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Data Sheet
27447.2*
2526 AND
2536
USB DUAL POWER CONTROL SWITCHES
A2526EM
1
2
3
45
6
7
8ENA
FLGA
FLGB
ENB
OUTA
IN
GND
OUTB
Dwg. PP-070-2
GATE
CONTROL
GATE
CONTROL
The A2526EL/M and A2536EL/M are integrated high-side dual
power switches, optimized for self-powered and bus-powered Univer-
sal Serial Bus (USB) applications. Few external components are
necessary to satisfy USB requirements. The A2526EL/EM ENABLE
inputs are active high; the A2536EL/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.
Features
a73 2.7 V to 5.8 V Input
a73 Up to 500 mA Continuous Load Current per Port
a73 140 mΩ Maximum ON-Resistance
a73 1.25 A Maximum Short-Circuit Current Limit
a73 Individual Open-Drain Fault Flag Outputs
a73 125 µA Typical ON-State Supply Current
a73 <1 µA Typical OFF-State Supply Current
a73 Outputs Can be Forced Higher Than Input (off-state)
a73 Thermal Shutdown
a73 2.2 V Typical Undervoltage Lockout
a73 0.6 ms Turn On (soft-start) and Fast Turn Off
a73 A2526 (active-high) Improved Replacement for MIC2526-1
a73 A2536 (active-low) Improved Replacement for MIC2526-2
Applications
a73 USB Hosts and Self-Powered Hubs
a73 USB Bus-Powered Hubs
a73 Hot Plug-In Power Supplies
a73 Battery-Charger Circuits
Note that the A2526EM (DIP) and the
A2526EL (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.