FSA550 4PST Depletion Mode Isolation Switch0 pages

Description

Features

The FSA550 is a high-performance four-pole singlethrow (4PST) normally closed Depletion-Mode isolation
switch. The Depletion Mode technology allows the
device to conduct signals when there is no VCC available
and to isolate the signals when VCC is present.

4PST (NC)
Depletion Mode MOSFETs
Audio Frequency Range
VCC(OFF): 1.6 V to 3.0 V
RON: 0.8
RON Flat: 0.01
THD+N: 0.002% Typical
Eco Status: Fairchild Green, RoHS Compliant,
Halogen Free

The FSA550 operates on a wide V CC range for design
flexibility. Additionally, select pins allow the internal
oscillator frequency to be adjusted between 500 kHz
and 750 kHz in 75 kHz steps when V CC is present. This
feature is used to shift the electromagnetic interference
(EMI) signature to meet customer specifications.

Related Resources

Applications

FSA550 Evaluation Board

MP3 Portable Media Players
Cellular Phones, Smart Phones

FSA550

Left Speaker

L_SPKR
R_SPKR
GND

Right Speaker

Control IC

Gnd

Vcc

Noise
Canceling
IC

Typical Application

Ordering Information
Part Number

Top
Mark

Operating
Temperature Range

Package

Packing
Method

FSA550UCX

M4

-40 to +85°C

12-Ball WLCSP, 3 x 4 Array, 0.4 mm Pitch,
250 µm Ball

3000 Units on
Tape and Reel

FSA550BUCX

M4

-40 to +85°C

12-Ball WLCSP(with Backside Laminate),
3 x 4 Array, 0.4 mm Pitch, 250 µm Ball

3000 Units on
Tape and Reel

© 2011 Fairchild Semiconductor Corporation
Rev. 1.0.1

www.fairchildsemi.com

4PST Depletion Mode Isolation Switch

FSA550
4PST Depletion Mode Isolation Switch

FSA550

November 2014