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MAX17576

更新时间： 2024-11-16 02:52:43
品牌 Logo 应用领域
美信 - MAXIM /
页数 文件大小 规格书
22页 1025K
描述
4.5V to 60V, 4A, High-Efficiency Synchronous Step-Down DC-DC Converter with Internal Compensation

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MAX17576 数据手册

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EVALUATION KIT AVAILABLE  
Click here to ask about the production status of specific part numbers.  
MAX17576  
4.5V to 60V, 4A, High-Efficiency,  
Synchronous Step-Down DC-DC Converter  
with Internal Compensation  
General Description  
Benefits and Features  
● Reduces External Components and Total Cost  
The Himalaya series of voltage regulator ICs, power mod-  
ules, and chargers enable cooler, smaller, and simpler power  
supply solutions. The MAX17576, high-efficiency, high-  
voltage, Himalaya synchronous step-down DC-DC converter  
with integrated MOSFETs operates over an input voltage  
range of 4.5V to 60V. The converter can deliver up to 4A cur-  
rent. Output voltage is programmable from 0.9V up to 90%  
• No Schottky-Synchronous Operation  
• Internal Compensation for Any Output Voltage  
• All-Ceramic Capacitors, Compact Layout  
● Reduces Number of DC-DC Regulators to Stock  
• Wide 4.5V to 60V Input  
• Adjustable Output Voltage Range from 0.9V up to  
of V . The feedback voltage regulation accuracy over -40°C  
IN  
90% of V  
IN  
to +125°C is ±0.9%. Built-in compensation across the output-  
voltage range eliminates the need for external compensation  
components.  
• 100kHz to 2.2MHz Adjustable Switching Frequency  
with External Clock Synchronization  
● Reduces Power Dissipation  
• Peak Efficiency of 94.8%  
The MAX17576 features a peak-current-mode control  
architecture. The device can operate either in constant-  
frequency based pulse-width modulation (PWM) or pulse-  
frequency modulation (PFM), or discontinuous-conduction  
mode (DCM) control schemes. A programmable soft-start  
feature allows users to reduce input inrush current. The  
device also incorporates an output enable/undervoltage  
lockout pin (EN/UVLO) that allows the user to turn on the  
part at the desired input voltage level. The MAX17576  
offers a low minimum on time that allows high switching  
frequencies and a small solution size.  
• PFM and DCM Modes Enable Enhanced  
Light-Load Efficiency  
• Auxiliary Bootstrap Supply (EXTVCC) for Improved  
Efficiency  
• 2.8µA Shutdown Current  
● Operates Reliably in Adverse Industrial Environments  
• Hiccup Mode Overload Protection and Auto-Retry  
Startup  
• Adjustable Soft-Start and Prebiased Power-Up  
• Built-In Output-Voltage Monitoring with RESET  
• Programmable EN/UVLO Threshold  
• Monotonic Startup with Prebiased Output Voltage  
• Overtemperature Protection  
The MAX17576 is available in a 24-pin (4mm x 5mm)  
TQFN package. Simulation models are available.  
Applications  
• Wide -40°C to +125°C Ambient Operating Tempera-  
ture Range/-40°C to +150°C Junction Temperature  
Range  
● 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  
R3  
59kΩ  
(4.5V-60V)  
C1  
2 x 4.7μF  
EN/UVLO  
IN  
BST  
RT  
C5  
0.1μF  
L1  
5.6μH  
V
OUT  
3.3V, 4A  
MODE/SYNC  
LX  
V
CC  
C6  
2.2μF  
MAX17576  
C3  
2 x 47μF  
R6  
100kΩ  
CF  
SGND  
FB  
FB  
R7  
SS  
C8  
5600pF  
EXTVCC  
PGND  
37.4kΩ  
f
= 350kHz  
SW  
L = XAL6060-562ME  
C3 = GRM32ER71A476ME15  
RESET  
19-100399; Rev 1; 9/20  
1234567...22

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