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ADP2390ACPZ-R7

更新时间： 2024-11-10 01:05:55
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亚德诺 - ADI /
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18 V, 12 A Step-Down Regulator with Programmable Current Limit

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18 V, 12 A Step-Down Regulator with  
Programmable Current Limit  
Data Sheet  
ADP2389/ADP2390  
FEATURES  
TYPICAL APPLICATIONS CIRCUIT  
Input voltage: 4.5 V to 18 V  
Continuous output current: 12 A  
Integrated MOSFETs: 17 mΩ high-side/4.5 mΩ low-side  
0.6 V 0.5% reference voltage  
Programmable switching frequency range: 200 kHz to 2200 kHz  
Enhanced transient response  
VIN  
PVIN  
EN  
BST  
V
C
IN  
BST  
C
IN  
V
SW  
OUT  
L
PGOOD  
C
OUT  
ADP2389/  
ADP2390  
R
R
TOP  
BOT  
FTW  
FB  
COMP  
SS  
ILIM  
RT  
Programmable current limit with 10% accuracy  
Precision enable and power good  
VREG  
R
C
R
R
R
T
FTW  
ILIM  
GND PGND  
External compensation and soft start  
PFM mode (ADP2390 only)  
C
C
C
C
VREG  
SS  
Start up into a precharged output  
Supported by the ADIsimPower design tool  
Figure 1.  
APPLICATIONS  
Communication infrastructure  
Networking and servers  
Industrial and instrumentation  
Healthcare and medical  
Intermediate power rail conversions  
DC-to-DC point of load applications  
GENERAL DESCRIPTION  
The ADP2389/ADP2390 are current mode control, synchronous  
step-down, dc-to-dc regulators. They integrate a 17 mΩ high-side  
power MOSFET and a 4.5 mΩ synchronous rectifier MOSFET to  
provide a high efficiency solution. The ADP2390 operates in pulse  
frequency modulation (PFM) mode to improve the system  
efficiency at light load. The ADP2389/ADP2390 run from an  
input voltage of 4.5 V to 18 V and can deliver up to 12 A of output  
current. The output voltage can be adjusted to 0.6 V and the  
switching frequency can be programmed between 200 kHz to  
2200 kHz.  
The ADP2389/ADP2390 operates over a −40°C to +125°C  
junction temperature range and is available in 32-lead, 5 mm ×  
5 mm LFCSP package.  
100  
95  
90  
85  
80  
75  
70  
The ADP2389/ADP2390 target high performance applications  
that require high efficiency and design flexibility. External  
compensation and soft start provide design flexibility. The power-  
good output and precision enable input provide simple and reliable  
power sequencing. An enhanced transient response feature  
improves the load transient performance, which reduces the  
output capacitance. Programmable current limit allows the user  
to optimized the inductor design and provide a compact solution.  
V
V
V
V
= 1.2V  
= 1.8V  
= 3.3V  
= 5.0V  
OUT  
OUT  
OUT  
OUT  
65  
60  
0
1
2
3
4
5
6
7
8
9
10 11 12  
OUTPUT CURRENT (A)  
Figure 2. ADP2389 Efficiency vs. Output Current, VIN = 12 V, fSW = 300 kHz  
Other key features include undervoltage lockout (UVLO),  
overvoltage protection (OVP), overcurrent protection (OCP),  
and thermal shutdown (TSD).  
Rev. 0  
Document Feedback  
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  
Technical Support  
©2015 Analog Devices, Inc. All rights reserved.  
www.analog.com  
 
 
 
 
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