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MIC4426/4427/4428
Micrel, Inc.
MIC4426/4427/4428
Dual 1.5A-Peak Low-Side MOSFET Driver
General Description
The MIC4426/4427/4428 family are highly-reliable dual lowside MOSFET drivers fabricated on a BiCMOS/DMOS process for low power consumption and high efficiency. These drivers translate 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 MIC4426/7/8 is available in three configurations: dual inverting, dual noninverting, and one inverting plus one noninverting output. The MIC4426/4427/4428 are pin-compatible replacements for the MIC426/427/428 and MIC1426/1427/1428 with improved electrical performance and rugged design (Refer to the Device Replacement lists on the following page). They can withstand up to 500mA of reverse current (either polarity) without latching and up to 5V noise spikes (either polarity) on ground pins. Primarily intended for driving power MOSFETs, MIC4426/7/8 drivers are suitable for driving other loads (capacitive, resistive, or inductive) which require low-impedance, high peak current, and fast switching time. Other applications include driving heavily loaded clock lines, coaxial cables, or piezoelectric transducers. The only load limitation is that total driver power dissipation must not exceed the limits of the package. Note See MIC4126/4127/4128 for high power and narrow pulse applications.
Features
* * * * * * * * * * * * * * * * * * * * Bipolar/CMOS/DMOS construction Latch-up protection to >500mA reverse current 1.5A-peak output current 4.5V to 18V operating range Low quiescent supply current 4mA at logic 1 input 400A at logic 0 input Switches 1000pF in 25ns Matched rise and rall times 7 output impedance <40ns typical delay Logic-input threshold independent of supply voltage Logic-input protection to -5V 6pF typical equivalent input capacitance 25mV max. output offset from supply or ground Replaces MIC426/427/428 and MIC1426/1427/1428 Dual inverting, dual noninverting, and inverting/ noninverting configurations ESD protection MOSFET driver Clock line driver Coax cable driver Piezoelectic transducer driver
Applications
Functional Diagram
INVERTING
VS
0.1mA
0.6mA
OUTA
INA
2k
NONINVERTING
0.1mA
0.6mA
INVERTING
OUTB
INB
2k
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
April 2008
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MIC4426/4427/4428
Micrel, Inc.
Ordering Information
Standard Part Number Pb-Free Temperature Range -40C to +85C -0C to +70C -40C to +85C -40C to +85C -0C to +70C -40C to +85C -0C to +70C -40C to +85C -40C to +85C -0C to +70C -40C TO +85C -0C to +70C -40C to +85C -40C to +85C -0C to +70C Package 8-Pin SOIC 8-Pin SOIC 8-Pin MSOP 8-Pin PDIP 8-Pin PDIP 8-Pin SOIC 8-Pin SOIC 8-Pin MSOP 8-Pin PDIP 8-Pin PDIP 8-Pin SOIC 8-Pin SOIC 8-Pin MSOP 8-Pin PDIP 8-Pin PDIP Configuration Dual Inverting Dual Inverting Dual Inverting Dual Inverting Dual Inverting Dual Non-Inverting Dual Non-Inverting Dual Non-Inverting Dual Non-Inverting Dual Non-Inverting Inverting + Non-Inverting Inverting + Non-Inverting Inverting + Non-Inverting Inverting + Non-Inverting Inverting + Non-Inverting
MIC4426BM MIC4426CM MIC4426BMM MIC4426BN MIC4426CN MIC4427BM MIC4427CM MIC4427BMM MIC4427BN MIC4427CN MIC4428BM MIC4428CM MIC4428BMM MIC4428BN MIC4428CN
MIC4426YM MIC4426ZM MIC4426YMM MIC4426YN MIC4426ZN MIC4427YM MIC4427ZM MIC4427YMM MIC4427YN MIC4427ZN MIC4428YM MIC4428ZM MIC4428YMM MIC4428YN MIC4428ZN
Note DESC standard military drawing 5962-88503 available; MIC4426, CERDIP 8-Pin SMD#: 5962-8850307PA MIC4427, CERDIP 8-Pin SMD#: 5962-8850308PA MIC4428, CERDIP 8-Pin SMD#: 5962-8850309PA
Micrel Part Number: 5952-8850307PA Micrel Part Number: 5952-8850308PA Micrel Part Number: 5952-8850309PA
MIC426/427/428 Device Replacement
Discontinued Number MIC426CM MIC426BM MIC426CN MIC426BN MIC427CM MIC427BM MIC427CN MIC427BN MIC428CM MIC428BM MIC428CN MIC428BN Replacement MIC4426BM MIC4426BM MIC4426BN MIC4426BN MIC4427BM MIC4427BM MIC4427BN MIC4427BN MIC4428BM MIC4428BM MIC4428BN MIC4428BN
MIC1426/1427/1428 Device Replacement
Discontinued Number MIC1426CM MIC1426BM MIC1426CN MIC1426BN MIC1427CM MIC1427BM MIC1427CN MIC1427BN MIC1428CM MIC1428BM MIC1428CN MIC1428BN Replacement MIC4426BM MIC4426BM MIC4426BN MIC4426BN MIC4427BM MIC4427BM MIC4427BN MIC4427BN MIC4428BM MIC4428BM MIC4428BN MIC4428BN
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MIC4426/4427/4428
Micrel, Inc.
MIC4426
2 A 7
Pin Configuration
MIC4426
NC 1 INA 2 GND 3 INB 4
8 NC 7 OUTA 6 VS 5 OUTB
MIC4427
NC 1 INA 2 GND 3 INB 4
8 NC 7 OUTA 6 VS 5 OUTB
2
MIC4427
A 7
MIC4428
NC 1 INA 2 GND 3 INB 4
8 NC 7 OUTA 6 VS 5 OUTB
2
MIC4428
A 7
4
B
5
4
B
5
4
B
5
Dual Inverting
Dual Noninverting
Inverting+ Noninverting
Pin Description
Pin Number 1, 8 2 3 4 5 6 7 Pin Name NC INA GND INB OUTB OUTA VS Pin Function not internally connected Control Input A: TTL/CMOS compatible logic input. Ground Control Input B: TTL/CMOS compatible logic input. Output B: CMOS totem-pole output. Supply Input: +4.5V to +18V Output A: CMOS totem-pole output.
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MIC4426/4427/4428
Micrel, Inc.
Absolute Maximum Ratings(1)
Supply Voltage (VS) ..................................................... +22V Input Voltage (VIN) .......................... VS + 0.3V to GND - 5V Junction Temperature (TJ) ......................................... 150C Storage Temperature ................................ -65C to +150C Lead Temperature (10 sec.) ...................................... 300C ESD Rating(3)
Operating Ratings(2)
Supply Voltage (VS) ...................................... +4.5V to +18V Temperature Range (TA) (A) ......................................................... -55C to +125C (B) ........................................................... -40C to +85C Package Thermal Resistance PDIP JA .......................................................................... 130C/W PDIP JC ............................................................................ 42C/W SOIC JA ........................................................... 120C/W SOIC JC ............................................................ 75C/W MSOP JA ......................................................... 250C/W
Electrical Characteristics(4)
Symbol Input VIH VIL IIN Logic 1 Input Voltage Logic 0 Input Voltage Input Current High Output Voltage Low Output Voltage Output Resistance Peak Output Current Latch-Up Protection Rise Time Fall Time Delay Tlme Delay Time Pulse Width Power Supply Current Power Supply Current withstand reverse current test Figure 1 test Figure 1 test Flgure 1 test Figure 1 test Figure 1 VINA = VINB = 3.0V VINA = VINB = 0.0V 400 0.6 1.4 1.5 0.18 0.19 4.5 8 0.4 0.6 >500 18 20 15 29 17 19 23 27 30 40 20 40 30 40 50 60 IOUT = 10mA, VS = 18V 0 VIN VS -1 VS-0.025 6 8 1.5 2.4 2.4 1.4 1.5 1.1 1.0 0.8 0.8 1 V V V V A V 0.025 10 12 V A mA ns ns ns ns ns ns ns ns ns mA mA mA mA 4.5V Vs 18V; TA = 25C, bold values indicate full specified temperature range; unless noted. Parameter Condition Min Typ Max Units
Output VOH VOL RO
IPK I
Switching Time tR tF tD1 tD2 tPW IS IS
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. 4. Specification for packaged product only.
Power Supply
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MIC4426/4427/4428
Micrel, Inc.
Test Circuits
VS = 18V 0.1F
7
VS = 18V 4.7F
INA
2
6
2
6
7
0.1F
OUTA 1000pF
4.7F
INA
A
MIC4426 INB
4
OUTA 1000pF
A
MIC4427 INB
4
B
5
OUTB 1000pF
B
5
OUTB 1000pF
Figure 1a. Inverting Configuration
5V 90% 10% 0V
VS 90%
O U TPU T
tP W
Figure 2a. Noninverting Configuration
5V 90% 10% 0V
VS 90%
O U TPU T
tD1
tP W 2.5V
2.5V
INPUT
INPUT
tD1
tF
tD2
tR
tR
tD2
tF
10% 0V
10% 0V
Figure 1b. Inverting Timing
Figure 2b. Noninverting Timing
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MIC4426/4427/4428
Micrel, Inc.
Electrical Characteristics
Rise and Fall Time vs. Supply Voltage
70 60 50
TIME (ns)
Delay Time vs. Supply Voltage
35 30 25
TIME (ns)
Rise and Fall Time vs. Temperature
40
CL = 1000pF TA = 25C
CL = 1000pF TA = 25C
t D2
TIME (ns)
CL = 1000pF VS = 18V
tF
tR
30
40 30 20 10 0 0 tF
20 15 10 5
tR
t D1
20
10
0 5 10 15 SUPPLY VOLTAGE (V) 20
5 10 15 SUPPLY VOLTAGE (V)
20
0
-75 -50 -25 0 25 50 75 100 125 150
TEMPERATURE (C)
Delay Time vs. Temperature
35 30 25
TIME (ns)
Supply Current vs. Capacitive Load
80 70 60 50 40 30 20 10 0
Rise and Fall Time vs. Capacitive Load
1k
t D2
SUPPLY CURRENT (mA)
CL = 1000pF VS = 18V
T A = 25C VS = 18V
400kHz
T A = 25C VS = 18V
tR
100
TIME (ns)
20 15 10 5 0 t D1
tF
10
200 kHz 20kHz
-75 -50 -25 0 25 50 75 100 125 150 TEMPERATURE (C)
10
100 1000 10000 CAPACITIVE LOAD (pF)
1
10
100 1000 10000 CAPACITIVE LOAD (pF)
Supply Current vs. Frequency
30
SUPPLY CURRENT (mA)
High Output vs. Current
1.20 0.96
| VS - V | (V) OUT
Low Output vs. Current
1.20
20
10 V
0.72 0.48 0.24 0
10 V
OUTPUT VOL AGE (V)
TA = 25C CL = 1000pF
VS = 18V
TA = 25C
VC = 5V
TA = 25C
VS = 5V
0.96 0.72 0.48 0.24 0
10 V
10
5V
15 V
15 V
0
1
10 100 FREQUENCY (kHz)
1000
0 10 20 30 40 50 60 70 80 90 100
CURRENT SOURCED (mA)
0 10 20 30 40 50 60 70 80 90 100 CURRENT SUNK (mA)
2.5
SUPPLY CURRENT (mA)
Quiescent Power Supply Current vs. Supply Voltage
400
SUPPLY CURRENT (A)
Quiescent Power Supply Current vs. Supply Voltage
Package Power Dissipation
1250
MAXIMUM PACKAGE POWER DISSIP TION (mW)
1000 750 500 250 0
2.0 1.5 1.0 0.5 0
300 200 150 100 50 0 0 5 10 15 SUPPLY VOLTAGE (V)
SOIC
NO LOAD BOTH INPUTS LOGIC "1" TA = 25C
NO LOAD BOTH INPUTS LOGIC "0" TA = 25C
PDIP
0
5
10
15
20
20
25
50
75
100
125
150
SUPPLY VOLTAGE (V)
AMBIENT TEMPERATURE (C)
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MIC4426/4427/4428
Micrel, Inc. Power Dissipation Power dissipation should be calculated to make sure that the driver is not operated beyond its thermal ratings. Quiescent power dissipation is negligible. A practical value for total power dissipation is the sum of the dissipation caused by the load and the transition power dissipation (PL + PT). Load Dissipation Power dissipation caused by continuous load current (when driving a resistive load) through the driver's output resistance is: For capacitive loads, the dissipation in the driver is: Transition Dissipation In applications switching at a high frequency, transition power dissipation can be significant. This occurs during switching transitions when the P-channel and N-channel output FETs are both conducting for the brief moment when one is turning on and the other is turning off. Charge (Q) is read from the following graph:
1x10-8 8x10-9 6x10-9 4x10-9 3x10-9 2x10-9
Applications Information
Supply Bypassing Large currents are required to charge and discharge large capacitive loads quickly. For example, changing a 1000pF load by 16V in 25ns requires 0.8A from the supply input. To guarantee low supply impedance over a wide frequency range, parallel capacitors are recommended for power supply bypassing. Low-inductance ceramic MLC capacitors with short lead lengths (< 0.5") should be used. A 1.0F film capacitor in parallel with one or two 0.1F ceramic MLC capacitors normally provides adequate bypassing. Grounding When using the inverting drivers in the MIC4426 or MIC4428, individual ground returns for the input and output circuits or a ground plane are recommended for optimum switching speed. The voltage drop that occurs between the driver's ground and the input signal ground, during normal high-current switching, will behave as negative feedback and degrade switching speed. Control Input Unused driver inputs must be connected to logic high (which can be VS) or ground. For the lowest quiescent current (< 500A) , connect unused inputs to ground. A logic-high signal will cause the driver to draw up to 9mA. The drivers are designed with 100mV of control input hysteresis. This provides clean transitions and minimizes output stage current spikes when changing states. The control input voltage threshold is approximately 1.5V. The control input recognizes 1.5V up to VS as a logic high and draws less than 1A within this range. The MIC4426/7/8 drives the TL494, SG1526/7, MIC38C42, TSC170 and similar switch-mode power supply integrated circuits.
PL = IL2 RO
PL = f CL VS2
PT = 2 f VS Q
CHARGE (Q)
1x10-9
4
6
8 10 12 14 16 SUPPLY VOLTAGE (V)
18
Crossover Energy Loss per Transition
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MIC4426/4427/4428
Micrel, Inc.
Package Information
MAX )
PIN 1
0.150 (3.81)
INCHES (MM)
0.013 (0.33) TYP 0.0040 (0.102) 0-8 0.189 (4.8) 0.045 (1.14) PLANE 0.228 (5.79) 0.016 (0.40) 45 0.010 (0.25) 0.007 (0.18)
8-Pin SOIC (M)
0.112 (2.84)
0.187 (4.74)
INCH (MM)
0.116 (2.95) 0.032 (0.81) 0.038 (0.97) 0.012 (0.30) R 0.007 (0.18) 0.005 (0.13)
0.012 (0.03) 0.0256 (0.65) TYP
0.004 (0.10)
5 0 MIN
0.012 (0.03) R 0.035 (0.89) 0.021 (0.53)
8-Pin MM8TM MSOP (MM)
8-Pin Plastic DIP (N)
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April 2008
MIC4426/4427/4428
Micrel, Inc.
MICREL INC.
TEL + 1 (408) 944-0800 FAX + 1 (408) 474-1000 WEB http://www.micrel.com
2180 FORTUNE DRIVE
SAN JOSE, CA 95131
USA
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 use. Micrel reserves the right to change circuitry and specifications at any time without notification to the customer. Micrel Products are not designed or authorized for use as components in life support appliances, devices or systems where malfunction of a product 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 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. (c) 2003 Micrel, Incorporated.
April 2008
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M9999-042108

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