Voltage - Output (Min/Fixed):	3.3V, 5V
Base Part Number:	LTC1515
Supplier Device Package:	8-SOIC
Package / Case:	8-SOIC (0.154", 3.90mm Width)
Mounting Type:	Surface Mount
Operating Temperature:	-40°C ~ 85°C (TA)
Synchronous Rectifier:	No
Frequency - Switching:	650kHz
Current - Output:	50mA
Voltage - Output (Max):	--
Series:	--
Voltage - Input (Max):	10V
Voltage - Input (Min):	2V
Number of Outputs:	1
Output Type:	Programmable
Topology:	Charge Pump
Output Configuration:	Positive
Function:	Step-Up/Step-Down
Part Status:	Active
Packaging:	Tape & Reel (TR)

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LTC1515IS8-3.3/5#TRPBF application field and working principle

Introduction

LTC1515IS8-3.3/5#TRPBF is a DC/DC buck converter with a power switch provided by Linear Technology Corporation. As aDC/DC buck converter, it has the capacity to adjust the output voltage for a given input and load, providing significant powersavings over linear regulators and other switching regulators in many applications. This article will provide an overview of theapplication field, specification and working principle of the LTC1515IS8-3.3/5#TRPBF.

Application Fields

LTC1515IS8-3.3/5#TRPBF offers up to 2A in adjustable output current at 1V switching frequency and integratesprogrammable features such as synchronous rectification control circuitry and a slew rate control. The unit provideseconomical and space-efficient solutions to applications including personal computers, printers, scanners, laserapplications, telecommunication, industrial and consumer electronic system.

Specifications

The LTC1515IS8-3.3/5#TRPBF can efficiently convert power from an input of up to 24V to a regulated output from 1.2V to22V. It has a 1.2MHz switching frequency and its integrated circuit protection scheme limits in-rush current,preventing damage during power-up and power-down. Additionally, its SENSE pin eliminates the need for externalcomponents and allows for improved efficiency at higher loads.

Working Principle

The LTC1515IS8-3.3/5#TRPBF uses a synchronous switching architecture to convert the input voltage to the desired output voltage. Itsintegrated power switch is controlled by the PWM signal of the Controller IC. The PWM signal starts and stops theswitching cycle of the power switch. The frequency and duty cycle of the PWM signal is adjusted in order to regulatethe output voltage. When the output voltage is too low, the controller IC increases the duty cycle of the PWM signalthereby increasing the on time of the power switch and increasing the output voltage. When the output voltage istoo high, the controller IC decreases the duty cycle of the PWM signal thereby decreasing the on time of the powerswitch and decreasing the output voltage.In conclusion, the LTC1515IS8-3.3/5#TRPBF is an efficient and versatile DC/DC buck converter suitable for a broad range of applications. It offers superior power conversion and electrical performance, with programmable features that allow custom applications and easy operation. Its synchronous switching architecture allows for adjusted voltage and current outputs over a wide range, providing a cost and space efficient solution for many applications.

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