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MAX797HESE

Manufacturer: MAX, MAXIM

High-Voltage, Step-Down Controller with Synchronous Rectifier for CPU Power

Partnumber Manufacturer Quantity Availability
MAX797HESE MAX, MAXIM 2231 In Stock

Description and Introduction

High-Voltage, Step-Down Controller with Synchronous Rectifier for CPU Power The MAX797HESE is a high-efficiency, step-down DC-DC converter manufactured by Maxim Integrated. Below are the factual specifications, descriptions, and features from Ic-phoenix technical data files:

### **Specifications:**  
- **Manufacturer:** Maxim Integrated  
- **Type:** Step-Down DC-DC Converter  
- **Package:** 16-pin QSOP (Exposed Pad)  
- **Input Voltage Range:** 4.5V to 30V  
- **Output Voltage Range:** Adjustable (down to 1.25V)  
- **Output Current:** Up to 7A  
- **Switching Frequency:** 300kHz  
- **Efficiency:** Up to 95%  
- **Operating Temperature Range:** -40°C to +85°C  

### **Descriptions:**  
The MAX797HESE is a synchronous buck (step-down) DC-DC converter designed for high-efficiency power conversion in applications requiring high current output. It integrates power MOSFETs and features a fixed-frequency PWM control scheme for stable operation.  

### **Features:**  
- **High Efficiency:** Up to 95% efficiency with synchronous rectification.  
- **Wide Input Voltage Range:** Supports 4.5V to 30V input.  
- **Adjustable Output Voltage:** Configurable down to 1.25V.  
- **High Output Current:** Capable of delivering up to 7A.  
- **Fixed-Frequency Operation:** 300kHz switching frequency for reduced noise.  
- **Integrated Power MOSFETs:** Simplifies external component requirements.  
- **Thermal Protection:** Includes over-temperature shutdown.  
- **Soft-Start Function:** Prevents inrush current at startup.  
- **Low Dropout Operation:** Maintains regulation even with small input-output differentials.  

This information is strictly based on the manufacturer's datasheet and technical documentation.

Application Scenarios & Design Considerations

High-Voltage, Step-Down Controller with Synchronous Rectifier for CPU Power

Alternative Part Number

  • LTC1871EMS --: Current-mode boost/flyback controller with similar wide input range and gate drive, suitable replacement for step-up/inverting converter designs.
  • UC3843AN --: Industry-standard current-mode PWM controller with comparable drive capability and compensation, widely available and cost-effective.
  • SG3524N --: Classic PWM regulator/controller with dual outputs and wide input range, usable in similar DC-DC converter topologies.
  • LT1072CN8 --: High-efficiency switching regulator controller with similar boost/inverting capability and wide input range, suitable as a functional substitute in many designs.
  • MC34063ACN --: Versatile DC-DC converter controller supporting boost, buck, and inverting topologies, commonly used as a lower-cost alternative for similar power supply roles.
  • LM2577N-ADJ --: Adjustable step-up switching regulator with comparable voltage and current handling, usable as a drop-in style alternative for boost applications.
  • LM3478MM --: Low-side N-channel MOSFET boost/flyback controller with comparable input voltage range and switching control features, widely available alternative.

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