1 Features

  • 1.2A continuous output current capability

  • 4.5V to 36V wide operating input range with 33V input Over Voltage Protection

  • Integrated 36V, 250mΩ high side and 36V, 140mΩ low side power MOSFET switches

  • Up to 97% efficiency

  • Internal Soft-Start limits the inrush current at turn-on

  • Internal compensation to save external components

  • Input Under-Voltage Lockout

  • Input over-voltage protection to protect device from working in high voltage and high current condition

  • Output Over-Voltage Protection

  • Output short protection with both high side current limit and low side current limit to protect the device in hard short

  • Over-Temperature Protection

  • Pulse skip mode at light load to improve light load efficiency

  • Stable with Low ESR Ceramic Output Capacitors

  • Fixed 500KHz Switching Frequency

  • Fewest external components and intensive internal protection features

  • SOP-8 Package

2 Applications

  • USB car charger

  • Portable charging device

  • General purpose DC-DC conversion


3 Description
     PL8312 is a monolithic 36V, 1.2A step-down switching regulator. PL8312 integrates a 36V 250mΩ high side and a 36V, 140mΩ low side MOSFETs to provide 1.2A continuous load current over a 4.5V to 36V wide operating input voltage with 33V input over voltage protection. Peak current mode control provides fast transient responses and cycle-by-cycle current limiting.
    PL8312 has configurable line drop compensation, configurable charging current limit. CC/CV mode control provides a smooth transition between constant current charging and constant voltage charging stages. Built-in soft-start prevents inrush current at power-up.
4 Typical Application Schematic5 Pin Configuration and Functions
1673498843138542.png 1673498802126434.png

输入电压
范围(V)
最高工作
电流(A)
产品型号
频率（kHz）
软启动
功率管
内置/外置
CC/CV
补偿
控制结构
封装
4.5-32
1.0
PL8312
500
内置Internal
内置Internal
CC/CV
内置Internal
峰值电流
SOP8


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