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Micrel Semiconductor
Micrel Semiconductor

MIC2526 Datasheet Preview

MIC2526 Datasheet

Dual USB Power Control Switch Not Recommended for New Designs

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MIC2526 pdf
MIC2526
Micrel
MIC2526
Dual USB Power Control Switch
Not Recommended for New Designs
Refer to MIC2026
General Description
The MIC2526 is a dual integrated high-side power switch with
independent enable and flag functions, optimized for self-
powered and bus-powered Universal Serial Bus (USB) appli-
cations. Few external components are necessary to satisfy
USB requirements.
The MIC2526 satisfies the following USB requirements: each
switch channel supplies up to 500mA as required by USB
downstream devices; the switch’s low on-resistance meets
USB voltage drop requirements; fault current is limited to
typically 750mA, well below the UL 25VA safety require-
ments; and a flag output is available to indicate fault condi-
tions to the local USB controller. Soft start eliminates the
momentary voltage drop on the upstream port that may occur
when the switch is enabled in bus-powered applications.
Additional features include thermal shutdown to prevent
catastrophic switch failure from high-current loads,
undervoltage lockout (UVLO) to ensure that the device re-
mains off unless there is a valid input voltage present, and
3.3V and 5V logic compatible enable inputs.
The MIC2526 is available in active-high and active-low ver-
sions in 8-pin DIP and SOIC packages.
Features
Compliant to USB specifications
UL Recognized Component
2 independent switches
3V to 5.5V input
500mA minimum continuous load current per port
140mmaximum on-resistance
1.25A maximum short circuit current limit
Individual open-drain fault flag pins
110µA typical on-state supply current
1µA typical off-state supply current
Output can be forced higher than input (off-state)
Thermal shutdown
2.4V typical undervoltage lockout (UVLO)
1ms turn-on (soft-start) and fast turnoff
Active-high or active-low enable versions
8-pin SOIC and DIP packages
Applications
USB host and self-powered hubs
USB bus-powered hubs
Hot plug-in power supplies
Battery-charger circuits
Typical Application
4.50V to 5.25V
Upstream VBUS
100mA max.
VBUS
D+
D
GND
MIC5207-3.3
IN OUT
1µF
GND
Data
10k
10k
3.3V USB Controller
VIN ON/OFF
1µF OVERCURRENT
OVERCURRENT
ON/OFF
100k
100k
MIC2526-2
ENA
FLGA
FLGB
ENB
OUTA
IN
GND
OUTB
VCC
5.0V
47µF
0.1µF
47µF
Ferrite
Beads
VBUS
D+
D
GND
VBUS
D+
D
GND
2-Port USB Self-Powered Hub
Data
(Two Pair)
to USB
Controller
USB
Port 1
USB
Port 2
UL Recognized Component
Micrel, Inc. • 1849 Fortune Drive • San Jose, CA 95131 • USA • tel + 1 (408) 944-0800 • fax + 1 (408) 944-0970 • http://www.micrel.com
February 2000
1
MIC2526



Micrel Semiconductor
Micrel Semiconductor

MIC2526 Datasheet Preview

MIC2526 Datasheet

Dual USB Power Control Switch Not Recommended for New Designs

No Preview Available !

MIC2526 pdf
MIC2526
Ordering Information
Part Number
MIC2526-1BM
MIC2526-2BM
MIC2526-1BN
MIC2526-2BN
Enable
Active High
Active Low
Active High
Active Low
Temperature Range
40°C to +85°C
40°C to +85°C
40°C to +85°C
40°C to +85°C
Package
8-Pin SOIC
8-Pin SOIC
8-pin DIP
8-pin DIP
Micrel
Pin Configuration
ENA 1
FLGA 2
FLGB 3
ENB 4
MIC2526
8 OUTA
7 IN
6 GND
5 OUTB
8-Pin SOIC (M)
8-Pin DIP (N)
Pin Description
Pin Number
1/4
2/3
6
7
8/5
(ENA) 1
(FLGA) 2
(FLGB) 3
(ENB) 4
MIC2526
LOGIC,
CHARGE
PUMP
LOGIC,
CHARGE
PUMP
6 (GND)
8 (OUTA)
7 (IN)
5 (OUTB)
Pin Name
EN(A/B)
FLG(A/B)
GND
IN
OUT(A/B)
Pin Function
Enable (Input): Logic-compatible enable input. High input > 2.1V typical.
Low input <1.9V typical (-1 active high, -2 active low). Do not float.
Fault Flag (Output): Active-low, open-drain output. Indicates overcurrent,
UVLO, and thermal shutdown.
Ground: Supply return.
Supply Input: Output MOSFET drain. Also supplies ICs internal circuitry.
Connect to positive supply.
Switch Output: Output MOSFET source. Typically connect to switched side
of load.
MIC2526
2 February 2000


Part Number MIC2526
Description Dual USB Power Control Switch Not Recommended for New Designs
Maker Micrel Semiconductor
Total Page 12 Pages
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