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ADP2381AREZ-R7

更新时间: 2024-11-26 07:18:43
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亚德诺 - ADI /
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20 V, 6 A Synchronous Step-Down

ADP2381AREZ-R7 数据手册

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20 V, 6 A Synchronous Step-Down  
Regulator with Low-Side Driver  
Data Sheet  
ADP2381  
FEATURES  
TYPICAL APPLICATIONS CIRCUIT  
V
Input voltage: 4.5 V to 20 V  
IN  
1
2
3
4
5
6
7
8
16  
15  
14  
13  
12  
PVIN  
PVIN  
BST  
L
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  
C
V
BST  
OUT  
C
IN  
SW  
SW  
C
OUT  
UVLO ADP2381  
PGOOD  
FET  
LD  
C
RT  
VREG  
PGND  
GND  
VREG  
R
OSC  
11  
10  
9
SYNC  
EN/SS  
COMP  
R
R
TOP  
C
SS  
FB  
Power-good output  
BOT  
External compensation  
C
C_EA  
R
C_EA  
Internal soft start with external adjustable option  
Startup into a precharged output  
Supported by ADIsimPower design tool  
C
CP_EA  
Figure 1.  
APPLICATIONS  
100  
95  
90  
85  
80  
75  
70  
65  
60  
55  
50  
Communication infrastructure  
Networking and servers  
Industrial and instrumentation  
Healthcare and medical  
Intermediate power rail conversion  
DC-to-dc point of load application  
V
V
V
= 3.3V  
= 5V  
= 1.2V  
OUT  
OUT  
OUT  
0
1
2
3
4
5
6
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  
responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other  
rightsof third parties that may result fromits 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 andregisteredtrademarks 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  
Fax: 781.461.3113  
www.analog.com  
©2012 Analog Devices, Inc. All rights reserved.  
 
 
 
 

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