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MAX17232ETIR+ PDF预览

MAX17232ETIR+

更新时间: 2024-11-21 01:04:43
品牌 Logo 应用领域
美信 - MAXIM /
页数 文件大小 规格书
24页 1494K
描述
Eliminates External Components and Reduces Total Cost

MAX17232ETIR+ 数据手册

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EVALUATION KIT AVAILABLE  
MAX17232/MAX17233  
3.5V–36V, 2.2MHz, Synchronous Dual Buck  
Controller with 20µA Quiescent Current  
General Description  
Benefits and Features  
Eliminates External Components and Reduces Total Cost  
•ꢀ No Schottky-Synchronous Operation for High  
EfficiencyꢀandꢀReducedꢀCost  
The MAX17232/MAX17233 offers dual synchronous step-  
down DC-DC controllers with integrated MOSFETs. They  
operates over a 3.5V to 36V input voltage range with 42V  
input transient protection, and 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  
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  
These devices use a current-mode-control architecture.  
The devices can be operated in 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.  
•ꢀ Frequency Synchronization Input  
Reduces Power Dissipation  
•ꢀ 92%ꢀPeakꢀEfficiency  
•ꢀ 8μAꢀ(typ)ꢀinꢀShutdown  
•ꢀ 20μAꢀ(typ)ꢀQuiescentꢀCurrentꢀinꢀPFMꢀMode  
The devices are available in a 28-pin TQFN-EP package  
with exposed pad, and are specified for operation over  
-40°C to +85°C.  
Operates Reliably  
•ꢀ 42V Input Voltage Transient Protection  
•ꢀ Cycle-by-Cycle Current Limit, Thermal Shutdown  
•ꢀ Supply Overvoltage and Undervoltage Lockout  
•ꢀ Power-OK Monitor  
Applications  
Distributed Supply Regulation  
Wall Transformer Regulation  
General-Purpose Point-of-Load  
•ꢀ Reduced EMI Emission with Spread-Spectrum Control  
•ꢀ 50ns (typ) Minimum On-Time Guarantees PWM  
Operation at Low Duty Cycle at 2.2MHz  
Ordering Information and Selector Guide appears at end of  
data sheet.  
19-8366; Rev 0; 2/16  

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