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