1 Features
• Input range from 3.5V to 80V
– Selectable input voltage operation threshold up to 58.5V in 0.5V steps
• Dynamical Vo programming using I2C from:
– 3.3V to 48V in 20mV monotonous steps
– 3.3V up to 23V in 10mV monotonous steps
• Peak current regulation control with small voltage transition ripple overall operating modes
• Shut down quiescent current: 3μA
• Operating quiescent current: 75μA
• Drive (DRV1) 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 microcontroller supply
• Integrated full-bridge gate drive
– Peak current capability: 2A
– Bootstrap over and undervoltage protection
– Integrated bootstrap diode
• Fixed frequency independent from operating mode (boost, buck-boost, buck)
– Forced PWM mode selectable
– Switching frequency: 100kHz to 2200kHz
– External clock synchronization and clock output
• Spread spectrum operation selectable
• Average input or output current sensor
– Programmable from 0.5A to 7A in 50mA steps
• I2C programmable with diagnostics
• AEC-Q100 qualified for automotive applications
– Junction temperature: –40°C to 150°C, TJ
• 40-pin WSON package with wettable flanks
• Functional Safety-Capable
– Documentation available to aid functional safety system design
• Create a custom design using the LM851772-Q1 with the WEBENCH® Power Designer