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MAX857CSA from MAXIM,MAXIM - Dallas Semiconductor

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MAX857CSA

Manufacturer: MAXIM

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

Partnumber Manufacturer Quantity Availability
MAX857CSA MAXIM 72 In Stock

Description and Introduction

3.3V/5V or Adjustable-Output, Step-Up DC-DC Converters The MAX857CSA is a step-up DC-DC converter manufactured by Maxim Integrated (now part of Analog Devices). Below are the factual specifications, descriptions, and features from Ic-phoenix technical data files:

### **Specifications:**
- **Manufacturer:** Maxim Integrated  
- **Type:** Step-Up (Boost) DC-DC Converter  
- **Input Voltage Range:** 0.7V to 5.5V  
- **Output Voltage:** Adjustable (up to 5.5V) or fixed (3.3V or 5V)  
- **Output Current:** Up to 300mA (depending on input/output conditions)  
- **Switching Frequency:** 500kHz  
- **Efficiency:** Up to 94%  
- **Operating Temperature Range:** -40°C to +85°C  
- **Package:** 8-pin SOIC  

### **Descriptions:**
The MAX857CSA is a low-power, step-up DC-DC converter designed for battery-powered applications. It provides a regulated output voltage from a low input voltage, making it suitable for single-cell or dual-cell battery systems. The device includes an internal N-channel MOSFET switch and requires minimal external components.

### **Features:**
- **Low Start-Up Voltage:** Operates down to 0.7V  
- **Adjustable or Fixed Output Voltage Options**  
- **Internal 0.5A Power Switch**  
- **Low Quiescent Current:** 25µA (typical)  
- **Pulse-Frequency Modulation (PFM) for High Efficiency at Light Loads**  
- **Undervoltage Lockout (UVLO) Protection**  
- **Thermal Shutdown Protection**  
- **Small Footprint with Minimal External Components**  

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

Application Scenarios & Design Considerations

3.3V/5V or Adjustable-Output, Step-Up DC-DC Converters
Partnumber Manufacturer Quantity Availability
MAX857CSA 4073 In Stock

Description and Introduction

3.3V/5V or Adjustable-Output, Step-Up DC-DC Converters The MAX857CSA is a step-up DC-DC converter manufactured by Maxim Integrated. Below are its key specifications, descriptions, and features:

### **Specifications:**  
- **Input Voltage Range:** 0.7V to 5.5V  
- **Output Voltage:** Adjustable from 2V to 5.5V (fixed 3.3V or 5V options available)  
- **Output Current:** Up to 300mA (depending on input voltage)  
- **Switching Frequency:** 500kHz  
- **Efficiency:** Up to 94%  
- **Operating Temperature Range:** 0°C to +70°C  
- **Package:** 8-pin SOIC  

### **Descriptions:**  
The MAX857CSA is a low-power, step-up DC-DC converter designed for battery-powered applications. It integrates a power switch, synchronous rectifier, and control circuitry, making it suitable for space-constrained designs.  

### **Features:**  
- **Low Start-up Voltage:** Operates down to 0.7V  
- **Internal Synchronous Rectifier:** Improves efficiency  
- **Low Quiescent Current:** 16µA (typical)  
- **Automatic Pulse-Frequency Modulation (PFM):** Enhances efficiency at light loads  
- **Shutdown Mode:** Reduces current consumption to 0.1µA  
- **Soft-Start:** Prevents inrush current  

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

Application Scenarios & Design Considerations

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

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