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MBRS240LT3

更新时间： 2024-09-25 12:49:59
品牌 Logo 应用领域
亚德诺 - ADI 稳压器二极管光电二极管
页数 文件大小 规格书
28页 690K
描述
1.2 A, 20 V, 700 kHz/1.4 MHz, Nonsynchronous Step-Down Regulator

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1.2 A, 20 V, 700 kHz/1.4 MHz,  
Nonsynchronous Step-Down Regulator  
ADP2300/ADP2301  
TYPICAL APPLICATIONS CIRCUIT  
FEATURES  
1.2 A maximum load current  
BST  
3.0V TO 20V  
VIN  
EN  
2ꢀ output accuracy over temperature range  
Wide input voltage range: 3.0 V to 20 V  
700 kHz (ADP2300) or 1.4 MHz (ADP2301)  
switching frequency options  
V
OUT  
ADP2300/  
ADP2301  
SW  
FB  
ON  
High efficiency up to 91ꢀ  
GND  
OFF  
Current-mode control architecture  
Output voltage from 0.8 V to 0.85 × VIN  
Automatic PFM/PWM mode switching  
Precision enable pin with hysteresis  
Integrated high-side MOSFET  
Integrated bootstrap diode  
Internal compensation and soft start  
Minimum external components  
Figure 1.  
100  
95  
90  
85  
80  
75  
70  
65  
fSW = 1.4MHz  
fSW = 700kHz  
Undervoltage lockout (UVLO)  
Overcurrent protection (OCP) and thermal shutdown (TSD)  
ADIsimPower™ online design tool  
Available in ultrasmall, 6-lead TSOT package  
APPLICATIONS  
LDO replacement for digital load applications  
Intermediate power rail conversion  
Communications and networking  
Industrial and instrumentation  
Healthcare and medical  
V
V
= 12V  
OUT  
IN  
= 5.0V  
60  
0
0.2  
0.4  
0.6  
(A)  
0.8  
1.0  
1.2  
I
OUT  
Figure 2. Efficiency vs. Output Current  
Consumer  
GENERAL DESCRIPTION  
The ADP2300/ADP2301 are compact, constant-frequency,  
current-mode, step-down dc-to-dc regulators with integrated  
power MOSFET. The ADP2300/ADP2301 devices run from  
input voltages of 3.0 V to 20 V, making them suitable for a wide  
range of applications. A precise, low voltage internal reference  
makes these devices ideal for generating a regulated output  
voltage as low as 0.8 V, with 2% accuracy, for up to 1.2 A load  
current.  
total solution size. Current-mode control provides fast and stable  
line and load transient performance. The ADP2300/ADP2301  
devices include internal soft start to prevent inrush current at  
power-up. Other key safety features include short-circuit protec-  
tion, thermal shutdown (TSD), and input undervoltage lockout  
(UVLO). The precision enable pin threshold voltage allows the  
ADP2300/ADP2301 to be easily sequenced from other input/  
output supplies. It can also be used as a programmable UVLO  
input by using a resistive divider.  
There are two frequency options: the ADP2300 runs at 700 kHz,  
and the ADP2301 runs at 1.4 MHz. These options allow users to  
make decisions based on the trade-off between efficiency and  
The ADP2300/ADP2301 are available in a 6-lead TSOT package  
and are rated for the −40°C to +125°C junction temperature range.  
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  
©2010 Analog Devices, Inc. All rights reserved.  
 
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