MIC2026/2076
Micrel
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 shut-
down 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-lead SOP.
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 asser-
tions (MIC2026A/2076A with 10ms filter)
Undervoltwww.sony.com/clieage 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
Applications
•
•
•
•
•
•
USB peripherals
General purpose power switching
ACPI power distribution
Notebook PCs
PDAs
PC card hot swap
Typical Application
V
CONT.
10k
10k
Logic Controller
VIN
ON/OFF
OVERCURRENT
OVERCURRENT
ON/OFF
MIC2026-2
ENA
FLGA
FLGB
ENB
OUTA
IN
GND
OUTB
Load
0.1µF
Load
V
CC
2.7V to 5.5V
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
February 1, 2001
1
MIC2026/2076
MIC2026/2076
Micrel
Ordering Information
Part Number
MIC2026x-1BM
MIC2026x-2BM
MIC2026x-1BN
MIC2026x-2BN
MIC2076x-1BM
MIC2076x-2BM
MIC2076x-1BN
MIC2076x-2BN
Enable
Active High
Active Low
Active High
Active Low
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
–40°C to +85°C
–40°C to +85°C
–40°C to +85°C
–40°C to +85°C
Package
8-lead SOP
8-lead SOP
8-pin DIP
8-pin DIP
8-lead SOP
8-lead SOP
8-pin DIP
8-pin DIP
Note. x=A; optional part that includes a 10ms Fault status delay filter. No ‘x’ denotes standard part.
Pin Configuration
MIC2026/76
ENA
FLGA
FLGB
ENB
1
2
3
4
8
7
6
5
OUTA
IN
GND
OUTB
8-Lead SOP (BM)
8-Pin DIP (BN)
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.
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.
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)
3
FLGB
4
5
6
7
8
ENB
OUTB
GND
IN
OUTA
MIC2026/2076
2
February 1, 2001
MIC2026/2076
Micrel
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 Range (T
J
) ........... Internally Limited
Thermal Resistance
SOP (θ
JA
) .......................................................... 160°C/W
DIP(θ
JA
) ............................................................. 105°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
Supply Current
Condition
MIC20x6-1, V
ENA
= V
ENB
≤
0.8V
(switch off), OUT = open
MIC20x6-2, V
ENA
= V
ENB
≥
2.4V
(switch off), OUT = open
MIC20x6-1, V
ENA
= V
ENB
≥
2.4V
(switch on), OUT = open
MIC20x6-2, V
ENA
= V
ENB
≤
0.8V
(switch on), OUT = open
V
EN
Enable Input Threshold
low-to-high transition
high-to-low transition
Enable Input Hysteresis
I
EN
R
DS(on)
Enable Input Current
Enable Input Capacitance
Switch Resistance
V
IN
= 5V, I
OUT
= 500mA
V
IN
= 3.3V, I
OUT
= 500mA
Output Leakage Current
OFF Current in
Latched Thermal Shutdown
t
ON
t
R
Output Turn-On Delay
Output Turn-On Rise Time
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”
R
L
= 10Ω, C
L
= 1µF, see “Timing Diagrams”
R
L
= 10Ω, C
L
= 1µF, see “Timing Diagrams”
MIC2026A/MIC2076A
t
OFF
t
F
I
LIMIT
Output Turn-Off Delay
Output Turn-Off Fall Time
Short-Circuit Output Current
Current-Limit Threshold
Short-Circuit Response Time
t
D
Overcurrent Flag Response
Delay
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
ramped load applied to output
V
OUT
= 0V to I
OUT
= I
LIMIT
(short applied to output)
V
IN
= 5V, apply V
OUT
= 0V until FLG low
V
IN
= 3.3V, apply V
OUT
= 0V until FLG l ow
V
IN
= 5V, apply V
OUT
= 0V until FLG low
MIC2026A/MIC2076A
1.5
0.5
0.5
50
1.3
1.15
1.75
35
32
0.9
1.0
20
3
3
10
7
100
100
1.25
1.25
5
4.9
V
EN
= 0V to 5.5V
–1
0.8
Min
Typ
0.75
0.75
100
100
1.7
1.45
250
0.01
1
90
100
140
170
10
1
Max
5
5
160
160
2.4
Units
µA
µA
µA
µA
V
V
mV
µA
pF
mΩ
mΩ
µA
µA
ms
ms
ms
µs
µs
A
A
µs
ms
ms
ms
February 1, 2001
3
MIC2026/2076
MIC2026/2076
Symbol
Parameter
Undervoltage Lockout
Threshold
Error Flag Output
Resistance
Error Flag Off Current
Overtemperature Threshold
Note 4
Condition
V
IN
rising
V
IN
falling
I
L
= 10mA, V
IN
= 5V
I
L
= 10mA, V
IN
= 3.3V
V
FLAG
= 5V
T
J
increasing, each switch
T
J
decreasing, each switch
T
J
increasing, both switches
T
J
decreasing, both switches
Note 1.
Note 2.
Note 3.
Note 4.
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.
Micrel
Min
2.2
2.0
Typ
2.4
2.15
10
15
Max
2.7
2.5
25
40
10
140
120
160
150
Units
V
V
Ω
Ω
µA
°C
°C
°C
°C
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.
Test Circuit
V
OUT
Device
Under OUT
Test
R
L
C
L
Timing Diagrams
t
R
V
OUT
10%
90%
90%
10%
t
F
Output Rise and Fall Times
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
V
OUT
90%
10%
Active-High Switch Delay Times (MIC20x6-1)
MIC2026/2076
4
February 1, 2001
MIC2026/2076
Micrel
Supply On-Current
vs. Temperature
180
ON-RESISTANCE (mΩ)
On-Resistance
vs. Temperature
160
140
RISE TIME (ms)
Turn-On Rise Time
vs. Temperature
5
160
140
CURRENT (µA)
120
100
80
60
40
20
0
-40 -20 0 20 40 60 80 100
TEMPERATURE (°C)
3.3V
5V
120
100
80
60
40
20
3.3V
4
3
2
1
V
IN
= 5V
0
-40 -20 0 20 40 60 80 100
TEMPERATURE (°C)
V
IN
= 3.3V
R
L
=10Ω
C
L
=1µF
5V
I
OUT
= 500mA
0
-40 -20 0 20 40 60 80 100
TEMPERATURE (°C)
Supply On-Current
vs. Input Voltage
200
200
On-Resistance
vs. Input Voltage
2.5
2.0
+85°C
+25°C
100
-40°C
50
I
OUT
= 500mA
RISE TIME (ms)
Turn-On Rise Time
vs. Input Voltage
CURRENT (µA)
150
RESISTANCE (mΩ)
-40°C
150
+85°C
1.5
1.0
0.5
0
2.5
-40°C
R
L
=10Ω
C
L
=1µF
3.0 3.5 4.0 4.5 5.0
INPUT VOLTAGE (V)
5.5
+25°C
100
+25°C
50
+85°C
0
2.5
3.0 3.5 4.0 4.5 5.0
INPUT VOLTAGE (V)
5.5
0
2.5
3.0 3.5 4.0 4.5 5.0
INPUT VOLTAGE (V)
5.5
1000
CURRENT LIMIT THRESHOLD (mA)
Short-Circuit Current-Limit
vs. Temperature
CURRENT LIMIT (mA)
Current-Limit Threshold
vs. Temperature
1200
V
IN
= 5V
1000
800
600
400
200
0
-40 -20 0 20 40 60 80 100
TEMPERATURE (°C)
V
IN
= 3.3V
FALL TIME (µs)
300
400
Fall Time
vs. Temperature
800
600
V
IN
= 3.3V
V
IN
= 3.3V
200
V
IN
= 5V
400
200
0
-40 -20 0 20 40 60 80 100
TEMPERATURE (°C)
R
L
=10Ω
C
L
=1µF
100
0
-40 -20 0 20 40 60 80 100
TEMPERATURE (°C)
CURRENT LIMIT THRESHOLD (mA)
Short-Circuit Current-Limit
vs. Input Voltage
800
700
1200
1000
800
600
400
200
0
2.5
Current-Limit Threshold
vs. Input Voltage
300
250
RISE TIME (µs)
+85°C
+25°C
-40°C
200
150
100
50
3.0 3.5 4.0 4.5 5.0
INPUT VOLTAGE (V)
5.5
0
2.5
Fall Time
vs. Input Voltage
CURRENT LIMIT (mA)
600
500 +85°C
400
300
200
100
0
2.5
3.0 3.5 4.0 4.5 5.0
INPUT VOLTAGE (V)
5.5
+25°C
-40°C
T
A
= 25°C
C
L
= 1µF
R
L
= 10Ω
3.0 3.5 4.0 4.5 5.0
INPUT VOLTAGE (V)
5.5
February 1, 2001
5
MIC2026/2076
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