SP2526A Просмотр технического описания (PDF) - Signal Processing Technologies
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SP2526A Datasheet PDF : 10 Pages
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®
Advanced
SP2526A
Dual USB High-Side Power Switch
FEATURES
■ +3.0V to +5.5V Input Voltage Range
■ Two Independent Power Switches
■ Two Error Flag Outputs, Open Drain
■ 2.6V Undervoltage Lockout
■ 1.25A Short Circuit Current Limit
■ 150mΩ Maximum On-Resistance
■ 110µA On-State Supply Current
■ 1µA Shutdown Current
■ Output Can Be Forced Higher Than
Input (Off-State)
■ Thermal Shutdown
■ 1ms Soft-Start Power Up, Fast Turn Off
ENA 1
FLGA 2
FLGB 3
ENB 4
SP2526A
8 Pin NSIOC
8 OUTA
7 IN
6 GND
5 OUTB
Now Available in Lead Free Packaging
■ Active-High Version: SP2526A-1
■ Active-Low Version: SP2526A-2
APPLICATIONS
■ USB Power Management
■ Hot Plug-In Power Supplies
■ Battery Charger Circuit
DESCRIPTION
The SP2526A device is a dual +3.0V to +5.5V USB Supervisory Power Control Switch ideal
for self-powered and bus-powered Universal Serial Bus (USB) applications. Each switch has
low on-resistance (110mΩ typical) and can supply 500mA minimum. The fault currents are
limited to 1.0A typical and the flag output pin for each switch is available to indicate fault
conditions to the USB controller. The thermal shutdown feature will prevent damage to the
device when subjected to excessive current loads. The undervoltage lockout feature will
ensure that the device will remain off unless there is a valid input voltage present.
TYPICAL APPLICATION CIRCUIT
VCC
5.0V
+ +33µF
10K
4.50V TO 5.25V
UPSTREAM VBUS
100mA MAX
VBUS
D+
D-
GND
SPX1521
IN
OUT
+ 1µF
Cin
GND
10K
USB CONTROLLER
VIN
+ 10µF
Cout
ON/OFF
OVERCURRENT
OVERCURRENT
DATA
ON
GND
* 33µF, 16V Tantalum, or
100µF, 10V Electrolytic
Bold line indicate high-current traces
Two Port Self Powered Hub
SP2526A
ENA
FLGA
OUTA
IN
FLGB
GND
ENB
OUTB
0.1µF
Ferrite Bead
+
33µF
*
0.01 µF
Ferrite Bead
VBUS
D+
D-
GND
DATA
Ferrite Bead
+
33µF
*
0.01 µF
Ferrite Bead
VBUS
D+
D-
GND
DATA
Date: 12/06/04
SP2526A Dual USB High-Side Power Switch
1
© Copyright 2004 Sipex Corporation
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