MIC4120/4129
Micrel, Inc.
MIC4120/4129
6A-Peak Low-Side MOSFET Driver
Bipolar/CMOS/DMOS Process
General Description
MIC4120 and MIC4129 MOSFET drivers are resilient,
efficient, and easy to use. The MIC4129 is an inverting
driver, while the MIC4120 is a non-inverting driver. The
MIC4120 and MIC4129 are improved versions of the
MIC4420 and MIC4429.
The drivers are capable of 6A (peak) output and can drive
the largest MOSFETs with an improved safe operating
margin. The MIC4120/4129 accept any logic input from
2.4V to V
S
without external speed-up capacitors or resis-
tor networks. Proprietary circuits allow the input to swing
negative by as much as 5V without damaging the part. Ad-
ditional circuits protect against damage from electrostatic
discharge.
MIC4120/4129 drivers can replace three or more discrete
components, reducing PCB area requirements, simplifying
product design, and reducing assembly cost.
Modern BiCMOS/DMOS construction guarantees freedom
from latch-up. The rail-to-rail swing capability insures ad-
equate gate voltage to the MOSFET during power up/down
sequencing.
Features
• CMOS Construction
• Latch-Up Protected: Will Withstand >200mA
Reverse Output Current
• Logic Input Withstands Negative Swing of Up to 5V
• Matched Rise and Fall Times ................................ 25ns
• High Peak Output Current ............................... 6A Peak
• Wide Operating Range ............................... 4.5V to 20V
• High Capacitive Load Drive ............................10,000pF
• Low Delay Time .............................................. 55ns Typ
• Logic High Input for Any Voltage From 2.4V to V
S
• Low Equivalent Input Capacitance (typ) ..................6pF
• Low Supply Current ...............450µA With Logic 1 Input
• Low Output Impedance ......................................... 2.5Ω
• Output Voltage Swing Within 25mV of Ground or V
S
• Exposed backside pad packaging reduces heat
- ePAD SOIC-8L (θ
JA
= 58°C/W
)
- 3mm x 3mm MFL™-8L
(θ
JA
= 60°C/W
)
Applications
•
•
•
•
Switch Mode Power Supplies
Motor Controls
Pulse Transformer Driver
Class-D Switching Amplifiers
Functional Diagram
V
S
0.1mA
0.4mA
MIC4129
IN V E R T I N G
OUT
IN
2kΩ
MIC4120
NONINVERTING
GND
Micrel, Inc. • 2180 Fortune Drive • San Jose, CA 95131 • USA • tel + 1 (408) 944-0800 • fax + 1 (408) 474-1000 • http://www.micrel.com
August 2005
1
M9999-081105
MIC4120/4129
Micrel, Inc.
Absolute Maximum Ratings
(Notes 1, 2 and 3)
Supply Voltage ...........................................................24V
Input Voltage ............................... V
S
+ 0.3V to GND – 5V
Input Current (V
IN
> V
S
) .......................................... 50mA
Storage Temperature............................. –65°C to +150°C
Lead Temperature (10 sec.) ................................... 300°C
ESD Rating,
Note 4
Operating Ratings
Supply Voltage .............................................. 4.5V to 20V
Junction Temperature ............................ –40°C to +125°C
Package Thermal Resistance
3x3 MLF™
(θ
JA
) ...............................................60°C/W
EPAD SOIC-8
(θ
JA
) ..........................................58°C/W
Electrical Characteristics:
>1V/µs
Symbol
INPUT
V
IH
V
IL
I
IN
V
IN
OUTPUT
V
OH
V
OL
R
O
R
O
I
PK
I
R
High Output Voltage
Low Output Voltage
Output Resistance,
Output Low
Output Resistance,
Output High
Peak Output Current
Logic 1 Input Voltage
Logic 0 Input Voltage
Input Voltage Range
Input Current
Parameter
(T
A
= 25°C with 4.5V ≤ V
S
≤ 20V unless otherwise specified. Note 3.) Input Voltage slew rate
Conditions
Min
2.4
–5
0 V ≤ V
IN
≤ V
S
See Figure 1
See Figure 1
I
OUT
= 10 mA, V
S
= 20 V
I
OUT
= 10 mA, V
S
= 20 V
V
S
= 20 V (See Figure 6)
–10
V
S
–0.025
1.4
1.5
6
200
Typ
1.9
1.5
0.8
V
S
+ 0.3
10
Max
Units
V
V
V
µA
V
0.025
5
5
V
Ω
Ω
A
mA
Latch-Up Protection
Withstand Reverse Current
Rise Time
Fall Time
Delay Time
Delay Time
SWITCHING TIME
t
R
t
F
t
D1
t
D2
Test Figure 1, C
L
= 2200 pF
Test Figure 1, C
L
= 2200 pF
Test Figure 1
Test Figure 1
12
13
45
50
30
35
30
35
75
100
75
100
3
400
20
ns
ns
ns
ns
ns
ns
ns
ns
mA
µA
V
POWER SUPPLY
I
S
V
S
Power Supply Current
Operating Input Voltage
V
IN
= 3 V
V
IN
= 0 V
0.45
60
4.5
Notes:
1. Functional operation above the absolute maximum stress ratings is not implied.
2. Static-sensitive device. Store only in conductive containers. Handling personnel and equipment should be grounded to prevent
damage from static discharge.
3. Specification for packaged product only.
4. Devices are ESD sensitive. Handling precautions recommended. Human body model: 1.5kΩ in series with 100pF.
August 2005
3
M9999-081105
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