IntelliMAX™ 3A-Capable, Slew-Rate-Controlled Load Switch with True Reverse Current Blocking

The FPF1048B advanced load management switch targets applications requiring a highly integrated solution. It disconnects loads powered from the DC power rail (<6V) with stringent off-state current targets and high load capacitances (up to 100µF). The FPF1048B consists of slew-rate controlled low-impedance MOSFET switch (23mΩ typical) and integrated analog features. The slew-rate controlled turn-on characteristic prevents inrush current and the resulting excessive voltage droop on power rails.

The FPF1048B has a True Reverse Current Blocking (TRCB) function that obstructs unwanted reverse current from VOUT to VIN during both ON and OFF states. The exceptionally low off-state current drain (<1µA maximum) facilitates compliance with standby power requirements. The input voltage range operates from 1.5V to 5.5VDC to support a wide range of applications in consumer, optical, medical, storage, portable, and industrial device power management. Switch control is managed by a logic input (active HIGH) capable of interfacing directly with low-voltage control signal / General-Purpose Input / Output (GPIO) without an external pull-down resistor.

The device is packaged in advanced, fully “green” compliant, 1.0mm x 1.5mm, Wafer-Level Chip-Scale Package (WLCSP) with backside lamination.


    ■ Input Voltage Operating Range: 1.5V to 5.5V
    ■ Typical RDS(ON):
    - 21mΩ at VIN=5.5V
    - 23mΩ at VIN=4.5V
    - 41mΩ at VIN=1.8V
    - 90mΩ at VIN=1.5V
    ■ Slew Rate/Inrush Control with tR: 2.7ms (Typ.)
    ■ 3A Maximum Continuous Current Capability
    ■ Low Off Switch Current: <1µA
    ■ True Reverse Current Blocking (TRCB)
    ■ Logic CMOS IO Meets JESD76 Standard for GPIO Interface and Related Power Supply Requirements
    ■ ESD Protected:
    - Human Body Model: >8kV
    - Charged Device Model: >1.5kV
    - IEC 61000-4-2 Air Discharge: >15kV
    - IEC 61000-4-2 Contact Discharge: >8kV
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Product Product &
Eco Status
Unit Price/
1K Order
Packing Method Convention Package Marking
FPF1048BUCX Full Production
Green as of Oct 2011

WL-CSP 6L  -  Details

PDF WL-CSP 6L  Drawing
Last Update: Jan 2015 PDF WLCSP 1.0x1.5, Packing Drawing
Last Update: May 2014
Line 1RA&K

Line 2&. (Pin One)
&2 (2-Digit Date Code)
&Z (Plant Code)

FIT 0.9 @55°C
change temp

ESD (CDM) 1500V

ESD (HBM) 8000V


Moisture Sensitivity Level (MSL) 1

Max Reflow Temp 260


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