High-voltage buck controller
The PV88080 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.
Features
One high-voltage synchronous buck controller with:
- Wide VINrange, 7 V to 26 V
- Programmable VOUT(0.8 V to 5.25 V when VIN< 13.2 V, 1.8 V to 5.25 V when VIN> 13.2 V)
- Up to 20 A IOUTdepending on external MOSFET
Three synchronous buck converters with integrated low RONFET:
- Buck1: programmable VOUT从0.75 V至3.3 V和5控制inuous output current, and 6 A peak current standalone
- Buck2: programmable VOUTfrom 0.9 V to 3.6 V with 2 A continuous output current and 3 A peak current standalone
- Buck3: programmable VOUTfrom 0.9 V to 3.6 V with 2 A continuous output current and 3 A 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
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
DVS for enhanced performance/power scaling
Significantly fewer devices & discretes
雷竞技安卓下载
Networking home terminal
WiFi EAP/routers
Supply for digital television processor
Power supply for digital set top box (STB)
Package
32-pin QFN
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