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ADP3415KRM-Reel Schematic ( PDF Datasheet ) - Analog Devices

Teilenummer ADP3415KRM-Reel
Beschreibung Dual MOSFET Driver with Bootstrapping
Hersteller Analog Devices
Logo Analog Devices Logo 




Gesamt 8 Seiten
ADP3415KRM-Reel Datasheet, Funktion
PRELIMINARY TECHNICAL DATA
a
Dual MOSFET Driver
with Bootstrapping
Preliminary Technical Data
ADP3415
FEATURES
All-In-One Synchronous Buck Driver
One PWM Signal Generates Both Drives
Anticross-Conduction Protection Circuitry
Programmable Transition Delay
Zero-Crossing Synchronous Drive Control
Synchronous Override Control
Undervoltage Lockout
Shutdown Quiescent Current < 10 mA
APPLICATIONS
Mobile Computing CPU Core Power Converters
Multiphase Desktop CPU Supplies
Single-Supply Synchronous Buck Converters
Standard-to-Synchronous Converter Adaptations
FUNCTIONAL BLOCK DIAGRAM
VCC
IN
SD
DLY
DRVLSD
GND
UVLO
OVERLAP
PROTECTION
CIRCUIT
ADP3415
BST
DRVH
SW
VCC
DRVL
GENERAL DESCRIPTION
The ADP3415 is a dual MOSFET driver optimized for driving
two N-channel FETs that are the two switches in the noniso-
lated synchronous buck power converter topology. The driver
sizes are each optimized for performance in notebook PC regula-
tors for CPUs in the 20-amp range. The high-side driver can be
bootstrapped atop the switched node of the buck converter as
needed to drive the upper switch, and is designed to accommo-
date the high voltage slew-rate associated with high-performance
high-frequency switching. The ADP3415 has several features: an
overlapping protection circuit (OPC) undervoltage lockout (UVLO)
that holds the switches off until the driver is assured of having
sufficient voltage for proper operation, a programmable transition
delay, and a synchronous drive disable pin. The quiescent
current, when the device is disabled, is less than 100 mA.
The ADP3415 is available in a 10-lead MSOP package.
5V VDC-IN
FROM DUTY RATIO
MODULATOR
FROM SYSTEM
ENABLE CONTROL
FROM SYSTEM
STATE LOGIC
IN
VCC
BST
SD DRVH
ADP3415
DRVLSD
SW
DLY
DRVL
GND
Figure 1. Typical Application Circuit
VOUT
REV. PrA
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.
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
© Analog Devices, Inc., 2002






ADP3415KRM-Reel Datasheet, Funktion
ADP3415
PRELIMINARY TECHNICAL DATA
52
VCC = 5V
47 CLOAD = 3nF
42 tpdl DRVH
37
32
27
22
17
tpdl DRVL
12
7
2
0 25 50 75 100
JUNCTION TEMPERATURE ؇C
TPC 7. DRVH and DRVL Propagation
Delay vs. Temperature
125
45
VCC = 5V
40 TA = 25؇C
CLOAD = 3nF
35
30
25
20
15
10
5
0
200 400 600 800 1000
IN FREQUENCY kHz
TPC 10. Current vs. Frequency
1200
52
VCC = 5V
47 TA = 25؇C
42
37
32 DRVL
27
DRVH
22
17
12
7
1 2 3 4 5 6 7 8 9 10
LOAD CAPACITANCE uF
TPC 8. DRVH and DRVL Fall Time vs. Load Capacitance
10.5
10.0
9.5
9.0
8.5
8.0
7.5
7.0
VCC = 5V
6.5 fIN = 250kHz
CLOAD = 3nF
6.0
0
25
50 75
JUNCTION TEMPERATURE ؇C
100
TPC 11. Current vs. Temperature
125
182
VCC = 5V
162
fIN = 200kHz
CLOAD = 3nF
142
OPEN DELAY PIN
122
102
82
62
42
SHORTED TO GROUND
22
2
0 25 50 75 100
JUNCTION TEMPERATURE ؇C
TPC 9. tPDH DRVH vs. Temperature
125
–6– REV. PrA

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