MICROELECTRONICS
A
A
Power Management
GM2526
DUAL USB POWER SWITCH
Power Management
Features
Compliant to USB Specifications
Two Independent Switches
Input from 3V to 5.5V
Min. Continuous Load Current 500mA per port
Max. ON-Resistance 140mW
Max. Short Circuit Current Limit 1.25A
Individual Open-Drain Fault Flag Pins
ON-State Supply Current 110µA (typ.)
OFF-State Supply Current 0.75µA (typ.)
Thermal Shutdown
Undervoltage Lockout (UVLO) Typically 2.4V
1ms Turn-ON (soft-start) and Fast Turn-OFF
Active-High or Active-Low Enable Versions
Description
GM2526 is a dual high-side integrated power switch with in-
dependent enable and flag functions, designed for self-
powered and bus-powered Universal Serial Bus (USB) ap-
plications. GM2526 requires few external components.
Each of the two switch channels supply up to 500mA as
required by USB downstream devices. Each switch’s low
on-resistance meets USB voltage drop requirements. Fault
current is 750mA (typical). A flag output indicates fault
conditions to the local USB controller. The soft-start feature
prevents the transient voltage drop on the upstream port
that can occur when the switch is enabled in bus-powered
applications. Thermal shutdown protection prevents switch
failure from high-current loads. Undervoltage lockout
(UVLO) hold GM2526 off unless there is a correct input
voltage. GM2526 has 3.3V and 5V logic-compatible Enable
inputs.
GM2526 is available in Active-High and Active-Low
versions, and comes in 8-pin DIP and SOIC packages.
Application
USB Power Management
USB Host- and Self-Powered Hubs
USB Bus-Powered Hubs
Hot Plug-In Power Supplies
Battery-Charger Circuits
CONNECTION DIAGRAM
8 OUTA
ENA/ ENA 1
FLGA 2
LOGIC,
CHARGE
PUMP
7 IN
ENB/ ENB 4
5 OUTB
6
GND
GM2526 H/ L
www.gammamicro.com
PRELIMINARY
GM2526
V0.1
1
FLGB 3
LOGIC,
CHARGE
PUMP
MICROELECTRONICS
A
A
Power Management
GM2526
DUAL USB POWER SWITCH
Power Management
MARKING INFORMATION & PIN CONFIGURATIONS
(TOP VIEW)
SOP-8
IN
OUTA
GND
OUTB
8 7 6 5
GM2526
AYWW
1 2
3 4
ENB/ ENB
FLGB
ENA/ ENA
FLGA
A= Assembly Location
Y= Year
WW= Weekly
ORDERING INFORMATION
Ordering Number
GM2526HS8T
GM2526HS8R
GM2526LS8T
GM2526LS8R
Package
SOP - 8
SOP - 8
SOP - 8
SOP - 8
Shipping
100 Units / Tube
2,500 Units / Tape & Reel
100 Units / Tube
2,500 Units / Tape & Reel
* For detail Ordering Number identification, please see last page.
PIN DESCRIPTION
PIN NUMBER
PIN SYMBOL
EN(A/B)
EN(A/B)
FLG(A/B)
FUNCTION
Enable (Input): Logic-compatible enable input.
High input > 2.1V typical
Low input < 1.9V typical (H active high, L active low). Do not float.
Fault Flag (Output): Active-low, open-drain output. Indicates overcurrent,
and thermal shutdown, UVLO, OVLO
Ground: Supply return.
Supply Input: Output MOSFET drain.
Also supplies IC's internal circuitry. Connect to positive supply.
Switch Output: Output MOSFET source.
Typically connect to switched side of load.
1/4
2/3
GM2526
6
7
GND
IN
OUT(A/B)
8/5
2
MICROELECTRONICS
A
A
Power Management
GM2526
DUAL USB POWER SWITCH
Power Management
BLOCK DIAGRAM
GM2526
FLGA
OUTA
ENA/ ENA
Charge
Pump
DRIVER
Current
Limit
Thermal
Shutdown
UVLO,
OVLO
OSC.
1.2VReference
IN
Charge
Pump
Current
Limit
Gate
Control
OUTB
FLGB
ENB/ ENB
GND
FUNCTIONAL CHARACTERISTICS TEST CIRCUIT
5V
0.1µF
10k
GM2526
ENA/ ENA
FLGA
FLGB
ENB/ ENB
OUTA
IN
GND
OUTB
I
OUT
Ferrite
Bead
(1 output shown)
C
L
R
L
GM2526
3
I
LOAD
(For Current
Limit Response)
MICROELECTRONICS
A
A
Power Management
GM2526
DUAL USB POWER SWITCH
Power Management
ABSOLUTE MAXIMUM RATINGS
PARAMETER
Supply Voltage
Fault Flag Voltage
Output Voltage
Fault Flag Current
Output Current
Control Input
Storage Temperature Range
SYMBOL
V
IN
V
FLG
V
OUT
I
FLG
I
OUT
V
EN
T
S
VALUE
6
6
6
50
Internally limited
-0.3 to 12
-65 to +150
UNIT
V
V
V
mA
mA
V
°C
Operation Rating
PARAMETER
Supply Voltage
Ambient Operating Temperature
SYMBOL
V
IN
T
A
VALUE
3 to 5.5
-40 to 85
UNIT
V
°C
GM2526
4
MICROELECTRONICS
A
A
Power Management
GM2526
DUAL USB POWER SWITCH
Power Management
ELECTRICAL CHARACTERISTICS
V
IN
= 5V, T
A
= 25°C (unless otherwise noted)
CHARACTERISTICS
Supply Current
All switch on, OUT= open (Note 3)
Low-to-high transition
Enable Input Threshold
High-to-low transition (Note 3)
Enable Input Current
Enable Input Capacitance
Switch Resistance
Output Turn- ON Delay
Output Turn- ON Rise Time
Output Turn- OFF Delay
Output Turn- OFF Fall Time
Output Leakage Current
Continuous Load Current
Short-Circuit Current Limit
Current-Limit Threshold
V
EN
= 0V to 5.5V
-
V
IN
= 5V , I
OUT
= 500mA, each switch
V
IN
= 2.7V, I
OUT
= 500mA, each switch
R
L
= 10W each output
R
L
= 10W each output
R
L
= 10W each output
R
L
= 10W each output
each output (output disabled)
each output
each output (enable into load)= 4.0V
ramped load applied to enabled
output, V
OUT
4.0V
T
J
increasing
T
J
decreasing
V
IN
=5V, I
L
=10mA
V
IN
=3.3V, I
L
=10mA
Error Flag Off Current
UVLO Threshold
V
FLG
=5V
V
IN
= increasing
V
IN
=decreasing
Note 1: Exceeding the absolute maximum rating may damage the device.
Note 2: The device is not guaranteed to function outside its operating rating.
Note 3: Off is 0.8V and on is 2.4V for the GM2526-H. Off is 2.4V and on is
The enable input has approximately 200mV of hysteresis.
0.8
-1.0
-
-
-
-
-
-
-
-
0.5
0.5
-
-
-
-
-
-
-
-
1.9
±0.01
1
100
140
0.5
1
1
1
-
-
0.75
1.6
135
125
10
15
0.01
2.5
2.3
-
1.0
-
140
mW
180
-
-
20
20
10
-
1.25
2.2
-
°C
-
25
W
40
1
-
V
-
µA
ms
ms
µs
µs
µA
A
A
A
µA
pF
-
-
110
2.1
160
2.4
V
TEST CONDITIONS
Switch off, OUT= open (Note 3)
MIN
-
TYP
0.75
MAX
5
UNIT
µA
Overtemperature Shutdown
Threshold
Error Flag Output Resistance
0.8V for the GM2526-L.
GM2526
5
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