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FDS6298 датащи(PDF) 1 Page - Analog Devices

номер детали FDS6298
подробное описание детали  20 V, 6 A Synchronous Step-Down
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производитель  AD [Analog Devices]
домашняя страница  http://www.analog.com
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FDS6298 датащи(HTML) 1 Page - Analog Devices

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20 V, 6 A Synchronous Step-Down
Regulator with Low-Side Driver
Data Sheet
ADP2381
FEATURES
Input voltage: 4.5 V to 20 V
Integrated 44 mΩ high-side MOSFET
0.6 V ± 1% reference voltage over temperature
Continuous output current: 6 A
Programmable switching frequency: 250 kHz to 1.4 MHz
Synchronizes to external clock: 250 kHz to 1.4 MHz
180° out-of-phase synchronization
Programmable UVLO
Power-good output
External compensation
Internal soft start with external adjustable option
Startup into a precharged output
Supported by ADIsimPower design tool
APPLICATIONS
Communication infrastructure
Networking and servers
Industrial and instrumentation
Healthcare and medical
Intermediate power rail conversion
DC-to-dc point of load application
TYPICAL APPLICATIONS CIRCUIT
Figure 1.
Figure 2. ADP2381 Efficiency vs. Output Current, VIN = 12 V, fSW = 250 kHz
GENERAL DESCRIPTION
The ADP2381 is a current mode control, synchronous, step-
down, dc-to-dc regulator. It integrates a 44 mΩ power MOSFET
and a low-side driver to provide a high efficiency solution. The
ADP2381 runs from an input voltage of 4.5 V to 20 V and can
deliver 6 A of output current. The output voltage can be
adjusted to 0.6 V to 90% of the input voltage. The switching
frequency of the ADP2381 can be programmed from
250 kHz to 1.4 MHz or fixed at 290 kHz or 550 kHz. The
synchronization function allows the switching frequency to be
synchronized to an external clock to minimize system noise.
External compensation and an adjustable soft start provide
design flexibility. The power-good output provides simple and
reliable power sequencing. Additional features include
programmable undervoltage lockout (UVLO), overvoltage
protection (OVP), overcurrent protection (OCP), and thermal
shutdown (TSD).
The ADP2381 operates over the −40°C to +125°C junction
temperature range and is available in a 16-lead TSSOP_EP
package.
ADP2381
1
PVIN
PVIN
UVLO
PGOOD
RT
SYNC
EN/SS
COMP
BST
SW
SW
LD
VREG
PGND
GND
FB
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
ROSC
RTOP
RBOT
CSS
CIN
COUT
VOUT
CBST
CVREG
L
VIN
CC_EA
CCP_EA
RC_EA
FET
100
50
55
60
65
70
75
80
85
90
95
0
1
2
3
4
5
6
OUTPUT CURRENT (A)
VOUT = 3.3V
VOUT = 5V
VOUT = 1.2V
Rev. 0
Information furnished by Analog Devices is believed to be accurate and reliable. However, no
responsibilityisassumedbyAnalogDevicesforitsuse,norforanyinfringementsofpatentsorother
rightsofthirdpartiesthatmayresultfromitsuse.Specificationssubjecttochangewithoutnotice.No
license is granted by implication or otherwise under any patent or patent rights of Analog Devices.
Trademarksandregisteredtrademarksarethepropertyoftheirrespectiveowners.
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
©2012 Analog Devices, Inc. All rights reserved.


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