特性
- One high-voltage synchronous buck controller with:
- Wide VIN range, 7V to 26V
- Programmable VOUT (0.8V to 5.25V when VIN <13.2V, 1.8V to 5.25V when VIN >13.2V)
- Up to 20A IOUT depending on external MOSFET
- Three synchronous buck converters with integrated low RON FET:
- Buck1: programmable VOUT from 0.75V to 3.3V with 5A continuous output current, and 6A peak current standalone
- Buck2: programmable VOUT from 0.9V to 3.6V with 2A continuous output current and 3A peak current standalone
- Buck3: programmable VOUT from 0.9V to 3.6V with 2A continuous output current and 3A peak current standalone
- DVC on buck controller and buck converters
- Auto mode on all buck converters, adjustable soft-start, and I2C-compatible interface
- GPIO to connect/control the other device
- Register-selectable multiple function: mute, reset timer, external thermal sense, and lower input voltage alarm
- -40 °C to +85 °C ambient temperature
- Package: 32-pin QFN
描述
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 an 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.
Benefits
- 50% reduction in board area
- High integration of rails in single package
- Re-programmability = Fast re-design
- Slew rate control improved PCB cost/performance
- Dynamic Voltage Scaling (DVS) for enhanced performance/power scaling
- Significantly fewer devices and discretes
应用
- Networking home terminals
- Wi-Fi EAP/routers
- Supply for digital television processors
- Power supply for digital set-top boxes (STB)
