Overview
The NCP705MT33TCG is a low-dropout (LDO) linear voltage regulator produced by onsemi. This device is designed to provide ultra-low quiescent current, low noise, and high power supply rejection ratio (PSRR), making it suitable for noise-sensitive RF applications such as power amplifiers in satellite radios, infotainment equipment, and precision instrumentation. The NCP705MT33TCG is particularly optimized for battery-operated portable applications, featuring dynamic Iq management to minimize quiescent current consumption at light-load conditions.
Key Specifications
| Parameter | Min | Typ | Max | Unit |
|---|---|---|---|---|
| Operating Input Voltage | 2.5 | 5.5 | V | |
| Output Voltage (Fixed) | 3.3 | V | ||
| Output Current | 500 | mA | ||
| Quiescent Current | 13 | μA | ||
| Noise (100 Hz to 100 kHz) | 12 | μVrms | ||
| Dropout Voltage (Typical at 500 mA) | 230 | 350 | mV | |
| Output Voltage Accuracy | -2 | +2 | % | |
| Power Supply Rejection Ratio (PSRR) at 1 kHz | 71 | dB | ||
| Thermal Shutdown Temperature | 160 | °C |
Key Features
- Ultra-low quiescent current of 13 μA typical.
- Ultra-low noise: 12 μVrms from 100 Hz to 100 kHz.
- Very low dropout voltage: 230 mV typical at 500 mA.
- High PSRR: 71 dB at 1 kHz.
- Internal soft-start to limit the turn-on inrush current.
- Thermal shutdown and current limit protections.
- Stable with a 1 μF ceramic output capacitor.
- Active output discharge for fast turn-off.
- Pb-free device.
Applications
- PDAs, Mobile Phones, GPS, Smartphones.
- Wireless Handsets, Wireless LAN, Bluetooth®, ZigBee®.
- Portable Medical Equipment.
- Other battery-powered applications.
Q & A
- What is the operating input voltage range of the NCP705MT33TCG?
The operating input voltage range is from 2.5 V to 5.5 V. - What is the typical output voltage of the NCP705MT33TCG?
The typical output voltage is 3.3 V. - What is the maximum output current of the NCP705MT33TCG?
The maximum output current is 500 mA. - What is the quiescent current of the NCP705MT33TCG?
The quiescent current is typically 13 μA. - What is the noise level of the NCP705MT33TCG from 100 Hz to 100 kHz?
The noise level is 12 μVrms from 100 Hz to 100 kHz. - What is the dropout voltage of the NCP705MT33TCG at 500 mA?
The dropout voltage is typically 230 mV at 500 mA. - What is the PSRR of the NCP705MT33TCG at 1 kHz?
The PSRR is 71 dB at 1 kHz. - Does the NCP705MT33TCG have thermal shutdown protection?
Yes, it has thermal shutdown protection with a temperature threshold of 160°C. - Is the NCP705MT33TCG Pb-free?
Yes, the device is Pb-free. - What type of capacitor is recommended for the output of the NCP705MT33TCG?
A 1 μF ceramic capacitor is recommended for the output to ensure stability.
