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MIC4429CM
Datasheet (MICREL)
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Specification
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Datasheet MIC4420CN, MIC4420BN, MIC4420CM, MIC4420BM, MIC4420BMM Specification

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Page 1
MIC4420/4429 Micrel, Inc.
IN
OUT
MIC4429
IN V E R T I N G
MIC4420
NONIN V E RTING
0.1mA
0.4m
A
2k
Ω
V
S
GND
MIC4420/4429
6A-Peak Low-Side MOSFET Driver
Bipolar/CMOS/DMOS Process
General Description
MIC4420, MIC4429 and MIC429 MOSFET drivers are tough, efficient, and easy to use. The MIC4429 and MIC429 are inverting drivers, while the MIC4420 is a non-inverting driver.
They are capable of 6A (peak) output and can drive the larg­est MOSFETs with an improved safe operating margin. The MIC4420/4429/429 accepts any logic input from 2.4V to VS without external speed-up capacitors or resistor networks. Proprietary circuits allow the input to swing negative by as much as 5V without damaging the part. Additional circuits protect against damage from electrostatic discharge.
MIC4420/4429/429 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 ad­equate gate voltage to the MOSFET during power up/down sequencing.
Note: See MIC4120/4129 for high power and narrow pulse applications.
Features
• CMOS Construction
• Latch-Up Protected: Will Withstand >500mA 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 18V
• High Capacitive Load Drive ............................10,000pF
• Low Delay Time .............................................. 55ns Typ
• Logic High Input for Any Voltage From 2.4V to V
• 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
S
Applications
• Switch Mode Power Supplies
• Motor Controls
• Pulse Transformer Driver
• Class-D Switching Amplifiers
Functional Diagram
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 M9999-072205
Page 2
MIC4420/4429 Micrel, Inc.
1
2
3
4
8
7
6
5
V S
OUT
OUT
GND
V S
IN
NC
GND
5 OUT 4 GND 3 VS 2 GND 1 IN
Ordering Information
Part No. Temperature Standard Pb-Free Range Package Configuration
MIC4420CN MIC4420ZN 0°C to +70°C 8-Pin PDIP Non-Inverting
MIC4420BN MIC4420YN –40°C to +85°C 8-Pin PDIP Non-Inverting
MIC4420CM MIC4420ZM 0°C to +70°C 8-Pin SOIC Non-Inverting
MIC4420BM MIC4420YM –40°C to +85°C 8-Pin SOIC Non-Inverting
MIC4420BMM MIC4420YMM –40°C to +85°C 8-Pin MSOP Non-Inverting
MIC4420CT MIC4420ZT 0°C to +70°C 5-Pin TO-220 Non-Inverting
MIC4429CN MIC4429ZN 0°C to +70°C 8-Pin PDIP Inverting
MIC4429BN MIC4429YN –40°C to +85°C 8-Pin PDIP Inverting
MIC4429CM MIC4429ZM 0°C to +70°C 8-Pin SOIC Inverting
MIC4429BM MIC4429YM –40°C to +85°C 8-Pin SOIC Inverting
MIC4429BMM MIC4429YMM –40°C to +85°C 8-Pin MSOP Inverting
MIC4429CT MIC4429ZT 0°C to +70°C 5-Pin TO-220 Inverting
Pin Configurations
Plastic DIP (N)
SOIC (M)
MSOP (MM)
TO-220-5 (T)
Pin Description
Pin Number Pin Number Pin Name Pin Function TO-220-5
1 2 IN Control Input
2, 4 4, 5 GND Ground: Duplicate pins must be externally connected together.
3,
TAB 1, 8 V
5 6, 7 OUT Output: Duplicate pins must be externally connected together.
3 NC Not connected.
M9999-072205 2 July 2005
DIP, SOIC, MSOP
Supply Input: Duplicate pins must be externally connected together.
S
Page 3
MIC4420/4429 Micrel, Inc.
Absolute Maximum Ratings
Supply Voltage ...........................................................20V
Input Voltage ...............................
Input Current (VIN > VS) .......................................... 50mA
Power Dissipation, T
PDIP ....................................................................
SOIC ...............................................................
5-Pin TO-220 ...........................................................
Power Dissipation, T
5-Pin TO-220 ......................................................
≤ 25°C
A
≤ 25°C
C
(Notes 1, 2 and 3)
VS + 0.3V to GND – 5V
960W
1040mW
2W
12.5W
Operating Ratings
Supply Voltage .............................................. 4.5V to 18V
Junction Temperature .............................................
Ambient Temperature
C Version .................................................
B Version .............................................
0°C to +70°C
–40°C to +85°C Package Thermal Resistance 5-pin TO-220 8-pin MSOP
(θJC) ............................................10°C/W
(θJA) ...........................................250°C/W
150°C
Derating Factors (to Ambient)
PDIP .............................................................
SOIC .............................................................
5-Pin TO-220 .................................................
Storage Temperature .............................
–65°C to +150°C
Lead Temperature (10 sec.) ...................................
Electrical Characteristics: (T
Symbol Parameter Conditions Min Typ Max Units
INPUT
VIH Logic 1 Input Voltage 2.4 1.4 V
V
IL
VIN Input Voltage Range –5 VS + 0.3 V
IIN Input Current 0 V ≤ VIN ≤ VS –10 10 µA
OUTPUT
VOH High Output Voltage See Figure 1 VS–0.025 V
VOL Low Output Voltage See Figure 1 0.025 V
RO Output Resistance, I Output Low
RO Output Resistance, I Output High
IPK Peak Output Current VS = 18 V (See Figure 6) 6 A
IR Latch-Up Protection >500 mA Withstand Reverse Current
SWITCHING TIME (Note 3)
tR Rise Time Test Figure 1, CL = 2500 pF 12 35 ns
tF Fall Time Test Figure 1, CL = 2500 pF 13 35 ns
tD1 Delay Time Test Figure 1 18 75 ns
tD2 Delay Time Test Figure 1 48 75 ns
POWER SUPPLY
IS Power Supply Current VIN = 3 V 0.45 1.5 mA V
V
S
Logic 0 Input Voltage 1.1 0.8 V
Operating Input Voltage 4.5 18 V
A
7.7mW/°C
8.3mW/°C 17mW/°C
300°C
= 25°C with 4.5V ≤ V
= 10 mA, VS = 18 V 1.7 2.8 Ω
OUT
= 10 mA, VS = 18 V 1.5 2.5 Ω
OUT
= 0 V 90 150 µA
IN
≤ 18V unless otherwise specified. Note 4.)
S
July 2005 3 M9999-072205
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MIC4420/4429 Micrel, Inc.
t
D1
90%
10%
t
F
10%
0V
5V
t
D2
t
R
V
S
OU T P U T
INP U T
90%
0V
tPW≥ 0 .5µs
2. 5V
t
PW
IN
MIC442 9
OUT
2500pF
VS = 18V
0.1µF 1.0µF
0.1µF
IN
MIC442 0
OUT
2500pF
VS = 18V
0.1µF 1.0µF
0.1µF
90%
10%
t
R
10%
0V
5V
t
F
V
S
OU T P U T
INP U T
90%
0V
tPW≥ 0 .5µs
t
D1
t
D2
t
PW
2. 5V
Electrical Characteristics: (T
= –55°C to +125°C with 4.5V ≤ V
A
≤ 18V unless otherwise specified.)
S
Symbol Parameter Conditions Min Typ Max Units
INPUT
VIH Logic 1 Input Voltage 2.4 V
V
IL
Logic 0 Input Voltage 0.8 V
VIN Input Voltage Range –5 VS + 0.3 V
IIN Input Current 0V ≤ VIN ≤ VS –10 10 µA
OUTPUT
VOH High Output Voltage Figure 1 VS–0.025 V
VOL Low Output Voltage Figure 1 0.025 V
RO Output Resistance, I
= 10mA, VS = 18V 3 5 Ω
OUT
Output Low
RO Output Resistance, I
= 10mA, VS = 18V 2.3 5 Ω
OUT
Output High
SWITCHING TIME (Note 3)
tR Rise Time Figure 1, CL = 2500pF 32 60 ns
tF Fall Time Figure 1, CL = 2500pF 34 60 ns
tD1 Delay Time Figure 1 50 100 ns
tD2 Delay Time Figure 1 65 100 ns
POWER SUPPLY
IS Power Supply Current VIN = 3V 0.45 3.0 mA V
V
S
Operating Input Voltage 4.5 18 V
= 0V 0.06 0.4 mA
IN
Note 1: Functional operation above the absolute maximum stress ratings is not implied. Note 2: Static-sensitive device. Store only in conductive containers. Handling personnel and equipment should be grounded to
prevent damage from static discharge.
Note 3: Switching times guaranteed by design. Note 4: Specification for packaged product only.
Test Circuits
M9999-072205 4 July 2005
Figure 1. Inverting Driver Switching Time
Figure 2. Noninverting Driver Switching Time
Page 5
MIC4420/4429 Micrel, Inc.
30
20
10
5
1000
10,000
CAPACITIVE LOAD (pF)
TIME (ns)
V = 18V
S
Fall Time vs. Capacitive Load
40
50
V = 12V
S
V = 5V
S
60
50
40
30
20
10
–60 –20 20 60 100
140
TEMPERATURE (°C)
TIME (ns)
D1
t
D2
t
Propagation Delay Time
vs.
Temperature
0 100 1000
10,000
CAPACITIVE LOAD (pF)
I – SUPPLY CURRENT (mA)
S
Supply Current vs. Capacitive Load
C = 2200 pF
L
V = 18V
S
84
70
56
42
28
14
0
500 kHz
200 kHz
20 kHz
V = 15V
S
60
50
40
30
20
10
0
DELAY TIME (ns)
4 6 8 10 12 14 16 18
SUPPLY VOLTAGE (V)
Delay Time vs. Supply Voltage
t
D2
t
D1
V = 12V
S
V = 5V
S
30
20
10
5 1000
10,000
CAPACITIVE LOAD (pF)
V = 18V
S
Rise Time vs. Capacitive Load
40
50
TIME (ns)
100
0
0 100 1000
10,000
FREQUENCY (kHz)
SUPPLY CURRENT (mA)
Supply Current vs. Frequency
10
1000
18V
10V
5V
C = 2200 pF
L
–60 –20 20 60 100
140
TEMPERATURE (°C)
5 7 9 11 13 15
V (V)
S
5 7 9 11 13 15
t
RISE
t
25
20
15
10
5
0
TIME (ns)
Rise and Fall Times vs. Temperature
C = 2200 pF V = 18V
S
FALL
C = 2200 pF
L
60
50
40
30
20
10
0
TIME (ns)
Rise Time vs. Supply Voltage
C = 4700 pF
L
C = 10,000 pF
L
C = 2200 pF
L
TIME (ns)
Fall Time vs. Supply Voltage
C = 4700 pF
L
C = 10,000 pF
L
50
40
30
20
10
0
L
V (V)
S
3000
3000
Typical Characteristic Curves
July 2005 5 M9999-072205
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MIC4420/4429 Micrel, Inc.
2.5
2
1.5
1
5 9 13
V (V)
S
Low-State Output Resistance
R ( )W
OUT
100 mA
50 mA
10 mA
7 11 15
1000
800
600
400
200
0
SUPPLY VOLTAGE (V)
900
800
700
600
500
400
–60 –20 20 60 100
140
TEMPERATURE (°C)
Quiescent Power Supply Current vs. Temperature
LOGIC “1” INPUT V = 18V
S
SUPPLY CURRENT (A)
0 4 8 12 16
20
SUPPLY CURRENT (A)
Quiescent Power Supply
Voltage vs. Supply Current
LOGIC “1” INPUT
5
4
3
2
5 9 13
V (V)
S
High-State Output Resistance
R ( )W
OUT
100 mA
50 mA
10 mA
7 11 15
200
160
120
80
40
0
DELAY (ns)
5 6 7 11 13
15
Effect of Input Amplitude
on Propagation Delay
LOAD = 2200 pF
INPUT 2.4V
INPUT 3.0V
INPUT 5.0V
INPUT 8V AND 10V
8 9 10 12 14
V (V)
S
2.0
1.5
1.0
0.5
0
CROSSOVER AREA (A•s) x 10
-8
5 6 7 11 13
15
Crossover Area vs. Supply Voltage
8 9 10 12 14
SUPPLY VOLTAGE V (V)
LOGIC “0” INPUT
PER TRANSITION
S
Typical Characteristic Curves (Cont.)
M9999-072205 6 July 2005
Page 7
MIC4420/4429 Micrel, Inc.
MI C4 429
1µF 50 V MKS
2
UNITE D C H E M C O N S X E
0.1µ F WIMA MKS
2
1
8
6,
7
5
4
0.1µ F 50 V
5.6 kΩ
560
Ω
+15
22 0 µ F 5 0V
BY V 1 0 ( x 2)
35 µF 5 0 V
(x2) 1N4448
2
+
+
+
Applications Information
Supply Bypassing
Charging and discharging large capacitive loads quickly requires large currents. For example, charging a 2500pF load to 18V in 25ns requires a 1.8 A current from the device power supply.
Internal ringing can also cause output oscillation due to feedback. This feedback is added to the input signal since it is referenced to the same ground.
®
), provides
Grounding
The high current capability of the MIC4420/4429 demands careful PC board layout for best performance Since the MIC4429 is an inverting driver, any ground lead impedance will appear as negative feedback which can degrade switch ing speed. Feedback is especially noticeable with slow-rise time inputs. The MIC4429 input structure includes 300mV of hysteresis to ensure clean transitions and freedom from oscillation, but attention to layout is still recommended.
Figure 3 shows the feedback effect in detail. As the MIC4429 input begins to go positive, the output goes negative and several amperes of current flow in the ground lead. As little as 0.05Ω of PC trace resistance can produce hundreds of millivolts at the MIC4429 ground pins. If the driving logic is referenced to power ground, the effective logic input level is reduced and oscillation may result.
To insure optimum performance, separate ground traces should be provided for the logic and power connections. Connecting the logic ground directly to the MIC4429 GND pins will ensure full logic drive to the input and ensure fast output switching. Both of the MIC4429 GND pins should, however, still be connected to power ground.
-
-
July 2005 7 M9999-072205
Figure 3. Self-Contained Voltage Doubler
Page 8
MIC4420/4429 Micrel, Inc.
MIC 44 29
1
8
6,
7
5
4
+18 V
0.1 µF
0.1 µF
TE K C U R RE NT
PR OBE 63 02
2,5 00 pF PO LY C AR BO NA TE
5. 0V
0 V
18 V
0 V
WIM A MKS -2 1 µF
LOGIC
GROUND
POWER
GROUND
6 AMPS
300 mV
PC TRACE RESISTANCE = 0.05Ω
Input Stage
The MIC4420/4429 input is designed to provide 300mV of hysteresis. This provides clean transitions, reduces noise sensitivity, and minimizes output stage current spiking when changing states. Input voltage threshold level is approxi mately 1.5V, making the device TTL compatible over the 4 .5V to 18V operating supply voltage range. Input current is less than 10µA over this range.
The MIC4429 can be directly driven by the TL494, SG1526/1527, SG1524, TSC170, MIC38HC42 and similar switch mode power supply integrated circuits. By offloading the power-driving duties to the MIC4420/4429, the power supply controller can operate at lower dissipation. This can improve performance and reliability.
+
The input can be greater than the
VS supply, however, current will flow into the input lead. The propagation delay for T perature. The input currents can be as high as 30mA p-p (6.4mA voltage. No damage will occur to MIC4420/4429 however,
will increase to as much as 400ns at room tem-
D2
) with the input, 6 V greater than the supply
RMS
and it will not latch.
The input appears as a 7pF capacitance, and does not change even if the input is driven from an AC source. Care should be taken so that the input does not go more than 5 volts below the negative rail.
Power Dissipation
CMOS circuits usually permit the user to ignore power dis­sipation. Logic families such as 4000 and 74C have outputs which can only supply a few milliamperes of current, and even shorting outputs to ground will not force enough cur rent to destroy the device. The MIC4420/4429 on the other hand, can source or sink several amperes and drive large capacitive loads at high frequency. The package power dissipation limit can easily be exceeded. Therefore, some
attention should be given to power dissipation when driving low impedance loads and/or operating at high frequency.
-
Given the power dissipation in the device, and the thermal
-
resistance of the package, junction operating temperature for any ambient is easy to calculate. For example, the thermal resistance of the 8-pin MSOP package, from the data sheet, is 250°C/W. In a 25°C ambient, then, using a maximum junction temperature of 150°C, this package will dissipate 500mW.
Accurate power dissipation numbers can be obtained by summing the three sources of power dissipation in the device:
• Load Power Dissipation (PL)
• Quiescent power dissipation (PQ)
• Transition power dissipation (P
)
T
Calculation of load power dissipation differs depending on whether the load is capacitive, resistive or inductive.
Resistive Load Power Dissipation
Dissipation caused by a resistive load can be calculated as:
PL = I2 RO D
where:
I = the current drawn by the load
= the output resistance of the driver when the output
R
O
is high, at the power supply voltage used. (See data
­ D = fraction of time the load is conducting (duty cycle)
sheet)
-
Table 1: MIC4429 Maximum
Operating Frequency
V
Max Frequency
S
18V 500kHz
15V 700kHz
10V 1.6MHz
Figure 4. Switching Time Degradation Due to
M9999-072205 8 July 2005
Negative Feedback
Conditions: 1. DIP Package (θJA = 130°C/W)
2. TA = 25°C
3. C
= 2500pF
L
Page 9
MIC4420/4429 Micrel, Inc.
Capacitive Load Power Dissipation
Dissipation caused by a capacitive load is simply the en ergy placed in, or removed from, the load capacitance by the driver. The energy stored in a capacitor is described by the equation:
E = 1/2 C V
2
As this energy is lost in the driver each time the load is charged or discharged, for power dissipation calculations the 1/2 is removed. This equation also shows that it is good practice not to place more voltage on the capacitor than is necessary, as dissipation increases as the square of the voltage applied to the capacitor. For a driver with a capacitive load:
P
= f C (VS)
L
2
where:
f = Operating Frequency C = Load Capacitance
= Driver Supply Voltage
V
S
Inductive Load Power Dissipation
For inductive loads the situation is more complicated. For the part of the cycle in which the driver is actively forcing current into the inductor, the situation is the same as it is in the resistive case:
P
However, in this instance the R the on resistance of the driver when its output is in the high
= I2 RO D
L1
required may be either
O
state, or its on resistance when the driver is in the low state, depending on how the inductor is connected, and this is still only half the story. For the part of the cycle when the inductor is forcing current through the driver, dissipation is best described as
P
where V driver (generally around 0.7V). The two parts of the load dissipation must be summed in to produce P
PL = PL1 + P
= I VD (1-D)
L2
is the forward drop of the clamp diode in the
D
L
L2
Quiescent Power Dissipation
Quiescent power dissipation (P section) depends on whether the input is high or low. A low
, as described in the input
Q
P
= VS [D IH + (1-D) IL]
Q
where:
-
= quiescent current with input high
I
H
= quiescent current with input low
I
L
D = fraction of time input is high (duty cycle)
= power supply voltage
V
S
Transition Power Dissipation
Transition power is dissipated in the driver each time its output changes state, because during the transition, for a very brief interval, both the N- and P-channel MOSFETs in the output totem-pole are ON simultaneously, and a cur rent is conducted through them from V transition power dissipation is approximately:
P
= 2 f VS (A•s)
T
+
to ground. The
S
where (A•s) is a time-current factor derived from the typical characteristic curves.
Total power (P
P
) then, as previously described is:
D
= PL + PQ +P
D
T
Definitions
CL = Load Capacitance in Farads.
D = Duty Cycle expressed as the fraction of time the
input to the driver is high.
f = Operating Frequency of the driver in Hertz
= Power supply current drawn by a driver when both
I
H
inputs are high and neither output is loaded.
= Power supply current drawn by a driver when both
I
L
inputs are low and neither output is loaded.
= Output current from a driver in Amps.
I
D
= Total power dissipated in a driver in Watts.
P
D
= Power dissipated in the driver due to the driver’s
P
L
load in Watts.
= Power dissipated in a quiescent driver in
P
Q
Watts.
= Power dissipated in a driver when the output
P
T
changes states (“shoot-through current”) in Watts. NOTE: The “shoot-through” current from a dual transition (once up, once down) for both drivers is shown by the "Typical Characteristic Curve : Crossover Area vs. Supply Voltage and is in am pere-seconds. This figure must be multiplied by the number of repetitions per second (frequency) to find Watts.
= Output resistance of a driver in Ohms.
R
O
= Power supply voltage to the IC in Volts.
V
S
-
-
July 2005 9 M9999-072205
Page 10
MIC4420/4429 Micrel, Inc.
MIC4429
1
8
6,
7
5
4
+18 V
0.1µF
0.1µF
TE K C U R R E N T
PR O B E 6 3 0 2
10,000 pF PO L YC A R B ON A T E
5. 0V
0 V
18 V
0 V
WIMA MK22 1 µF
2
Figure 5. Peak Output Current Test Circuit
M9999-072205 10 July 2005
Page 11
MIC4420/4429 Micrel, Inc.
0.380 (9.65)
0.370 (9.40)
0.135 (3.43)
0.125 (3.18)
PIN 1
DIMENSIONS:
INCH (MM)
0.018 (0.57)
0.100 (2.54)
0.013 (0.330)
0.010 (0.254)
0.300 (7.62)
0.255 (6.48)
0.245 (6.22)
0.380 (9.65)
0.320 (8.13)
0.0375 (0.952)
0.130 (3.30)
Package Information
8-Pin Plastic DIP (N)
8-Pin SOIC (M)
July 2005 11 M9999-072205
Page 12
MIC4420/4429 Micrel, Inc.
0.004 (0.10)
0.035 (0.89)
0.021 (0.53)
0.012 (0.03) R
0.0256 (0.65) TYP
0.012 (0.30) R
5°
0° MIN
0.112 (2.84)
0.116 (2.95)
0.012 (0.03)
0.007 (0.18)
0.005 (0.13)
0.038 (0.97)
0.032 (0.81)
INCH (MM)
0.187 (4.74)
0.018 ±0.008 (0.46 ±0.20)
0.268 REF (6.81 REF)
0.032 ±0.005 (0.81 ±0.13)
0.550 ±0.010 (13.97 ±0.25)
7°
Typ.
SEATING PLANE
0.578 ±0.018
(14.68 ±0.46)
0.108 ±0.005 (2.74 ±0.13)
0.050 ±0.005 (1.27 ±0.13)
0.150 D ±0.005 (3.81 D ± 0.13)
0.400 ±0.015
(10.16 ±0.38)
0.177 ±0.008 (4.50 ±0.20)
0.103 ±0.013 (2.62 ± 0.33)
0.241 ±0.017 (6.12 ±0.43)
0.067 ±0.005 (1.70 ±0.127)
inch
(mm)
Dimensions:
8-Pin MSOP (MM)
This information furnished by Micrel in this data sheet is believed to be accurate and reliable. However no responsibility is assumed by Micrel for its
Micrel Products are not designed or authorized for use as components in life support appliances, devices or systems where malfunction of a product
M9999-072205 12 July 2005
use. Micrel reserves the right to change circuitry and specifications at any time without notification to the customer.
can reasonably be expected to result in personal injury. Life support devices or systems are devices or systems that (a) are intended for surgical implant into the body or (b) support or sustain life, and whose failure to perform can be reasonably expected to result in a significant injury to the
MICREL INC. 2180 FORTUNE DRIVE SAN JOSE, CA 95131 USA
TEL + 1 (408) 944-0800 FAX + 1 (408) 474-1000 WEB http://www.micrel.com
5-Lead TO-220 (T)
user. A Purchaser’s use or sale of Micrel Products for use in life support appliances, devices or systems is a Purchaser’s own risk and Purchaser
agrees to fully indemnify Micrel for any damages resulting from such use or sale.
© 2001 Micrel, Inc.
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