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Micrel Semiconductor
Micrel Semiconductor

MIC2525-1BM Datasheet Preview

MIC2525-1BM Datasheet

USB Power Control Switch Not Recommended for New Designs

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MIC2525-1BM pdf
MIC2525
Micrel
MIC2525
USB Power Control Switch
Not Recommended for New Designs
Refer to MIC2025
General Description
The MIC2525 is an integrated high-side power switch, opti-
mized for self-powered and bus-powered Universal Serial
Bus (USB) applications. Few external components are nec-
essary to satisfy USB requirements.
The MIC2525 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 MIC2525 is a UL recognized component and is available
in active-high and active-low versions in 8-pin DIP and SOIC
packages.
For new designs, please see the MIC2025/2075.
Features
Compliant to USB specifications
UL Recognized Component
3V to 5.5V input
500mA minimum continuous load current per port
140mmaximum on-resistance
1.25A maximum short circuit current limit
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 hosts 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
3.3V 10k
3.3V USB Controller
VIN ON/OFF
1µF OVERCURRENT
GND
100k
VCC
5.0V
MIC2525-2
EN
FLG
GND
NC
OUT
IN
OUT
NC
150µF
Ferrite
Beads
VBUS
D+
D
GND
0.1µF
USB
Port
Data
Data
Single-Port USB Self-Powered Hub
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
January 2000
1
MIC2525



Micrel Semiconductor
Micrel Semiconductor

MIC2525-1BM Datasheet Preview

MIC2525-1BM Datasheet

USB Power Control Switch Not Recommended for New Designs

No Preview Available !

MIC2525-1BM pdf
MIC2525
Ordering Information
Part Number
MIC2525-1BM
MIC2525-2BM
MIC2525-1BN
MIC2525-2BN
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
Pin Configuration
EN 1
FLG 2
GND 3
NC 4
MIC2525
8 OUT
7 IN
6 OUT
5 NC
8-Pin SOIC (M)
8-Pin DIP (N)
(EN) 1
(FLG) 2
MIC2525
LOGIC,
CHARGE
PUMP
3 (GND)
6, 8 (OUT)
7 (IN)
Micrel
Pin Description
Pin Number
1
2
3
4, 5
7
6, 8
Pin Name
EN
FLG
GND
NC
IN
OUT
Pin Function
Enable (Input): Logic-compatible enable input. High input > 2.1V typical.
Low input <1.9V typical (-1 active high, -2 active low).
Fault Flag (Output): Active-low, open-drain output. Indicates overcurrent,
UVLO and thermal shutdown.
Ground: Supply return.
Not internally connected. (For pin compatibility with the MIC2505, connect
pin 7 to pin 5 and leave pin 4 unconnected.)
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.
MIC2525
2 January 2000


Part Number MIC2525-1BM
Description USB Power Control Switch Not Recommended for New Designs
Maker Micrel Semiconductor
Total Page 12 Pages
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