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5V至3.3V输出、同步整流、降压型电源控制器

±2.5%高精度电源,用于单、双Pentium®处理器系统

产品详情

主要特征

应用/用途

Parametric specs for Step-Down Switching Regulators
VIN (V) (min) 4.5
VIN (V) (max) 5.5
VOUT1 (V) (min) 3.3
VOUT1 (V) (max) 3.6
IOUT1 (A) (max) 10
Switch Type External
Preset VOUT (V) 3.3
3.45
3.6
Output Adjust. Method Preset
Resistor
Synchronous Switching? Yes
# DC-DC Outputs 1
Switching Frequency (kHz) 350
Package/Pins SSOP/20
Budgetary
Price (See Notes)
3.74
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简化框图

技术文档

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参量

Parametric specs for Step-Down Switching Regulators
VIN (V) (min) 4.5
VIN (V) (max) 5.5
VOUT1 (V) (min) 3.3
VOUT1 (V) (max) 3.6
IOUT1 (A) (max) 10
Switch Type External
Preset VOUT (V) 3.3
3.45
3.6
Output Adjust. Method Preset
Resistor
Synchronous Switching? Yes
# DC-DC Outputs 1
Switching Frequency (kHz) 350
Package/Pins SSOP/20
Budgetary
Price (See Notes)
3.74

主要特征

  • >90% Efficiency
  • 700µA Quiescent Supply Current
  • 120µA Standby Supply Current
  • 4.5V-to-5.5V Input Range
  • Low-Cost Application Circuit
  • All N-Channel Switches
  • Small External Components
  • Tiny Shrink-Small-Outline Package (SSOP)
  • Predesigned Applications:
    • Standard 5V to 3.3V DC-DC Converters up to 10A
    • High-Accuracy Pentium P54C VR-Spec Supply
  • Fixed Output Voltages Available:
    • 3.3V (Standard)
    • 3.45V (High-Speed Pentium™)
    • 3.6V (PowerPC™)

应用/用途

  • 本地5V至3.3V DC-DC转换
  • 微处理器子板
  • 高达10A或更高功率的电源

描述

The MAX767 is a high-efficiency, synchronous buck controller IC dedicated to converting a fixed 5V supply into a tightly regulated 3.3V output. Two key features set this device apart from similar, low-voltage step-down switching regulators: high operating frequency and all N-channel construction in the application circuit. The 300kHz operating frequency results in very small, low-cost external surface-mount components.

The inductor, at 3.3µH for 5A, is physically at least five times smaller than inductors found in competing solutions. All N-channel construction and synchronous rectification result in reduced cost and highest efficiency. Efficiency exceeds 90% over a wide range of loading, eliminating the need for heatsinking. Output capacitance requirements are low, reducing board space and cost.

The MAX767 is a monolithic BiCMOS IC available in 20-pin SSOP packages. For other fixed output voltages and package options, please consult the factory.

简化框图

MAX767、MAX767R、MAX767S、MAX767T:典型应用电路 MAX767、MAX767R、MAX767S、MAX767T:典型应用电路 Zoom icon

技术文档

支持和培训

在Maxim的知识库中搜索技术问题的答案

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Maxim的专业工程师团队也会为您解答相应的技术问题,请访问Maxim的 支持中心