Overview
The TPS79925DDCR from Texas Instruments is a 200-mA, low-dropout (LDO) regulator designed for high-performance and low-power applications. This device combines ultra-low current consumption with high precision and stability, making it suitable for RF and precision analog applications. The TPS799 features a high-gain, high-bandwidth error loop that provides excellent power supply rejection ratio (PSRR) even at very low headroom (VIN – VOUT). It also includes a noise-reduction pin to improve PSRR and reduce noise generated by the band-gap reference. The device is fully specified over a temperature range of –40°C to +125°C and is available in various packages, including the DSBGA, SOT-23-THIN, and WSON packages.
Key Specifications
| Parameter | Min | Nom | Max | Unit |
|---|---|---|---|---|
| Input Voltage (VIN) | 2.7 | 6.5 | V | |
| Output Current (IOUT) | 0.5 | 200 | mA | |
| Operating Junction Temperature (TJ) | –40 | 125 | °C | |
| Output Voltage Accuracy | ±2% | % | ||
| Line Regulation (ΔVO/ΔVI) | 0.02 %/V | %/V | ||
| Load Regulation (ΔVO/ΔIO) | 0.002 %/mA | %/mA | ||
| Dropout Voltage (VDO) | 100 mV (VOUT ≤ 3.3 V), 90 mV (VOUT ≥ 3.3 V) | mV | ||
| Ground Pin Current (IGND) | 40 | 60 | μA | |
| Shutdown Current (ISHDN) | 1 μA | μA | ||
| Thermal Shutdown Temperature | 165 °C | °C |
Key Features
- 200-mA low-dropout regulator with enable (EN) pin.
- Multiple output voltage versions available: fixed outputs from 1.2 V to 4.5 V.
- Ultra-low ground current: 40 μA (typical).
- High PSRR due to high-gain, high-bandwidth error loop.
- Noise-reduction pin to bypass noise generated by the band-gap reference.
- Quick-start circuit for fast start-up times.
- Inrush current protection with EN toggle start-up.
- Overshoot detection and correction at the output.
- Thermal and overcurrent protection.
- Stable with ceramic capacitors.
- Available in low-profile packages: DSBGA, SOT-23-THIN, and WSON.
Applications
The TPS79925DDCR is an excellent choice for various applications requiring high performance and low power consumption, such as:
- Wireless handsets.
- WLAN cards.
- RF and precision analog circuits.
- Portable electronic devices.
- Low-power microcontrollers and system-on-chip (SoC) designs.
Q & A
- What is the maximum output current of the TPS79925DDCR?
The maximum output current is 200 mA.
- What is the typical ground current consumption of the TPS79925DDCR?
The typical ground current consumption is 40 μA.
- What is the operating temperature range of the TPS79925DDCR?
The operating temperature range is from –40°C to +125°C.
- Does the TPS79925DDCR have thermal protection?
- What types of packages are available for the TPS79925DDCR?
- How does the TPS79925DDCR handle inrush current during start-up?
- What is the purpose of the noise-reduction pin in the TPS79925DDCR?
- Is the TPS79925DDCR stable with ceramic capacitors?
- What is the typical dropout voltage of the TPS79925DDCR?
- How does the TPS79925DDCR handle output voltage overshoot?
