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, 13mΩ low side power MOSFET switches
Dynamical programming of input current, Output current and Output voltage using PWM signal or analog signal
Adjustable Switching Frequency using resistor
Frequency dithering for good EMI performance
Comprehensive protection features including Output Short Protection (OSP), Cycle-by-Cycle input and output Peak Current Limit, thermal regulation, thermal shutdown, input UVLO, input
OVP, output OVP etc.
Input or Output Average Current Limiting with stable 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 synchronous step-down switching regulator, which includes a 40V, 11m Ω high side and a 40V, 13mΩ low side MOSFETs to provide 5A continuous load current over 4.5V to 36V wide operating input voltage.
PL84051 employs Constant ON time control. The switching frequency could be set to 150kHz, 300kHz, 600kHz or 1200kHz based on different resistor value between FREQ pin and GND pin. The device also features a programmable soft-start function and offers all kinds of protection features including cycle-by-cycle current limiting, input under voltage lockout (UVLO), output over voltage protection (OVP), input Over Voltage Protection, thermal shutdown and output short protection etc.
PL84051 provides voltage control loop, constant current loop, and thermal regulation loop.