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MAX1844ETP from MAXIM,MAXIM - Dallas Semiconductor

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MAX1844ETP

Manufacturer: MAXIM

High-Speed Step-Down Controller with Accurate Current Limit for Notebook Computers

Partnumber Manufacturer Quantity Availability
MAX1844ETP MAXIM 358 In Stock

Description and Introduction

High-Speed Step-Down Controller with Accurate Current Limit for Notebook Computers The MAX1844ETP is a step-down DC-DC converter manufactured by Maxim Integrated. Below are its specifications, descriptions, and features based on factual data from Ic-phoenix technical data files:

### **Specifications:**  
- **Input Voltage Range:** 2.6V to 5.5V  
- **Output Voltage Range:** Adjustable from 0.8V to VIN  
- **Output Current:** Up to 600mA  
- **Switching Frequency:** 1MHz (typical)  
- **Efficiency:** Up to 95%  
- **Operating Temperature Range:** -40°C to +85°C  
- **Package:** 20-pin TQFN (5mm x 5mm)  

### **Descriptions:**  
The MAX1844ETP is a high-efficiency, step-down DC-DC converter designed for low-power applications. It integrates synchronous rectification to minimize external component count and improve efficiency. The device operates at a fixed 1MHz switching frequency, allowing the use of small inductors and capacitors.  

### **Features:**  
- **Synchronous Rectification:** Improves efficiency and reduces power dissipation.  
- **Low Dropout Operation:** Allows the output to remain in regulation even when the input voltage approaches the output voltage.  
- **Pulse-Width Modulation (PWM) Mode:** Ensures stable operation under varying load conditions.  
- **Soft-Start Function:** Prevents inrush current during startup.  
- **Undervoltage Lockout (UVLO):** Ensures proper operation when input voltage is below the threshold.  
- **Thermal Shutdown Protection:** Protects the device from overheating.  

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

Application Scenarios & Design Considerations

High-Speed Step-Down Controller with Accurate Current Limit for Notebook Computers

Alternative Part Number

  • ISL6227CAZ --: Dual synchronous buck PWM controller with similar voltage-mode architecture and TQFN package, commonly used as a MAX1844 substitute in notebook power rails.
  • TPS51124RGER --: Dual-channel synchronous buck controller with comparable input range and current-mode control, suitable drop-in for many MAX1844 applications.
  • RT8205LZQW --: Dual PWM controller for notebook DDR/rail supplies with similar pinout and function, widely used as a cost-effective MAX1844 alternative.

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