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ADP3412 Datasheet

Dual MOSFET Driver with Bootstrapping

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ADP3412 pdf
a
FEATURES
All-In-One Synchronous Buck Driver
Bootstrapped High-Side Drive
One PWM Signal Generates Both Drives
Programmable Transition Delay
Anticross-Conduction Protection Circuitry
APPLICATIONS
Multiphase Desktop CPU Supplies
Mobile Computing CPU Core Power Converters
Single-Supply Synchronous Buck Converters
Standard-to-Synchronous Converter Adaptations
Dual MOSFET Driver
with Bootstrapping
ADP3412
FUNCTIONAL BLOCK DIAGRAM
VCC
BST
ADP3412
IN
DLY
OVERLAP
PROTECTION
CIRCUIT
DRVH
SW
DRVL
GENERAL DESCRIPTION
The ADP3412 is a dual 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 floatinghigh-side gate drivers. The
ADP3412 includes overlapping drive protection (ODP) to pre-
vent shoot-through current in the external MOSFETs.
ADP3412
IN
DLY
CDLY
DELAY
1V
PGND
5V
VCC
12V
D1
BST
DRVH
CBST
Q1
SW
1V
DRVL
PGND
Q2
Figure 1. General Application Circuit
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
which may result from its use. No license is granted by implication or
otherwise under any patent or patent rights of Analog Devices.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781/329-4700 World Wide Web Site: http://www.analog.com
Fax: 781/326-8703
© Analog Devices, Inc., 2000


Analog Devices Semiconductor Electronic Components Datasheet

ADP3412 Datasheet

Dual MOSFET Driver with Bootstrapping

No Preview Available !

ADP3412 pdf
ADP3412–SPECIFICATIONS1
(TA = 0؇C to 70؇C, VCC = 5 V, BST = 4 V to 26 V, unless otherwise noted.)
Parameter
Symbol
Conditions
Min
SUPPLY
Supply Voltage Range
Quiescent Current
PWM INPUT
Input Voltage High2
Input Voltage Low2
VCC
ICCQ
4.15
2.0
HIGH-SIDE DRIVER
Output Resistance, Sourcing Current
Output Resistance, Sinking Current
Transition Times3 (See Figure 2)
Propagation Delay3, 4 (See Figure 2)
trDRVH, tfDRVH
tpdhDRVH
tpdlDRVH
VBST VSW = 4.6 V
VBST VSW = 4.6 V
VBST VSW = 4.6 V, CLOAD = 3 nF
VBST VSW = 4.6 V
VBST VSW = 4.6 V
10
LOW-SIDE DRIVER
Output Resistance, Sourcing Current
Output Resistance, Sinking Current
Transition Times3 (See Figure 2)
Propagation Delay3, 4 (See Figure 2)
trDRVL, tfDRVL
tpdhDRVL
tpdlDRVL
VCC = 4.6 V
VCC = 4.6 V
VCC = 4.6 V, CLOAD = 3 nF
VCC = 4.6 V
VCC = 4.6 V
NOTES
1All limits at temperature extremes are guaranteed via correlation using standard Statistical Quality Control (SQC) methods.
2Logic inputs meet typical CMOS I/O conditions for source/sink current (~1 µA).
3AC specifications are guaranteed by characterization, but not production tested.
4For propagation delays, tpdhrefers to the specified signal going high; tpdlrefers to it going low.
5Maximum propagation delay = 40 ns + (1 ns/pF ϫ CDLY).
Specifications subject to change without notice.
Typ
5.0
1
2.5
2.5
20
20
2.5
2.5
20
Max Unit
7.5 V
2 mA
V
0.8 V
5
5
35
Note 5
25
ns
ns
ns
5
5
35 ns
30 ns
25 ns
ABSOLUTE MAXIMUM RATINGS*
VCC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.3 V to +8 V
BST . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.3 V to +30 V
BST to SW . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.3 V to +8 V
SW . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5.0 V to +25 V
IN . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.3 V to VCC + 0.3 V
Operating Ambient Temperature Range . . . . . . . 0°C to 70°C
Operating Junction Temperature Range . . . . . . 0°C to 125°C
θJA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 155°C/W
θJC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40°C/W
Storage Temperature Range . . . . . . . . . . . . 65°C to +150°C
Lead Temperature (Soldering, 10 sec) . . . . . . . . . . . . . 300°C
*This is a stress rating only; operation beyond these limits can cause the device to
be permanently damaged. Unless otherwise specified, all voltages are referenced
to PGND.
–2– REV. 0


Part Number ADP3412
Description Dual MOSFET Driver with Bootstrapping
Maker Analog Devices
Total Page 8 Pages
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