Power Switch ICs for Express CardTM - BD4157MUV

BD4157MUV is a power management switch IC for the next generation PC card (ExpressCardTM) developed by the PCMCIA. It conforms to the PCMCIA ExpressCardTM Standard, ExpressCardTM; Compliance Checklist, and ExpressCardTM Implementation Guideline and obtains the Compliance ID "EC100395" from PCMCIA. The power switch offers a number of functions-card detector, and system status detector-which are ideally suited for laptop and desktop computers.

* This product is a STANDARD grade product and not recommend for on-vehicle devices.
Part Number
Unit Quantity
Minimum Package Quantity
Packing Type
Constitution Materials List
BD4157MUV-E2 Active VQFN020V4040 2500 2500 Taping inquiry Yes
Supply Voltage(Min.)[V] 3.0
Supply Voltage(Max.)[V] 3.6
Channel Number [ch] 3
ON Resistance [mΩ] 50
Output Current[A] 1.3
Soft Start Fixed
Thermal Shut Down Recovery
Over current flag out put No
Operating Temperature (Min.)[°C] -40
Operating Temperature (Max.)[°C] 100
  • ・Incorporates three low on-resistance FETs for ExpressCardTM.
    ・Incorporates an FET for output discharge.
    ・Incorporates an enabler.
    ・Incorporates under voltage lockout (UVLO) protection.
    ・Employs an VQFN020V4040 package.
    ・Built-in thermal shutdown protector (TSD).
    ・Built-in soft start function.
    ・Incorporates an overcurrent protection (OCP).
    ・Built-in enable signal for PLL
    ・Built-in Pull up resistance for detecting ExpressCardTM
    ・Conforms to the ExpressCardTM Standard.
    ・Conforms to the ExpressCardTM Compliance Checklist.
    ・Conforms to the ExpressCardTM Implementation Guideline.
Technical Data
Application Note

Thermal Resistance