ADP3418 Disable Datasheet

ADP3418 Datasheet PDF, Equivalent


Part Number

ADP3418

Description

Dual Bootstrapped 12 V MOSFET Driver with Output Disable

Manufacture

Analog Devices

Total Page 12 Pages
PDF Download
Download ADP3418 Datasheet PDF


ADP3418
Dual Bootstrapped 12 V MOSFET
Driver with Output Disable
ADP3418
FEATURES
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 Output per Intel® VRM 10 Specification
APPLICATIONS
Multiphase Desktop CPU Supplies
Single-Supply Synchronous Buck Converters
GENERAL DESCRIPTION
The ADP3418 is a dual high voltage MOSFET driver optimized
for driving two N-channel MOSFETs, which are the two switches
in a nonisolated synchronous buck power converter. Each of the
drivers is capable of driving a 3000 pF load with a 20 ns propa-
gation delay and 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 MOSFETs. The OD pin shuts off both
the high-side and the low-side MOSFETs to prevent rapid output
capacitor discharge during system shutdown.
The ADP3418 is specified over the commercial temperature
range of 0°C to 85°C and is available in a thermally enhanced
8-lead SOIC package.
FUNCTIONAL BLOCK DIAGRAM
VCC
4
IN 2
OVERLAP
PROTECTION
CIRCUIT
OD 3
ADP3418
BST
1
8 DRVH
7 SW
5 DRVL
6
PGND
12V
ADP3418
IN
VCC
4
1V
OD
3
DELAY
+1V
D1
BST
1
CBST
DRVH
8
SW
7
CVCC
Q1
TO INDUCTOR
DRVL
5
PGND
6
Q2
REV. 0
Figure 1. General Application Circuit
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. 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 companies.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781/329-4700
www.analog.com
Fax: 781/326-8703 © 2003 Analog Devices, Inc. All rights reserved.

ADP3418
ADP3418–SPECIFICATIONS1
(VCC = 12 V, BST = 4 V to 26 V, TA = 0؇C to 85؇C, unless otherwise noted.)
Parameter
Symbol Conditions
SUPPLY
Supply Voltage Range
Supply Current
OD INPUT
Input Voltage High
Input Voltage Low
Input Current
Propagation Delay Time2
PWM INPUT
Input Voltage High
Input Voltage Low
Input Current
VCC
ISYS BST = 12 V, IN = 0 V
tpdlOD
tpdhOD
See Figure 2
See Figure 2
HIGH-SIDE DRIVER
Output Resistance, Sourcing Current
Output Resistance, Sinking Current
Transition Times2
Propagation Delay2, 3
trDRVH
tfDRVH
tpdhDRVH
tpdlDRVH
VBST – VSW = 12 V
VBST – VSW = 12 V
See Figure 3, VBST – VSW = 12 V,
CLOAD = 3 nF
See Figure 3, VBST – VSW = 12 V,
CLOAD = 3 nF
See Figure 3, VBST – VSW = 12 V
VBST – VSW = 12 V
LOW-SIDE DRIVER
Output Resistance, Sourcing Current
Output Resistance, Sinking Current
Transition Times2
Propagation Delay2, 3
trDRVL
tfDRVL
tpdhDRVL
tpdlDRVL
See Figure 3, CLOAD = 3 nF
See Figure 3, CLOAD = 3 nF
See Figure 3
See Figure 3
NOTES
1All limits at temperature extremes are guaranteed via correlation using standard Statistical Quality Control (SQC).
2AC specifications are guaranteed by characterization but not production tested.
3For propagation delays, tpdh refers to the specified signal going high, and tpdl refers to it going low.
Specifications subject to change without notice.
Min Typ Max
4.15
3
13.2
6
2.8
–1
15
20
0.8
+1
30
40
3.5
0.8
–1 +1
1.8 3.0
1.0 2.5
35 45
20 30
40 65
20 35
1.8 3.0
1.0 2.5
25 35
21 30
30 60
10 20
Unit
V
mA
V
V
µA
ns
ns
V
V
µA
ns
ns
ns
ns
ns
ns
ns
ns
–2– REV. 0


Features Dual Bootstrapped 12 V MOSFET Driver wit h Output Disable ADP3418 FEATURES All-I n-One Synchronous Buck Driver Bootstrap ped High-Side Drive 1 PWM Signal Genera tes Both Drives Anticross-Conduction Pr otection Circuitry Output Disable Contr ol Turns Off Both MOSFETs to Float Outp ut per Intel® VRM 10 Specification APP LICATIONS Multiphase Desktop CPU Suppli es Single-Supply Synchronous Buck Conve rters GENERAL DESCRIPTION IN FUNCTIONA L BLOCK DIAGRAM VCC 4 BST 1 2 8 DRV H 7 SW OVERLAP PROTECTION CIRCUIT The ADP3418 is a dual high voltage MOSFET driver optimized for driving two N-chan nel MOSFETs, which are the two switches in a nonisolated synchronous buck powe r converter. Each of the drivers is cap able of driving a 3000 pF load with a 2 0 ns propagation delay and a 30 ns tran sition time. One of the drivers can be bootstrapped and is designed to handle the high voltage slew rate associated w ith floating high-side gate drivers. Th e ADP3418 includes overlapping drive protection to prevent shoot.
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