MIC2026/2076
Dual-Channel Power Distribution Switch
General Description
The MIC2026 and MIC2076 are high-side MOSFET
switches optimized for general-purpose power distribution
requiring circuit protection.
The MIC2026/76 are internally current limited and have
thermal shutdown that protects the device and load.
The MIC2076 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 asserted during overcurrent
and thermal shutdown conditions. Transient faults are
internally filtered.
The MIC2026/76 are available in 8-pin DIP or 8-pin SOIC.
All support documentation can be found on Micrel’s web
site at www.micrel.com.
Features
•
•
•
•
•
•
•
•
•
•
•
•
•
•
140mΩ maximum on-resistance per channel
2.7V to 5.5V operating range
500mA minimum continuous current per channel
Shortcircuit protection with thermal shutdown
Thermally isolated channels
Fault status flag with 3ms filter eliminates false
assertions
Undervoltage lockout
Reverse current flow blocking (no “body diode”)
Circuit breaker mode (MIC2076)
Logic-compatible inputs
Soft-start circuit
Low quiescent current
Pin compatible with MIC2526
UL File # E179633
Applications
•
USB peripherals
•
General purpose power switching
•
ACPI power distribution
•
Notebook PCs
•
PDAs
•
PC card hot swap
___________________________________________________________________________________________________________
Typical Application
V
CONT.
10k
10k
Logic Controlle
r
VIN
ON/OFF
OVERCURRENT
OVERCURRENT
ON/OFF
MIC2026-2
ENA
FLGAI
FLGB
ENB
OUTA
N
GND
OUTB
Load
0.1µF
Load
V
CC
2.7V to 5.5V
UL Recognized Component
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
M9999-060410-B
Micrel, Inc.
MIC2026/2076
Ordering Information
Part Number
Standard
MIC2026-1BM
MIC2026-2BM
MIC2026-1BN
MIC2026-2BN
MIC2076-1BM
MIC2076-2BM
MIC2076-1BN
MIC2076-2BN
Note:
1. RoHS compliant and Halogen free.
Pb-Free
MIC2026-1YM
(1)
MIC2026-2YM
(1)
—
—
MIC2076-1YM
—
—
(1)
Enable
Active High
Active Low
Active High
Active Low
Active High
Active Low
Active High
Active Low
Temperature
Range
Package
8-Pin SOIC
8- Pin SOIC
8- Pin DIP
–40°C to +85°C
8- Pin DIP
8- Pin SOIC
8- Pin SOIC
8-Pin DIP
8-Pin DIP
MIC2076-2YM
(1)
Pin Configuration
ENA 1
FLGA 2
FLGB 3
ENB 4
8 OUTA
7 IN
6 GND
5 OUTB
8-Pin SOIC (M)
8-Pin DIP (N)
Pin Description
Pin Number
1
2
Pin Name
ENA
FLGA
Pin Function
Switch A Enable (Input): Logic-compatible, enable input. Active high (-1) or
active low (-2).
Fault Flag A (Output): Active-low, open-drain output. Indicates overcurrent or
thermal shutdown conditions. Overcurrent conditions must last longer than t
D
in
order to assert FLGA.
B
B
3
FLGB
Fault Flag B (Output): Active-low, open-drain output. Low indicates overcurrent
or thermal shutdown conditions. Overcurrent conditions must last longer than t
D
in order to assert FLGB.
B
B
4
5
6
7
8
ENB
OUTB
GND
IN
OUTA
Switch B Enable (Input): Logic-compatible enable input. Active-high (-1) or
active-low (-2).
Switch B (Output)
Ground
Input: Switch and logic supply input.
Switch A (Output)
June 2010
2
M9999-060410-B
Micrel, Inc.
MIC2026/2076
Absolute Maximum Ratings
(1)
P
Operating Ratings
(2)
P
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
(3)
HBM ......................................................................... 1kV
MM .........................................................................200V
B
B
B
B
B
B
B
B
B
B
B
B
B
B
Supply Voltage (V
IN
) ..................................... +2.7V to +5.5V
Ambient Temperature (T
A
) .......................... –40°C to +85°C
Junction Temperature Range (T
J
) ............. Internally Limited
Thermal Resistance
SOIC (θ
JA
) ........................................................160°C/W
PDIP (θ
JA
) ........................................................105°C/W
B
B
B
B
B
B
B
B
B
B
Electrical Characteristics
(4)
P
V
IN
= +5V; T
A
= 25°C,
bold
values indicate –40°C
≤
T
A
≤
+85°C; unless noted
B
B
B
B
B
B
Symbol
I
DD
B
B
Parameter
Supply Current
Condition
MIC20x6-1, V
ENA
= V
ENB
≤
0.8V
(switch off), OUT = open
B
B
B
B
Min
Typ
0.75
9.5
100
100
1.7
Max
5
20
160
160
2.4
Units
µA
µA
µA
µA
V
V
mV
MIC20x6-2, V
ENA
= V
ENB
≥
2.4V
(switch off), OUT = open
B
B
B
B
MIC20x6-1, V
ENA
= V
ENB
≥
2.4V
(switch on), OUT = open
B
B
B
B
MIC20x6-2, V
ENA
= V
ENB
≤
0.8V
(switch on), OUT = open
B
B
B
B
V
EN
B
B
Enable Input Threshold
low-to-high transition
high-to-low transition
0.8
1.45
250
Enable Input Hysteresis
I
EN
B
B
Enable Input Current
Enable Input Capacitance
V
EN
= 0V to 5.5V
B
B
-1
0.01
1
1
µA
pF
R
DS(ON)
B
B
Switch Resistance
V
IN
= 5V, I
OUT
= 500mA
B
B
B
B
90
100
140
170
10
mΩ
mΩ
µA
µA
V
IN
= 3.3V, I
OUT
= 500mA
B
B
B
B
Output Leakage Current
OFF Current in Latched
Thermal Shutdown
t
ON
B
B
MIC20x6-1, V
ENx
≤
0.8V;
MIC20x6-1, V
ENx
≥
2.4V, (output off)
MIC2076
(during thermal shutdown state)
R
L
= 10Ω, C
L
= 1µF, see “Timing Diagrams”
B
B
B
B
50
1.3
0.5
1.15
1.75
35
32
0.5
0.65
0.9
1.0
20
100
100
1.25
1.25
5
4.9
Output Turn-On Delay
Output Turn-On Rise Time
ms
ms
ms
µs
µs
A
A
µs
t
R
B
B
R
L
= 10Ω, C
L
= 1µF, see “Timing Diagrams”
B
B
B
B
R
L
= 10Ω, C
L
= 1µF, see “Timing Diagrams”
B
B
B
B
t
OFF
B
B
Output Turn-Off Delay
Output Turn-Off Fall Time
B
R
L
= 10Ω, C
L
= 1µF, see “Timing Diagrams”
B
B
B
B
t
F
B
B
R
L
= 10Ω, C
L
= 1µF, see “Timing Diagrams”
B
B
B
B
I
LIMIT
B
Short-Circuit Output Current
Current-Limit Threshold
Short-Circuit Response Time
V
OUT
= 0V, enabled into short-circuit
B
B
ramped load applied to output
V
OUT
= 0V to I
OUT
= I
LIMIT
(short applied to output)
B
B
B
B
B
B
June 2010
3
M9999-060410-B
Micrel, Inc.
Symbol
t
D
Parameter
Overcurrent Flag Response
Delay
Undervoltage Lockout
Threshold
Error Flag Output Resistance
Condition
V
IN
= 5V, apply V
OUT
= 0V until FLG low
B
B
B
B
MIC2026/2076
Min
1.5
Typ
3
3
2.2
2.0
B
B
Max
7
Units
ms
ms
V
IN
= 3.3V, apply V
OUT
= 0V until FLG low
B
B
B
B
V
IN
rising
B
B
2.4
2.15
10
15
2.7
2.5
25
40
10
V
V
Ω
Ω
µA
°C
°C
°C
°C
V
IN
falling
B
B
I
L
= 10mA, V
IN
= 5V
B
B
I
L
= 10mA, V
IN
= 3.3V
B
B
B
B
Error Flag Off Current
Overtemperature Threshold
(5)
P
P
V
FLAG
= 5V
B
B
T
J
increasing, each switch
T
J
decreasing, each switch
B
B
B
B
140
120
160
150
T
J
increasing, both switches
T
J
decreasing, both switches
B
B
B
B
Notes:
1. Exceeding the absolute maximum rating may damage the device.
2. The device is not guaranteed to function outside its operating rating.
3. Devices are ESD sensitive. Handling precautions recommended.
4. Specification for packaged product only.
5. If there is a fault on one channel, that channel will shut down when the die reaches approximately 140°C. If the die reaches approximately 160°C,
both channels will shut down, even if neither channel is in current limit.
June 2010
4
M9999-060410-B
Micrel, Inc.
MIC2026/2076
Test Circuit
V
OUT
Device
Under OUT
Test
R
L
C
L
Timing Diagrams
t
R
V
OUT
10%
Output Rise and Fall Times
t
F
90%
90%
10%
V
EN
50%
t
OFF
t
ON
V
OUT
90%
10%
Active-Low Switch Delay Times (MIC20x6-2)
V
EN
50%
t
OFF
t
ON
90%
10%
Active-High Switch Delay Time (MIC20x6-1)
V
OUT
June 2010
5
M9999-060410-B
微控制器 MCU
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