1 Features

? 5A continuous output current capability

? 4.5V to 36V wide operating input range

? 2V to 32 V wide output range

? Integrated 40V, 11mΩ high side and 40V, 13mΩlow side power MOSFET switches

? Dynamical programming of input current, Output

current and Output voltage using PWM signal oranalog signal

? Adjustable Switching Frequency using resistor

? Frequency dithering for good EMI performance

? Comprehensive protection features includingOutput Short Protection (OSP), Cycle-by-Cycleinput and output Peak Current Limit, thermalregulation, thermal shutdown, input UVLO, inputOVP, output OVP etc.

? Input or Output Average Current Limiting withstable CC loop

? 5V/55mA low Iq LDO to power system MCU

? QFN5x5-32 Package

2 Applications

? Automotive Start-Stop Systems

? Power Bank / Car Charger

? Industrial PC Power Supplies

? USB Power Delivery

3 Description

PL84051 integrates a high efficiency synchronousstep-down switching regulator, which includes a 40V, 11m

Ω high side and a 40V, 13mΩ low side MOSFETs toprovide 5A continuous load current over 4.5V to 36V wideoperating input voltage.

PL84051 employs Constant ON time control. Theswitching frequency could be set to 150kHz, 300kHz,600kHz or 1200kHz based on different resistor value

between FREQ pin and GND pin. The device also featuresa programmable soft-start function and offers all kinds of

protection features including cycle-by-cycle current limiting,input under voltage lockout (UVLO), output over voltageprotection (OVP), input Over Voltage Protection, thermalshutdown and output short protection etc.

PL84051 provides voltage control loop, constant current

loop, and thermal regulation loop.