Overview
The TPS78318DDCR is a low-dropout linear voltage regulator from Texas Instruments, designed for battery-powered applications where ultralow quiescent current is crucial. This regulator is part of the TPS783 family, which offers the benefits of ultralow power consumption and miniaturized packaging. It is ideal for use in microprocessors, microcontrollers, and other battery-operated handheld products. The device features a CMOS logic level-compatible enable pin and is stable with a 1.0-μF ceramic capacitor, making it suitable for applications requiring minimal board space.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Input Voltage Range | 2.2 to 5.5 | V |
| Output Voltage | 1.8 | V |
| Output Current | 0 to 150 | mA |
| Quiescent Current (IQ) | 500 | nA |
| Accuracy Over Load, Line, and Temperature | 3% | |
| Thermal Shutdown Temperature | 160 | °C |
| Operating Junction Temperature Range | –40 to 105 | °C |
| Package Type | SOT-23-5 | |
| Power-Supply Rejection Ratio (PSRR) at 100 Hz | 20 | dB |
| Output Noise Voltage (Vn) | 86 | μVRMS |
Key Features
- Ultralow quiescent current of 500 nA, making it suitable for battery-powered applications.
- Low dropout voltage achieved using a PMOS pass transistor.
- Stable operation with a 1.0-μF ceramic capacitor.
- CMOS logic level-compatible enable pin.
- Thermal shutdown and overcurrent protection to safeguard the device during fault conditions.
- No pulldown circuitry at the output, allowing the use of the output capacitor as a temporary backup power supply.
- Miniaturized packaging in SOT-23-5, minimizing board space.
Applications
- Texas Instruments MSP430 microcontroller applications.
- Wireless handsets and smartphones.
- MP3 players and other portable audio devices.
- Battery-operated handheld products.
- Any application requiring low power consumption and minimal board space.
Q & A
- What is the input voltage range of the TPS78318DDCR?
The input voltage range is from 2.2 V to 5.5 V.
- What is the output voltage of the TPS78318DDCR?
The output voltage is fixed at 1.8 V.
- What is the maximum output current of the TPS78318DDCR?
The maximum output current is 150 mA.
- What is the quiescent current (IQ) of the TPS78318DDCR?
The quiescent current is 500 nA.
- Is the TPS78318DDCR stable with any output capacitor?
No, it requires a minimum output capacitor of 1.0 μF for stable operation.
- Does the TPS78318DDCR have thermal protection?
- What is the operating junction temperature range of the TPS78318DDCR?
The operating junction temperature range is from –40°C to 105°C.
- In what package is the TPS78318DDCR available?
- What is the power-supply rejection ratio (PSRR) of the TPS78318DDCR at 100 Hz?
- What are some typical applications of the TPS78318DDCR?
