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MIC2075 Schematic ( PDF Datasheet ) - Micrel Semiconductor

Teilenummer MIC2075
Beschreibung Single-Channel Power Distribution Switch MM8
Hersteller Micrel Semiconductor
Logo Micrel Semiconductor Logo 




Gesamt 14 Seiten
MIC2075 Datasheet, Funktion
MIC2025/2075
MIC2025/2075
Micrel, Inc.
Single-Channel Power Distribution Switch MM8®
General Description
The MIC2025 and MIC2075 are high-side MOSFET switches
optimized for general-purpose power distribution requiring
circuit protection.
The MIC2025/75 are internally current limited and have
thermal shutdown that protects the device and load. The
MIC2075 offers “smart” thermal shutdown that reduces cur-
rent consumption in fault modes. When a thermal shutdown
fault occurs, the output is latched off until the faulty load is
removed. Removing the load or toggling the enable input will
reset the device output.
Both devices employ soft-start circuitry that minimizes inrush
current in applications where highly capacitive loads are em-
ployed. A fault status output flag is provided that is asserted
during overcurrent and thermal shutdown conditions.
The MIC2025/75 is available in the MM8® 8‑lead MSOP
and 8‑lead SOP.
Features
• 140mΩ maximum on-resistance
• 2.7V to 5.5V operating range
• 500mA minimum continuous output current
• Short-circuit protection with thermal shutdown
• Fault status flag with 3ms filter eliminates false asser-
tions
• Undervoltage lockout
• Reverse current flow blocking (no “body diode”)
• Circuit breaker mode (MIC2075) reduces power
consumption
• Logic-compatible input
• Soft-start circuit
• Low quiescent current
• Pin-compatible with MIC2525
• UL File # E179633
Applications
• USB peripherals
• General purpose power switching
• ACPI power distribution
• Notebook PCs
• PDAs
• PC card hot swap
Typical Application
10k
Logic Controller
VIN ON/OFF
1µF OVERCURRENT
GND
VCC
2.7V to 5.5V
MIC2025/75
EN
FLG
GND
NC
OUT
IN
OUT
NC
Load
0.1µF
UL Recognized Component
MM8 is a registered trademark of Micrel, Inc.
Micrel, Inc. • 2180 Fortune Drive • San Jose, CA 95131 • USA • tel + 1 (408) 944-0800 • fax + 1 (408) 474-1000 • http://www.micrel.com
June 2010
1 MIC2025/2075






MIC2075 Datasheet, Funktion
MIC2025/2075
Flag Delay
vs . T emperature
5
4 VIN = 3.3V
3 VIN = 5V
2
1
0-40 -20 0 20 40 60 80 100
TEMPERATURE (°C)
Flag Delay
vs . Input V oltage
5
4 +85°C
3 +25°C
2
-40°C
1
02.5 3.0 3.5 4.0 4.5 5.0 5.5
INPUT VOLTAGE (V)
Micrel, Inc.
UVL O Thres hold
vs . T emperature
3.0
VIN R IS ING
2.5
2.0
VIN F ALLING
1.5
1.0
0.5
-040 -20 0 20 40 60 80 100
TEMPERATURE (°C)
MIC2025/2075
6
June 2010

6 Page









MIC2075 pdf, datenblatt
MIC2025/2075
Micrel, Inc.
4.50V to 5.25V
U p s t r e a m VB U S
100mA max.
VB U S
D+
D–
GND
MIC5203-3.3
IN OUT
1µF
GND
3.3V 10k
3.3V USB Controller
VIN ON/OFF
1µF OVERCURRENT
GND
VC C
5.0V
MIC2025/75
EN
FLG
GND
NC
OUT
IN
OUT
NC
Ferrite
Beads
120µF
0.01µF
VB U S
D+
D–
GND
0.1µF
USB
Port
Data
Data
Figure 5  USB Host Application
USB Upstream
Connector
VB U S
D+
D–
GND
MIC5203-3.3
(LDO)
IN OUT
GND
0.1µF
1.5K
3.3V 1.5k
USB Logic Controller
VIN ON/OFF
OVERCURRENT
GND
0.1µF
Data
MIC2025/75
EN
FLG
GND
NC
OUT
IN
OUT
NC
Ferrite
Beads
120µF
0.01µF
VB U S
D+
D–
GND
0.1µF
USB Downstream
Connector
(Up to four
ganaged ports)
Data
Figure 6.  USB Bus-Powered Hub
MIC2025/2075
12
June 2010

12 Page





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