MIC44F18/19/20
6A, 13V High Speed MOSFET Drivers
with Enable Input
General Description
The MIC44F18, MIC44F19 and MIC44F20 are high-
speed single MOSFET drivers capable of sinking and
sourcing 6A for driving capacitive loads. With delay
times of less than 15ns and rise times into a 1000pF
load of 10ns, these MOSFET drivers are ideal for driving
large gate charge MOSFETs in power supply
applications. The MIC44F18 is a non-inverting driver,
the MIC44F19 is an inverting driver suited for driving P-
Channel MOSFETs and the MIC44F20 is an inverting
driver for N-Channel MOSFETs.
Fabricated using Micrel’s proprietary BiCMOS/DMOS
process for low power consumption and high efficiency,
the MIC44F18/19/20 translates TTL or CMOS input logic
levels to output voltage levels that swing within 25mV of
the positive supply or ground. Comparable bipolar
devices are capable of swinging only to within 1V of the
supply.
The input supply voltage range of the MIC44F18/19/20
is 4.5V to 13.2V, making the devices suitable for driving
MOSFETs in a wide range of power applications. Other
features include an enable function, latch-up protection,
and a programmable UVLO function.
The MIC44F18/19/20 has a junction temperature range
of –40°C to +125°C with exposed pad ePAD MSOP-8
®
and 2mm x 2mm MLF -8 package options.
Data sheets and support documentation can be found
on Micrel’s web site at:
www.micrel.com.
Features
•
•
•
•
4.5V to 13.2V input operating range
6A peak output current
High accuracy ±5% enable input threshold
High speed switching capability
10ns rise time in 1000pF load
<15ns propagation delay time
Flexible UVLO function
4.2V internally set UVLO
Programmable with external resistors
Latch-up protection to >500mA reverse current on the
output pin
Enable function
Thermally enhanced ePAD MSOP-8 package option
Miniature 2mm x 2mm MLF
®
-8 package option
Pb-free packaging
•
•
•
•
•
•
Applications
•
Synchronous switch-mode power supplies
•
Secondary side synchronous rectification
Typical Applications
MOSFET Driver with 6.2V UVLO Externally Set
MOSFET Driver with 4.2V UVLO Internally Set
MLF and
MicroLeadFrame
are registered trademarks of Amkor Technologies, 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
February 2011
M9999-020111-B
Micrel, Inc.
MIC44F18/19/20
Ordering Information
Part Number
MIC44F18YML
MIC44F18YMME
MIC44F19YML
MIC44F19YMME
MIC44F20YML
MIC44F20YMME
Note:
1.
Marking
D12
Configuration
Non-Inverting
Non-Inverting
Junction
Temp. Range
–40°C to 125°C
–40°C to 125°C
–40°C to 125°C
–40°C to 125°C
–40°C to 125°C
–40°C to 125°C
Package
2x2 MLF-8
ePAD MSOP-8
2x2 MLF-8
ePAD MSOP-8
2x2 MLF-8
ePAD MSOP-8
Lead Finish
Pb-Free
Pb-Free
Pb-Free
Pb-Free
Pb-Free
Pb-Free
D13
Inverting Output high when disabled
Inverting Output high when disabled
D14
Inverting Output low when disabled
Inverting Output low when disabled
Over bar symbol may not be to scale.
Pin Configuration
OUT 1
VDD 2
NC 3
IN 4
EP
8 OUT
7 GND
6 GND
5 EN/UVLO
OUT 1
VDD 2
NC 3
IN 4
EP
8
7
6
5
OUT
GND
GND
EN/UVLO
8-Pin ePAD MSOP (MME)
8-Pin MLF (ML)
Pin Description
Pin Number
1,8
2
3
4
Pin Name
OUT
VDD
NC
IN
Pin Function
Driver Output
Supply Input
No Connect
Input (Input): Logic high produces a high output voltage for the MIC44F18 and a low output
voltage for the MIC44F19/20. Logic low produces a low output voltage for the MIC44F18 and
a high output voltage for the MIC44F19/20.
EN / Under-Voltage Lockout (Input): Pulling this pin below low disables the driver. When
disabled, the output is in the off state (low for the MIC44F18/20 and high for the MIC44F19).
Floating this pin enables the driver and the UVLO circuitry when V
DD
reaches the UVLO
threshold. A resistor divider can set a different UVLO threshold voltage as shown on page 1
(See “Application Information” section for more details).
Ground
Ground. Exposed Backside Pad.
5
EN/UVLO
6,7
EP
GND
GND
February 2011
2
M9999-020111
Micrel, Inc.
MIC44F18/19/20
Logic Table
EN/UVLO
0
0
1
1
IN
0
1
0
1
MIC44F18
OUTPUT
LOW
LOW
LOW
HI
MIC44F19
OUTPUT
HI
HI
HI
LOW
MIC44F20
OUTPUT
LOW
LOW
HI
LOW
February 2011
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M9999-020111
Micrel, Inc.
MIC44F18/19/20
Absolute Maximum Ratings
(1)
Supply Voltage (V
dd
). ………………………………….. 14V
UVLO/Enable Voltage (V
UVLO/EN
)…………………....... 14V
Input Voltage (V
IN
) …………… .. (V
S
+ 0.1V) to (GND-5V)
Output Voltage (V
OUT
) ……………………………........ 14V
Junction Temperature (T
J
)…………………... ..........150°C
Ambient Storage Temperature (T
dd
) …. . -65°C to +150°C
Lead Temperature (10 sec).....................................300°C
ESD Rating,
Note 3
Pins 1,2,3,5,6,7,8................................................. 2KV
Pin 4................................................................... 500V
Operating Ratings
(2)
Supply Voltage (V
dd
) ............................... 4.5V to 13.2V
Package Thermal Impedance
ePAD MSOP-8 (θ
JA
)……………………… ...78°C/W
2x2 MLF-8L (θ
JA
)…………………… ............93°C/W
Operating Junction Temperature (T
J
).................. 125°C
Electrical Characteristics
(4)
4.5V< V
dd
< 13.2V; C
L
=1000pf; T
A
= 25°C,
bold
values indicate –40°C< T
j
< +125°C, unless noted.
Symbol
Parameter
Condition
Min.
4.5
V
IN
= 5V (MIC44F18), V
IN
= 0V
(MIC44F19/20)
V
IN
= 0V (MIC44F18), V
IN
= 5V
(MIC44F19/20)
V
EN
= 0V
1.3
V
EN
= open
V
DD
rising
V
DD
rising
1.4
120
3.6
4.2
370
V
EN
(MAX)
Typ.
Max.
13.2
2.5
2.5
200
1.5
Units
V
mA
mA
µA
V
mV
Power Supply
V
dd
Supply Voltage Range
High Output Quiescent Current
I
S
Low Output Quiescent Current
I
SD
EN/UVLO
V
EN
Shutdown Current
Enable Threshold
Enable Hysteresis
V
UVLO
Under-Voltage Lockout
Threshold (Internally Set)
UVLO Hysteresis
V
UVLO
Input
V
IN
V
IH
V
IL
I
IN
Under-Voltage Lockout
Threshold (Externally Set)
Input Voltage Range
Logic 1 Input Voltage
Logic 0 Input Voltage
Input Current
4.4
V
mV
V
dd
V
Steady State Voltage (note 5)
T
A
= 25°C (+/-5%)
Over temperature range
(+/-10%)
T
A
= 25°C (+/-5%)
Over temperature range
(+/-10%)
4.5V< V
IN
< 10V
0
1.615
1.53
1.45
1.377
1.7
1.7
1.53
1.53
Vdd
1.785
1.87
1.607
1.683
5
V
V
µA
February 2011
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M9999-020111
Micrel, Inc.
MIC44F18/19/20
Electrical Characteristics (Continued)
4.5V< V
dd
< 13.2V; C
L
=1000pf; T
A
= 25°C,
bold
values indicate –40°C< T
j
< +125°C, unless noted.
Symbol
Output
V
OH
V
OL
High Output Voltage
Low Output Voltage
Output Resistance, Output High
R
O
Output Resistance, Output Low
I
PEAK
I
R
Peak Output Sink Current
Peak Output Source Current
Latch-Up Protection Withstand
Reverse Current
V
S
= 12V, C
L
=1000pF
See Timing Diagram
V
S
= 12V, C
L
=1000pF
See Timing Diagram
V
S
= 12V, C
L
=1000pF
See Timing Diagram
V
S
= 12V, C
L
=1000pF
See Timing Diagram
V
S
= 12V
See Timing Diagram
V
S
= 12V
See Timing Diagram 2
50
Note 6
See Figure 1
See Figure 1
I
OUT
= 100mA, V
dd
= 12V
I
OUT
= 100mA, V
dd
= 5V
I
OUT
= 100mA, V
dd
= 12V
I
OUT
= 100mA, V
dd
= 5V
V
dd
= 12V
V
S
= 12V
6
6
>500
V
S
-
0.025
0.025
2
3
2
3
V
V
Ω
Ω
A
A
mA
Parameter
Condition
Min.
Typ.
Max.
Units
Switching Time
t
R
t
F
t
D1
t
D2
t
PW
f
MAX
Rise Time
Fall Time
Delay Time
Delay Time
Pulse Width
Maximum Input Frequency
10
10
15
13
20
20
35
35
ns
ns
ns
ns
ns
MHz
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. Human body model, 1.5k in series with 100pF.
4. Specification for packaged product only.
5. The device is protected from damage when -5V< Vin< 0V. However, 0V is the recommended minimum continuous V
IL
voltage.
See the applications section for additional information.
6. See applications section for information on the maximum operating frequency.
February 2011
5
M9999-020111
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