L4954 Voltage regulator with backup and reset, overvoltage protection and low voltage warning

L4954 is a quad output voltage regulator and a three output high side driver.

The IC includes monitoring circuitry to warn the microprocessor of a low voltage condition: the LVWarn, output, sensing the slow dropping of STCAP pins voltage, gives the microprocessor time to store data.

A reset output is generated at REG4’s decay.

External protection must be provided for reverse battery protection.

技术特性
  • 4 regulators:
    • 10 V (40 mA) low dropout
    • 8.5 V (175 mA)
    • 5 V (650 mA)
    • 5 V (100 mA) standby
  • 3 high side drivers:
    • 2 A (HSD1)
    • 0.3 A (HSD2 & HSD3)
  • No external charge pump capacitors are required
  • Standby mode controlled by 3 input pins:
    • EN1 for REG1, REG2, REG3 and HSD1
    • EN2 for HSD2
    • EN3 for HSD3
  • Individual thermal shutdown
  • Logic outputs for supply undervoltage:
    • LVWARN
    • Reset
  • Independent current limiting
  • Overvoltage shutdown
  • Short circuit protection
  • Load dump protection and overvoltage
  • Shutdown
功能框图
L4954 订购信息
订购型号 产品状态 美金价格 数量 封装 包装形式 温度范围 材料声明
L4954 Active 3.177 1000 MW 15L Tube   L4954
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