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ADP2118ACPZ-R2

更新时间： 2024-11-25 21:22:11
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亚德诺 - ADI 开关输出元件
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24页 1296K
描述
3 A, 1.2 MHz/600 kHz High Efficiency Synchronous Step-Down DC-to-DC Regulator

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ADP2118ACPZ-R2 数据手册

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3 A, 1.2 MHz/600 kHz High Efficiency  
Synchronous Step-Down DC-to-DC Regulator  
Data Sheet  
ADP2118  
FEATURES  
GENERAL DESCRIPTION  
3 A continuous output current  
75 mΩ and 40 mΩ integrated FET  
1.5% output accuracy  
Input voltage range from 2.3 V to 5.5 V  
Output voltage from 0.6 V to VIN  
600 kHz or 1.2 MHz fixed switching frequency  
Synchronizable between 600 kHz and 1.4 MHz  
Selectable synchronize phase shift: 0o or 180o  
Selectable PWM or PFM mode operation  
Current mode architecture  
The ADP2118 is a low quiescent current, synchronous, step-down,  
dc-to-dc regulator in a compact 4mm × 4mm LFCSP package. It  
uses a current mode, constant frequency pulse-width modulation  
(PWM) control scheme for excellent stability and transient  
response. Under light loads, the ADP2118 can be configured to  
operate in pulse frequency modulation (PFM) mode that  
reduces switching frequency to save power.  
The ADP2118 runs from input voltages of 2.3 V to 5.5 V. The  
output voltage of the ADP2118ACPZ-R7 is adjustable from  
0.6 V to input voltage (VIN), and the ADP2118ACPZ-x.x-R7 are  
available in preset output voltage options of 3.3 V, 2.5 V, 1.8 V,  
1.5 V, 1.2 V, and 1.0 V. The ADP2118 requires minimal external  
parts and provides a high efficiency solution with its integrated  
power switch, synchronous rectifier, and internal compensation.  
The IC draws less than 3 µA from the input source when it is  
disabled. Other key features include undervoltage lockout  
(UVLO), integrated soft start to limit inrush current at startup,  
overvoltage protection (OVP), overcurrent protection (OCP),  
and thermal shutdown (TSD).  
Precision enable input  
Power good output  
Voltage tracking input  
Integrated soft start  
Internal compensation  
Starts up into a precharged output  
UVLO, O V P, O C P, and thermal shutdown  
Available in 16-lead 4mm × 4mm LFCSP package  
Supported by ADIsimPower™ design tool  
APPLICATIONS  
Point of load conversion  
Communications and networking equipments  
Industrial and instrumentation  
Consumer electronics  
Medical appliances  
C1  
0.1µF  
R1  
10Ω  
V
IN  
5V  
R2  
100  
90  
80  
70  
60  
50  
40  
30  
20  
10  
0
C
IN  
10kΩ  
100µF  
X5R,  
6.3V  
16  
15  
14  
13  
PFM OPERATION  
L
1µH  
1
2
3
4
12  
11  
10  
9
SYNC/MODE  
FREQ  
PVIN  
SW  
V
3.3V  
3A  
OUT  
C
ADP2118  
OUT  
100µF  
X5R,  
6.3V  
TRK  
FB  
SW  
FPWM OPERATION  
SW  
5
6
7
8
V
V
= 5V  
fSO=UT1.2MHz  
IN  
= 3.3V  
R
R
BOT  
TOP  
2.21kΩ 10kΩ  
0.01  
0.1  
1
10  
OUTPUT CURRENT (A)  
Figure 2. Efficiency vs. Output Current  
Figure 1. Typical Applications Circuit  
Rev. D  
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 ©2009–2017 Analog Devices, Inc. All rights reserved.  
Technical Support  
www.analog.com  
 
 
 
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ADP2118ACPZ-R2 替代型号

型号 品牌 替代类型 描述 数据表
ADP2118ACPZ-R7 ADI

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 3 A, 1.2 MHz/600 kHz High Efficiency Synchronous Step-Down DC-to-DC Converter

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