LT3470ETS8#TRMPBF

Voltage - Output (Min/Fixed):	1.25V
Base Part Number:	LT3470
Supplier Device Package:	TSOT-23-8
Package / Case:	SOT-23-8 Thin, TSOT-23-8
Mounting Type:	Surface Mount
Operating Temperature:	0°C ~ 85°C (TA)
Synchronous Rectifier:	No
Frequency - Switching:	--
Current - Output:	200mA
Voltage - Output (Max):	16V
Series:	--
Voltage - Input (Max):	40V
Voltage - Input (Min):	4V
Number of Outputs:	1
Output Type:	Adjustable
Topology:	Buck
Output Configuration:	Positive
Function:	Step-Down
Part Status:	Active
Packaging:	Tape & Reel (TR)

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Introduction

The LT3470ETS8#TRMPBF is a high-efficiency, wide input voltage range, DC/DC switching regulator with a switching frequency up to 1 MHz. It operates from 4.5 V to 30 V and supports up to 30 V of output voltage. It is designed to provide a regulated voltage to loads up to 3 A. This device belongs to the family of PMIC (Power Management Integrated Circuit) Voltage Regulators, and specifically DC DC Switching regulators. The LT3470ETS8#TRMPBF provides a low cost, uncomplicated power solution for systems requiring either a step-up or a step-down converter.

Application Field

The LT3470ETS8#TRMPBF is suitable for a wide range of applications such as computer systems, automotive, industrial, communications, and consumer electronics. It is often used in portable device applications because of its high efficiency, low quiescent current, and wide input voltage range. It is often used in applications with power supplies that include battery, renewable energy, or high efficiency power adapter. Additionally, this device is used in automotive applications such as infotainment, ADAS, powertrain, lighting and e-motors. It can also be used in industrial applications such as distributed power systems, PLC, I/O interfaces, and data acquisition systems.

Working Principle

The LT3470ETS8#TRMPBF uses pulse width modulation (PWM) principles to control the voltage and current output. The device works in two modes: step-up (boost mode) and step-down (buck mode). The boost mode increases the input voltage and reduces the current at the same time, whereas the buck mode reduces the input voltage and increases the output current. The device works by controlling the on-time of the internal power MOSFET. The current flowing through the MOSFET is proportional to the duty cycle of the input signal, thus controlling the output voltage and current. To ensure stability, the device contains two loop compensation networks: one for the voltage and the other for the current.

Conclusion

The LT3470ETS8#TRMPBF is an efficient, wide input voltage range DC/DC switching regulator. It is suitable for applications such as computer systems, automotive, industrial, communications, and consumer electronics. It uses pulse width modulation principles to control the voltage and current output and operates in step-up (boost mode) and step-down (buck mode). The device contains two loop compensation networks: one for the voltage and the other for the current, to ensure stability. Therefore, the LT3470ETS8#TRMPBF is an ideal device to provide a low cost and uncomplicated power solution for systems requiring either a step-up or a step-down converter.

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