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PDF ADP2381 Data sheet ( Hoja de datos )
| Número de pieza | ADP2381 | |
| Descripción | 6 A Synchronous Step-Down Regulator | |
| Fabricantes | Analog Devices | |
| Logotipo |  |
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Data Sheet
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
20 V, 6 A Synchronous Step-Down
Regulator with Low-Side Driver
ADP2381
TYPICAL APPLICATIONS CIRCUIT
VIN
CIN
1 PVIN
2
PVIN
BST
SW
16
15
CBST
L
3 14
UVLO ADP2381 SW
4 PGOOD
LD 13
FET
5 RT
ROSC 6 SYNC
VREG 12 CVREG
PGND 11
7
EN/SS
10
GND
CSS
8
COMP
9
FB
CC_EA
RC_EA
VOUT
COUT
RTOP
RBOT
CCP_EA
Figure 1.
100
95
90
85
80
75
70
65
60 VOUT = 3.3V
55
VOUT = 5V
VOUT = 1.2V
50
0123456
OUTPUT CURRENT (A)
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.
Rev. 0
Information furnished by Analog Devices is believed to be accurate and reliable. However, no
responsibilityisassumedbyAnalogDevices for itsuse,nor foranyinfringementsofpatentsor 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.
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.
Free Datasheet http://www.Datasheet4U.com
1 page  
Data Sheet
ABSOLUTE MAXIMUM RATINGS
Table 2.
Parameter
PVIN, PGOOD
SW
BST
UVLO, FB, EN/SS, COMP, SYNC, RT
VREG, LD
PGND to GND
Operating Junction Temperature Range
Storage Temperature Range
Soldering Conditions
Rating
−0.3 V to +22 V
−1 V to +22 V
VSW + 6 V
−0.3 V to +6 V
−0.3 V to +12 V
−0.3 V to +0.3 V
−40°C to +125°C
−65°C to +150°C
JEDEC J-STD-020
Stresses above those listed under Absolute Maximum Ratings
may cause permanent damage to the device. This is a stress
rating only; functional operation of the device at these or any
other conditions above those indicated in the operational
section of this specification is not implied. Exposure to absolute
maximum rating conditions for extended periods may affect
device reliability.
ADP2381
Absolute maximum ratings apply individually only, not in
combination. Unless otherwise specified, all other voltages are
referenced to GND.
THERMAL INFORMATION
Table 3. Thermal Resistance
Package Type
16-lead TSSOP_EP
θJA
39.48
Unit
°C/W
θJA is specified for the worst-case conditions, that is, a device
soldered in circuit board (4-layer, JEDEC standard board) for
surface-mount packages.
ESD CAUTION
Rev. 0 | Page 5 of 28
Free Datasheet http://www.Datasheet4U.com
5 Page 
Data Sheet
7
6
5
4
3
2 VOUT = 1.2V
VOUT = 1.8V
1
VOUT = 2.5V
VOUT = 3.3V
VOUT = 5V
0
25 40 55 70 85
AMBIENT TEMPERATURE (°C)
100
Figure 28. Load Current vs. Ambient Temperature, VIN = 12 V,
fSW = 500 kHz
ADP2381
7
6
5
4
3
2
VOUT = 1V
VOUT = 1.2V
VOUT = 1.8V
1
VOUT = 2.5V
VOUT = 3.3V
VOUT = 5V
0
25 40 55 70 85 100
AMBIENT TEMPERATURE (°C)
Figure 29. Load Current vs. Ambient Temperature, VIN = 12 V,
fSW = 250 kHz
Rev. 0 | Page 11 of 28
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11 Page | ||
| Páginas | Total 28 Páginas | |
| PDF Descargar | [ Datasheet ADP2381.PDF ] | |
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