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MAX17231ETLW/T+

更新时间： 2024-09-19 05:43:39
品牌 Logo 应用领域
美信 - MAXIM 开关
页数 文件大小 规格书
29页 2008K
描述
Dual Switching Controller,

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中文翻译

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MAX17231ETLW/T+ 技术参数

是否Rohs认证： 符合生命周期：Active
Reach Compliance Code：compliantECCN代码：EAR99
HTS代码：8542.39.00.01风险等级：5.75
模拟集成电路 - 其他类型：DUAL SWITCHING CONTROLLER峰值回流温度（摄氏度）：NOT SPECIFIED
处于峰值回流温度下的最长时间：NOT SPECIFIEDBase Number Matches：1

MAX17231ETLW/T+ 数据手册

 浏览型号MAX17231ETLW/T+的Datasheet PDF文件第2页浏览型号MAX17231ETLW/T+的Datasheet PDF文件第3页浏览型号MAX17231ETLW/T+的Datasheet PDF文件第4页浏览型号MAX17231ETLW/T+的Datasheet PDF文件第5页浏览型号MAX17231ETLW/T+的Datasheet PDF文件第6页浏览型号MAX17231ETLW/T+的Datasheet PDF文件第7页 
MAX17230/MAX17231  
2V–36V, Synchronous Dual Buck Controller with  
Integrated Boost and 20µA Quiescent Current  
General Description  
Benefits and Features  
● Eliminates External Components and Reduces Total Cost  
• No Schottky-Synchronous Operation for High  
EfficiencyꢀandꢀReducedꢀCost  
The MAX17230/MAX17231 offers dual synchronous step-  
down DC-DC controllers with integrated MOSFETs and a  
step-up/boost controller. They operate over a 3.5V to 36V  
input voltage range, and down to 2V with the boost controller  
active. The devices can operate in dropout condition by  
running at 95% duty cycle. The controllers can generate  
fixed output voltages of 3.3V/5V, along with the capability  
to program the output voltage between 1V to 10V.  
• Simple External RC compensation for Stable  
Operation at Any Output Voltage  
• All-Ceramic Capacitor Solution: Ultra-Compact  
Layout  
• 180° Out-of-Phase Operation Reduces Output  
Ripple and Enables Cascaded Power Supplies  
These devices use current-mode-control architecture  
and can be operated in the pulse-width modulation  
(PWM) or pulse-frequency modulation (PFM) control  
schemes. PWM operation provides constant frequency  
operation at all loads and is useful in applications  
sensitive to switching frequency. PFM operation disables  
negative inductor current and additionally skips pulses at  
light loads for high-efficiency. The low-resistance, on-chip  
MOSFETs ensure high efficiency at full load and simplify  
the layout.  
● Reduces Number of DC-DC Controllers to Stock  
• Fixed Output Voltage with ±1% Accuracy (5V/3.3V)  
or Externally Resistor Adjustable (1V to 10V)  
• 220kHz to 2.2MHz Adjustable Frequency with  
External Synchronization  
• Frequency Synchronization Input  
● Reduces Power Dissipation  
• 92%ꢀPeakꢀEfficiency  
• 8μAꢀ(typ)ꢀinꢀShutdown  
• 20μAꢀ(typ)ꢀQuiescentꢀCurrentꢀinꢀPFMꢀMode  
The MAX17230/MAX17231 include a boost controller.  
This boost circuitry turns on during low input voltage  
conditions. It is designed to power step-down controller  
channels with input voltages as low as 2V.  
● Operates Reliably  
• 42V Input Voltage Transient Protection  
• Cycle-by-Cycle Current Limit, Thermal Shutdown  
• Supply Overvoltage and Undervoltage Lockout  
• Power-OK Monitor  
• Reduced EMI Emission with Spread-Spectrum Control  
• 50ns Minimum On-Time Guarantees PWM  
Operation at Low Duty Cycle at 2.2MHz  
These devices are available in a 40-pin TQFN package  
with exposed pad, and are specified for operation over  
-40°C to +85°C.  
Applications  
● Distributed Supply Regulation  
● Wall Transformer Regulation  
● General-Purpose Point-of-Load  
Ordering Information and Selector Guide appear at end of  
data sheet.  
19-8313; Rev 0; 2/16  
1234567...29

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