Very Low Noise, Fast Turn On, 50 mA Low Dropout Voltage Regulator

The NCP508 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.

FEATUREs
• Very Low Noise at 39 μVrms 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 ΔIout = 50 mA
• Fast Enable Turn−On time of 20 sec
• Logic Level Enable
• ESR can vary from a few mΩ to 3 Ω
• These are Pb−Free Devices

Typical Applications
• RF Subsystems in Handsets
• Noise Sensitive Circuits; VCOs, PLL