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MAX1858A from MAX,MAXIM - Dallas Semiconductor

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MAX1858A

Manufacturer: MAX

Dual 180° Out-of-Phase Buck Controllers with Sequencing/Prebias Startup and POR

Partnumber Manufacturer Quantity Availability
MAX1858A MAX 20 In Stock

Description and Introduction

Dual 180° Out-of-Phase Buck Controllers with Sequencing/Prebias Startup and POR The MAX1858A 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:** 2.6V to 5.5V  
- **Output Voltage Range:** Adjustable from 0.8V to VIN  
- **Output Current:** Up to 600mA  
- **Switching Frequency:** 1MHz (fixed)  
- **Efficiency:** Up to 95%  
- **Quiescent Current:** 30µA (typical)  
- **Operating Temperature Range:** -40°C to +85°C  
- **Package:** 6-pin SOT23  

### **Descriptions:**  
The MAX1858A is a synchronous step-down DC-DC converter optimized for portable applications. It integrates both high-side and low-side MOSFETs, reducing external component count. The device operates at a fixed 1MHz switching frequency, allowing for small external components while maintaining high efficiency.  

### **Features:**  
- **High Efficiency:** Up to 95%  
- **Low Dropout Operation:** 100% duty cycle for low input voltages  
- **Pulse-Width Modulation (PWM) Mode:** Ensures low noise and high efficiency  
- **Internal Synchronous Rectifier:** Eliminates the need for an external Schottky diode  
- **Soft-Start:** Reduces inrush current  
- **Thermal Shutdown Protection:** Prevents overheating  
- **Undervoltage Lockout (UVLO):** Ensures proper operation under low input voltage conditions  

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

Application Scenarios & Design Considerations

Dual 180° Out-of-Phase Buck Controllers with Sequencing/Prebias Startup and POR

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