TPS79533DCQRG4?
The PSRR at 10 kHz is 50 dB.
- What is the start-up time of the TPS79533DCQRG4?
The start-up time is approximately 50 µs.
- What are the package options for the TPS79533DCQRG4?
The device is available in 6-pin SOT-223 and 3-mm × 3-mm VSON packages.
- What is the operating junction temperature range for the TPS79533DCQRG4?
The operating junction temperature range is -40°C to 125°C.
- What is the dropout voltage of the TPS79533DCQRG4 at full load?
The dropout voltage at full load is 105 mV.
- Is the TPS79533DCQRG4 stable with a small ceramic capacitor?
Yes, it is stable with a small 1-µF ceramic capacitor.
- What are some common applications for the TPS79533DCQRG4?
Common applications include RF, audio, Bluetooth, wireless LAN, cellular and cordless telephones, and handheld organizers.
- How does the enable pin function on the TPS79533DCQRG4?
Driving the enable pin (EN) high turns on the regulator, while driving it low puts the regulator into shutdown mode.
