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ADP2384

更新时间： 2024-11-23 12:26:15
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亚德诺 - ADI 稳压器
页数 文件大小 规格书
24页 650K
描述
20 V, 4 A, Synchronous, Step-Down DC-to-DC Regulator

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20 V, 4 A, Synchronous, Step-Down  
DC-to-DC Regulator  
Data Sheet  
ADP2384  
FEATURES  
TYPICAL APPLICATIONS CIRCUIT  
Input voltage: 4.5 V to 20 V  
Integrated MOSFET: 44 mΩ/11.6 mΩ  
Reference voltage: 0.6 V 1%  
ADP2384  
BST  
V
PVIN  
EN  
IN  
C
BST  
L
C
IN  
SW  
V
OUT  
Continuous output current: 4 A  
C
OUT  
PGOOD  
SYNC  
RT  
R
TOP  
Programmable switching frequency: 200 kHz to 1.4 MHz  
Synchronizes to external clock: 200 kHz to 1.4 MHz  
180° out-of-phase clock synchronization  
Precision enable and power good  
FB  
COMP  
SS  
R
T
R
C
R
VREG  
BOT  
C
C
VREG  
GND PGND  
C
C
External compensation  
SS  
Internal soft start with external adjustable option  
Startup into a precharged output  
Supported by ADIsimPower design tool  
Figure 1.  
APPLICATIONS  
100  
95  
90  
85  
80  
75  
70  
65  
60  
55  
50  
Communications infrastructure  
Networking and servers  
Industrial and instrumentation  
Healthcare and medical  
Intermediate power rail conversion  
DC-to-dc point-of-load applications  
V
V
V
= 1.2V  
= 3.3V  
= 5V  
OUT  
OUT  
OUT  
0
0.5  
1.0  
1.5  
2.0  
2.5  
3.0  
3.5  
4.0  
OUTPUT CURRENT (A)  
Figure 2. Efficiency vs. Output Current, VIN = 12 V, fSW = 300 kHz  
GENERAL DESCRIPTION  
The ADP2384 is a synchronous, step-down dc-to-dc regulator  
with an integrated 44 mΩ, high-side power MOSFET and  
an 11.6 mΩ, synchronous rectifier MOSFET to provide a high  
efficiency solution in a compact 4 mm × 4 mm LFCSP package.  
This device uses a peak current mode, constant frequency pulse-  
width modulation (PWM) control scheme for excellent stability  
and transient response. The switching frequency of the ADP2384  
can be programmed from 200 kHz to 1.4 MHz. To minimize  
system noise, the synchronization function allows the switching  
frequency to be synchronized to an external clock.  
4 A of continuous current. Each IC draws less than 120 μA current  
from the input source when it is disabled.  
This regulator targets high performance applications that require  
high efficiency and design flexibility. External compensation and an  
adjustable soft start function provide design flexibility. The power-  
good output and precision enable input provide simple and reliable  
power sequencing.  
Other key features include undervoltage lockout (UVLO),  
overvoltage protection (OVP), overcurrent protection (OCP),  
short-circuit protection (SCP), and thermal shutdown (TSD).  
The ADP2384 requires minimal external components and operates  
from an input voltage of 4.5 V to 20 V. The output voltage can be  
adjusted from 0.6 V to 90% of the input voltage and delivers up to  
The ADP2384 operates over the −40°C to +125°C junction  
temperature range and is available in a 24-lead, 4 mm × 4 mm  
LFCSP 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  
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.  
Trademarks and registeredtrademarks arethe 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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