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MAX1681ESA

Manufacturer: MAXIM

125mA / Frequency-Selectable / Switched-Capacitor Voltage Converters

Partnumber Manufacturer Quantity Availability
MAX1681ESA MAXIM 1787 In Stock

Description and Introduction

125mA / Frequency-Selectable / Switched-Capacitor Voltage Converters The MAX1681ESA is a high-efficiency, step-down DC-DC converter manufactured by Maxim Integrated. Below are its specifications, descriptions, and features:

### **Specifications:**  
- **Input Voltage Range:** 4V to 28V  
- **Output Voltage Range:** Adjustable from 1.25V to 26V  
- **Output Current:** Up to 1A  
- **Switching Frequency:** 100kHz  
- **Efficiency:** Up to 90%  
- **Operating Temperature Range:** -40°C to +85°C  
- **Package:** 8-pin SOIC (ESA)  
- **Duty Cycle:** Up to 95%  
- **Quiescent Current:** 1.5mA (typical)  

### **Descriptions:**  
The MAX1681ESA is a step-down (buck) switching regulator designed for high-efficiency power conversion. It integrates a power MOSFET switch, simplifying external component requirements. The device is suitable for battery-powered applications, industrial systems, and automotive electronics due to its wide input voltage range and robust performance.  

### **Features:**  
- **Integrated Power MOSFET** – Reduces external component count.  
- **Adjustable Output Voltage** – Set via external resistors.  
- **Low Dropout Operation** – Maintains regulation even when input voltage approaches output voltage.  
- **Current-Limit Protection** – Prevents damage from excessive load currents.  
- **Thermal Shutdown** – Protects the device from overheating.  
- **Wide Input Voltage Range** – Supports 4V to 28V inputs.  
- **High Efficiency** – Minimizes power loss in conversion.  
- **Stable with Low-ESR Capacitors** – Ensures reliable performance.  

This information is sourced from the manufacturer's datasheet.

Application Scenarios & Design Considerations

125mA / Frequency-Selectable / Switched-Capacitor Voltage Converters

Alternative Part Number

  • LT1054CS8 --: Switched-capacitor voltage converter/inverter in an 8-pin SOIC package, functionally similar to the MAX1681 and widely used as a drop-in style replacement.
  • ICL7660ACBA --: Classic charge-pump voltage inverter in SOIC-8 with comparable input range and current capability, a common alternative for MAX1681 designs.
  • TC7660EOA --: SOIC-8 charge-pump voltage converter with similar inversion function and pinout, suitable as a lower-cost second-source option.
  • ICL7660ACPA --: Classic charge-pump voltage inverter with comparable inverting/voltage-conversion function; check package and current rating against the design.
  • ICL7660CSA --: Classic CMOS charge-pump voltage converter in SO-8 that provides inversion/doubling functions comparable to the MAX1681.

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