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MAX25277

更新时间： 2024-12-01 14:57:59
品牌 Logo 应用领域
亚德诺 - ADI 转换器
页数 文件大小 规格书
18页 1299K
描述
36V、2.5A、微型Buck转换器，3.5uA IQ

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中文翻译

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MAX25277 数据手册

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Click here for production status of specific part numbers.  
MAX20077/MAX25277  
36V, 2.5A Mini Buck Converters with 3.5μA I  
Q
General Description  
Benefits and Features  
● Synchronous DC-DC Converter with Integrated FETs  
The MAX20077/MAX25277 is a small, synchronous buck  
converter with integrated high-side and low-side switches.  
The device is designed to deliver up to 2.5A (2.0A for the  
MAX20077ATCC/VY+ variant) with 3.5V to 36V input volt-  
ages while using only 3.5µA quiescent current at no load.  
• MAX20077ATCA/VY+/B/D/E = 2.5A I  
• MAX20077ATCC/VY+ = 2.0A I  
• 3.5µA Quiescent Current in Standby Mode  
OUT  
OUT  
● Small Solution Size Saves Space  
• 20ns Minimum On-Time  
The device provides an accurate output voltage of ±2%  
in FPWM mode within the normal 6V to 18V operation  
input range. With 20ns minimum on-time capability, the  
converter is capable of large input-to-output conversion  
ratios. Voltage quality can be monitored by observing  
the PGOOD signal. The device can operate in dropout  
by running at 99% duty cycle, making it ideal for auto-  
motive and industrial applications. The device offers  
two fixed 5V and 3.3V output voltages. In addition, the  
device can be configured for 1V to 10V output voltages  
using an external resistor-divider. Frequency is internally  
fixed at 2.1MHz, which allows for small external compo-  
nents and reduced output ripple, and guarantees no AM  
interference. A 400kHz option is also offered to provide  
minimum switching losses and maximum efficiency. The  
device automatically enters skip mode at light loads with  
ultra-low 3.5µA quiescent current at no load. The device  
offers pin-enabled spread-spectrum-frequency modula-  
tion designed to minimize EMI-radiated emissions due to  
the modulation frequency.  
• 2.1MHz or 400kHz Operating Frequency  
• Programmable 1V to 10V Output  
Voltages, or Fixed 5V/3.3V Options Available  
• Fixed 3.5ms Internal Soft-Start  
• Fixed Output Voltage with ±2% Output Accuracy  
in FPWM Mode (5V/3.3V), or Externally Resistor  
Adjustable  
(1V to 10V) with ±1.5% FB Accuracy  
• Innovative Current-Mode-Control Architecture  
Minimizes Total Board Space and BOM Count  
● PGOOD Output and High-Voltage EN Input Simplify  
Power Sequencing  
● Protection Features and Operating Range Ideal for  
Automotive Applications  
• 3.5V to 36V Operating V Range  
IN  
• 40V Load-Dump Protection  
• 99% Duty-Cycle Operation with Low Dropout  
• -40°C to +125°C Automotive Temperature Range  
• AEC-Q100 Qualified  
The MAX20077/MAX25277 variants are available in a  
small (3mm x 3mm), 12-pin, side-wettable TDFN pack-  
age with an exposed pad, and requires very few external  
components.  
Simplified Block Diagram  
SPS SYNC  
HIGH-  
VOLTAGE  
LDO  
REF  
EN  
BST  
SUP  
BANDGAP  
OSC  
BIAS  
Applications  
CLK  
● Automotive  
● Industrial  
CURRENT SENSE  
+
SLOPE COMP  
SOFT-  
START  
LX  
LOGIC  
CONTROL  
● High-Voltage DC-DC Converters  
BIAS  
OUT  
FB  
PWM  
EAMP  
COMP  
FB  
PGND  
Ordering Information appears at end of data sheet.  
SW1  
VRESET  
MAX20077  
SW2  
PGOOD  
AGND  
19-100267; Rev 6; 6/19  
1234567...18

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