R5543 系列


  • 概述

    The R5543 Series is a CMOS-based dual supply voltage load switch IC. The R5543 Series is an ideal switch for supplying the power from the secondary power source such as the output of a step-down DC/DC converter to the load circuit. A built-in Nch. transistor with typically 18 mΩ ON resistance allows the R5543 Series to provide a low dropout voltage and prevents the reverse current during shutdown mode. Internally, a single IC consists of an internal voltage step-up circuit, a soft-start circuit, a thermal shutdown circuit, a chip enable circuit and a UVLO circuit.

    The gate voltage of Nch. driver transistor is supplied by a soft-start circuit. The soft-start circuit is supplied by the external power source (VBIAS). Soft-start time is adjustable by connecting an external capacitor. The R5543 Series is offered in an ultra-small 6-pin DFN(PL)1216-6G package which achieve the smallest possible footprint solution on boards where area is limited.

  • 规格
    输入电压范围 0.6 V to 4.8 V (5.5 V)
    工作温度范围 Tj = -40°C to 105°C (125°C)
    电源电流 Typ. 25 µA (IOUT = 0 mA)
    待机电流 Typ. 0.01 µA
    输出电流 Max. 3 A
    导通电阻 18 mΩ (VIN = 1.0 V, VBIAS = 5.0 V)
    内置FET Nch
    封装 DFN(PL)1216-6G
    VBIAS Input Voltage Range (Maximum Rating) 2.5 V to 5.5 V (6.0 V)
    Thermal Shutdown 145°C


    TSD Reverse OCP UVLO OVLO Soft Start PGOOD Auto Discharge Reset
  • 技术资料
    • Typical Application

      Typical Application

    • Switch On Resistance vs. Temperature

      Switch On Resistance vs. Temperature

      VBIAS = 5.0 V, IOUT = 500 mA

    • VOUT Output Voltage On Time vs. Delay Capacitance

      VOUT Output Voltage On Time vs. Delay Capacitance

      VIN = 3.6 V, VBIAS = 5.5 V, RLOAD = 10 Ω, COUT = 0.1 µF, Ta = 25°C

  • 品质&封装
    • 有关产品的详细信息,请参见数据表。
    • 封装文件或数据表包括封装尺寸,卷带规格,卷带盘尺寸,功耗和建议的焊盘图案。



TSD Thermal Shutdown Function
Reverse Current Protection Reverse Current Protection
OCP Overcurrent Protection
UVLO Undervoltage Lockout Protection
OVLO Overvoltage Lockout Protection
Soft Start Soft Start Function
PGOOD Power Good Output
Auto Discharge Auto Discharge Circuit



特性 Load SW
min (V)
max (V)