The MAX5003 high-voltage switching power-supply controller has all the features and building blocks needed for a cost-effective flyback and forward voltage-mode control converter. This device can be used to design both isolated and nonisolated power supplies with multiple output voltages that operate from a wide range of voltage sources. It includes a high-voltage internal start-up circuit that operates from a wide 11V to 110V input range. The MAX5003 drives an external N-channel power MOSFET and has a current-sense pin that detects overcurrent conditions and turns off the power switch when the current-limit threshold is exceeded. The choice of external power MOSFET and other external components determines output voltage and power.

The MAX5003 offers some distinctive advantages: soft-start, undervoltage lockout, external frequency synchronization, and fast input voltage feed-forward. The device is designed to operate at up to 300kHz switching frequency. This allows use of miniature magnetic components and low-profile capacitors. Undervoltage lockout, soft-start, switching frequency, maximum duty cycle, and overcurrent protection limit are all adjustable using a minimum number of external components. In systems with multiple controllers, the MAX5003 can be externally synchronized to operate from a common system clock.

Warning: The MAX5003 is designed to operate with high voltages. Exercise caution.

The MAX5003 is available in 16-pin SO and QSOP packages. An evaluation kit (MAX5003EVKIT) is also available.
MAX5003:引脚配置 MAX5003:引脚配置 放大+


  • Wide Input Range: 11V to 110V
  • Internal High-Voltage Startup Circuit
  • Externally Adjustable Settings
    • Output Switch Current Limit
    • Oscillator Frequency
    • Soft-Start
    • Undervoltage Lockout
    • Maximum Duty Cycle
  • Low External Component Count
  • External Frequency Synchronization
  • Primary or Secondary Regulation
  • Input Feed-Forward for Fast Line-Transient Response
  • Precision ±2.5% Reference over Rated Temperature Range
  • Thermal Shutdown


  • +42V汽车系统
  • 高压电源模块
  • 工业电源
  • ISDN电源
  • 电信电源


应用笔记 3539 50瓦特内部总线结构(IBA)电源
应用笔记 3363 新型以太网系统, 与数据传输一起提供直流供电
应用笔记 819 用于电信/数据通信的隔离式电源


申请可靠性报告: MAX5003 
型号   生产流程   工艺   样本量   不合格   FIT @ 25°C   FIT @ 55°C   Material Composition  

备注: 通过技术手段对故障率进行汇总,并映射到相关的材料部件号。 故障率与被测件的数量密切相关。

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