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ADP2442ACPZ-R7 PDF预览

ADP2442ACPZ-R7

更新时间： 2024-11-26 14:47:39
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亚德诺 - ADI 开关输出元件
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37页 1641K
描述
36 V,1 A, Synchronous, Step-Down, DC-to-DC Regulator with External Clock Synchronization

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ADP2442ACPZ-R7 数据手册

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36 V,1 A, Synchronous, Step-Down, DC-to-DC  
Regulator with External Clock Synchronization  
Data Sheet  
ADP2442  
FEATURES  
TYPICAL CIRCUIT CONFIGURATION  
C2  
Wide input voltage range from 4.5 V to 36 V  
Low minimum on time of 50 ns typical  
Maximum load current of 1 A  
C1  
V
OUT  
C
BOOST  
High efficiency of up to 94%  
Adjustable output down to 0.6 V  
1% output voltage accuracy  
R
R
TOP  
V
IN  
FB  
VIN  
SW  
ADP2442  
BOTTOM  
V
OUT  
COMP  
Adjustable switching frequency from 300 kHz to 1 MHz  
External synchronization from 300 kHz to 1 MHz  
Pulse skip mode or forced fixed frequency mode  
Precision enable input pin (EN)  
C
C
OUT  
R
IN  
COMP  
PGND  
EN  
C
COMP  
Open-drain power good  
R
FREQ  
Internal soft start  
Overcurrent-limit protection  
Shutdown current of less than 15 μA  
UVLO and thermal shutdown  
Figure 1.  
The ADP2442 offers the flexibility of external clock  
synchronization. The switching frequency can be synchronized to  
an external clock, applied to the SYNC/MODE pin. The ADP2442  
can also be configured to operate in the forced fixed frequency  
mode for low EMI or power saving mode to reduce the switching  
losses at light load.  
12-lead, 3 mm × 3 mm LFCSP package  
Supported by the ADIsimPower™ tool set  
Reference similar product ADP2441 with programmable soft  
start and tracking  
APPLICATIONS  
The ADP2442 uses hiccup mode to protect the IC from short  
circuits or from overcurrent conditions on the output. The internal  
soft start limits inrush current during startup for a wide variety of  
load capacitances. Other key features include input undervoltage  
lockout (UVLO), thermal shutdown (TSD), and precision enable  
(EN), which can also be used as a logic level shutdown input.  
Point of load applications  
Distributed power systems  
Industrial control supplies  
Standard rail conversion to 24 V/12 V/5 V/3.3 V  
GENERAL DESCRIPTION  
The ADP2442 is a constant frequency, current mode control,  
synchronous, step-down, dc-to-dc regulator that is capable of  
driving loads of up to 1 A with excellent line and load regulation  
characteristics. The ADP2442 operates with a wide input voltage  
range from 4.5 V to 36 V, which makes it ideal for regulating  
power from a wide variety of sources. In addition, the ADP2442  
has very low minimum on time (50 ns) and is, therefore, suitable  
for applications requiring a very high step-down ratio.  
The ADP2442 is available in a 3 mm × 3 mm, 12-lead LFCSP  
package and is rated for a junction temperature range from  
−40°C to +125°C.  
100  
90  
80  
70  
60  
50  
40  
30  
20  
10  
0
V
= 12V  
OUT  
V
= 5V  
OUT  
The output voltage can be adjusted from 0.6 V to 0.9 × VIN. High  
efficiency is obtained with integrated low resistance N-channel  
MOSFETs for both high-side and low-side devices.  
V
= 3.3V  
OUT  
The switching frequency is adjustable from 300 kHz to 1 MHz with  
an external resistor. The ADP2442 also has an accurate power-good  
(PGOOD) open-drain output signal.  
V
= 24V  
IN  
PWM = 300kHz  
0.01  
0.1  
LOAD (A)  
1
Figure 2. Efficiency vs. Load Current, VIN = 24 V  
Rev. B  
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  
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 ©2012–2015 Analog Devices, Inc. All rights reserved.  
Technical Support  
www.analog.com  
 
 
 
 
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ADP2442ACPZ-R7 替代型号

型号 品牌 替代类型 描述 数据表
ADP2441ACPZ-R7 ADI

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 36 V,1 A, Synchronous, Step-Down DC-to-DC Regulator
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