The NCP731 device is based on unique combination of features –

very low noise, low quiescent current, fast transient response and high

input and output voltage ranges. The NCP731 is CMOS LDO

regulator designed for up to 38 V input voltage and 150 mA output

current. Very low noise (8 VRMS) makes this device an ideal solution

for application where clean voltage rails are critical for system

performance (power operational amplifiers, analog−to−digital /

digital−to−analog converters and other precision analog circuitry).

Internal short circuit and over temperature protections saves the

device against overload conditions.

Features

• Operating Input Voltage Range: 2.7 V to 38 V

• Output Voltage Adjustable Range: 1.2 V to 35 V

• Fixed Output Voltage Versions: 3.3 V and 5.0 V

(other voltage versions on request)

• Very Low Noise: 8 VRMS (10 Hz to 100 kHz)

• Low Quiescent Current: 48 A typ.

• Low Shutdown Current: 100 nA typ.

• Low Dropout: 290 mV typ. at 150 mA

• Output Voltage Accuracy ±0.6 (25°C)

• Programmable Soft Start Circuit

• Stable with Small 1 F Ceramic Capacitors

• Over−Current and Thermal Shutdown Protections

• Available in Micro−8 EP Package

• Device is Pb−Free and RoHS Compliant

Typical Applications

• Supply Rails for OpAmps, ADCs, DACs and other Precision Analog

Circuitry and Audio

• Post DC−DC Converter Regulation and Ripple Filtering

• Test and Measurement

• Industrial Instrumentation

• Metering

• Battery Powered Devices