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LT1376 from LT

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LT1376

Manufacturer: LT, LINEAR

1.5A/ 500kHz Step-Down Switching Regulators

Partnumber Manufacturer Quantity Availability
LT1376 LT, LINEAR 647 In Stock

Description and Introduction

1.5A/ 500kHz Step-Down Switching Regulators The LT1376 is a high efficiency switching regulator manufactured by Linear Technology (now part of Analog Devices). Below are its key specifications, descriptions, and features:

### **Specifications:**  
- **Input Voltage Range:** 3.5V to 60V  
- **Output Voltage Range:** Adjustable from 1.25V to 50V  
- **Output Current:** Up to 1.5A  
- **Switching Frequency:** 500kHz (fixed)  
- **Efficiency:** Up to 90%  
- **Operating Temperature Range:** -40°C to +125°C  
- **Package Options:** TO-220, DD-Pak, and SO-8 (with different variants)  

### **Descriptions:**  
- The LT1376 is a current-mode step-down (buck) switching regulator.  
- It includes an onboard 1.5A power switch and requires minimal external components.  
- Designed for high efficiency and low dropout operation.  
- Features frequency compensation for stability across a wide range of conditions.  

### **Features:**  
- **Wide Input Voltage Range (3.5V to 60V)** – Suitable for automotive, industrial, and battery-powered applications.  
- **Adjustable Output Voltage (1.25V to 50V)** – Set via an external resistor divider.  
- **High Efficiency (Up to 90%)** – Minimizes power loss and heat dissipation.  
- **500kHz Switching Frequency** – Allows for smaller external components.  
- **Built-In Protection Features:**  
  - Overcurrent protection  
  - Thermal shutdown  
  - Soft-start for controlled power-up  
- **Low Dropout Operation** – Maintains regulation even when input voltage is close to output voltage.  
- **Minimal External Components** – Simplifies design and reduces board space.  

The LT1376 is commonly used in power supply designs for industrial, automotive, and telecom applications where high efficiency and wide input voltage range are critical.

Application Scenarios & Design Considerations

1.5A/ 500kHz Step-Down Switching Regulators

Alternative Part Number

  • LM2596S-5.0 --: Widely available step-down switching regulator with similar current capability and simple fixed-output design, suitable for many LT1376 buck applications.
  • MC34063A --: Classic versatile DC-DC switching regulator controller that can be configured as buck, boost, or inverting, offering a low-cost functional substitute for general-purpose designs.
  • TPS5430 --: 3A step-down converter with integrated switch and wide input range, providing higher current margin and modern replacement for many LT1376 buck regulator uses.

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