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MAX1845 from MAX,MAXIM - Dallas Semiconductor

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MAX1845

Manufacturer: MAX

Dual, High-Efficiency, Step-Down Controller with Accurate Current Limit

Partnumber Manufacturer Quantity Availability
MAX1845 MAX 1 In Stock

Description and Introduction

Dual, High-Efficiency, Step-Down Controller with Accurate Current Limit The MAX1845 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:**  
- **Input Voltage Range:** 2.6V to 5.5V  
- **Output Voltage Range:** Adjustable from 0.8V to VIN  
- **Output Current:** Up to 1A  
- **Switching Frequency:** 1MHz (typ.)  
- **Efficiency:** Up to 95%  
- **Operating Temperature Range:** -40°C to +85°C  
- **Package:** 8-pin µMAX  

### **Descriptions:**  
The MAX1845 is a synchronous step-down DC-DC converter designed for high efficiency and compact power solutions in portable applications. It integrates both high-side and low-side MOSFETs, reducing external component count. The device operates at a fixed 1MHz switching frequency, allowing the use of small inductors and capacitors.  

### **Features:**  
- **High Efficiency:** Up to 95% due to synchronous rectification.  
- **Low Dropout Operation:** Allows 100% duty cycle for extended battery life.  
- **Internal Synchronous Rectifier:** Eliminates the need for an external Schottky diode.  
- **Low Quiescent Current:** 40µA (typ.) in shutdown mode.  
- **Soft-Start Function:** Reduces inrush current during startup.  
- **Overcurrent and Thermal Protection:** Ensures safe operation under fault conditions.  
- **Adjustable Output Voltage:** Set via an external resistor divider.  

This information is based solely on the manufacturer's datasheet for the MAX1845.

Application Scenarios & Design Considerations

Dual, High-Efficiency, Step-Down Controller with Accurate Current Limit

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