Overview
The TPS79633DCQRG4 is a high-performance, ultralow-noise, low-dropout linear voltage regulator from Texas Instruments. This device is part of the TPS796 family, known for its high power-supply rejection ratio (PSRR), fast start-up time, and excellent line and load transient responses. The TPS79633DCQRG4 is available in a 3 × 3 mm VSON package and is suitable for applications requiring low noise and high stability.
Key Specifications
| Parameter | Min | Typ | Max | Unit |
|---|---|---|---|---|
| Input Voltage (VIN) | 2.7 | 5.5 | V | |
| Output Current (IOUT) | 0 | 1 | A | |
| Operating Junction Temperature (TJ) | -40 | 125 | °C | |
| Output Voltage Accuracy (Fixed VOUT < 5 V) | -2% | 2% | ||
| Line Regulation (ΔVO/ΔVI) | 0.05 | 0.12 | %/V | |
| Load Regulation (ΔVO/ΔIO) | 5 | mV | ||
| Dropout Voltage (VDO) at IOUT = 1 A | 220 | 325 | mV | |
| Power-Supply Rejection Ratio (PSRR) at 10 kHz | 53 | dB | ||
| Output Noise Voltage (Vn) at 1 A | 40 | μVRMS | ||
| Start-Up Time | 50 | μs | ||
| Shutdown Current (ISHDN) | 0.07 | 1 | μA |
Key Features
- Ultralow Noise: The TPS79633DCQRG4 exhibits approximately 40 μVRMS of output voltage noise, making it suitable for noise-sensitive applications.
- High PSRR: High power-supply rejection ratio of 53 dB at 10 kHz ensures excellent supply rejection.
- Fast Start-Up Time: Quick start-up time of approximately 50 μs with a 0.001-μF bypass capacitor.
- Low Dropout Voltage: Very low dropout voltage of 220 mV to 325 mV at full load.
- Stable Operation: Stable with a small, 1-μF ceramic capacitor on the output.
- Thermal and Overcurrent Protection: Fully specified from –40°C to 125°C with thermal and overcurrent protection.
- Low Quiescent Current: Typical quiescent current of 265 μA, reducing to less than 1 μA in shutdown mode.
- Compact Packaging: Available in a 3 × 3 mm VSON package.
Applications
- RF Electronics: Suitable for applications such as VCOs, receivers, and ADCs due to its high PSRR and low noise.
- Audio and Bluetooth/Wireless LAN: Ideal for audio and wireless communication devices requiring low noise and fast response times.
- Cellular and Cordless Telephones: Used in handheld telecommunication devices where low noise and high stability are crucial.
- Handheld Organizers and PDAs: Suitable for portable devices that require efficient and stable power supply.
Q & A
- What is the input voltage range for the TPS79633DCQRG4?
The input voltage range is from 2.7 V to 5.5 V.
- What is the maximum output current of the TPS79633DCQRG4?
The maximum output current is 1 A.
- What is the typical output noise voltage of the TPS79633DCQRG4?
The typical output noise voltage is approximately 40 μVRMS.
- How long does the TPS79633DCQRG4 take to start up?
The start-up time is approximately 50 μs with a 0.001-μF bypass capacitor.
- What is the dropout voltage of the TPS79633DCQRG4 at full load?
The dropout voltage ranges from 220 mV to 325 mV at full load.
- Is the TPS79633DCQRG4 protected against thermal and overcurrent conditions?
Yes, it has thermal and overcurrent protection and is fully specified from –40°C to 125°C.
- What is the quiescent current of the TPS79633DCQRG4?
The typical quiescent current is 265 μA, reducing to less than 1 μA in shutdown mode.
- In what package is the TPS79633DCQRG4 available?
The TPS79633DCQRG4 is available in a 3 × 3 mm VSON package.
- What are some common applications for the TPS79633DCQRG4?
Common applications include RF electronics, audio and Bluetooth/Wireless LAN devices, cellular and cordless telephones, and handheld organizers and PDAs.
- How do I enable or disable the TPS79633DCQRG4?
The enable pin (EN) is active high and compatible with standard and low-voltage TTL-CMOS levels. When not used, EN can be connected to IN.
