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MAX857ESA+T from MAXIM,MAXIM - Dallas Semiconductor

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MAX857ESA+T

Manufacturer: MAXIM

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

Partnumber Manufacturer Quantity Availability
MAX857ESA+T MAXIM 5000 In Stock

Description and Introduction

3.3V/5V or Adjustable Output, Step-Up DC-DC Converters The MAX857ESA+T is a step-up DC-DC converter manufactured by Maxim Integrated (now part of Analog Devices).  

### **Specifications:**  
- **Input Voltage Range:** 0.7V to 5.5V  
- **Output Voltage:** Adjustable from 2V to 5.5V  
- **Output Current:** Up to 300mA (depending on input/output conditions)  
- **Switching Frequency:** 500kHz  
- **Efficiency:** Up to 90%  
- **Operating Temperature Range:** -40°C to +85°C  
- **Package:** 8-pin SOIC (Small Outline Integrated Circuit)  
- **Shutdown Current:** <1µA  

### **Descriptions:**  
The MAX857ESA+T is a low-power, step-up DC-DC converter designed for battery-powered applications. It features an internal N-channel MOSFET switch and requires minimal external components. The device is optimized for low-input-voltage operation, making it suitable for single-cell or dual-cell battery systems.  

### **Features:**  
- **Low Start-Up Voltage:** Operates down to 0.7V  
- **Adjustable Output Voltage** (via external resistors)  
- **Internal MOSFET Switch** (reduces external component count)  
- **Low Quiescent Current:** 25µA (typical)  
- **Pulse-Skipping Mode** for improved efficiency at light loads  
- **Thermal Shutdown Protection**  
- **Undervoltage Lockout (UVLO)**  

This device is commonly used in portable electronics, such as wireless sensors, medical devices, and handheld instruments.  

(Source: Maxim Integrated datasheet)

Application Scenarios & Design Considerations

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

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