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LM34922-具有可调节电流限制的 28V、2A COT 降压转换器
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TI产品 - LM34922介绍

LM34922 - 具有可调节电流限制的 28V、2A COT 降压转换器

LM34922是TI德州仪器公司的一款转换器（集成开关）产品，LM34922是具有可调节电流限制的 28V、2A COT 降压转换器，本站介绍了LM34922的封装应用图解、特点和优点、功能等，并给出了与LM34922相关的TI元器件型号供参考。

LM34922 - 具有可调节电流限制的 28V、2A COT 降压转换器 - 转换器（集成开关） - DC/DC开关稳压器 - 德州仪器

产品描述

The LM34922 Constant On-time Step-Down Switching Regulator features all the functions needed to implement a low cost, efficient, buck bias regulator capable of supplying up to 2A of load current. This voltage regulator contains an N-Channel Buck switch, a startup regulator, current limit detection, and internal ripple control. The constant on-time regulation principle requires no loop compensation, results in fast load transient response, and simplifies circuit implementation. The operating frequency remains constant with line and load. The adjustable valley current limit detection results in a smooth transition from constant voltage to constant current mode when current limit is reached, without the use of current limit foldback. The PGD output indicates the output voltage has increased to within 5% of the expected regulation value. Additional features include: Low output ripple, VIN under-voltage lock-out, adjustable soft-start timing, thermal shutdown, gate drive pre-charge, gate drive under-voltage lock-out, and maximum duty cycle limit.

产品特性

  • Input Operating Voltage Range: 6V to 28V
  • Absolute Maximum Input Rating: 30V
  • Integrated 2A N-Channel Buck Switch
  • Adjustable Current Limit Allows for Smaller Inductor
  • Adjustable Output Voltage from 2.51V
  • Minimum Ripple Voltage at VOUT
  • Power Good Output
  • Switching Frequency Adjustable to 1MHz
  • COT Topology Features:
    • Switching Frequency Remains Nearly Constant with Load Current and Input Voltage Variations
    • Ultra-Fast Transient Response
    • No Loop Compensation Required
    • Stable Operation with Ceramic Output Capacitors
    • Allows for Smaller Output Capacitor and Current Sense Resistor
  • Adjustable Soft-Start Timing
  • Thermal Shutdown
  • Precision 2% Feedback Reference

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