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A2525 Schematic ( PDF Datasheet ) - Allegro MicroSystems

Teilenummer A2525
Beschreibung USB POWER CONTROL SWITCHES
Hersteller Allegro MicroSystems
Logo Allegro MicroSystems Logo 




Gesamt 12 Seiten
A2525 Datasheet, Funktion
2525 AND
2535
USB POWER CONTROL SWITCHES
A2525EM
The A2525EL/M and A2535EL/M are integrated high-side power
switches, optimized for self-powered and bus-powered Universal Serial
Bus (USB) applications. Few external components are necessary to
EN 1
8 OUT satisfy USB requirements. The A2525EL/EM ENABLE inputs are
FLG 2
7 IN
active high; the A2535EL/EM are active low.
All devices are ideally suited for USB applications. Each switch
GND 3
NC 6 NC
channel supplies up to 500 mA as required by USB peripheral devices.
NC 4 NC
NC 5 NC
YDwg. PP-070A
RNote that the A2525EM (DIP) and the
OA2525EL (SOIC) are electrically identical and
Tshare a common terminal number assignment.
FACABSOLUTE MAXIMUM RATINGS
Supply Voltage, VIN ..................... 6.0 V
TOutput Voltage, VOUT .................. 6.0 V
COutput Current,
IOUT ................. Internally Limited
AENABLE Voltage Range,
VEN ......................... –0.3 V to 10 V
TFault Flag Voltage, VFLG .............. 8.0 V
NFault Flag Current, IFLG ............. 50 mA
Package Power Dissipation,
OPD ................................. See Graph
Operating Temperature Range,
CTA .......................... -40°C to +85°C
In addition, the switch’s low on-resistance permits achieving the USB
voltage-drop requirements. Fault current is limited to typically
750 mA, satisfying the UL 25 VA safety requirements, and a flag
output is available to indicate a fault condition to the local USB
controller. Momentary voltage drops that may occur on the upstream
port when the switch is enabled in bus-powered applications is elimi-
nated by a “soft start” feature.
Additional features include thermal shutdown to prevent catastrophic
switch failure from high-current loads, undervoltage lockout to ensure
that the device remains OFF unless there is a valid input voltage
present, and 3.3 V and 5 V logic-compatible enable inputs.
These switches are provided in 8-pin mini-DIP (suffix ‘M’) and
8-lead SOIC (suffix ‘L’) packages.
Features
I 2.7 V to 5.8 V Input
I Up to 500 mA Continuous Load Current per Port
I 140 mMaximum ON-Resistance
I 1.25 A Maximum Short-Circuit Current Limit
I Individual Open-Drain Fault Flag Outputs
I 100 µA Typical ON-State Supply Current
I <1 µA Typical OFF-State Supply Current
I Outputs Can be Forced Higher Than Input (off-state)
I Thermal Shutdown
I 2.2 V Typical Undervoltage Lockout
I 0.6 ms Turn On (soft-start) and Fast Turn Off
Junction Temperature, TJ ....... +150°C*
Storage Temperature Range,
I A2525 (active-high) Improved Replacement for MIC2525-1
I A2535 (active-low) Improved Replacement for MIC2525-2
TS ........................... -65°C to 150°C
Applications
* Fault conditions that produce excessive
junction temperature will activate device
thermal shutdown circuitry. These conditions
can be tolerated but should be avoided.
I USB Hosts and Self-Powered Hubs
I USB Bus-Powered Hubs
I Hot Plug-In Power Supplies
I Battery-Charger Circuits






A2525 Datasheet, Funktion
2525 AND 2535
USB
POWER CONTROL
SWITCHES
CAPACITIVE-LOAD SWITCHING PERFORMANCE
VENABLE
VENABLE
VOUT
2 V/
IOUT
500 mA/
1 ms/
CL = 50 µF
RL = 100
VOUT
2 V/
IOUT
500 mA/
VFAULT
VFAULT
VENABLE
VOUT
2 V/
CURRENT LIMITING
IOUT
500 mA/
VFAULT
1 ms/
CL = 1000 µF
RL = 12
115 Northeast Cutoff, Box 15036
6 Worcester, Massachusetts 01615-0036 (508) 853-5000
1 ms/
CL = 100 µF
RL = 100

6 Page









A2525 pdf, datenblatt
2525 AND 2535
USB
POWER CONTROL
SWITCHES
The products described here are manufactured under one or more
U.S. patents or U.S. patents pending.
Allegro MicroSystems, Inc. reserves the right to make, from time to
time, such departures from the detail specifications as may be
required to permit improvements in the performance, reliability, or
manufacturability of its products. Before placing an order, the user is
cautioned to verify that the information being relied upon is current.
Allegro products are not authorized for use as critical components
in life-support devices or systems without express written approval.
The information included herein is believed to be accurate and
reliable. However, Allegro MicroSystems, Inc. assumes no responsi-
bility for its use; nor for any infringement of patents or other rights of
third parties which may result from its use.
115 Northeast Cutoff, Box 15036
12 Worcester, Massachusetts 01615-0036 (508) 853-5000

12 Page





SeitenGesamt 12 Seiten
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