FPF1321 Datasheet, PDF (1/16 Pages) Fairchild Semiconductor – IntelliMAX™ Dual-Input Single-Output Advanced Power Switch with True Reverse-Current Blocking

January 2012
FPF1320 / FPF1321
IntelliMAX™ Dual-Input Single-Output Advanced Power
Switch with True Reverse-Current Blocking
Features
 DISO Load Switches
 Input Supply Operating Range: 1.5V ~ 5.5V
 R_ON 50mΩ at V_IN=3.3V Per Channel (Typical)
 True Reverse-Current Blocking (TRCB)
 Fixed Slew Rate Controlled 130µs for < 1µF C_OUT
 I_SW: 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
Applications
 Smart phones / Tablet PCs
 Portable Devices
 Near Field Communication (NFC) Capable
SIM Card Power Supply
Description
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.
Ordering Information
Part
Number
Top
Mark
Channel
Switch Per
Channel (Typ.)
at 3.3V_IN
Reverse
Current
Blocking
Output
Rise
Discharge Time (t_R)
Package
FPF1320UCX QS DISO
50mΩ
FPF1321UCX QT DISO
50mΩ
Yes
NA
130µs
1.0mmX1.5mm Wafer-
Level Chip-Scale
Package (WLCSP) 6-
Yes
65Ω
130µs ^{Bumps, 0.5mm Pitch}
© 2011 Fairchild Semiconductor Corporation
FPF1320 / FPF1321 • Rev. 1.0.0
www.fairchildsemi.com