LM251772 36V V_IN 4-Switch Buck-Boost Controller with I²C for USB-PD Sourcing

1 Features

Input range from 3.5V to 36V
Dynamical V_o programming via I²C from:
- 3.3V up to 48V in 20mV steps
- 1V up to 24V in 10mV steps
Peak current regulation control
Small voltage transition ripple over all operating modes
Shut down quiescent current 3μA
Operating quiescent current 60μA
Drive (DRV) pin for dual role port power path
- Push-Pull output for fast pMOS FET control
- Configurable as charge pump driver stage for nMOS FET
Operation mode selection for high efficiency in light load and high load conditions:
- Power save mode (Single Pulse/μSleep)
- Automatic conduction mode
Integrated high voltage supply LDO
Auxiliary high voltage LDO for PD-controller supply
Integrated full-bridge gate drive
- 2A peak current capability
- Bootstrap over and under-voltage protection
- Integrated boot-strap diode
Fixed frequency independent from operating mode (boost, buck-boost, buck)
- Forced PWM mode selectable
- Switching frequency from 100kHz to 600kHz
- External clock synchronization and clock output
Average input or output current sensor
- Programmable from 0.5A to 7A in 50mA steps
I²C Interface readout of monitoring features
Commercial temperature range (Tj = 0°C to 70°C)
Create a custom design using the LM251772 with the WEBENCH^® Power Designer