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ADP2443

更新时间： 2024-11-27 01:19:07
品牌 Logo 应用领域
亚德诺 - ADI /
页数 文件大小 规格书
25页 802K
描述
Process control and industrial automation

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ADP2443 数据手册

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3 A, 36 V, Synchronous Step-Down  
DC-to-DC Regulator  
ADP2443  
Data Sheet  
FEATURES  
TYPICAL APPLICATION CIRCUIT  
Continuous output current: 3 A  
ADP2443  
Input voltage: 4.5 V to 36 V  
Integrated MOSFETs: 98 mΩ/35 mΩ  
Reference voltage: 0.6 V 1%  
V
PVIN  
EN  
BST  
SW  
IN  
C
L
BST  
V
C
OUT  
IN  
C
R
R
OUT  
RAMP  
TOP  
RAMP  
Fast minimum on time: 50 ns  
PGOOD  
FB  
Programmable switching frequency: 200 kHz to 1.8 MHz  
Synchronizes to external clock: 200 kHz to 1.8 MHz  
Precision enable and power good  
Cycle-by-cycle current limit with hiccup protection  
External compensation  
RT/SYNC COMP  
R
R
C
R
VREG  
SS  
T
BOT  
C
C
C
VREG  
SS  
C
GND  
PGND  
Programmable soft start time  
Startup into a precharged output  
Supported by ADIsimPower design tool  
Figure 1.  
APPLICATIONS  
Intermediate power rail conversion  
Multicell battery powered systems  
Process control and industrial automation  
Healthcare and medical  
Networking and servers  
GENERAL DESCRIPTION  
The ADP2443 is synchronous step-down, dc-to-dc regulator  
with an integrated 98 mΩ, high-side power metal oxide semicon-  
ductor field effect transistor (MOSFET) and a 35 mΩ, synchronous  
rectifier MOSFET to provide a high efficiency solution in a  
compact 4 mm × 4 mm LFCSP package. The regulators operate  
from an input voltage range of 4.5 V to 36 V. The output voltage  
can be adjusted down to 0.6 V and deliver up to 3 A of  
continuous current. The fast 50 ns minimum on time allows the  
regulators convert high input voltage to low output voltage at high  
frequency.  
Other key features include undervoltage lockout (UVLO),  
overvoltage protection (OVP), overcurrent protection (OCP),  
short-circuit protection (SCP), and thermal shutdown (TSD).  
The ADP2443 operates over the −40°C to +125°C operating  
junction temperature range and is available in a 24-lead, 4 mm ×  
4 mm LFCSP package.  
100  
95  
90  
85  
80  
75  
70  
The ADP2443 uses an emulated current mode, constant frequency  
pulse-width modulation (PWM) control scheme for excellent  
stability and transient response. The switching frequency of the  
ADP2443 can be programmed from 200 kHz to 1.8 MHz. The  
synchronization function allows the switching frequency be syn-  
chronized with an external clock to minimize the system noise.  
V
V
= 5V  
= 3.3V  
OUT  
OUT  
65  
60  
55  
50  
The ADP2443 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.  
0
0.5  
1.0  
1.5  
2.0  
2.5  
3.0  
OUTPUT CURRENT (A)  
Figure 2. Efficiency vs. Output Current, VIN = 24 V, fSW = 300 kHz  
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  
©2016 Analog Devices, Inc. All rights reserved.  
www.analog.com  
 
 
 
 
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