MIC5013
Micrel, Inc.
MIC5013
Protected High- or Low-Side MOSFET Driver
General Description
The MIC5013 is an 8-pin MOSFET driver with over-current
shutdown and a fault flag. It is designed to drive the gate of
an N-channel power MOSFET above the supply rail high-side
power switch applications. The MIC5013 is compatible with
standard or current-sensing power MOSFETs in both high-
and low-side driver topologies.
The MIC5013 charges a 1nF load in 60µs typical and protects
the MOSFET from over-current conditions. The current sense
trip point is fully programmable and a dynamic threshold
allows high in-rush current loads to be started. A fault pin
indicates when the MIC5013 has turned off the FET due to
excessive current.
Other members of the Micrel driver family include the MIC5011
minimum parts count driver and MIC5012 dual driver.
Features
•
•
•
•
•
•
•
•
•
•
7V to 32V operation
Less than 1µA standby current in the “OFF” state
Available in small outline SOIC packages
Internal charge pump to drive the gate of an N-channel
power FET above supply
Internal zener clamp for gate protection
60µs typical turn-on time to 50% gate overdrive
Programmable over-current sensing
Dynamic current threshold for high in-rush loads
Fault output pin indicates current faults
Implements high- or low-side switches
Applications
•
•
•
•
•
Lamp drivers
Relay and solenoid drivers
Heater switching
Power bus switching
Motion control
Typical Application
Ordering Information
Part Number
Standard
MIC5013BN
+
V
=24V
Pb-Free
MIC5013YN
Temperature
Range
–40ºC to +85ºC
Package
8-pin Plastic
DIP
8-pin SOIC
MIC5013BM MIC5013YM –40ºC to +85ºC
Control Input
Fault 8
2
Thresh
V+ 7
20kΩ
3
Sense
Gate 6
R
TH
1
Input
MIC5013
10µF
+
R =
S
SR(
V
TR I P
+100mV)
+100mV)
4
Source
Gnd 5
R I
L
– (
V
IRCZ44
(S=2590,
R=11mΩ)
SENSE
R1=
V+
S R R
S
100mV (SR+ R
S
)
TR I P
R
S
SOURCE
R
TH
=
2200
43Ω
KEL VIN
LOAD
V
–1000
TR I P
R1
4.3kΩ
For this example:
I =30A (trip current)
L
V
TR I P
=100mV
Figure 1. High-Side Driver with
Current-Sensing MOSFET
Note: The MIC5013 is ESD sensitive.
Protected under one or more of the following Micrel patents:
patent #4,951,101; patent #4,914,546
Micrel, Inc. • 2180 Fortune Drive • San Jose, CA 95131 • USA • tel + 1 (408) 944-0800 • fax + 1 (408) 474-1000 • http://www.micrel.com
July 2005
1
MIC5013
MIC5013
Micrel, Inc.
–10 to V
+
–0.5 to +5V
–10V to V
+
–10V to V
+
50mA
–1V to 50V
–0.5V to 36V
–1mA to +1mA
150°C
Absolute Maximum Ratings
(Note 1, 2)
Input Voltage, Pin 1
Threshold Voltage, Pin 2
Sense Voltage, Pin 3
Source Voltage, Pin 4
Current into Pin 4
Gate Voltage, Pin 6
Supply Voltage (V
+
), Pin 7
Fault Output Current, Pin 8
Junction Temperature
Operating Ratings
(Notes 1, 2)
Power Dissipation
θ
JA
(Plastic DIP)
θ
JA
(SOIC)
Ambient Temperature: B version
Storage Temperature
Lead Temperature
(Soldering, 10 seconds)
Supply Voltage (V
+
), Pin 7
1.25W
100°C/W
170°C/W
–40°C to +85°C
–65°C to +150°C
260°C
7V to 32V high side
7V to 15V low side
Pin Description
(Refer to Figures 1 and 2)
Pin Number
1
2
Pin Name
Input
Threshold
Pin Function
Resets current sense latch and turns on power MOSFET when taken above
threshold (3.5V typical). Pin 1 requires <1µA to switch.
Sets current sense trip voltage according to:
V
TR I P
=
2200
R
TH
+ 1000
where R
TH
to ground is 3.3k to 20kΩ. Adding capacitor C
TH
increases the
trip voltage at turn-on to 2V. Use C
TH
=10µF for a 10ms turn-on time con-
stant.
3
Sense
The sense pin causes the current sense to trip when V
SENSE
is V
TRIP
above
V
SOURCE
. Pin 3 is used in conjunction with a current shunt in the source of
a 3 lead FET or a resistor R
S
in the sense lead of a current sensing FET.
Reference for the current sense voltage on pin 3 and return for the gate
clamp zener. Connect to the load side of current shunt or kelvin lead of cur-
rent sensing FET. Pins 3 and 4 can safely swing to –10V when turning off
inductive loads.
4
Source
5
6
7
8
Ground
Gate
V
+
Fault
Drives and clamps the gate of the power FET. Pin 6 will be clamped to ap-
proximately –0.7V by an internal diode when turning off inductive loads.
Supply pin; must be decoupled to isolate from large transients caused by
the power FET drain. 10µF is recommended close to pins 7 and 5.
Outputs status of protection circuit when pin 1 is high. Fault low indicates
normal operation; fault high indicates current sense tripped.
Pin Configuration
Fault 8
2
7
Thresh
V+
3
Sense
Gate 6
4
Source
Gnd 5
1
MIC5013
Input
MIC5013
2
July 2005
MIC5013
Micrel, Inc.
Electrical Characteristics
(Note 3, 5)
Test circuit. T
A
= –55°C to +125°C, V
+
= 15V
, all switches open, unless otherwise specified.
Parameter
Supply Current, I
7
Logic Input Voltage, V
IN
Conditions
V
+
= 32V
V
+
= 4.75V
V
+
Logic Input Current, I
1
Input Capacitance
Gate Drive, V
GATE
Zener Clamp,
Gate Turn-on Time, t
ON
µs
(Note 4)
Gate Turn-off Time, t
OFF
Threshold Bias Voltage, V
2
V
SENSE
– V
SOURCE
V
GATE
– V
SOURCE
=15V
V
IN
= 0V, S4 closed
Adjust V
IN
for V
GATE
low
V
IN
= V
S
= 32V
Min
Typical
0.1
8
4.5
5.0
–1
1
5
13
24
11
11
15
27
12.5
13
15
16
60
Max
10
20
2
Units
µA
mA
V
V
V
µA
µA
pF
V
V
V
V
200
V+ = 32V
Pin 1
S1, S2 closed,
V
S
= V+, V
IN
= 5V
S2 closed, V
IN
= 5V
V
IN
= 0V
Adjust V
IN
for V
GATE
high
Adjust V
IN
for V
GATE
high
V
IN
= 32V
V
+
= 7V, I
6
= 0
V
+
= 15V, I
6
= 100 µA
V
+
V+ = 15V, V
S
= 15V
= 32V, V
S
= 32V
V
IN
switched from 0 to 5V; measure time
V
IN
switched from 5 to 0V; measure time
for V
GATE
to reach 1V
I
2
= 200 µA
Increase I
3
S2 closed, V
IN
= 5V,
V
+
= 7V,
for V
GATE
to reach 20V
4
1.7
S4 closed
V
S
= 4.9V, S4 open
S4 closed
V
S
= 11.8V, S4 open
V
S
= 25.5V, S4 open
V
S
= 0V, S4 open
75
70
150
140
360
350
1.6
2
105
100
210
200
520
500
2.1
0.4
14
14.6
10
2.2
135
130
270
260
680
650
µs
V
mV
mV
mV
mV
mV
mV
V
Current Sense Trip Voltage,
V
+
= 15V
V
+
= 32V
I
2
= 100 µA
I
2
= 200 µA
Peak Current Trip Voltage,
V
SENSE
– V
SOURCE
Fault Output Voltage, V
8
V
IN
= 0V, I
8
= –100 µA
S3, S4 closed,
V
+
= 15V, V
IN
= 5V
I
2
= 500 µA
1
V
V
V
IN
= 5V, I
8
= 100 µA, current sense tripped
Note 1.
Note 2.
Note 3.
Note 4.
Note 5.
Absolute Maximum Ratings
indicate limits beyond which damage to the device may occur. Electrical specifications do not apply when
operating the device beyond its specified
Operating Ratings.
The MIC5010 is ESD sensitive.
Minimum and maximum
Electrical Characteristics
are 100% tested at T
A
= 25°C and T
A
= 85°C, and 100% guaranteed over the entire
range. Typicals are characterized at 25°C and represent the most likely parametric norm.
Test conditions reflect worst case high-side driver performance. Low-side and bootstrapped topologies are significantly faster—see
Applications Information.
Specification for packaged product only.
July 2005
3
MIC5013
MIC5013
Micrel, Inc.
Test Circuit
V+
I3
+ 1µF
V
IN
50Ω
500Ω
1W
S4
S2
1
Input
Fault 8
2
Thresh
V+ 7
3
Sense
Gate 6
4
Source
Gnd 5
3.5k
MIC5013
V
GATE
I8
1nF
S 1
I6
S 3 I2
VS
Typical Characteristics
Supply Current
DC Gate Voltage
above Supply
12
14
12
SUPPLY CURRENT (mA)
10
VGATE – V+ (V)
8
6
4
2
0
0
5
10
15
20
25
30
35
10
8
6
4
2
0
0
3
6
9
12
15
SUPPLY VOLTAGE (V)
SUPPLY VOLTAGE (V)
High-side Turn-on Time*
350
3.5
High-side Turn-on Time*
TURN-ON TIME (mS)
3.0
2.5
2.0
1.5
1.0
0.5
CGATE =10 nF
300
TURN-ON TIME (µS)
250
200
150
100
50
0
0
3
6
CGATE =1 nF
9
12
15
0
0
3
6
9
12
15
SUPPLY VOLTAGE (V)
MIC5013
4
SUPPLY VOLTAGE (V)
July 2005
* Time for gate to reach V
+
+ 5V in test circuit with VS = V
+
– 5V (prevents gate clamp from interfering with measurement).
MIC5013
Micrel, Inc.
Typical Characteristics
(Continued)
1000
Low-side Turn-on Time
for Gate = 5V
3000
CGATE =10 nF
Low-side Turn-on Time
for Gate = 10V
CGATE =10 nF
TURN-ON TIME (µS)
100
30
10
3
1
0
3
6
9
12
15
CGATE =1 nF
TURN-ON TIME (µS)
300
1000
300
100
30
10
3
0
3
6
CGATE =1 nF
9
12
15
SUPPLY VOLTAGE (V)
SUPPLY VOLTAGE (V)
Turn-off Time
NORMALIZED TURN-ON TIME
50
2.0
1.75
1.5
1.25
1.0
0.75
0.5
–25
0
Turn-on Time
TURN-OFF TIME (µS)
40
30
20
10
0
0
CGATE =10 nF
CGATE =1 nF
3
6
9
12
15
25
50
75
100 125
SUPPLY VOLTAGE (V)
DIE TEMPERATURE (°C)
CHARGE-PUMP CURRENT (µA)
250
200
150
100
50
Charge Pump
Output Current
VGATE =V+
VGATE =V++5V
VS=V +–5V
0
0
5
10
15
20
25
30
SUPPLY VOLTAGE (V)
July 2005
5
MIC5013
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