2525
AND
2535
A2525EM
GATE
CONTROL
USB POWER CONTROL SWITCHES
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
satisfy USB requirements. The A2525EL/EM ENABLE inputs are
active high; the A2535EL/EM are active low.
All devices are ideally suited for USB applications. Each switch
channel supplies up to 500 mA as required by USB peripheral devices.
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.
Data Sheet
27447.1*
EN
FLG
GND
NC
1
2
3
4
8
7
OUT
IN
NC
NC
NC
NC
NC
6
5
Dwg. PP-070A
Note that the A2525EM (DIP) and the
A2525EL (SOIC) are electrically identical and
share a common terminal number assignment.
ABSOLUTE MAXIMUM RATINGS
Supply Voltage, V
IN
.....................
6.0 V
Output Voltage, V
OUT
..................
6.0 V
Output Current,
I
OUT
.................
Internally Limited
ENABLE Voltage Range,
V
EN
.........................
–0.3 V to 10 V
Fault Flag Voltage, V
FLG
..............
8.0 V
Fault Flag Current, I
FLG
.............
50 mA
Package Power Dissipation,
P
D
.................................
See Graph
Operating Temperature Range,
T
A
..........................
-40
°
C to +85
°
C
Junction Temperature, T
J
.......
+150
°
C*
Storage Temperature Range,
T
S
...........................
-65
°
C to 150
°
C
* Fault conditions that produce excessive
junction temperature will activate device
thermal shutdown circuitry. These conditions
can be tolerated but should be avoided.
T
C
A
T
N
O
C
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
Y
R
O
T
C
A
F
Features
2.7 V to 5.8 V Input
Up to 500 mA Continuous Load Current per Port
140 mΩ Maximum ON-Resistance
1.25 A Maximum Short-Circuit Current Limit
Individual Open-Drain Fault Flag Outputs
100
µA
Typical ON-State Supply Current
<1
µA
Typical OFF-State Supply Current
Outputs Can be Forced Higher Than Input (off-state)
Thermal Shutdown
2.2 V Typical Undervoltage Lockout
0.6 ms Turn On (soft-start) and Fast Turn Off
A2525 (active-high) Improved Replacement for MIC2525-1
A2535 (active-low) Improved Replacement for MIC2525-2
USB Hosts and Self-Powered Hubs
USB Bus-Powered Hubs
Hot Plug-In Power Supplies
Battery-Charger Circuits
Applications
ALLEGRO [ ALLEGRO MICROSYSTEMS ]
