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MAX1649CSA from MAXIM,MAXIM - Dallas Semiconductor

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MAX1649CSA

Manufacturer: MAXIM

5V/3.3V or Adjustable, High-Efficiency, Low-Dropout, Step-Down DC-DC Controllers

Partnumber Manufacturer Quantity Availability
MAX1649CSA MAXIM 600 In Stock

Description and Introduction

5V/3.3V or Adjustable, High-Efficiency, Low-Dropout, Step-Down DC-DC Controllers The MAX1649CSA is a DC-DC converter manufactured by Maxim Integrated. Below are its specifications, descriptions, and features based on factual information from Ic-phoenix technical data files:

### **Specifications:**  
- **Manufacturer:** Maxim Integrated  
- **Part Number:** MAX1649CSA  
- **Type:** Step-Up (Boost) DC-DC Converter  
- **Input Voltage Range:** 1.8V to 16.5V  
- **Output Voltage Range:** Adjustable (up to 28V)  
- **Output Current:** Up to 300mA  
- **Switching Frequency:** 500kHz  
- **Efficiency:** Up to 90%  
- **Operating Temperature Range:** 0°C to +70°C  
- **Package:** 8-pin SOIC  

### **Descriptions:**  
The MAX1649CSA is a high-efficiency, step-up DC-DC converter designed for low-voltage applications. It integrates a power MOSFET and provides a regulated output voltage from a single-cell or multi-cell battery input. The device is optimized for portable electronics, such as LCD bias supplies, flash memory programming, and other low-power applications requiring a boosted voltage.  

### **Features:**  
- **Wide Input Voltage Range (1.8V to 16.5V)** – Supports multiple battery configurations.  
- **Adjustable Output Voltage (Up to 28V)** – Set via external resistors.  
- **Internal Power MOSFET** – Simplifies design and reduces external component count.  
- **High Efficiency (Up to 90%)** – Minimizes power loss in battery-operated devices.  
- **500kHz Switching Frequency** – Allows for compact inductor and capacitor selection.  
- **Low Quiescent Current (50µA)** – Enhances battery life in standby mode.  
- **Soft-Start Function** – Prevents inrush current at startup.  
- **Thermal Shutdown Protection** – Safeguards the device from overheating.  

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

Application Scenarios & Design Considerations

5V/3.3V or Adjustable, High-Efficiency, Low-Dropout, Step-Down DC-DC Controllers

Alternative Part Number

  • LTC1149CS --: High-efficiency step-down switching regulator controller in the same function class, widely used as a MAX1649 substitute with similar input voltage range and current-mode control.
  • MC34063ACD --: Versatile DC-DC converter controller covering step-down, step-up and inverting topologies; a common low-cost alternative when exact MAX1649 features are not critical.
  • LM2575T-ADJ --: Integrated adjustable step-down regulator with simple external component count, suitable as a functional replacement in many MAX1649 buck-converter applications.
  • LTC1772CS8 --: Step-down DC-DC controller in an 8-pin SOIC package with comparable input voltage range and switching architecture, suitable as a functional substitute for the MAX1649CSA.
  • LM3478MM --: Wide-input-voltage step-down controller in a small MSOP package offering similar regulation functionality and a different series naming, making it a clear alternative.

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