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MAX857ESA from MAXIM,MAXIM - Dallas Semiconductor

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MAX857ESA

Manufacturer: MAXIM

3.3V/5V or Adjustable-Output, Step-Up DC-DC Converters

Partnumber Manufacturer Quantity Availability
MAX857ESA MAXIM 28 In Stock

Description and Introduction

3.3V/5V or Adjustable-Output, Step-Up DC-DC Converters The MAX857ESA is a step-up DC-DC converter manufactured by Maxim Integrated (now part of Analog Devices). Below are its specifications, descriptions, and features based on factual information from Ic-phoenix technical data files:

### **Specifications:**  
- **Input Voltage Range:** 0.7V to 5.5V  
- **Output Voltage:** Adjustable from 2V to 5.5V (fixed 3.3V or 5V versions available)  
- **Output Current:** Up to 300mA (depending on input voltage)  
- **Switching Frequency:** 500kHz  
- **Efficiency:** Up to 94%  
- **Operating Temperature Range:** -40°C to +85°C  
- **Package:** 8-pin SOIC (Small Outline Integrated Circuit)  

### **Descriptions:**  
The MAX857ESA is a low-power, step-up DC-DC converter designed for battery-powered applications. It integrates a power switch, oscillator, and control circuitry to provide a regulated output voltage from a low input voltage source. It is suitable for portable devices, such as wireless sensors, PDAs, and medical instruments.  

### **Features:**  
- **Low Start-Up Voltage:** Operates down to 0.7V  
- **Internal Power MOSFET:** Eliminates the need for an external switch  
- **Low Quiescent Current:** 16µA (typical)  
- **Automatic Pulse-Frequency Modulation (PFM):** Improves efficiency at light loads  
- **Short-Circuit Protection:** Prevents damage during output faults  
- **Small Footprint:** 8-pin SOIC package for space-constrained designs  

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

Application Scenarios & Design Considerations

3.3V/5V or Adjustable-Output, Step-Up DC-DC Converters

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