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The LT3502AEDC is a current-mode PWM buck DC/DC converter with an internal 500mA power switch, housed in a compact 8-pin 2mm x 2mm DFN package. The wide input voltage range of 3V to 40V makes the LT3502/LT3502A ideal for regulating power from various sources, including 24V industrial power supplies and automotive batteries. Its high operating frequency allows the use of compact, low-cost inductors and capacitors, resulting in an extremely compact solution. A constant frequency above the AM band avoids interference with radio reception, making the LT3502AEDC particularly suitable for automotive applications.

Cycle-by-cycle current limiting and frequency foldback provide protection against short-circuit outputs. Soft start and frequency foldback eliminate input inrush current during startup. DA current sensing provides additional protection under fault conditions. An internal boost diode reduces the number of components.

 LT3502AEDC Features

3V to 40V input voltage range

500mA output current

Switching frequency: 2.2MHz (LT3502A), 1.1MHz (LT3502)

800mV feedback voltage

Strong short-circuit protection

Soft start

Low shutdown current: < 2μA

Internal compensation

Internal boost diode

LT3502AEDC Product Attributes

Function: Buck  

Output configuration: Positive  

Topology: Buck  

Output Type: Adjustable  

Number of Outputs: 1  

Voltage - Input (Minimum): 3V  

Voltage - Input (Maximum): 40V  

Voltage - Output (Minimum/Fixed): 0.8V  

Voltage - Output (Maximum): 32V  

Current - Output: 500mA  

Frequency - Switching: 2.25MHz  

Synchronous Rectifier: None  

Operating Temperature: -40°C to 125°C (TJ)  

Mounting Type: Surface Mount  

Package/Case: 8-WFDFN Bare Pad  

Supplier Device Package: 8-DFN (2x2)  

LT3502AEDC Applications

Automotive Systems

Battery-Powered Devices

Wall Transformer Regulation

Distributed Power Regulation

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