Micrel MIC4426BN Dual 1.5a-peak low-side mosfet driver Datasheet

MIC4426/4427/4428
Micrel
MIC4426/4427/4428
Dual 1.5A-Peak Low-Side MOSFET Driver
General Description
Features
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.
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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.
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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
400µA at logic 0 input
Switches 1000pF in 25ns
Matched rise and rall times
7Ω 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
Applications
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MOSFET driver
Clock line driver
Coax cable driver
Piezoelectic transducer driver
Functional Diagram
VS
0.6mA
INVERTING
0.1mA
OUTA
INA
2kΩ
NONINVERTING
0.6mA
INVERTING
0.1mA
OUTB
INB
2kΩ
NONINVERTING
GND
September 1999
1
MIC4426/4427/4428
MIC4426/4427/4428
Micrel
Ordering Information
Part Number
Temperature Range
Package
Configuration
MIC4426AM
–55°C to +125°C
8-lead SOIC
Dual Inverting
MIC4426BM
–40°C to +85°C
8-lead SOIC
Dual Inverting
MIC4426BMM
–40°C to +85°C
8-lead MSOP
Dual Inverting
MIC4426BN
–40°C to +85°C
8-lead Plastic DIP
Dual Inverting
MIC4427AM
–55°C to +125°C
8-lead SOIC
Dual Noninverting
MIC4427BM
–40°C to +85°C
8-lead SOIC
Dual Noninverting
MIC4427BMM
–40°C to +85°C
8-lead MSOP
Dual Noninverting
MIC4427BN
–40°C to +85°C
8-pin Plastic DIP
Dual Noninverting
MIC4428AM
–55°C to +125°C
8-lead SOIC
Inverting + Noninverting
MIC4428BM
–40°C to +85°C
8-lead SOIC
Inverting + Noninverting
MIC4428BMM
–40°C to +85°C
8-lead MSOP
Inverting + Noninverting
MIC4428BN
–40°C to +85°C
8-lead Plastic DIP
Inverting + Noninverting
MIC426/427/428 Device Replacement
Discontinued Number
MIC426CM
MIC426BM
MIC426CN
MIC426BN
MIC427CM
MIC427BM
MIC427CN
MIC427BN
MIC428CM
MIC428BM
MIC428CN
MIC428BN
MIC1426/1427/1428 Device Replacement
Replacement
MIC4426BM
MIC4426BM
MIC4426BN
MIC4426BN
MIC4427BM
MIC4427BM
MIC4427BN
MIC4427BN
MIC4428BM
MIC4428BM
MIC4428BN
MIC4428BN
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
Pin Configuration
MIC4426
MIC4426
NC 1
8 NC
INA 2
7 OUTA
MIC4427
2
A
7
4
B
5
6 VS
GND 3
5 OUTB
INB 4
8 NC
INA 2
7 OUTA
MIC4428
2
A
7
4
B
5
6 VS
GND 3
Dual
Inverting
MIC4427
NC 1
5 OUTB
INB 4
8 NC
INA 2
7 OUTA
2
A
7
4
B
5
6 VS
GND 3
Dual
Noninverting
MIC4428
NC 1
5 OUTB
INB 4
Inverting +
Noninverting
Pin Description
Pin Number
Pin Name
1, 8
NC
not internally connected
2
INA
Control Input A: TTL/CMOS compatible logic input.
3
GND
Ground
4
INB
Control Input B: TTL/CMOS compatible logic input.
5
OUTB
6
VS
7
OUTA
MIC4426/4427/4428
Pin Function
Output B: CMOS totem-pole output.
Supply Input: +4.5V to +18V
Output A: CMOS totem-pole output.
2
September 1999
MIC4426/4427/4428
Micrel
Absolute Maximum Ratings (Note 1)
Operating Ratings (Note 2)
Supply Voltage (VS) .................................................... +22V
Input Voltage (VIN) ......................... VS + 0.3V to GND – 5V
Junction Temperature (TJ) ........................................ 150°C
Storage Temperature ............................... –65°C to +150°C
Lead Temperature (10 sec.) ...................................... 300°C
ESD Rating, Note 3
Supply Voltage (VS) ..................................... +4.5V to +18V
Temperature Range (TA)
(A) ........................................................ –55°C to +125°C
(B) .......................................................... –40°C to +85°C
Package Thermal Resistance
PDIP θJA ............................................................ 130°C/W
PDIP θJC ............................................................. 42°C/W
SOIC θJA ........................................................... 120°C/W
SOIC θJC ............................................................. 75°C/W
MSOP θJC ......................................................... 250°C/W
Electrical Characteristics
4.5V ≤ Vs ≤ 18V; TA = 25°C, bold values indicate full specified temperature range; unless noted.
Symbol
Parameter
Condition
Min
Typ
2.4
2.4
1.4
1.5
Max
Units
Input
VIH
Logic 1 Input Voltage
VIL
Logic 0 Input Voltage
IIN
Input Current
1.1
1.0
0 ≤ VIN ≤ VS
–1
V
V
0.8
0.8
V
V
1
µA
Output
VOH
High Output Voltage
VOL
Low Output Voltage
RO
Output Resistance
IPK
Peak Output Current
I
Latch-Up Protection
VS–0.025
IOUT = 10mA, VS = 18V
V
6
8
0.025
V
10
12
Ω
Ω
1.5
withstand reverse current
A
>500
mA
Switching Time
tR
Rise Time
test Figure 1
18
20
30
40
ns
ns
tF
Fall Time
test Figure 1
15
29
20
40
ns
ns
tD1
Delay Tlme
test Flgure 1
17
19
30
40
ns
ns
tD2
Delay Time
test Figure 1
23
27
50
60
ns
ns
tPW
Pulse Width
test Figure 1
IS
Power Supply Current
VINA = VINB = 3.0V
1.4
1.5
4.5
8
mA
mA
IS
Power Supply Current
VINA = VINB = 0.0V
0.18
0.19
0.4
0.6
mA
mA
400
ns
Power Supply
Note 1.
Exceeding the absolute maximum rating may damage the device.
Note 2.
The device is not guaranteed to function outside its operating rating.
Note 3.
Devices are ESD sensitive. Handling precautions recommended.
September 1999
3
MIC4426/4427/4428
MIC4426/4427/4428
Micrel
Test Circuits
VS = 18V
VS = 18V
0.1µF
6
INA
2
7
A
4.7µF
0.1µF
6
OUTA
INA
2
7
A
1000pF
INB
MIC4427
5
B
OUTB
INB
4
5
B
1000pF
5V
90%
VS
90%
Figure 2a. Noninverting Configuration
2.5V
INPUT
10%
0V
tD1
tPW
5V
90%
2.5V
10%
0V
tF
OUTB
1000pF
Figure 1a. Inverting Configuration
INPUT
OUTA
1000pF
MIC4426
4
4.7µF
tD2
tR
VS
90%
tD1
tPW
tR
tD2
tF
OUTPUT
OUTPUT
10%
0V
10%
0V
Figure 1b. Inverting Timing
MIC4426/4427/4428
Figure 2b. Noninverting Timing
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September 1999
MIC4426/4427/4428
Micrel
Electrical Characteristics
Rise and Fall Time vs.
Supply Voltage
70
35
CL = 1000pF
TA = 25°C
60
30
tR
tF
10
0
20
15
10
5
10
15
SUPPLY VOLTAGE (V)
0
20
5
10
15
SUPPLY VOLTAGE (V)
20
t D1
15
-75 -50 -25 0 25 50 75 100 125 150
TEMPERATURE (°C)
20
10
5
0
1k
400kHz
T A = 25°C
VS = 18V
70
Rise and Fall Time vs.
Capacitive Load
T A = 25°C
VS = 18V
60
40
30
10
10
10
High Output vs. Current
Low Output vs. Current
VC = 5V
TA = 25°C
OUTPUT VOLTAGE (V)
TA = 25°C
| VS – VOUT | (V)
0.96
10 V
10
0.72
10 V
0.48
15 V
5V
0.24
0
0
1
10
100
FREQUENCY (kHz)
SUPPLY CURRENT (µA)
NO LOAD
BOTH INPUTS LOGIC "1"
TA = 25°C
0.5
5
10
15
SUPPLY VOLTAGE (V)
September 1999
15 V
0.24
0 10 20 30 40 50 60 70 80 90 100
CURRENT SUNK (mA)
Package Power Dissipation
1250
300
200
150
NO LOAD
BOTH INPUTS LOGIC "0"
TA = 25°C
100
50
0
0
0
0.48
Quiescent Power Supply
1.5
20
10 V
0
400 Current vs. Supply Voltage
2.0
1.0
0.72
CURRENT SOURCED (mA)
Quiescent Power Supply
Current vs. Supply Voltage
VS = 5V
0.96
0 10 20 30 40 50 60 70 80 90 100
1000
100
1000
10000
CAPACITIVE LOAD (pF)
1.20
VS = 18V
20
2.5
100
1000
10000
CAPACITIVE LOAD (pF)
1.20
30
TA = 25°C
CL = 1000pF
10
1
0
Supply Current vs. Frequency
tF
200
kHz
20kHz
20
-75 -50 -25 0 25 50 75 100 125 150
TEMPERATURE (°C)
tR
100
50
MAXIMUM PACKAGE
POWER DISSIPATION (mW)
TIME (ns)
0
TIME (ns)
t D2
25
SUPPLY CURRENT (mA)
10
80
CL = 1000pF
VS = 18V
SUPPLY CURRENT (mA)
35
30
tR
20
Supply Current vs.
Capacitive Load
Delay Time vs. Temperature
SUPPLY CURRENT (mA)
t D1
5
0
tF
t D2
TIME (ns)
40
CL = 1000pF
VS = 18V
30
25
TIME (ns)
TIME (ns)
50
40
CL = 1000pF
TA = 25°C
30
20
Rise and Fall Time
vs. Temperature
Delay Time vs. Supply Voltage
0
5
10
15
SUPPLY VOLTAGE (V)
5
20
1000
SOIC
750
500
PDIP
250
0
25
50
75
100
125
150
AMBIENT TEMPERATURE (°C)
MIC4426/4427/4428
MIC4426/4427/4428
Micrel
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).
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 1.0µF film
capacitor in parallel with one or two 0.1µF ceramic MLC
capacitors normally provides adequate bypassing.
Grounding
Load Dissipation
Power dissipation caused by continuous load current (when
driving a resistive load) through the driver’s output resistance
is:
PL = IL2 RO
For capacitive loads, the dissipation in the driver is:
PL = f CL VS2
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.
PT = 2 f VS Q
Charge (Q) is read from the following graph:
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
(< 500µA) , 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
1µA within this range.
The MIC4426/7/8 drives the TL494, SG1526/7, MIC38C42,
TSC170 and similar switch-mode power supply integrated
circuits.
1×10-8
CHARGE (Q)
8×10-9
6×10-9
4×10-9
3×10-9
2×10-9
1×10-9
4
6
8
10 12 14 16
SUPPLY VOLTAGE (V)
18
Crossover Energy Loss per Transition
MIC4426/4427/4428
6
September 1999
MIC4426/4427/4428
Micrel
Package Information
0.026 (0.65)
MAX)
PIN 1
0.157 (3.99)
0.150 (3.81)
DIMENSIONS:
INCHES (MM)
0.020 (0.51)
0.013 (0.33)
0.050 (1.27)
TYP
0.064 (1.63)
0.045 (1.14)
45°
0.0098 (0.249)
0.0040 (0.102)
0.197 (5.0)
0.189 (4.8)
0°–8°
0.010 (0.25)
0.007 (0.18)
0.050 (1.27)
0.016 (0.40)
SEATING
PLANE
0.244 (6.20)
0.228 (5.79)
8-lead SOP (M)
0.199 (5.05)
0.187 (4.74)
0.122 (3.10)
0.112 (2.84)
DIMENSIONS:
INCH (MM)
0.120 (3.05)
0.116 (2.95)
0.036 (0.90)
0.032 (0.81)
0.043 (1.09)
0.038 (0.97)
0.007 (0.18)
0.005 (0.13)
0.012 (0.30) R
0.012 (0.03)
0.0256 (0.65) TYP
0.008 (0.20)
0.004 (0.10)
5° MAX
0° MIN
0.012 (0.03) R
0.039 (0.99)
0.035 (0.89)
0.021 (0.53)
8-lead MM8™ MSOP (MM)
PIN 1
DIMENSIONS:
INCH (MM)
0.380 (9.65)
0.370 (9.40)
0.255 (6.48)
0.245 (6.22)
0.135 (3.43)
0.125 (3.18)
0.300 (7.62)
0.013 (0.330)
0.010 (0.254)
0.018 (0.57)
0.100 (2.54)
0.130 (3.30)
0.380 (9.65)
0.320 (8.13)
0.0375 (0.952)
8-lead Plastic DIP (N)
September 1999
7
MIC4426/4427/4428
MIC4426/4427/4428
Micrel
MICREL INC. 1849 FORTUNE DRIVE SAN JOSE, CA 95131
TEL
+ 1 (408) 944-0800
FAX
+ 1 (408) 944-0970
WEB
USA
http://www.micrel.com
This information is believed to be accurate and reliable, however no responsibility is assumed by Micrel for its use nor for any infringement of patents or
other rights of third parties resulting from its use. No license is granted by implication or otherwise under any patent or patent right of Micrel Inc.
© 1999 Micrel Incorporated
MIC4426/4427/4428
8
September 1999
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