LP3881_TI 具有使能功能的 800mA、低输入电压 (1.291V)、超低压降稳压器

LP3881的基本参数

制造厂商：TI
产品类别：电源管理
技术类目：线性和低压降 (LDO) 稳压器
功能描述：具有使能功能的 800mA、低输入电压 (1.291V)、超低压降稳压器
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LP3881的产品详情：

The LP3881 is a high current, fast response regulator which can maintain output voltage regulation with minimum input to output voltage drop. Fabricated on a CMOS process, the device operates from two input voltages: Vbias provides voltage to drive the gate of the N-MOS power transistor, while Vin is the input voltage which supplies power to the load. The use of an external bias rail allows the part to operate from ultra low Vin voltages. Unlike bipolar regulators, the CMOS architecture consumes extremely low quiescent current at any output load current. The use of an N-MOS power transistor results in wide bandwidth, yet minimum external capacitance is required to maintain loop stability.

The fast transient response of these devices makes them suitable for use in powering DSP, Microcontroller Core voltages and Switch Mode Power Supply post regulators. The parts are available in TO-220, TO-263 and SOIC-8 packages.

Dropout Voltage: 75 mV (typ) @ 0.8A load current.

Ground Pin Current: 3 mA (typ) at full load.

Shutdown Current: 60 nA (typ) when S/D pin is low.

Precision Output Voltage: 1.5% room temperature accuracy.

LP3881的优势和特性：

Ultra Low Dropout Voltage (75 mV @ 0.8A Typ)
Low Ground Pin Current
Load Regulation of 0.04%/A
60 nA Typical Quiescent Current in Shutdown
1.5% Output Accuracy (25°C)
TO-220, TO-263 and SOIC-8 Packages
Over Temperature/Over Current Protection
?40°C to +125°C Junction Temperature Range

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LP3881的参数（英文）：

Output options
Fixed Output
Iout (Max) (A)
0.8
Vin (Max) (V)
5.5
Vin (Min) (V)
1.291
Vout (Max) (V)
1.8
Vout (Min) (V)
1.2
Fixed output options (V)
1.2, 1.5, 1.8
Noise (uVrms)
90
Iq (Typ) (mA)
4
Thermal resistance θJA (°C/W)
40
Rating
Catalog
Load capacitance (Min) (μF)
4.7
Regulated outputs (#)
1
Features
Enable
Accuracy (%)
2
PSRR @ 100 KHz (dB)
45
Dropout voltage (Vdo) (Typ) (mV)
75
Operating temperature range (C)
-40 to 125

LP3881具体的完整产品型号参数及价格（美元）：

LP3881的完整型号有：LP3881ES-1.2/NOPB、LP3881ES-1.5/NOPB、LP3881ES-1.8/NOPB、LP3881ESX-1.2/NOPB、LP3881ESX-1.8/NOPB，以下是这些产品的关键参数及官网采购报价：

LP3881ES-1.2/NOPB，工作温度：-40 to 125，封装：DDPAK/TO-263 (KTT)-5，包装数量MPQ：45个，MSL 等级/回流焊峰值温度：Level-3-245C-168 HR，引脚镀层/焊球材料：SN，TI官网LP3881ES-1.2/NOPB的批量USD价格：2.574（1000+）

LP3881ES-1.5/NOPB，工作温度：-40 to 125，封装：DDPAK/TO-263 (KTT)-5，包装数量MPQ：45个，MSL 等级/回流焊峰值温度：Level-3-245C-168 HR，引脚镀层/焊球材料：SN，TI官网LP3881ES-1.5/NOPB的批量USD价格：2.145（1000+）

LP3881ES-1.8/NOPB，工作温度：-40 to 125，封装：DDPAK/TO-263 (KTT)-5，包装数量MPQ：45个，MSL 等级/回流焊峰值温度：Level-3-245C-168 HR，引脚镀层/焊球材料：SN，TI官网LP3881ES-1.8/NOPB的批量USD价格：2.574（1000+）

LP3881ESX-1.2/NOPB，工作温度：-40 to 125，封装：DDPAK/TO-263 (KTT)-5，包装数量MPQ：500个，MSL 等级/回流焊峰值温度：Level-3-245C-168 HR，引脚镀层/焊球材料：SN，TI官网LP3881ESX-1.2/NOPB的批量USD价格：2.145（1000+）

LP3881ESX-1.8/NOPB，工作温度：-40 to 125，封装：DDPAK/TO-263 (KTT)-5，包装数量MPQ：500个，MSL 等级/回流焊峰值温度：Level-3-245C-168 HR，引脚镀层/焊球材料：SN，TI官网LP3881ESX-1.8/NOPB的批量USD价格：2.145（1000+）

LP3881的评估套件：

LP3881的电路图解：

LP3881的评估套件：