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MAX17631

更新时间： 2024-09-25 14:58:19
品牌 Logo 应用领域
亚德诺 - ADI DC-DC转换器
页数 文件大小 规格书
24页 1289K
描述
4.5V至36V、1.5A、高效、同步降压型DC-DC转换器

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中文翻译

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MAX17631 数据手册

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EVALUATION KIT AVAILABLE  
Click here for production status of specific part numbers.  
MAX17631  
4.5V to 36V, 1.5A, High-Efficiency,  
Synchronous Step-Down DC-DC Converter  
General Description  
Benefits and Features  
● Reduces External Components and Total Cost  
The MAX17631 is a high-efficiency, high-voltage, syn-  
chronous step-down DC-DC converter with integrated  
MOSFETs operating over an input-voltage range of 4.5V  
to 36V. It can deliver up to 1.5A current. The MAX17631  
is available in three variants, MAX17631A, MAX17631B  
and MAX17631C. The MAX17631A and MAX17631B  
are fixed 3.3V and fixed 5V output parts, respectively.  
The MAX17631C is an adjustable output voltage (from  
• No Schottky - Synchronous Operation  
• Internal Compensation Components  
• All-Ceramic Capacitors, Compact Layout  
● Reduces Number of DC-DC Regulators to Stock  
• Wide 4.5V to 36V Input  
• Adjustable Output Voltage Range from  
0.9V up to 90% of V  
IN  
0.9V up to 90% of V ) part. Built-in compensation across  
IN  
• Delivers Up to 1.5A Over the Temperature Range  
• 400kHz to 2.2MHz Adjustable Frequency with  
External Clock Synchronization  
the output-voltage range eliminates the need for external  
compensation components.  
The MAX17631 features peak-current-mode control  
architecture. The device can be operated in the forced  
pulse- width modulation (PWM), or pulse-frequency  
modulation (PFM), or discontinuous-conduction mode  
(DCM) to enable high efficiency under full-load and light-  
load conditions. The MAX17631 offers a low minimum on-  
time that allows high switching frequencies and a smaller  
solution size.  
• Available in a 16-Pin, 3mm x 3mm TQFN Package  
● Reduces Power Dissipation  
• Peak Efficiency of 95%  
• PFM and DCM Modes Enable Enhanced  
Light-Load Efficiency  
• Auxiliary Bootstrap Supply (EXTVCC) for  
Improved Efficiency  
• 2.8μA Shutdown Current  
The feedback-voltage regulation accuracy over -40°C to  
+125°C for the MAX17631A/MAX17631B/MAX17631C is  
±1.2%.The device is available in a 16-pin (3mm x 3mm)  
TQFN package. Simulation models are available.  
● Operates Reliably in Adverse Industrial Environments  
• Hiccup-Mode Overload Protection  
• Adjustable and Monotonic Startup with Prebiased  
Output Voltage  
• Built-In Output-Voltage Monitoring with RESET  
• Programmable EN/UVLO Threshold  
• Overtemperature Protection  
• High Industrial -40°C to +125°C Ambient Operating  
Temperature Range / -40°C to +150°C Junction  
Temperature Range  
Applications  
● Industrial Control Power Supplies  
● General-Purpose Point-of-Load  
● Distributed Supply Regulation  
● Base Station Power Supplies  
● Wall Transformer Regulation  
● High Voltage Single-Board Systems  
Ordering Information appears at end of data sheet.  
Typical Application Circuit  
V
IN  
6.5V TO 36V  
C1  
2.2µF  
EN/UVLO  
RT  
MODE/SYNC  
V
IN  
BST  
C5  
0.1µF  
L1  
V
OUT  
LX  
FB  
V
CC  
15µH  
C3  
2.2µF  
MAX17631B  
5V,1.5A  
C4  
22µF  
SGND  
f
: 400kHz  
SW  
SS  
EXTVCC  
PGND  
C2  
5600pF  
C1: 2.2µF/50V/X7R/1206 (C3216X7R1H225K160AE)  
L1: 15µH (XAL5050-153ME)  
C4: 22µF/25V/X7R/1210 (GRM32ER71E226ME15)  
EP  
RESET  
19-100462; Rev 0; 12/18  
1234567...24

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