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MAX1954AEUB from MAXIM,MAXIM - Dallas Semiconductor

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MAX1954AEUB

Manufacturer: MAXIM

3.0 V to 13.2 V, low-cost, current-mode PWM buck controller with foldback current limit

Partnumber Manufacturer Quantity Availability
MAX1954AEUB MAXIM 2510 In Stock

Description and Introduction

3.0 V to 13.2 V, low-cost, current-mode PWM buck controller with foldback current limit The MAX1954AEUB is a step-down DC-DC converter manufactured by Maxim Integrated (now part of Analog Devices). Below are its specifications, descriptions, and features based on factual information from Ic-phoenix technical data files:

### **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%  
- **Operating Temperature Range:** -40°C to +85°C  
- **Package:** 10-pin µMAX (MicroMAX)  

### **Descriptions:**
The MAX1954AEUB is a high-efficiency, step-down DC-DC converter designed for portable applications. It integrates a synchronous rectifier for improved efficiency and operates at a fixed 1MHz switching frequency, allowing the use of small external components. The device features a low-dropout mode for extended battery life and includes soft-start and overcurrent protection.

### **Features:**
- **High Efficiency:** Up to 95% efficiency with synchronous rectification.  
- **Low Quiescent Current:** 30µA (typical) in shutdown mode.  
- **Adjustable Output Voltage:** Set via external resistors.  
- **PWM/PFM Mode Operation:** Automatically switches for optimal efficiency.  
- **Internal Soft-Start:** Reduces inrush current.  
- **Overcurrent and Thermal Protection:** Ensures safe operation.  
- **Small Footprint:** 10-pin µMAX package saves board space.  

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

Application Scenarios & Design Considerations

3.0 V to 13.2 V, low-cost, current-mode PWM buck controller with foldback current limit

Alternative Part Number

  • LTC3406ES5 --: Pin-compatible step-down DC-DC converter in a similar SOT-23-5 package with comparable input voltage range and output current, widely used as a drop-in replacement for MAX1954 designs.
  • TPS62203DBVR --: High-efficiency synchronous buck converter in SOT-23-5 with similar switching frequency and current rating, offering a different vendor option with good availability.
  • AP3402KTR-G1 --: Low-cost 2A synchronous step-down converter in SOT-23-5 that matches the MAX1954's compact footprint and basic electrical specifications for cost-sensitive designs.
  • LTC3406AES5 --: Similar high-efficiency step-down DC-DC converter in a small SOT-23 package with comparable input voltage range and output current, suitable as a functional replacement.
  • TPS62290DRV --: Pin-compatible-class synchronous buck converter with similar switching frequency and current rating, widely available and often used as a drop-in alternative for MAX1954 designs.
  • AP3211KTR-G1 --: Low-cost step-down converter with comparable voltage and current specifications, offering a cost-effective alternative when exact MAXIM part is unavailable.

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