The NCP508SQ25T1G is a 50 mA low noise voltage regulator, designed to exhibit fast turn on time and high ripple rejection. Each device contains a voltage reference unit, an error amplifier, a PMOS power transistor, resistors for setting output voltage, current limit, and temperature limit protection circuits.
The NCP508SQ25T1G has been designed for use with ceramic capacitors. The device is housed in SC−88A and WDFN6 1.5x1.5 packages. Standard voltage versions are 1.5, 1.8, 2.5, 2.8, 3.0, and 3.3. Other voltages are available in 100 mV steps.
Feature
• Very Low Noise at 39 Vrms without a Bypass Capacitor
• High Ripple Rejection of 70 dB at 1 kHz
• Low Dropout Voltage of 140 mV (typ) at 30 mA
• Tight Load Regulation, typically 6 mV for Iout = 50 mA
• Fast Enable Turn−On time of 20 sec
• Logic Level Enable
• ESR can vary from a few m to 3
• These are Pb−Free Devices
Applications
• RF Subsystems in Handsets
• Noise Sensitive Circuits; VCOs, PLL
