微源半导体

概述

The LP3991 is a low-dropout voltage regulator with low quiescent current and ultra-small packages. The LP3991 can deliver output current up to 250mA. The device with low quiescent current is suited for portable battery-powered applications.
The LP3991 integrated current limit protection and short circuit protection in order to protect system abnormal.
The output capacitor as small as 0.1µF is available for LP3991 application.
The LP3991 is available in SOT23 package and ultra-small TDFN-4 package with only 1mm × 1mm size.

应用

◆ Wearable Devices
◆ Portable Medical Equipment
◆ PDAs, Mobile Phones GPS devices

数据参数

输出电流(mA)

250

输出电压(V)

1.2/1.8/3.0/3.3

输入电压(V)

1.5-5.5

电源抑制比(dB)

-45

精度(%)

1.5

导通压差(mV/mA)

180 @ 100

静态电流(uA)

产品特征/功能

Low Quiescent

封装

SOT23/DFN4(1*1)

特征

◆ Ultra-low current consumption: 5µA (Typ)
◆ Wide input voltage range: 1.5V to 5.5V
◆ Fixed output voltage: 3.3V
◆ Maximum load current: 250mA
◆ High output voltage accuracy: ±1.5%(Typ)
◆ Low dropout voltage:
- 80mV (Typ) at 50mA (VOUT = 3.3V)
- 170mV (Typ) at 100mA (VOUT = 3.3V)
◆ Line Regulation: 0.02%/V(Typ)
◆ Load Regulation: 15mV (Typ)
◆ Current limit and short circuit protection
◆ EN logic compatible with 1.2V
◆ Robust ESD capability:
- Human Body Model: 2000V
- Charged Device Model: 500V
◆ Available in small packages:
- SOT23
- TDFN-4