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R5540 Series
Nch Load Switch IC

Download Datasheet

  • Description

    The R5540 Series are CMOS-based load switch IC. The R5540 is an ideal switch to supply the power from the secondary power source such as the output of a step-down DC/DC converter to the load circuit. Due to a built-in N-channel transistor with low on-resistance of 120mΩ, R5540 provides a low dropout voltage. In addition to a peak current limit circuit, R5540 has a short current limit circuit and a soft start function. Due to a reverse current protection circuit, R5540 prevent a reverse current at off state.

    Besides the low supply current by CMOS, the R5540 has low voltage with an input voltage from 0.75V (002) and 0.8V (004). Accordingly, the device supports highly integrated, low voltage-driven LSI as a rear stage of the DC/DC converter. Standby mode and auto-discharge function are also available. A 1mm square DFN(PL)1010-4F package called a flip chip is available.

  • Spec
    Input Voltage Range Code 002: 0.75 V to 3.6 V (5.0 V)
    Code 004: 0.8 V to 3.6 V (5.0 V)
    Operating Temperature Range -40°C to 85°C (125°C)
    Supply Current Typ. 9 µA (IOUT = 0 mA)
    Standby Current Typ. 0.1 µA
    Output Current Code 002: Min. 200 mA
    Code 004: Min. 450 mA
    ON-resistance Typ. 120 mΩ (VIN = 1.2 V)
    Internal FET Nch
    Package DFN(PL)1010-4F
    Built-in Over-current Sensing Function Code 002: Typ. 350 mA
    Code 004: Typ. 700 mA

    Protections / Functions

    TSD Reverse OCP UVLO OVLO Soft Start PGOOD Auto Discharge Reset
  • Technical
    • Typical Application

      Typical Application

    • Output Voltage vs. Output Current

      Output Voltage vs. Output Current

  • Quality &
    • Refer to the datasheets for the details on the product.
    • The package file or the datasheet includes package dimensions, taping specifications, taping reels dimensions, power dissipations, and recommended land pattern.

Download Datasheet

Functional Description

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

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Category:Switch ICs

Features Load SW
min (V)
max (V)
ON Resistance