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PDF ADP3418 Data sheet ( Hoja de datos )
| Número de pieza | ADP3418 | |
| Descripción | Dual Bootstrapped 12 V MOSFET Driver with Output Disable | |
| Fabricantes | Analog Devices | |
| Logotipo |  |
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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.
1 page  
Typical Performance Characteristics–ADP3418
IN
1
DRVH
2
DRVL
3
TPC 1. DRVH Rise and DRVL Fall Times
26
VCC = 12V
CLOAD = 3nF
24
22
20
DRVL
DRVH
18
16
0
25 50
75 100
JUNCTION TEMPERATURE – ؇C
125
TPC 4. DRVH and DRVL Fall Times vs. Temperature
IN
1
DRVH
2
DRVL
3
TPC 2. DRVH Fall and DRVL Rise Times
40
VCC = 12V
CLOAD = 3nF
35
DRVH
30
DRVL
25
20
0
25 50
75 100
JUNCTION TEMPERATURE – ؇C
125
TPC 3. DRVH and DRVL Rise Times vs. Temperature
60
TA = 25؇C
VCC = 12V
50
DRVH
40
DRVL
30
20
10
1
2 34
LOAD CAPACITANCE – nF
5
TPC 5. DRVH and DRVL Rise Times vs. Load Capacitance
35
TA = 25؇C
VCC = 12V
30
25
20
DRVL
DRVH
15
10
1
2 34
LOAD CAPACITANCE – nF
5
TPC 6. DRVH and DRVL Fall Times vs. Load Capacitance
REV. 0
–5–
5 Page 
–11–
11 Page | ||
| Páginas | Total 12 Páginas | |
| PDF Descargar | [ Datasheet ADP3418.PDF ] | |
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