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MAX1939EEI from MAXIM,MAXIM - Dallas Semiconductor

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MAX1939EEI

Manufacturer: MAXIM, MAX

Two-Phase Desktop CPU Core Supply Controllers with Controlled VID Change
Partnumber Manufacturer Quantity Availability
MAX1939EEI MAXIM, MAX 311 In Stock

Description and Introduction

Two-Phase Desktop CPU Core Supply Controllers with Controlled VID Change The MAX1939EEI is a 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  
- **Part Number:** MAX1939EEI  
- **Package:** 28-pin SSOP (Shrink Small Outline Package)  
- **Operating Temperature Range:** -40°C to +85°C  
- **Input Voltage Range:** 4.5V to 5.5V  
- **Output Voltage Range:** Adjustable (dependent on configuration)  
- **Output Current:** Up to 3A  
- **Switching Frequency:** 300kHz (typical)  
- **Efficiency:** Up to 95%  

### **Description:**  
The MAX1939EEI is a high-efficiency, step-down DC-DC converter designed for applications requiring high output current with minimal power loss. It integrates synchronous rectification to improve efficiency and reduce external component count. The device features an adjustable output voltage and includes overcurrent and thermal protection.

### **Features:**  
- **Synchronous Rectification:** Improves efficiency and reduces heat dissipation.  
- **Adjustable Output Voltage:** Configurable via external resistors.  
- **High Output Current:** Supports up to 3A.  
- **Wide Input Voltage Range:** 4.5V to 5.5V.  
- **Integrated Protection:** Includes overcurrent and thermal shutdown.  
- **Fixed Switching Frequency:** 300kHz operation for stable performance.  
- **Low Dropout Operation:** Maintains regulation even with small input-output differentials.  

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

Application Scenarios & Design Considerations

Two-Phase Desktop CPU Core Supply Controllers with Controlled VID Change

Alternative Part Number

  • LTC3728LEUH --: Dual-phase synchronous step-down controller in a similar QFN/SSOP-class package, functionally comparable to the MAX1939 power-supply controller and widely available.
  • ISL6262CRZ --: Multi-phase PWM buck controller with comparable voltage-mode regulation features, suitable as a functional substitute in CPU/VRM power designs.
  • TPS40170RGYR --: Synchronous buck controller with wide input range and similar control architecture, offering a different vendor and series as a drop-in style alternative.
  • ISL6566CRZ --: Multiphase buck PWM controller with integrated gate drivers, commonly used as a drop-in class alternative for CPU VRM designs.
  • TPS59620RHAR --: Dual-channel synchronous buck controller for CPU/GPU core rails, offering comparable control features and a different vendor series for second sourcing.

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