LP3988中文资料具有电源正常指示和使能功能的 150mA、低压降稳压器数据手册TI规格书

描述 Description

The LP3988 is a 150-mA low dropout regulator designed specially to meet requirements of portable battery applications. The LP3988 is designed to work with space-saving, small 1-µF ceramic capacitors. The LP3988 features a Power Good (PG) output that indicates a faulty output condition. The device is ideal for mobile phone and similar battery-powered wireless applications. It provides up to 150 mA output current from a 2.5-V to 6-V input, consuming less than 1 µA in disable mode and has fast turnon time less than 200 µs. The LP3988 device's performance is optimized for battery-powered systems to deliver low noise, extremely low dropout voltage, and low quiescent current. Regulator ground current increases only slightly in dropout, further prolonging the battery life. Power supply rejection is better than 60 dB at low frequencies and starts to roll off at 10 kHz. High power-supply rejection is maintained down to lower input-voltage levels common to battery-operated circuits. The LP3988 is available in a 5-pin SOT-23 package and a 5-pin thin DSBGA package. Performance is specified for −40°C to +125°C temperature range. For all available output voltage and package options, see the Package Option Addendum (POA) at the end of the data sheet. For all available packages, see the orderable addendum at the end of the data sheet. Body size dimension is maximum.

特性 Features

• Input Voltage Range: 2.5 V to 6 V
• PSRR at 10 kHz: 40 dB
• Fast Turnon Time: 100 µs (Typical)
• Junction Temperature Range for Operation: −40°C to +125°C
• Logic Controlled Enable
• Stable with Ceramic and High-Quality Tantalum Capacitors

简介

LP3988属于集成电路（IC）的线性+开关稳压器。由TI制造生产的LP3988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。