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1 Features

1? 2.5-V to 6-V Input Range

? MAX8860 Pin, Package, and Specification

Compatible

? 300-mA Output Current

? 120-mV Typical Dropout at 300 mA

? 90-μA Typical Quiescent Current

? 1-nA Typical Shutdown Mode

? 60-dB Typical PSRR

? 120-μs Typical Turnon Time

? Stable With Small Ceramic Output Capacitors

? 37-μVRMS Output Voltage Noise

(10 Hz to 100 kHz)

? Overtemperature/Overcurrent Protection

? ±2% Output Voltage Tolerance

? Create a Custom Design Using the LP3982 With

the WEBENCH? Power Designer

2 Applications

? Wireless Handsets

? DSP Core Power

? Battery Powered Electronics

? Portable Information Appliances

3 Description

The LP3982 low-dropout (LDO) CMOS linear

regulator is available in 1.8-V, 2.5-V, 2.82-V, 3-V,

3.3-V, and adjustable versions. They deliver 300 mA

of output current. Packaged in an 8-pin VSSOP, the

LP3982 is pin- and package-compatible with Maxim's

MAX8860. The LM3982 is also available in the small

footprint WSON package.

The LP3982 suits battery-powered applications

because of its shutdown mode (1 nA typical), low

quiescent current (90 μA typical), and LDO voltage

(120 mV typical). The low dropout voltage allows for

more utilization of a battery’s available energy by

operating closer to its end-of-life voltage. The LP3982

device's PMOS output transistor consumes relatively

no drive current compared to PNP LDO regulators.

This PMOS regulator is stable with small ceramic

capacitive loads (2.2 μF typical).

These devices also include regulation fault detection,

a bandgap voltage reference, constant current

limiting, and thermal-overload protection.