LP3982IMM-ADJ集成电路（IC）的线性+开关稳压器规格书PDF中文资料

LP3982IMM-ADJ属于集成电路（IC）的线性+开关稳压器。由德州仪器制造生产的LP3982IMM-ADJ稳压器 - 线性线性稳压器用于提供稳定的输出电压，无论负载电流、输入电压或环境因素如何变化，这些输出电压通常都要保持不变。它们的工作原理要求输入电压维持在高于所需的输出电压，而且要超出某个最小量，并且在工作时会将输入端的任何多余电压转换为热量。对于大多数应用而言，虽然这种稳压器的效率低于开关模式的稳压器，但它们通常更适合对噪声高度敏感的应用。

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.