General Description
The PV88080 power management integrated circuit (PMIC) provides one PWM buck controller and
three adjustable synchronous buck regulators. The high voltage buck controller can optionally be
used to generate the supply for the other three buck converters. Two pass devices (NMOS FET) for
the high side and low side of the high voltage buck controller are external which allows the majority of
the buck controller power dissipation to be outside the PV88080. This high voltage buck controller
uses a constant on time (COT) control scheme with integrated bootstrap PMOS switch. In certain
applications, multiple PV88080s can be used together to provide enough power rails to power the
larger systems. There are three buck converters that can be used to generate the supplies for CPUs,
DDR memory and other Auxiliary functions in a typical application. The pass devices of these buck
converters are fully integrated, so no external FETs or Schottky diodes are needed. This results in
optimized power efficiency and a reduced external component count. PV88080 provides Dynamic
Voltage Control (DVC) via I2C command to support adaptive adjustment of the supply voltage based
on the processor. All power blocks have over current circuit protection and the start-up timing can be
controlled through the I2C interface. Soft start-up limits the inrush current from the input node and
secures a slope controlled activation of the rail. The PV88080 is available in a 32-pin QFN package
and is specified from –40 °C to 85 °C ambient temperature.
Key Features
■ One synchronous buck controller
□ VIN input voltage range : 7 V to 26 V
□ Programmable output voltage :
0.8 V~5.25 V when VIN <13.2 V or
1.8 V~5.25 V when VIN >13.2 V
□ Supports all ceramic output capacitors
□ Switching frequency up to 1 Mhz
□ Reference voltage with ±1% tolerance
□ Provide OVP, OCP and OTP
■ Three synchronous buck converters with
integrated low RON FET
□ Buck1, programmable output voltage from
0.75 V to 3.3 V with 5-A continuous output
current. Peak current 6 A if standalone.
□ Buck2, programmable output voltage from
0.9 V to 3.6 V with 2-A continuous output
current. Peak current 3 A if standalone.
□ Buck3, programmable output voltage from
0.9 V to 3.6 V with 2-A continuous output
current. Peak current 3 A if standalone.
□ Light load efficiency improved > 85%
□ Boot up selectable output voltage
through GPIO
■ Dynamic Voltage Control (DVC) on all buck
converters
■ Constant on time (COT) control with
selectable frequencies
■ Auto mode on all three buck converters
■ Adjustable soft start
■ Two GPIO, one nIRQ and I2C compatible
interface
■ Mute function: eliminates audio popping
noise in power plug OFF scenario.
■ Power fail detect function to alert the
application processor.
■ External thermal sense function: establish
the remote temperature sensing ability on
the system.
■ -40 to 85 ºC ambient temperature range
■ Custom 32-pin QFN package with thermal
pad, 0.5 mm pin pitch