ADP3418KRZ1 [ADI]
Dual Bootstrapped 12 V MOSFET Driver with Output Disable; 双自举12 V MOSFET驱动器输出禁用
| 型号： | ADP3418KRZ1 |
| 厂家： | 
ADI |
| 描述： | Dual Bootstrapped 12 V MOSFET Driver with Output Disable |
| 文件： | 总16页 (文件大小：323K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
Dual Bootstrapped 12 V MOSFET
Driver with Output Disable
ADP3418
FEATURES
GENERAL DESCRIPTION
All-in-one synchronous buck driver
Bootstrapped high-side drive
1 PWM signal generates both drives
Anticross-conduction protection circuitry
Output disable control turns off both MOSFETs to float the
output per Intel® VRM 10 and AMD Opteron specifications
The ADP3418 is a dual, high voltage MOSFET driver optimized
for driving two N-channel MOSFETs, the two switches in a
nonisolated, synchronous, buck power converter. Each of the
drivers is capable of driving a 3000 pF load with a 30 ns transition
time. One of the drivers can be bootstrapped, and is designed to
handle the high voltage slew rate associated with floating high-
side gate drivers. The ADP3418 includes overlapping drive
protection to prevent shoot-through current in the external
APPLICATIONS
Multiphase desktop CPU supplies
Single-supply synchronous buck converters
OD
MOSFETs. The
pin shuts off both the high-side and the
low-side MOSFETs to prevent rapid output capacitor discharge
during system shutdowns.
The ADP3418 is specified over the commercial temperature
range of 0°C to 85°C, and is available in an 8-lead SOIC
package.
FUNCTIONAL BLOCK DIAGRAM
12V
C
VCC
D1
VCC
4
C
BST2
ADP3418
BST
1
8
C
R
BST1
2
IN
DRVH
Q1
R
G
DELAY
TO
INDUCTOR
BST1
SW
7
CMP
VCC
6
S
R
Q
Q
DELAY
DRVL
PGND
5
6
Q2
CMP
1V
3
OD
Figure 1.
Rev. B
Information furnished by Analog Devices is believed to be accurate and reliable.
However, no responsibility is assumed by Analog Devices for its use, nor for any
infringements of patents or other rights of third parties that may result from its use.
Specifications subject to change without notice. No license is granted by implication
or otherwise under any patent or patent rights of Analog Devices. Trademarks and
registered trademarks are the property of their respective owners.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781.329.4700
Fax: 781.326.8703
www.analog.com
© 2004 Analog Devices, Inc. All rights reserved.
ADP3418
TABLE OF CONTENTS
Specifications..................................................................................... 3
Overlap Protection Circuit...........................................................9
Application Information................................................................ 10
Supply Capacitor Selection ....................................................... 10
Bootstrap Circuit........................................................................ 10
MOSFET Selection..................................................................... 10
PC Board Layout Considerations................................................. 12
Outline Dimensions....................................................................... 14
Ordering Guide .......................................................................... 14
Absolute Maximum Ratings............................................................ 4
ESD Caution.................................................................................. 4
Pin Configuration and Function Descriptions............................. 5
Timing Characteristics..................................................................... 6
Typical Performance Characteristics ............................................. 7
Theory of Operation ........................................................................ 9
Low-Side Driver............................................................................ 9
High-Side Driver .......................................................................... 9
REVISION HISTORY
8/04—Data Sheet Changed from Rev. A to Rev. B
Updated Figure 1; Deleted Figure 2.....................................................1
Updated Specifications Table ...............................................................3
Updated Pin Description......................................................................5
Updated Theory of Operation.............................................................9
Updated Applications Section............................................................10
Change to Ordering Guide.................................................................14
4/04—Data Sheet Changed from Rev. 0 to Rev. A
Updated Format...................................................................... Universal
Change to General Description ...........................................................1
Change to Figure 13 ..............................................................................8
Change to Ordering Guide.................................................................12
3/03—Revision 0: Initial Version
Rev. B | Page 2 of 16
ADP3418
SPECIFICATIONS1
VCC = 12 V, BST = 4 V to 26 V, TA = 0°C to 85°C, unless otherwise noted.
Table 1.
Parameter
Symbol
Conditions
Min
Typ
Max
Unit
SUPPLY
Supply Voltage Range
Supply Current
OD INPUT
VCC
ISYS
4.15
13.2
6
V
mA
BST = 12 V, IN = 0 V
3
Input Voltage High
Input Voltage Low
Input Current
2.6
–1
V
V
µA
ns
0.8
+1
40
Propagation Delay Time
tpdh
See Figure 3
See Figure 3
25
20
OD
tpdl
40
ns
OD
PWM INPUT
Input Voltage High
Input Voltage Low
Input Current
3.0
–1
V
V
µA
0.8
+1
HIGH-SIDE DRIVER
Output Resistance, Sourcing Current
Output Resistance, Sinking Current
Transition Times
VBST − VSW = 12 V
VBST − VSW = 12 V
See Figure 4, VBST − VSW = 12 V,
CLOAD = 3 nF
See Figure 4, VBST − VSW = 12 V,
CLOAD = 3 nF
See Figure 4, VBST − VSW = 12 V
VBST − VSW = 12 V
1.8
1.0
35
3.0
2.5
45
Ω
Ω
ns
trDRVH
tfDRVH
20
30
ns
Propagation Delay2
tpdhDRVH
tpdlDRVH
40
20
65
35
ns
ns
LOW-SIDE DRIVER
Output Resistance, Sourcing Current
Output Resistance, Sinking Current
Transition Times
1.8
1.0
25
21
30
10
240
120
3.0
2.5
35
30
60
20
Ω
Ω
trDRVL
tfDRVL
tpdhDRVL
tpdlDRVL
See Figure 4, CLOAD = 3 nF
See Figure 4, CLOAD = 3 nF
See Figure 4
See Figure 4
SW = 5 V
ns
ns
ns
ns
ns
ns
2
Propagation Delay
Timeout Delay
SW = PGND
90
1 All limits at temperature extremes are guaranteed via correlation using standard Statistical Quality Control (SQC).
2 For propagation delays, tpdh refers to the specified signal going high, and tpdl refers to it going low.
Rev. B | Page 3 of 16
ADP3418
ABSOLUTE MAXIMUM RATINGS
Table 2.
Stresses above those listed under Absolute Maximum Ratings
may cause permanent damage to the device. This is a stress
rating only; functional operation of the device at these or any
other conditions above those indicated in the operational
section of this specification is not implied. Exposure to absolute
maximum rating conditions for extended periods may affect
device reliability. Absolute maximum ratings apply individually
only, not in combination. Unless otherwise specified, all voltages
are referenced to PGND.
Parameter
Rating
VCC
–0.3 V to +15 V
BST
DC
<200 ns
–0.3 V to VCC + 15 V
–0.3 V to 36 V
BST to SW
–0.3 V to +15 V
SW
DC
–5 V to +15 V
< 200 ns
–10 V to +25 V
DRVH
SW – 0.3 V to BST + 0.3 V
–2 V to VCC + 0.3 V
–0.3 V to VCC + 0.3 V
0°C to 85°C
DRVL (< 200 ns)
All Other Inputs and Outputs
Operating Ambient Temperature
Range
Operating Junction Temperature
Range
0°C to 150°C
Storage Temperature Range
–65°C to +150°C
Junction-to-Air Thermal Resistance
(θJA)
2-Layer Board
4-Layer Board
Lead Temperature (Soldering, 10 s)
Infrared (15 s)
123°C/W
90°C/W
300°C
260°C
ESD CAUTION
ESD (electrostatic discharge) sensitive device. Electrostatic charges as high as 4000 V readily accumulate on
the human body and test equipment and can discharge without detection. Although this product features
proprietary ESD protection circuitry, permanent damage may occur on devices subjected to high energy
electrostatic discharges. Therefore, proper ESD precautions are recommended to avoid performance
degradation or loss of functionality.
Rev. B | Page 4 of 16
ADP3418
PIN CONFIGURATION AND FUNCTION DESCRIPTIONS
BST
IN
1
2
3
4
8
7
6
5
DRVH
SW
AD3418
TOP VIEW
(Not to Scale)
OD
PGND
DRVL
VCC
Figure 2. Pin Configuration
Table 3. Pin Function Descriptions
Pin No. Mnemonic Description
1
BST
Upper MOSFET Floating Bootstrap Supply. A capacitor connected between the BST and SW pins holds this
bootstrapped voltage for the high-side MOSFET as it is switched. The capacitor should be between 100 nF and 1 µF.
2
3
4
5
6
7
IN
OD
Logic Level Input. This pin has primary control of the drive outputs.
Output Disable. When low, this pin disables normal operation, forcing DRVH and DRVL low.
Input Supply. This pin should be bypassed to PGND with ~1 µF ceramic capacitor.
Synchronous Rectifier Drive. Output drive for the lower (synchronous rectifier) MOSFET.
Power Ground. Should be closely connected to the source of the lower MOSFET.
This pin is connected to the buck switching node, close to the upper MOSFET’s source. It is the floating return for
the upper MOSFET drive signal.
VCC
DRVL
PGND
SW
8
DRVH
Buck Drive. Output drive for the upper (buck) MOSFET.
Rev. B | Page 5 of 16
ADP3418
TIMING CHARACTERISTICS
OD
tpdlOD
tpdhOD
90%
DRVH
OR DRVL
10%
Figure 3. Output Disable Timing Diagram
IN
trDRVL
tpdlDRVL tfDRVL
tpdlDRVH
DRVL
tfDRVH
tpdhDRVH trDRVH
V
TH
V
DRVH-SW
TH
tpdhDRVL
SW
1V
Figure 4. Timing Diagram. Timing is referenced to the 90% and 10% points, unless otherwise noted.
Rev. B | Page 6 of 16
ADP3418
TYPICAL PERFORMANCE CHARACTERISTICS
26
24
22
20
18
16
V
C
= 12V
CC
IN
= 3nF
LOAD
1
DRVL
DRVH
DRVH
2
DRVL
3
0
25
50
75
100
125
JUNCTION TEMPERATURE (°C)
Figure 5. DRVH Rise and DRVL Fall Times
Figure 8. DRVH and DRVL Fall Times vs. Temperature
60
50
40
30
20
10
IN
T
V
=25°C
A
= 12V
CC
DRVH
DRVL
1
DRVH
2
DRVL
3
1
2
3
4
5
LOAD CAPACITANCE (nF)
Figure 6. DRVH Fall and DRVL Rise Times
Figure 9. DRVH and DRVL Rise Times vs. Load Capacitance
40
35
30
25
20
15
10
V
C
= 12V
CC
T
=25°C
A
= 3nF
LOAD
V
= 12V
CC
DRVH
35
30
25
20
DRVL
DRVH
DRVL
0
25
50
75
100
125
1
2
3
4
5
JUNCTION TEMPERATURE (°C)
LOAD CAPACITANCE (nF)
Figure 7. DRVH and DRVL Rise Times vs. Temperature
Figure 10. DRVH and DRVL Fall Times vs. Load Capacitance
Rev. B | Page 7 of 16
ADP3418
60
5
4
3
2
1
0
T
V
C
=25°C
A
T
C
= 25°C
A
= 12V
CC
= 3nF
LOAD
= 3nF
LOAD
40
20
0
0
200
400
600
800
1000
1200
0
1
2
3
4
5
IN FREQUENCY (kHz)
V
VOLTAGE (V)
CC
Figure 11. Supply Current vs. Frequency
Figure 13. DRVL Output Voltage vs. Supply Voltage
16
15
14
13
12
V
C
= 12V
CC
= 3nF
LOAD
f
= 250kHz
IN
0
25
50
75
100
125
JUNCTION TEMPERATURE (°C)
Figure 12. Supply Current vs. Temperature
Rev. B | Page 8 of 16
ADP3418
THEORY OF OPERATION
The ADP3418 is a dual MOSFET driver optimized for driving
two N-channel MOSFETs in a synchronous buck converter
topology. A single PWM input signal is all that is required to
properly drive the high-side and the low-side MOSFETs. Each
driver is capable of driving a 3 nF load at speeds up to 500 kHz.
OVERLAP PROTECTION CIRCUIT
The overlap protection circuit prevents both of the main power
switches, Q1 and Q2, from being on at the same time. This is
done to prevent shoot-through currents from flowing through
both power switches and the associated losses that can occur
during their on/off transitions. The overlap protection circuit
accomplishes this by adaptively controlling the delay from the
Q1 turn off to the Q2 turn on, and by internally setting the
delay from the Q2 turn off to the Q1 turn on.
A more detailed description of the ADP3418 and its features
follows. Refer to Figure 1.
LOW-SIDE DRIVER
The low-side driver is designed to drive a ground-referenced
N-channel MOSFET. The bias to the low-side driver is internally
connected to the VCC supply and PGND.
To prevent the overlap of the gate drives during the Q1 turn off
and the Q2 turn on, the overlap circuit monitors the voltage at
the SW pin. When the PWM input signal goes low, Q1 will
begin to turn off (after propagation delay). Before Q2 can turn
on, the overlap protection circuit makes sure that SW has first
gone high and then waits for the voltage at the SW pin to fall
from VIN to 1 V. Once the voltage on the SW pin has fallen to
1 V, Q2 begins turn on. If the SW pin had not gone high first,
then the Q2 turn on is delayed by a fixed 120 ns. By waiting for
the voltage on the SW pin to reach 1 V or for the fixed delay
time, the overlap protection circuit ensures that Q1 is off before
Q2 turns on, regardless of variations in temperature, supply
voltage, input pulse width, gate charge, and drive current. If SW
does not go below 1 V after 240 ns, DRVL will turn on. This can
occur if the current flowing in the output inductor is negative
and is flowing through the high-side MOSFET body diode.
When the driver is enabled, the driver’s output is 180 degrees
out of phase with the PWM input. When the ADP3418 is dis-
abled, the low-side gate is held low.
HIGH-SIDE DRIVER
The high-side driver is designed to drive a floating N-channel
MOSFET. The bias voltage for the high-side driver is developed
by an external bootstrap supply circuit, which is connected
between the BST and SW pins.
The bootstrap circuit comprises a diode, D1, and bootstrap
capacitor, CBST1. CBST2 and RBST are included to reduce the high-
side gate drive voltage and limit the switch node slew-rate
(referred to as a Boot-Snap™ circuit, see the Application
Information section for more details). When the ADP3418 is
starting up, the SW pin is at ground, so the bootstrap capacitor
will charge up to VCC through D1. When the PWM input goes
high, the high-side driver will begin to turn on the high-side
MOSFET, Q1, by pulling charge out of CBST1 and CBST2. As Q1
turns on, the SW pin will rise up to VIN, forcing the BST pin to
VIN + VC(BST), which is enough gate-to-source voltage to hold Q1
on. To complete the cycle, Q1 is switched off by pulling the gate
down to the voltage at the SW pin. When the low-side MOSFET,
Q2, turns on, the SW pin is pulled to ground. This allows the
bootstrap capacitor to charge up to VCC again.
To prevent the overlap of the gate drives during the Q2 turn off
and the Q1 turn on, the overlap circuit provides an internal
delay that is set to 40 ns. When the PWM input signal goes high,
Q2 will begin to turn off (after a propagation delay), but before
Q1 can turn on, the overlap protection circuit waits for the
voltage at DRVL to drop to approximately one sixth of VCC
.
Once the voltage at DRVL has reached this point, the overlap
protection circuit will wait for the 40 ns internal delay time.
Once the delay period has expired, Q1 will begin turn on.
The high-side driver’s output is in phase with the PWM input.
When the driver is disabled, the high-side gate is held low.
Rev. B | Page 9 of 16
ADP3418
APPLICATION INFORMATION
A small-signal diode can be used for the bootstrap diode due to
the ample gate drive voltage supplied by VCC. The bootstrap
diode must have a minimum 15 V rating to withstand the
maximum supply voltage. The average forward current can be
estimated by
SUPPLY CAPACITOR SELECTION
For the supply input (VCC) of the ADP3418, a local bypass
capacitor is recommended to reduce the noise and to supply
some of the peak currents drawn. Use a 4.7 µF, low ESR
capacitor. Multilayer ceramic chip (MLCC) capacitors provide
the best combination of low ESR and small size. Keep the
ceramic capacitor as close as possible to the ADP3418.
IF(AVG) = QGATE × fMAX
(3)
where fMAX is the maximum switching frequency of the
controller. The peak surge current rating should be calculated
using:
BOOTSTRAP CIRCUIT
The bootstrap circuit uses a charge storage capacitor (CBST) and
a diode, as shown in Figure 1. These components can be
selected after the high-side MOSFET has been chosen. The
bootstrap capacitor must have a voltage rating that is able to
handle twice the maximum supply voltage. A minimum 50 V
rating is recommended. The capacitor values are determined
using the following equations:
VCC −VD
(4)
IF(PEAK )
=
RBST
MOSFET SELECTION
When interfacing the ADP3418 to external MOSFETs, there are
a few considerations that the designer should be aware of. These
will help to make a more robust design that will minimize
stresses on both the driver and MOSFETs. These stresses
include exceeding the short-time duration voltage ratings on
the driver pins as well as the external MOSFET.
QGATE
C
BST1 +CBST2=10×
(1)
VGATE
VGATE
CBST1
BST1 +CBST2 VCC −VD
=
(2)
C
where QGATE is the total gate charge of the high-side MOSFET at
VGATE, VGATE is the desired gate drive voltage (usually in the
range of 5-10 V, 7 V being typical), and VD is the voltage drop
across D1. Rearranging Equations 1 and 2 to solve for CBST1
yields
It is also highly recommended to use the Boot-Snap circuit to
improve the interaction of the driver with the characteristics of
the MOSFETs. If a simple bootstrap arrangement is used, make
sure to then include a proper snubber network on the SW node.
QGATE
VCC −VD
High-Side (Control) MOSFETs
C
BST1=10×
The high-side MOSFET is usually selected to be high speed to
minimize switching losses (see any ADI Flex-mode™ controller
datasheet for more details on MOSFET losses). This usually
implies a low gate resistance and low input capacitance/charge
device. Yet, there is also a significant source lead inductance that
can exist (this depends mainly on the MOSFET package; it is
best to contact the MOSFET vendor for this information).
CBST2 can then be found by rearranging Equation 1:
QGATE
VGATE
C
BST2=10×
−CBST1
For example, an NTD60N02 has a total gate charge of about
12 nC at VGATE = 7 V. Using VCC = 12 V and VD = 1 V, we find
C
BST1 = 12 nF and CBST2 = 6.8 nF. Good quality ceramic
The ADP3418 DRVH output impedance and the input
resistance of the MOSFETs determine the rate of charge
delivery to the gate’s internal capacitance, which determines the
speed at which the MOSFETs turn on and off. However, due to
potentially large currents flowing in the MOSFETs at the on and
off times (this current is usually larger at turn off due to
ramping up of the output current in the output inductor), the
source lead inductance will generate a significant voltage across
it when the high-side MOSFETs switch off. This will create a
significant drain-source voltage spike across the internal die of
the MOSFETs and can lead to catastrophic avalanche. The
mechanisms involved in this avalanche condition can be
referenced in literature from the MOSFET suppliers.
capacitors should be used.
RBST is used for slew-rate limiting to minimize the ringing at the
switch node. It also provides peak current limiting through D1.
An RBST value of 1.5 Ω to 2.2 Ω is a good choice. The resistor
needs to be able to handle at least 250 mW due to the peak
currents that flow through it.
Rev. B | Page 10 of 16
ADP3418
The MOSFET vendor should provide a maximum voltage slew
rate at drain current rating such that this can be designed
around. Once you have this specification, the next step is to
determine the maximum current you expect to see in the
MOSFET. This can be done with the following equation:
does not exceed the thermal rating of the driver (see the Flex-
mode controller data sheet for details).
The next concern for the low-side MOSFETs is based on
preventing them from inadvertently being switched on when
the high-side MOSFET turns on. This occurs due to the drain-
gate (Miller, also specified as Crss) capacitance of the MOSFET.
When the drain of the low-side MOSFET is switched to VCC by
the high-side turning on (at a rate dV/dt), the internal gate of
the low-side MOSFET will be pulled up by an amount roughly
equal to VCC × (Crss/Ciss). It is important to make sure this does
not put the MOSFET into conduction.
DMAX
f MAX × LOUT
(
VCC −VOUT ×
)
(5)
I MAX = IDC (per phase) +
Here, DMAX is determined for the VR controller being used with
the driver. Please note this current gets divided roughly equally
between MOSFETs if more than one is used (assume a worst-
case mismatch of 30% for design margin). LOUT is the output
inductor value.
Another consideration is the non-overlap circuitry of the
ADP3418 which attempts to minimize the non-overlap period.
During the state of the high-side turning off to low-side turning
on, the SW pin is monitored (as well as the conditions of SW
prior to switching) to adequately prevent overlap.
When producing your design, there is no exact method for
calculating the dV/dt due to the parasitic effects in the external
MOSFETs as well as the PCB. However, it can be measured to
determine if it is safe. If it appears the dV/dt is too fast, an
optional gate resistor can be added between DRVH and the
high-side MOSFETs. This resistor will slow down the dV/dt, but
it will also increase the switching losses in the high-side
MOSFETs. The ADP3418 has been optimally designed with an
internal drive impedance that will work with most MOSFETs to
switch them efficiently yet minimize dV/dt. However, some
high-speed MOSFETs may require this external gate resistor
depending on the currents being switched in the MOSFET.
However, during the low-side turn off to high-side turn on, the
SW pin does not contain information for determining the
proper switching time, so the state of the DRVL pin is
monitored to go below one sixth of VCC and then a delay is
added. But due to the Miller capacitance and internal delays of
the low-side MOSFET gate, one must ensure the Miller to input
capacitance ratio is low enough and the low-side MOSFET
internal delays are not large enough to allow accidental turn on
of the low-side when the high-side turns on.
Low-Side (Synchronous) MOSFETs
The low-side MOSFETs are usually selected to have a low on-
resistance to minimize conduction losses. This usually implies a
large input gate capacitance and gate charge. The first concern is
to make sure the power delivery from the ADP3418’s DRVL
A spreadsheet is available from ADI that will assist the designer
in the proper selection of low-side MOSFETs.
Rev. B | Page 11 of 16
ADP3418
PC BOARD LAYOUT CONSIDERATIONS
C
C
BST1
Use the following general guidelines when designing printed
circuit boards.
R
BST
BST2
•
•
•
•
Trace out the high current paths and use short, wide
(>20 mil) traces to make these connections.
Connect the PGND pin of the ADP3418 as closely as
possible to the source of the lower MOSFET.
The VCC bypass capacitor should be located as close as
possible to the VCC and PGND pins.
D1
Use vias to other layers when possible to maximize thermal
conduction away from the IC.
The circuit in Figure 15 shows how four drivers can be
combined with the ADP3188 to form a total power conversion
solution for generating VCC(CORE) for an Intel CPU that is VRD
10.x compliant.
Figure 14 shows an example of the typical land patterns based
on the guidelines given previously. For more detailed layout
guidelines for a complete CPU voltage regulator subsystem,
refer to the ADP3188 data sheet.
C
VCC
Figure 14. External Component Placement Example for the ADP3418 Driver
Rev. B | Page 12 of 16
ADP3418
Figure 15. VRD 10.x Compliant Intel CPU Supply Circuit
Rev. B | Page 13 of 16
ADP3418
OUTLINE DIMENSIONS
5.00 (0.1968)
4.80 (0.1890)
8
1
5
4
6.20 (0.2440)
5.80 (0.2284)
4.00 (0.1574)
3.80 (0.1497)
1.27 (0.0500)
BSC
0.50 (0.0196)
0.25 (0.0099)
× 45°
1.75 (0.0688)
1.35 (0.0532)
0.25 (0.0098)
0.10 (0.0040)
8°
0.51 (0.0201)
0.31 (0.0122)
0° 1.27 (0.0500)
COPLANARITY
0.10
0.25 (0.0098)
0.17 (0.0067)
SEATING
PLANE
0.40 (0.0157)
COMPLIANT TO JEDEC STANDARDS MS-012AA
CONTROLLING DIMENSIONS ARE IN MILLIMETERS; INCH DIMENSIONS
(IN PARENTHESES) ARE ROUNDED-OFF MILLIMETER EQUIVALENTS FOR
REFERENCE ONLY AND ARE NOT APPROPRIATE FOR USE IN DESIGN
Figure 16. 8-Lead Standard Small Outline Package [SOIC]
Narrow Body (R-8)
Dimensions shown in millimeters and (inches)
ORDERING GUIDE
Model
Temperature Range
0°C to 85°C
0°C to 85°C
Package Description
Package Option
RN-8
RN-8
ADP3418KRZ1
SOIC
SOIC
ADP3418KRZ–REEL1
1
Z = Pb-free part.
Rev. B | Page 14 of 16
ADP3418
NOTES
Rev. B | Page 15 of 16
ADP3418
NOTES
©
2004 Analog Devices, Inc. All rights reserved. Trademarks
and registered trademarks are the property of their respective owners.
C03229–0–8/04(B)
Rev. B | Page 16 of 16
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