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MOSFET Driver. ADP3120 Datasheet

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MOSFET Driver. ADP3120 Datasheet






ADP3120 Driver. Datasheet pdf. Equivalent




ADP3120 Driver. Datasheet pdf. Equivalent





Part

ADP3120

Description

Dual Bootstrapped 12 V MOSFET Driver



Feature


www.DataSheet4U.com Dual Bootstrapped 1 2 V MOSFET Driver with Output Disable A DP3120 FEATURES All-in-one synchronous buck driver Bootstrapped high-side driv e One PWM signal generates both drives Anticross-conduction protection circuit ry Output disable control turns off bot h MOSFETs to float output per Intel® V RM 10 specification GENERAL DESCRIPTIO N The ADP3120 is a .
Manufacture

Analog Devices

Datasheet
Download ADP3120 Datasheet


Analog Devices ADP3120

ADP3120; dual, high voltage MOSFET driver optimiz ed for driving two N-channel MOSFETs, t he two switches in a nonisolated synchr onous buck power converter. Each of the drivers is capable of driving a 3000 p F load with a 45 ns propagation delay a nd a 25 ns transition time. One of the drivers can be bootstrapped and is desi gned to handle the high voltage slew ra te associated with.


Analog Devices ADP3120

floating high-side gate drivers. The AD P3120 includes overlapping drive protec tion to prevent shoot-through current i n the external MOSFETs. The OD pin shut s off both the high-side and the low-si de MOSFETs to prevent rapid output capa citor discharge during system shutdown. The ADP3120 is specified over the comm ercial temperature range of 0°C to 85 C and is available .


Analog Devices ADP3120

in 8-lead SOIC and 8-lead LFCSP packages . APPLICATIONS Multiphase desktop CPU supplies Single-supply synchronous buck converters SIMPLIFIED FUNCTIONAL BLOC K DIAGRAM 12V VCC 4 D1 ADP3120 BST 1 CBST2 CBST1 IN 2 8 DRVH RG Q1 RBS T DELAY TO INDUCTOR SW 7 CMP VCC 6 CMP 1V CONTROL LOGIC DRVL 5 Q2 DELA Y OD 3 PGND 05591-001 6 Figure 1. R ev. 0 Information .

Part

ADP3120

Description

Dual Bootstrapped 12 V MOSFET Driver



Feature


www.DataSheet4U.com Dual Bootstrapped 1 2 V MOSFET Driver with Output Disable A DP3120 FEATURES All-in-one synchronous buck driver Bootstrapped high-side driv e One PWM signal generates both drives Anticross-conduction protection circuit ry Output disable control turns off bot h MOSFETs to float output per Intel® V RM 10 specification GENERAL DESCRIPTIO N The ADP3120 is a .
Manufacture

Analog Devices

Datasheet
Download ADP3120 Datasheet




 ADP3120
www.DataSheet4U.com
Dual Bootstrapped 12 V MOSFET
Driver with Output Disable
ADP3120
FEATURES
All-in-one synchronous buck driver
Bootstrapped high-side drive
One 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 ADP3120 is a dual, high voltage MOSFET driver optimized
for driving two N-channel MOSFETs, the two switches in a non-
isolated synchronous buck power converter. Each of the drivers
is capable of driving a 3000 pF load with a 45 ns propagation
delay and a 25 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
ADP3120 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 ADP3120 is specified over the commercial temperature
range of 0°C to 85°C and is available in 8-lead SOIC and 8-lead
LFCSP packages.
SIMPLIFIED FUNCTIONAL BLOCK DIAGRAM
12V
ADP3120
IN 2
VCC
4
DELAY
OD 3
CMP
1V
DELAY
CMP
VCC
6
CONTROL
LOGIC
Figure 1.
D1
BST
1
CBST1
DRVH
8
CBST2
RG
Q1
SW
7
RBST
TO
INDUCTOR
DRVL
5
PGND
6
Q2
Rev. 0
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
www.analog.com
Fax: 781.461.3113 © 2005 Analog Devices, Inc. All rights reserved.




 ADP3120
ADP3120
TABLE OF CONTENTS
Specifications..................................................................................... 3
Absolute Maximum Ratings............................................................ 4
ESD Caution.................................................................................. 4
Pin Configurations and Function Descriptions ........................... 5
Timing Characteristics..................................................................... 6
Typical Performance Characteristics ............................................. 7
Theory of Operation ........................................................................ 9
Low-Side Driver............................................................................ 9
High-Side Driver .......................................................................... 9
Overlap Protection Circuit.......................................................... 9
REVISION HISTORY
7/05—Revision 0: Initial Version
Application Information................................................................ 10
Supply Capacitor Selection ....................................................... 10
Bootstrap Circuit........................................................................ 10
MOSFET Selection..................................................................... 10
High-Side (Control) MOSFETs................................................ 10
Low-Side (Synchronous) MOSFETs ........................................ 11
PC Board Layout Considerations............................................. 11
Outline Dimensions ....................................................................... 13
Ordering Guide .......................................................................... 13
Rev. 0 | Page 2 of 16




 ADP3120
ADP3120
SPECIFICATIONS1
VCC = 12 V, BST = 4 V to 26 V, TA = 0°C to 85°C, unless otherwise noted.
Table 1.
Parameter
PWM INPUT
Input Voltage High
Input Voltage Low
Input Current
Hysteresis
Symbol Conditions
OD INPUT
Input Voltage High
Input Voltage Low
Input Current
Hysteresis
Propagation Delay Times2
tpdhlOD
See Figure 4
tpdhlOD
See Figure 4
HIGH-SIDE DRIVER
Output Resistance, Sourcing Current
Output Resistance, Sinking Current
Output Resistance, Unbiased
Transition Times
Propagation Delay Times2
SW Pull-Down Resistance
LOW-SIDE DRIVER
Output Resistance, Sourcing Current
Output Resistance, Sinking Current
Output Resistance, Unbiased
Transition Times
Propagation Delay Times2
Timeout Delay
SUPPLY
Supply Voltage Range
Supply Current
UVLO Voltage
Hysteresis
trDRVH
tfDRVH
tpdhDRVH
tpdlDRVH
BST − SW = 12 V
BST – SW = 12 V
BST – SW = 0 V
BST – SW = 12 V, CLOAD = 3 nF, see Figure 5
BST – SW = 12 V, CLOAD = 3 nF, see Figure 5
BST – SW = 12 V, CLOAD = 3 nF,
25°C ≤ TA ≤ 85°C, see Figure 5
BST – SW = 12 V, CLOAD = 3 nF, see Figure 5
SW to PGND
trDRVL
tfDRVL
tpdhDRVL
tpdlDRVL
VCC
ISYS
VCC = PGND
CLOAD = 3 nF, Figure 5
CLOAD = 3 nF, Figure 5
CLOAD = 3 nF, Figure 5
CLOAD = 3 nF, Figure 5
SW = 5 V
SW = PGND
BST = 12 V, IN = 0 V
VCC rising
1 All limits at temperature extremes are guaranteed via correlation using standard statistical quality control (SQC) methods.
2 For propagation delays, tpdh refers to the specified signal going high, and tpdl refers to it going low.
Min Typ Max Unit
2.0 V
0.8 V
−1 +1 μA
90 250
mV
2.0 V
0.8 V
−1 +1 μA
90 250
mV
20 35 ns
40 55 ns
2.2 3.5 Ω
1.0 2.5 Ω
10 kΩ
25 40 ns
20 30 ns
32 45 70 ns
25 35
10
ns
2.0 3.2
1.0 2.5
10
20 35
16 30
12 35
30 45
110 190
95 150
Ω
Ω
ns
ns
ns
ns
ns
ns
4.15 13.2 V
25
mA
1.5 3.0 V
350 mV
Rev. 0 | Page 3 of 16



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