MIC2025/2075
Micrel, Inc.
MIC2025/2075
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
V
CC
2.7V to 5.5V
10k
Logic Controller
VIN
1µF
ON/OFF
OVERCURRENT
GND
MIC2025/75
EN
FLG
GND
NC
OUT
IN
OUT
NC
0.1µF
Load
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
MIC2025/2075
Micrel, Inc.
Ordering Information
Part Number
Standard
MIC2025-1BM
MIC2025-2BM
MIC2025-1BMM
MIC2025-2BMM
MIC2075-1BM
MIC2075-2BM
MIC2075-1BMM
MIC2075-2BMM
Pb-Free
MIC2025-1YM
MIC2025-2YM
MIC2025-1YMM
MIC2025-2YMM
MIC2075-1YM
MIC2075-2YM
MIC2075-1YMM
MIC2075-2YMM
Active High
Active Low
Active High
Active Low
Active High
Active Low
Active High
Active Low
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
8-Lead SOIC
8-Lead SOIC
8-Pin MSOP
8-Pin MSOP
8-Lead SOIC
8-Lead SOIC
8-Pin MSOP
8-Pin MSOP
Enable
Temperature Range
Package
Pin Configuration
EN 1
FLG 2
GND 3
NC 4
MIC2025/75
8
7
6
5
OUT
IN
OUT
NC
8-Lead SOIC (BM)
8-Lead MSOP (BMM)
Pin Description
Pin Number
1
2
Pin Name
EN
FLG
Pin Function
Switch Enable (Input): Active-high (-1) or active-low (-2).
Fault Flag (Output): Active-low, open-drain output. Indicates overcurrent or
thermal shutdown conditions. Overcurrent condition must exceed t
D
in order
to assert FLG.
Ground
not internally connected
not internally connected
Supply (Output): Pins must be connected together.
Supply Voltage (Input).
3
4
5
6, 8
7
GND
NC
NC
OUT
IN
MIC2025/2075
2
June 2010
MIC2025/2075
Micrel, Inc.
Absolute Maximum Ratings
(Note 1)
Supply Voltage (V
IN
)
..........................................–0.3V
to 6V
Fault Flag Voltage (V
FLG
)
..............................................
+6V
Fault Flag Current (I
FLG
).............................................
25mA
Output Voltage (V
OUT
)
...................................................
+6V
Output Current (I
OUT
)
...............................
Internally Limited
Enable Input (I
EN
)
.....................................
–0.3V to V
IN
+3V
Storage Temperature (T
S
)
........................
–65°C to +150°C
ESD Rating,
Note 3
Operating Ratings
(Note 2)
Supply Voltage (V
IN
)
...................................
+2.7V to +5.5V
Ambient Temperature (T
A
)
..........................
–40°C to +85°C
Junction Temperature (T
J
)
........................
Internally Limited
Thermal Resistance
SOP (θ
JA
)
..........................................................
160°C/W
MSOP(θ
JA
)
........................................................
206°C/W
Electrical Characteristics
V
IN
= +5V; T
A
= 25°C,
bold
values indicate –40°C ≤ T
A
≤ +85°C; unless noted
Symbol
I
DD
Parameter
Condition
Supply Current
MIC20x5-1, V
EN
≤ 0.8V, (switch off),
OUT = open
MIC20x5-2, V
EN
≥ 2.4V, (switch off),
OUT = open
MIC20x5-1, V
EN
≥ 2.4V, (switch on),
OUT = open
MIC20x5-2, V
EN
≤ 0.8V, (switch on),
OUT = open
V
EN
Enable Input Voltage
Enable Input Hysteresis
I
EN
R
DS(on)
Enable Input Current
Control Input Capacitance
Switch Resistance
Output Leakage Current
OFF Current in Latched
Thermal Shutdown
t
ON
t
R
t
F
t
OFF
I
LIMIT
Output Turn-On Delay
Output Turn-On Rise Time
Output Turnoff Delay
Output Turnoff Fall Time
Short-Circuit Output Current
Current-Limit Threshold
Short-Circuit Response Time
t
D
Overcurrent Flag Response
Delay
Undervoltage Lockout
Threshold
V
EN
= 0V to 5.5V
V
IN
= 5V, I
OUT
= 500mA
–1
low-to-high transition
high-to-low transition
0.8
2.1
1.9
200
0.01
1
90
100
50
1
0.5
2.5
2.3
50
50
0.5
0.60
0.7
0.85
24
1.5
1.5
2.2
2.0
3
3
2.5
2.3
7
8
2.7
2.5
6
5.9
100
100
1.25
1.25
140
160
10
1
Min
Typ
0.75
0.75
Max
5
5
160
160
2.4
Units
µA
µA
µA
µA
V
V
mV
µA
pF
mΩ
mΩ
µA
µA
ms
ms
µs
µs
A
A
µs
ms
ms
V
V
V
IN
= 3.3V, I
OUT
= 500mA
MIC2025/2075 (output off)
MIC2075
(during thermal shutdown state)
R
L
= 10Ω, C
L
= 1µF, see “Timing Diagrams”
R
L
= 10Ω, C
L
= 1µF, see “Timing Diagrams”
R
L
= 10Ω, C
L
= 1µF, see “Timing Diagrams”
R
L
= 10Ω, C
L
= 1µF, see “Timing Diagrams”
V
OUT
= 0V, enabled into short-circuit.
V
OUT
= 0V to I
OUT
= I
LIMIT
(Short applied to output)
V
IN
= 5V, apply V
OUT
= 0V until FLG low
V
IN
rising
V
IN
= 3.3V, apply V
OUT
= 0V until FLG low
V
IN
falling
ramped load applied to output,
Note 4
June 2010
3
MIC2025/2075
MIC2025/2075
Symbol
Parameter
Error Flag Output
Resistance
Error Flag Off Current
Overtemperature Threshold
Note 1.
Note 2.
Note 3.
Note 4.
Micrel, Inc.
Condition
I
L
= 10mA, V
IN
= 3.3V
V
FLAG
= 5V
T
J
increasing
I
L
= 10mA, V
IN
= 5V
Min
Typ
8
11
140
120
Max
25
40
10
Units
Ω
Ω
µA
°C
°C
T
J
decreasing
Exceeding the absolute maximum rating may damage the device.
The device is not guaranteed to function outside its operating rating.
Devices are ESD sensitive. Handling precautions recommended.
See “Functional Characteristics: Current-Limit Response” graph.
Test Circuit
I
OUT
Device
Under OUT
Test
V
OUT
R
L
C
L
Timing Diagrams
t
R
V
OUT
90%
10%
90%
10%
t
F
Output Rise and Fall Times
V
E N
50%
t
O F F
t
ON
V
OUT
90%
10%
Active-Low Switch Delay Times (MIC20x5-2)
V
E N
50%
t
O F F
t
ON
90%
10%
V
OUT
Active-High Switch Delay Times (MIC20x5-1)
MIC2025/2075
4
June 2010
MIC2025/2075
Micrel, Inc.
180
160
120
100
80
60
40
20
140
S upply On-C urrent
vs . T emperature
160
140
On-R es is tanc e
vs . T emperature
5
4
T urn-O n R is e T ime
vs . T emperature
V
IN
= 3.3V
RISE TIME (ms)
CURRENT (µA)
5V
ON-RESISTANCE (mΩ)
120
100
80
60
40
20
0
-40 -20
3.3V
5V
3
2
1
0
-40 -20
V
IN
= 5V
R
L
=10Ω
C
L
=1µF
0
20 40 60
TEMPERATURE (°C)
80 100
3.3V
I
OUT
= 500mA
0
-40 -20
0 20 40 60
TEMPERATURE (°C)
80 100
0 20 40 60
TEMPERATURE (°C)
80 100
200
S upply On-C urrent
vs . Input V oltage
200
On-R es is tanc e
vs . Input V oltage
5.0
4.0
T urn-O n R is e T ime
vs . Input V oltage
150
150
+85°C
+25°C
-40°C
RESISTANCE (mΩ)
CURRENT (µA)
RISE TIME (ms)
-40°C
100
+25°C
+85°C
+85°C
100
+25°C
3.0
2.0
1.0
50
50
-40°C
I
OUT
= 500mA
R
L
=10Ω
C
L
=1µF
3.0 3.5 4.0 4.5
INPUT VOLTAGE (V)
5.0
5.5
0
2.5
3.0 3.5 4.0 4.5
INPUT VOLTAGE (V)
5.0
5.5
0
2.5
3.0 3.5 4.0 4.5
INPUT VOLTAGE (V)
5.0
5.5
0
2.5
1000
800
S hort-C irc uit C urrent-L imit
vs . T emperature
CURRENT LIMIT THRESHOLD (mA)
V
IN
= 3.3V
1200
1000
800
600
400
200
C urrent-L imit T hres hold
vs . T emperature
V
IN
= 3.3V
V
IN
= 5V
2.5
2.0
E nable T hres hold
vs . T emperature
600
400
200
0
-40 -20
V
IN
= 5V
ENABLE THRESHOLD (V)
CURRENT LIMIT (mA)
V
E N
R IS ING
V
E N
F ALLING
1.5
1.0
0.5
V
IN
= 5V
0
-40 -20
0
20 40 60
TEMPERATURE (°C)
80 100
0 20 40 60
TEMPERATURE (°C)
80 100
0
-40 -20
0 20 40 60
TEMPERATURE (°C)
80 100
800
700
S hort-C irc uit C urrent-L imit
vs . Input V oltage
CURRENT LIMIT THRESHOLD (mA)
+25°C
+85°C
ENABLE THRESHOLD (V)
CURRENT LIMIT (mA)
600
500
400
300
200
100
0
2.5
3.0 3.5 4.0 4.5
INPUT VOLTAGE (V)
5.0
5.5
-40°C
1200
1100
1000
900
800
700
600 +85°C
+25°C
-40°C
500
400
300
200
100
0
2.5 3.0 3.5 4.0 4.5 5.0
INPUT VOLTAGE (V)
C urrent-L imit T hres hold
vs . Input V oltage
2.5
2.0
E nable T hres hold
vs . Input V oltage
V
E N
R IS ING
1.5
1.0
0.5
0
2.5
V
E N
F ALLING
T
A
= 25°C
3.0 3.5 4.0 4.5
INPUT VOLTAGE (V)
5.0
5.5
5.5
June 2010
5
MIC2025/2075
微控制器 MCU
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