6A, 12.6V High Speed MOSFET Drivers with Enable Input

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 2017 Microchip Technology Inc.

DS20005900A-page 1

MIC44F18/19/20

Features

• 4.5V to 12.6V Input Operating Range
• 6A Peak Output Current
• High Accuracy ±5% Enable Input Threshold
• High Speed Switching Capability

- 10 ns Rise Time in 1000 pF Load
- <15 ns Propagation Delay Time

• Flexible UVLO Function

- 4.2V Internally Set UVLO
- Programmable with External Resistors

• Latch-Up Protection to >500 mA Reverse Current 

on the Output Pin

• Enable Function
• Thermally Enhanced ePAD MSOP-8 Package 

Option

• Miniature 2 mm x 2 mm DFN-8 Package Option
• Pb-Free Packaging

Applications

• Synchronous Switch-Mode Power Supplies
• Secondary Side Synchronous Rectification

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 15 ns and rise times into a 1000 pF
load of 10 ns, 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 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 25 mV
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 12.6V, 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 2 mm x 2 mm DFN-8 package options.

Package Types

Please see pin descriptions in 

Table 3-1

.

IN

EN/UVLO

5

4

OUT

VDD

NC

OUT

GND

GND

8

7

6

1

2

3

EP

8-Pin ePAD MSOP

(MME)

IN

EN/UVLO

4

OUT

VDD

NC

OUT

GND

GND

8

7

6

1

2

3

5

EP

8-Pin 2 mm x 2 mm DFN

(ML)

6A, 12.6V High Speed MOSFET Drivers with Enable Input

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MIC44F18/19/20

DS20005900A-page 2

 2017 Microchip Technology Inc.

Typical Application Circuits

Functional Block Diagram

Input

600

240

VDD

EN/
UVLO

MIC44F18

IN

OUT

GND

4.5V to

12.6V

DRIV ER

40

10

EN/UVLO

DRIVER

MOSFET Driver with 6.2V UVLO Externally Set

Input

600

240

VDD

EN/
UVLO

MIC44F18

IN

OUT

GND

4.5V to

12.6V

DRIV ER

EN/UVLO

DRIVER

MOSFET Driver with 4.2V UVLO Internally Set

MIC4419/20:

Inverting

MIC4418:

Non-Inverting

OUT

VDD

EN/UVLO

VIN

(Control Input)

GND

EN/UVLO

and

Control

Input

OUT

GND

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DS20005900A-page 3

MIC44F18/19/20

1.0

ELECTRICAL CHARACTERISTICS

Absolute Maximum Ratings †

Supply Voltage (V

DD

) ................................................................................................................................................+13V

UVLO/Enable Voltage (V

UVLO/EN

).............................................................................................................................+13V

Input Voltage (V

IN

) .................................................................................................................. (V

S

 + 0.1V) to (GND – 5V)

Output Voltage (V

OUT

) ..............................................................................................................................................+13V

ESD Rating (

Note 1

)

Pins 1, 2, 3, 5, 6, 7, 8 ................................................................................................................................................. 2 kV
Pin 4..........................................................................................................................................................................500V

Operating Ratings ‡

Supply Voltage (V

DD

) .............................................................................................................................. +4.5V to +12.6V

 Notice: Stresses above those listed under “Absolute Maximum Ratings” may cause permanent damage to the device.

This is a stress rating only and functional operation of the device at those or any other conditions above those indicated
in the operational sections of this specification is not intended. Exposure to maximum rating conditions for extended
periods may affect device reliability.
‡ Notice:

 The device is not guaranteed to function outside its operating ratings.

Note 1:

Devices are ESD sensitive. Handling precautions are recommended. Human body model, 1.5 kΩ in series
with 100 pF.

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MIC44F18/19/20

DS20005900A-page 4

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TABLE 1-1:

ELECTRICAL CHARACTERISTICS

Electrical Characteristics:

 4.5V ≤ V

DD

 ≤ 12.6V, C

L

 = 1000 pF; T

A

 = +25°C. 

Bold

 values indicate –40°C ≤ T

J

 ≤ +125°C. 

Note 1

Parameter

Symbol

Min.

Typ.

Max.

Units

Conditions

Power Supply
Supply Voltage Range

V

DD

4.5

12.6

V

High Output Quiescent 
Current

I

S

2.5

mA

V

IN

 = 5V (MIC44F18), 

V

IN

 = 0V (MIC44F19/20)

Low Output Quiescent 
Current

2.5

V

IN

 = 0V (MIC44F18), 

V

IN

 = 5V (MIC44F19/20)

Shutdown Current

I

SD

200

µA

V

EN

 = 0V

EN/UVLO
Enable Threshold

V

EN

1.3

1.4

1.5

V

Enable Hysteresis

V

EN_HYS

120

mV

Undervoltage Lockout 
Threshold (Internally Set)

V

UVLO

3.6

4.2

4.4

V

V

EN

 = open, V

DD

 rising.

UVLO Hysteresis

370

mV

Undervoltage Lockout 
Threshold (Externally Set)

V

UVLO

V

EN(MAX)

V

DD

V

V

DD

 rising

Input
Input Voltage Range

V

IN

0

V

DD

V

Steady State Voltage, 

Note 2

Logic 1 Input Voltage

V

IH

1.615

1.7

1.785

V

T

A

 = +25°C (±5%)

1.53

1.7

1.87

Over temperature range (±10%)

Logic 0 Input Voltage

V

IL

1.45

1.53

1.607

V

T

A

 = +25°C (±5%)

1.377

1.53

1.683

Over temperature range (±10%)

Input Current

I

IN

5

µA

4.5V ≤ V

IN

 ≤ 10V

Output

Output High Voltage

V

OH

V

S

 – 

0.025

V

See 

Functional Block Diagram

Output Low Voltage

V

OL

0.025

V

See 

Functional Block Diagram

Output Resistance, Output 
High

R

O

2

I

OUT

 = 100 mA, V

DD

 = 12V

3

I

OUT

 = 100 mA, V

DD

 = 5V

Output Resistance, Output 
Low

2

I

OUT

 = 100 mA, V

DD

 = 12V

3

I

OUT

 = 100 mA, V

DD

 = 5V

Peak Output Sink Current

I

PEAK

6

A

V

DD

 = 12V

Peak Output Source Current

6

A

V

S

 = 12V

Latch-Up Protection 
Withstand Reverse Current

I

R

>500

mA

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DS20005900A-page 5

MIC44F18/19/20

Switching Time

Rise Time

t

R

10

20

ns

V

S

 = 12V, C

L

 = 1000 pF

See Timing Diagram

Fall Time

t

F

10

20

ns

V

S

 = 12V, C

L

 = 1000 pF

See Timing Diagram

Delay Time

t

D1

15

35

ns

V

S

 = 12V, C

L

 = 1000 pF

See Timing Diagram

Delay Time

t

D2

13

35

ns

V

S

 = 12V, C

L

 = 1000 pF

See Timing Diagram

Pulse Width

t

PW

50

ns

V

S

 = 12V, See Timing Diagram

Maximum Input Frequency

f

MAX

Note 3

MHz

V

S

 = 12V, See Timing Diagram 2

Note 1:

Specification for packaged product only

2:

The device is protected from damage when –5V< V

IN

< 0V. However, 0V is the recommended minimum 

continuous V

IL

 voltage. See the Application Information section for additional information.

3:

See Application Information section for information on the maximum operating frequency.

TABLE 1-1:

ELECTRICAL CHARACTERISTICS (CONTINUED)

Electrical Characteristics:

 4.5V ≤ V

DD

 ≤ 12.6V, C

L

 = 1000 pF; T

A

 = +25°C. 

Bold

 values indicate –40°C ≤ T

J

 ≤ +125°C. 

Note 1

Parameter

Symbol

Min.

Typ.

Max.

Units

Conditions

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MIC44F18/19/20

DS20005900A-page 6

 2017 Microchip Technology Inc.

TEMPERATURE SPECIFICATIONS (

Note 1

)

Parameters

Sym.

Min.

Typ.

Max.

Units

Conditions

Temperature Ranges
Operating Junction Temperature

T

J

+125

°C

Maximum Junction Temperature

+150

°C

Storage Temperature Range

T

DD

–65

+150

°C

Lead Temperature

+300

°C

Soldering, 10s

Package Thermal Resistances
Thermal Resistance ePAD MSOP-8

JA

78

°C/W

Thermal Resistance 3x3 DFN-8Ld

JA

93

°C/W

Note 1:

The maximum allowable power dissipation is a function of ambient temperature, the maximum allowable 
junction temperature and the thermal resistance from junction to air (i.e., T

A

, T

J

JA

). Exceeding the 

maximum allowable power dissipation will cause the device operating junction temperature to exceed the 
maximum +125°C rating. Sustained junction temperatures above +125°C can impact the device reliability.

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DS20005900A-page 7

MIC44F18/19/20

2.0

TYPICAL PERFORMANCE CURVES

FIGURE 2-1:

IN Threshold vs. Supply 

Voltage.

FIGURE 2-2:

IN Threshold vs. 

Temperature.

FIGURE 2-3:

Enable Threshold vs. 

Supply Voltage.

FIGURE 2-4:

Enable Threshold vs. 

Temperature.

FIGURE 2-5:

Quiescent Current vs. 

Supply Voltage.

FIGURE 2-6:

Quiescent Current vs. 

Supply Voltage.

Note:

The graphs and tables provided following this note are a statistical summary based on a limited number of
samples and are provided for informational purposes only. The performance characteristics listed herein
are not tested or guaranteed. In some graphs or tables, the data presented may be outside the specified
operating range (e.g., outside specified power supply range) and therefore outside the warranted range.

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MIC44F18/19/20

DS20005900A-page 8

 2017 Microchip Technology Inc.

FIGURE 2-7:

Quiescent Current vs. 

Temperature.

FIGURE 2-8:

Quiescent Current vs. 

Frequency.

FIGURE 2-9:

Quiescent Current vs. 

Capacitive Load.

FIGURE 2-10:

Rise and Fall Time vs. 

Supply Voltage.

FIGURE 2-11:

Rise and Fall Time (5V) vs. 

Temperature.

FIGURE 2-12:

Rise and Fall Time (12V) vs. 

Temperature.

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DS20005900A-page 9

MIC44F18/19/20

FIGURE 2-13:

Propagation Delay vs. 

Supply Voltage.

FIGURE 2-14:

Propagation Delay (5V) vs. 

Temperature.

FIGURE 2-15:

Propagation Delay (12V) vs. 

Temperature.

FIGURE 2-16:

Rise and Fall Time (5V) vs. 

Capacitive Load.

FIGURE 2-17:

Rise and Fall Time (12V) vs. 

Capacitive Load.

FIGURE 2-18:

Output Impedance (5V) vs. 

Temperature.

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MIC44F18/19/20

DS20005900A-page 10

 2017 Microchip Technology Inc.

FIGURE 2-19:

Output Impedance (12V) vs. 

Temperature

.

Timing Diagram

D2

 

t

D1

 

50% 

threshold

 

t

F

 

t

R

 

Out 

V

IN

 

90% 

10% 

t

PW

 

t

D2

 

t

D1

 

50% 

V

IN

threshold

 

t

F

 

t

R

 

90% 

10% 

t

PW

 

Out 

V

IN

 

V

IN

t

Maker
Microchip Technology Inc.