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MAX17531

更新时间： 2024-09-27 14:57:47
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
21页 1425K
描述
4V至42V、50mA、超小、高效、同步降压型DC-DC转换器，空载耗流仅为22μA

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中文翻译

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MAX17531 数据手册

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MAX17531  
4V to 42V, 50mA, Ultra-Small, High-Efficiency,  
Synchronous Step-Down DC-DC Converter  
with 22µA No-Load Supply Current  
General Description  
Benefits and Features  
● Reduces External Components and Total Cost  
The  
MAX17531  
high-efficiency,  
high-voltage,  
synchronous step-down DC-DC converter with integrated  
MOSFETs operates over a 4V to 42V input. The converter  
can deliver up to 50mA and generates output voltages  
• No Schottky–Synchronous  
• Internal Compensation for Any Output Voltage  
• Built-In Soft-Start  
• All-Ceramic Capacitors, Compact Layout  
from 0.8V up to 0.9 x V . The feedback (FB) voltage is  
IN  
accurate to within ±1.75% over -40°C to +125°C.  
● Reduces Number of DC-DC Regulators to Stock  
The MAX17531 uses peak-current-mode control and can  
be operated in pulse-width modulation (PWM) or pulse-  
frequency modulation (PFM) modes.  
• Wide 4V to 42V Input  
• Adjustable 0.8V up to 0.9 x V Output  
• 100kHz to 2.2MHz Adjustable Switching Frequency  
with External Synchronization  
IN  
The device is available in 10-pin (3mm x 2mm) TDFN  
®
and 10-pin (3mm x 3mm) μMAX packages. Simulation  
● Reduces Power Dissipation  
• 22µA Quiescent Current  
models are available.  
• Peak Efficiency > 90%  
• PFM Enables Enhanced Light-Load Efficiency  
• 1.2µA Shutdown Current  
Applications  
● Industrial Sensors and Process Control  
● High-Voltage LDO Replacement  
● Battery-Powered Equipment  
● Operates Reliably in Adverse Environments  
• Peak Current Limit Protection  
● HVAC and Building Control  
• Built-In Output Voltage Monitoring RESET  
• Programmable EN/UVLO Threshold  
• Monotonic Startup into Prebiased Load  
• Overtemperature Protection  
• High Industrial -40°C to +125°C Ambient Operating  
Temperature Range / -40°C to +150°C Junction  
Temperature Range  
µMAX is a registered trademark of Maxim Integrated Products, Inc.  
Ordering Information appears at end of data sheet.  
Typical Application Circuit—High-Efficiency 5V, 50mA Regulator  
L1  
330  
V
V
OUT  
5V  
IN  
µ
H
6V TO 42V  
IN  
LX  
MAX17531  
C
10µF  
OUT  
C
IN  
F
1
µ
EN/UVLO  
SS  
GND  
R4  
22.1  
Ω
V
OUT  
FB  
C1  
0.22  
R1  
261k  
µ
F
MODE  
Ω
RT/SYNC  
R2  
49.9k  
SWITCHING FREQUENCY = 300kHz  
L1: COILCRAFT LPS5030-334M  
Ω
R3  
140k  
C
: MURATA 10µF/X7R/6.3V/0805 (GRM21BR70J106K)  
Ω
OUT  
C : MURATA 1μF/X7R/50V/0805 (GRM21BR71H105K)  
IN  
RESET  
19-7423; Rev 2; 8/17  
1234567...21

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