The LP38842 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 and DDPAK/TO-263 packages.

Dropout Voltage: 115 mV (typ) at 1.5A load current.

Quiescent Current: 30 mA (typ) at full load.

Shutdown Current: 30 nA (typ) when S/D pin is low.

Precision Output Voltage: 1.5% room temperature accuracy.

• Ideal for Conversion from 1.8V or 1.5V Inputs
• Designed for use with low ESR Ceramic Capacitors
• 0.8V, 1.2V and 1.5V Standard Voltages Available
• Ultra Low Dropout Voltage (115mV at 1.5A typ)
• 1.5% Initial Output Accuracy
• Load Regulation of 0.1%/A (typical)
• 30nA Quiescent Current in Shutdown (typical)
• Low Ground Pin Current at all Loads
• Over Temperature/Over Current Protection
• Available in 5 Lead TO-220 and DDPAK/TO-263 Packages
• ?40°C to +125°C Junction Temperature Range

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• Output options
• Fixed Output
• Iout (Max) (A)
• 1.5
• Vin (Max) (V)
• 5.5
• Vin (Min) (V)
• 0.915
• Vout (Max) (V)
• 1.5
• Vout (Min) (V)
• 0.8
• Fixed output options (V)
• 0.8, 1.2, 1.5
• Noise (uVrms)
• 90
• Iq (Typ) (mA)
• 32
• Thermal resistance θJA (°C/W)
• 35
• Rating
• Catalog
• Load capacitance (Min) (μF)
• 4.7
• Regulated outputs (#)
• 1
• Features
• Enable
• Accuracy (%)
• 2
• PSRR @ 100 KHz (dB)
• 29
• Dropout voltage (Vdo) (Typ) (mV)
• 115
• Operating temperature range (C)
• -40 to 125

LP38842的完整型号有：LP38842S-0.8/NOPB、LP38842S-1.2/NOPB、LP38842S-1.5/NOPB、LP38842SX-1.2/NOPB、LP38842SX-1.5/NOPB、LP38842T-1.2/NOPB、LP38842T-1.5/NOPB，以下是这些产品的关键参数及官网采购报价：

LP38842S-0.8/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LP38842S-0.8/NOPB的批量USD价格：1.045（1000+）

LP38842S-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LP38842S-1.2/NOPB的批量USD价格：1.254（1000+）

LP38842S-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LP38842S-1.5/NOPB的批量USD价格：1.254（1000+）

LP38842SX-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LP38842SX-1.2/NOPB的批量USD价格：1.045（1000+）

LP38842SX-1.5/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LP38842SX-1.5/NOPB的批量USD价格：1.045（1000+）

LP38842T-1.2/NOPB，工作温度：-40 to 125，封装：TO-220 (KC)-5，包装数量MPQ：45个，MSL 等级/回流焊峰值温度：Level-1-NA-UNLIM，引脚镀层/焊球材料：SN，TI官网LP38842T-1.2/NOPB的批量USD价格：1.045（1000+）

LP38842T-1.5/NOPB，工作温度：-40 to 125，封装：TO-220 (KC)-5，包装数量MPQ：45个，MSL 等级/回流焊峰值温度：Level-1-NA-UNLIM，引脚镀层/焊球材料：SN，TI官网LP38842T-1.5/NOPB的批量USD价格：1.045（1000+）

LP38842EVAL — 1.5A 快速响应超低压降可调节线性稳压器

LP38842-Adj 1.5A Ultra Low Dropout Adjustable Linear Regulators Stable with Ceramic Output Capacitors