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MAX1931EUB from MAX,MAXIM - Dallas Semiconductor

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MAX1931EUB

Manufacturer: MAX, MAXIM, MAXIM

Current-Limited Switch for Single USB Port

Partnumber Manufacturer Quantity Availability
MAX1931EUB MAX, MAXIM, MAXIM 2686 In Stock

Description and Introduction

Current-Limited Switch for Single USB Port The MAX1931EUB is a high-efficiency, step-down DC-DC converter manufactured by Maxim Integrated. Below are its key specifications, descriptions, and features:

### **Specifications:**  
- **Input Voltage Range:** 4.5V to 28V  
- **Output Voltage Range:** Adjustable from 0.8V to 5.5V  
- **Output Current:** Up to 500mA  
- **Switching Frequency:** 500kHz (fixed)  
- **Efficiency:** Up to 95%  
- **Operating Temperature Range:** -40°C to +85°C  
- **Package:** 10-pin µMAX® (3mm x 5mm)  

### **Descriptions:**  
The MAX1931EUB is a synchronous buck (step-down) DC-DC converter designed for high efficiency and compact power solutions. It integrates a high-side P-channel MOSFET and a low-side N-channel MOSFET, reducing external component count. The device operates at a fixed 500kHz switching frequency, making it suitable for noise-sensitive applications.  

### **Features:**  
- **High Efficiency:** Up to 95% with synchronous rectification.  
- **Low Quiescent Current:** 40µA (typical) in shutdown mode.  
- **Adjustable Output:** Set via external resistors.  
- **Internal Compensation:** Simplifies design and reduces external components.  
- **Soft-Start Function:** Prevents inrush current at startup.  
- **Thermal Shutdown Protection:** Safeguards against overheating.  
- **Undervoltage Lockout (UVLO):** Ensures proper operation under low input voltage.  

The MAX1931EUB is ideal for portable devices, industrial equipment, and automotive applications requiring efficient power conversion.

Application Scenarios & Design Considerations

Current-Limited Switch for Single USB Port

Alternative Part Number

  • TPS2553DBVR --: Adjustable current-limited power switch in SOT-23-6, functionally similar to the MAX1931 USB current-limit switch and widely available.
  • MIC2026-1YM --: Dual-channel USB power distribution switch with current limiting, a common alternative for USB port protection applications.
  • AP2553W6-7 --: Single-channel adjustable current-limited power switch in SOT-26, suitable replacement for USB current-limit switching.

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