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MAX1847EEE from MAX,MAXIM - Dallas Semiconductor

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MAX1847EEE

Manufacturer: MAX, N/A, MAXIM

High-Efficiency / Current-Mode / Inverting PWM Controller

Partnumber Manufacturer Quantity Availability
MAX1847EEE MAX, N/A, MAXIM 375 In Stock

Description and Introduction

High-Efficiency / Current-Mode / Inverting PWM Controller The MAX1847EEE is a step-down DC-DC converter manufactured by Maxim Integrated (now part of Analog Devices). Below are its key specifications, descriptions, and features:

### **Specifications:**  
- **Input Voltage Range:** 2.5V to 5.5V  
- **Output Voltage Range:** Adjustable from 0.8V to VIN  
- **Output Current:** Up to 500mA  
- **Switching Frequency:** 1MHz (typical)  
- **Efficiency:** Up to 95%  
- **Operating Temperature Range:** -40°C to +85°C  
- **Package:** 16-QSOP (Quad Flat Small Outline Package)  

### **Descriptions:**  
The MAX1847EEE is a high-efficiency, step-down DC-DC converter designed for low-power applications. It integrates synchronous rectification to minimize external components and improve efficiency. The device operates at a fixed 1MHz switching frequency, allowing for small external components and compact PCB layouts.  

### **Features:**  
- **Synchronous Rectification:** Improves efficiency and reduces power loss.  
- **Adjustable Output Voltage:** Set via an external resistor divider.  
- **Low Dropout Operation:** Allows the output to stay in regulation even when the input voltage approaches the output voltage.  
- **Internal Soft-Start:** Reduces inrush current during startup.  
- **Overcurrent and Thermal Protection:** Safeguards the device under fault conditions.  
- **Low Quiescent Current:** Enhances battery life in portable applications.  

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

Application Scenarios & Design Considerations

High-Efficiency / Current-Mode / Inverting PWM Controller

Alternative Part Number

  • LT1945EMS --: Dual-channel high-voltage step-up/inverting DC-DC converter in MSOP-16, functionally similar to the MAX1847 for LCD bias and general boost/inverter applications.
  • TPS65130RGER --: Dual-output boost plus inverting converter in a small QFN package, commonly used as a drop-in functional substitute for MAX1847-type LCD bias supplies.
  • MC34063ADR2G --: Widely available general-purpose DC-DC switching regulator that can be configured for step-up or inverting topologies, offering a low-cost fallback when exact pin compatibility is not required.
  • LT1940EFE --: High-voltage inverting DC-DC converter in TSSOP-16 with comparable input range and switching capability, suitable as a functional substitute for the MAX1847 in negative-output applications.
  • TPS54060DGQ --: Wide-input buck/inverting converter in a similar small package, offering comparable current capability and flexible topology for designs originally using the MAX1847.

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