Micrel MIC2025, MIC2075 User Manual
MIC2025/2075 Micrel
查询MIC2025供应商
MIC2025/2075
Single-Channel Power Distribution Switch
Preliminary Information
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 current 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
employed. 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
Applications
• USB peripherals
• General purpose power switching
• ACPI power distribution
• Notebook PCs
• PDAs
• PC card hot swap
Typical Application
1µF
10k
VIN
OVERCURRENT
ON/OFF
GND
MIC2025/75Logic Controller
EN OUT
FLG IN
GND OUT
NC
NC
V
CC
2.7V to 5.5V
0.1µF
Load
MM8 is a trademark of Micrel, Inc.
Micrel, Inc. • 1849 Fortune Drive • San Jose, CA 95131 • USA • tel + 1 (408) 944-0800 • fax + 1 (408) 944-0970 • http://www.micrel.com
March 2000 1 MIC2025/2075
MIC2025/2075 Micrel
Ordering Information
Part Number Enable Temperature Range Package
MIC2025-1BM Active High –40°C to +85°C 8-lead SOP
MIC2025-2BM Active Low –40°C to +85°C 8-lead SOP
MIC2025-1BMM Active High –40°C to +85°C 8-lead MSOP
MIC2025-2BMM Active Low –40°C to +85°C 8-lead MSOP
MIC2075-1BM Active High –40°C to +85°C 8-lead SOP
MIC2075-2BM Active Low –40°C to +85°C 8-lead SOP
MIC2075-1BMM Active High –40°C to +85°C 8-lead MSOP
MIC2075-2BMM Active Low –40°C to +85°C 8-lead MSOP
Pin Configuration
EN
FLG
GND
NC
Pin Description
Pin Number Pin Name Pin Function
1 EN Switch Enable (Input): Active-high (-1) or active-low (-2).
2 FLG Fault Flag (Output): Active-low, open-drain output. Indicates overcurrent or
3 GND Ground
4 NC not internally connected
5 NC not internally connected
6, 8 OUT Supply (Output): Pins must be connected together.
7 IN Supply Voltage (Input).
MIC2025/75
1
2
3
4
OUT
8
IN
7
OUT
6
NC
5
8-Lead SOP (BM)
8-Lead MSOP (BMM)
thermal shutdown conditions. Overcurrent condition must exceed tD in order
to assert FLG.
MIC2025/2075 2 March 2000
MIC2025/2075 Micrel
Absolute Maximum Ratings (Note 1)
Supply Voltage (V
Fault Flag Voltage (V
Fault Flag Current (I
Output Voltage (V
Output Current (I
Enable Input (I
) ........................................ –0.3V to 6V
IN
)..............................................+6V
FLG
) ............................................25mA
FLG
) ..................................................+6V
OUT
)...............................Internally Limited
OUT
).....................................–0.3V to VIN +3V
EN
Operating Ratings (Note 2)
Supply Voltage (V
Ambient Temperature (T
Junction Temperature (T
Thermal Resistance
SOP (θJA) ..........................................................160°C/W
MSOP(θJA) ........................................................206°C/W
) ................................... +2.7V to +5.5V
IN
).........................–40°C to +85°C
A
) .......................Internally Limited
J
Storage Temperature (TS) ....................... –65°C to +150°C
ESD Rating, Note 3
Electrical Characteristics
VIN = +5V; TA = 25°C, bold values indicate –40°C ≤ TA ≤ +85°C; unless noted
Symbol Parameter Condition Min Typ Max Units
I
DD
V
EN
I
EN
R
DS(on)
t
ON
t
R
t
OFF
t
F
I
LIMIT
t
D
Supply Current MIC20x5-1, V
OUT = open
MIC20x5-2, V
OUT = open
MIC20x5-1, V
OUT = open
MIC20x5-2, V
OUT = open
≤ 0.8V, (switch off), 0.75 5 µA
EN
≥ 2.4V, (switch off), 0.75 5 µA
EN
≥ 2.4V, (switch on), 160 µA
EN
≤ 0.8V, (switch on), 160 µA
EN
Enable Input Voltage low-to-high transition 2.1 2.4 V
high-to-low transition 0.8 1.9 V
Enable Input Hysteresis 200 mV
Enable Input Current V
= 0V to 5.5V –1 0.01 1 µA
EN
Control Input Capacitance 1 pF
Switch Resistance VIN = 5V, I
VIN = 3.3V, I
= 500mA 90 140 mΩ
OUT
= 500mA 100 160 mΩ
OUT
Output Leakage Current MIC2025/2075 (output off) 10 µA
OFF Current in Latched MIC2075 50 µA
Thermal Shutdown (during thermal shutdown state)
Output Turn-On Delay RL = 10Ω, CL = 1µF, see “Timing Diagrams” 1 2.5 6 ms
Output Turn-On Rise Time RL = 10Ω, CL = 1µF, see “Timing Diagrams” 0.5 2.3 5.9 ms
Output Turnoff Delay RL = 10Ω, CL = 1µF, see “Timing Diagrams” 50 100 µs
Output Turnoff Fall Time RL = 10Ω, CL = 1µF, see “Timing Diagrams” 50 100 µs
Short-Circuit Output Current V
= 0V, enabled into short-circuit. 0.5 0.7 1.25 A
OUT
Current-Limit Threshold ramped load applied to output, Note 4 0.85 1.25 A
Short-Circuit Response Time V
Overcurrent Flag Response VIN = 5V, apply V
Delay
= 0V to I
OUT
(Short applied to output)
VIN = 3.3V, apply V
= I
OUT
LIMIT
= 0V until FLG low 1.5 3 7 ms
OUT
OUT
24 µs
= 0V until FLG low 1.5 3 8 ms
Undervoltage Lockout VIN rising 2.2 2.5 2.7 V
Threshold
VIN falling 2.0 2.3 2.5 V
March 2000 3 MIC2025/2075
MIC2025/2075 Micrel
Symbol Parameter Condition Min Typ Max Units
Error Flag Output IL = 10mA, VIN = 5V 8 25 Ω
Resistance
Error Flag Off Current V
I
= 10mA, VIN = 3.3V 11 40 Ω
L
= 5V 10 µA
FLAG
Overtemperature Threshold TJ increasing 140 °C
TJ decreasing 120 °C
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. Devices are ESD sensitive. Handling precautions recommended.
Note 4. See “Functional Characteristics: Current-Limit Response” graph.
Test Circuit
V
Device
Under
Test
OUT
I
OUT
C
R
L
L
OUT
Timing Diagrams
t
R
V
OUT
90%
10%
90%
10%
t
F
Output Rise and Fall Times
V
EN
V
OUT
50%
t
OFF
t
ON
90%
10%
Active-Low Switch Delay Times (MIC20x5-2)
V
EN
50%
t
OFF
t
ON
V
OUT
90%
10%
Active-High Switch Delay Times (MIC20x5-1)
MIC2025/2075 4 March 2000
MIC2025/2075 Micrel
0
1
2
3
4
5
-40 -20 0 20 40 60 80 100
RISE TIME (ms)
TEMPERATURE (°C)
Turn-On Rise Time
vs. Temperature
RL=10Ω
C
L
=1µF
VIN = 5V
VIN = 3.3V
0
1.0
2.0
3.0
4.0
5.0
2.5 3.0 3.5 4.0 4.5 5.0 5.5
RISE TIME (ms)
INPUT VOLTAGE (V)
Turn-On Rise Time
vs. Input Voltage
RL=10Ω
C
L
=1µF
+85°C
+25°C
-40°C
0
0.5
1.0
1.5
2.0
2.5
2.5 3.0 3.5 4.0 4.5 5.0 5.5
ENABLE THRESHOLD (V)
INPUT VOLTAGE (V)
Enable Threshold
vs. Input Voltage
TA = 25°C
VEN FALLING
VEN RISING
0
0.5
1.0
1.5
2.0
2.5
-40 -20 0 20 40 60 80 100
ENABLE THRESHOLD (V)
TEMPERATURE (°C)
Enable Threshold
vs. Temperature
VIN = 5V
VEN RISING
VEN FALLING
Supply On-Current
180
160
140
120
100
CURRENT (µA)
vs. Temperature
5V
80
60
40
20
3.3V
0
-40 -20 0 20 40 60 80 100
TEMPERATURE (°C)
Supply On-Current
vs. Input Voltage
200
150
100
CURRENT (µA)
50
+85°C
0
2.5 3.0 3.5 4.0 4.5 5.0 5.5
INPUT VOLTAGE (V)
-40°C
+25°C
On-Resistance
160
140
120
100
ON-RESISTANCE (mΩ)
vs. Temperature
3.3V
OUT
5V
= 500mA
80
60
40
20
0
-40 -20 0 20 40 60 80 100
I
TEMPERATURE (°C)
On-Resistance
200
150
100
RESISTANCE (mΩ)
vs. Input Voltage
+85°C
+25°C
50
0
2.5 3.0 3.5 4.0 4.5 5.0 5.5
-40°C
I
= 500mA
OUT
INPUT VOLTAGE (V)
CURRENT LIMIT (mA)
March 2000 5 MIC2025/2075
Short-Circuit Current-Limit
1000
800
600
400
200
vs. Temperature
VIN = 3.3V
VIN = 5V
0
-40 -20 0 20 40 60 80 100
TEMPERATURE (°C)
Short-Circuit Current-Limit
vs. Input Voltage
800
700
600
500
400
300
200
CURRENT LIMIT (mA)
100
0
2.5 3.0 3.5 4.0 4.5 5.0 5.5
INPUT VOLTAGE (V)
+85°C
+25°C
-40°C
Current-Limit Threshold
1200
1000
800
600
400
200
CURRENT LIMIT THRESHOLD (mA)
vs. Temperature
VIN = 3.3V
VIN = 5V
0
-40 -20 0 20 40 60 80 100
TEMPERATURE (°C)
Current-Limit Threshold
1200
1100
1000
900
800
700
600
500
400
300
200
100
CURRENT LIMIT THRESHOLD (mA)
vs. Input Voltage
+85°C +25°C -40°C
0
2.5 3.0 3.5 4.0 4.5 5.0 5.5
INPUT VOLTAGE (V)
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