1 Features
Buck-Boost Controller for Step-Up/Step-DownDC/DC Conversion
Dynamical programming of Output current andOutput voltage using PWM signal or analog signal
2V to 32 V wide output range
Comprehensive protection features includingOutput Short Protection (OSP), Cycle-by-Cycleinput and output Peak Current Limit, thermalregulation, thermal shutdown, input UVLO, inputOVP, output OVP etc.
Adjustable Switching Frequency using resistor
Frequency dithering for good EMI performance
Integrated 2-A MOSFET Gate Drivers
Input or Output Average Current Limiting withstable CC loop
5V/55mA low I q LDO to power system 宁波MCU
Available in QFN4x4-32 Package
2 Applications
Automotive Start-Stop Systems
Industrial PC Power Supplies
USB Power Delivery
Car charger
HUB Power
3 Description
PL5501 is a synchronous 4-switch Buck-Boostcontroller capable of regulating the output voltage atabove or below the input voltage. PL5501 operatesover a wide input voltage range of 3.6 V to 32 V (36 Vmaximum) to support a variety of applications.
PL5501 employs Constant ON time control in buck,boost and buck-boost operation modes for superiorload and line regulation. The switching frequencycould be set to 150kHz, 300kHz, 600kHz or 1200kHz
based on different resistor value between FREQ pinand GND pin. The device also features aprogrammable soft-start function and offers all kindsof protection features including cycle-by-cycle currentlimiting, input under voltage lockout (UVLO), outputover voltage protection (OVP), input Over VoltageProtection, thermal shutdown and output shortprotection etc.
VADJ, IADJ pins are used to program output VBUSvoltage and output current limit, provides voltagecontrol loop, constant current loop, thermal regulationloop, temperature sensing, which makes PL5501an excellent option for USB Power Delivery (PD)application.
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