IntelliMAX™ Dual-Input Single-Output Advanced Power Switch with True Reverse-Current Blocking

The FPF1320/21 is a Dual-Input Single-Output (DISO) load switch consisting of two sets of slew-rate controlled, low on-resistance, P-channel MOSFET switches and integrated analog features. The slew-rate-controlled turn-on characteristic prevents inrush current and the resulting excessive voltage droop on the power rails. The input voltage range operates from 1.5V to 5.5V to align with the requirements of low-voltage portable device power rails. FPF1320/21 performs seamless power-source transitions between two input power rails using the SEL pin with advanced break-before-make operation.

FPF1320/21 has a TRCB function to block unwanted reverse current from output to input during ON/OFF states. The switch is controlled by logic inputs of the SEL and EN pins, which are capable of interfacing directly with low-voltage control signals (GPIO).

FPF1321 has 65Ω on-chip load resistor for output quick discharge when EN is LOW.

FPF1320/21 is available in 1.0mm x 1.5mm WLCSP, 6-bump, with 0.5mm pitch.


    ■ DISO Load Switches
    ■ Input Supply Operating Range: 1.5V ~ 5.5V
    ■ RON 50mΩ at VIN=3.3V Per Channel (Typical)
    ■ True Reverse-Current Blocking (TRCB)
    ■ Fixed Slew Rate Controlled 130µs for < 1µF COUT
    ■ ISW: 1.5A Per Channel (Maximum)
    ■ Quick Discharge Feature on FPF1321
    ■ Logic CMOS IO Meets JESD76 Standard for GPIO Interface and Related Power Supply Requirements
    ■ ESD Protected:
    - Human Body Model: >6kV
    - 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
FPF1320UCX Full Production
Green as of Aug 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 1QS&K

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

FIT 0.9 @55°C
change temp

ESD (HBM) 6000V


Moisture Sensitivity Level (MSL) 1

Max Reflow Temp 260


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