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MAX1858EEG from MAXIM,MAXIM - Dallas Semiconductor

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MAX1858EEG

Manufacturer: MAXIM

Dual 180 Out-of-Phase PWM Step-Down Controller with Power Sequencing and POR

Partnumber Manufacturer Quantity Availability
MAX1858EEG MAXIM 1000 In Stock

Description and Introduction

Dual 180 Out-of-Phase PWM Step-Down Controller with Power Sequencing and POR The MAX1858EEG is a high-efficiency, step-down DC-DC converter manufactured by Maxim Integrated (now part of Analog Devices). Below are its key specifications, descriptions, and features:

### **Specifications:**
- **Input Voltage Range:** 4.5V to 28V  
- **Output Voltage Range:** Adjustable from 0.8V to 90% of VIN  
- **Output Current:** Up to 5A  
- **Switching Frequency:** 300kHz (adjustable)  
- **Efficiency:** Up to 95%  
- **Operating Temperature Range:** -40°C to +85°C  
- **Package:** 24-pin QSOP  

### **Descriptions:**
- The MAX1858EEG is a synchronous buck (step-down) DC-DC converter designed for high-efficiency power conversion.  
- It integrates high-side and low-side MOSFETs, reducing external component count.  
- Suitable for applications requiring high current and wide input voltage ranges, such as industrial, telecom, and automotive systems.  

### **Features:**
- **Integrated Power MOSFETs:** Reduces external component requirements.  
- **Adjustable Output Voltage:** Set via external resistors.  
- **PWM/PFM Mode Operation:** Optimizes efficiency at light loads.  
- **Soft-Start Function:** Prevents inrush current at startup.  
- **Overcurrent and Thermal Protection:** Enhances reliability.  
- **Low Dropout Operation:** Maintains regulation even when input voltage is close to output.  

For detailed application notes and schematics, refer to the official datasheet from Maxim Integrated (Analog Devices).

Partnumber Manufacturer Quantity Availability
MAX1858EEG T32D 67 In Stock

Description and Introduction

Dual 180 Out-of-Phase PWM Step-Down Controller with Power Sequencing and POR The MAX1858EEG+T is a step-up DC-DC converter from Maxim Integrated (now part of Analog Devices). Here are its key specifications, descriptions, and features:

### **Specifications:**
- **Input Voltage Range:** 0.7V to 5.5V  
- **Output Voltage:** Adjustable from 1.8V 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:** 24-pin QSOP  

### **Descriptions:**
The MAX1858EEG+T is a high-efficiency, low-voltage, step-up DC-DC converter designed for battery-powered applications. It integrates a synchronous rectifier for improved efficiency and is optimized for low-input-voltage operation, making it suitable for single-cell or dual-cell alkaline/NiMH battery systems.

### **Features:**
- **True Low-Voltage Operation:** Starts up with inputs as low as 0.7V.  
- **Synchronous Rectification:** Improves efficiency and eliminates the need for an external Schottky diode.  
- **Adjustable Output Voltage:** Set via an external resistor divider.  
- **Low Quiescent Current:** 25µA (typical) for improved battery life.  
- **Internal Soft-Start:** Reduces inrush current during startup.  
- **Undervoltage Lockout (UVLO):** Ensures proper operation under low-input conditions.  
- **Thermal Shutdown Protection:** Prevents damage from excessive heat.  

This device is commonly used in portable electronics, medical devices, and other low-power applications requiring efficient voltage conversion.

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