Voltage - Output (Min/Fixed):	0.425V (0.6V)
Base Part Number:	LTC3562
Supplier Device Package:	20-QFN (3x3)
Package / Case:	20-WFQFN Exposed Pad
Mounting Type:	Surface Mount
Operating Temperature:	-40°C ~ 85°C (TA)
Synchronous Rectifier:	Yes
Frequency - Switching:	2.25MHz
Current - Output:	400mA, 600mA
Voltage - Output (Max):	0.8V (3.78V)
Series:	--
Voltage - Input (Max):	5.5V
Voltage - Input (Min):	2.7V
Number of Outputs:	4
Output Type:	Adjustable (Programmable)
Topology:	Buck
Output Configuration:	Positive
Function:	Step-Down
Part Status:	Active
Packaging:	Tape & Reel (TR)

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PMIC – Voltage Regulators – DC DC Switching Regulators

Introduction

The LTC3562EUD#TRPB is a cascade-switching power regulator with a wide input voltage range of 4.5 V to 90 V suitable for industrial applications and suitable for rugged applications. This regulator is capable of output current of up to 3 A, and includes linear and PFM control modes to meet performance specifications. It also has a comprehensive protection system which includes under-voltage lockout (UVLO), over-voltage shutdown, current limitation, and thermal shutdown.

Application Field

The LTC3562EUD#TRPB is suitable for use in a wide variety of applications. It can be used as an off-line power supply, DC-DC converter, or as an intermediate bus converter in a cascading configuration. It is typically used for distributed-power systems, LED drivers, motor control circuits, DC-DC converters, and battery-powered applications. It can also be used as a step-down or step-up DC-DC converter in battery-powered applications, providing reliable energy to components requiring long operating life and low power consumption.

Features

The LTC3562EUD#TRPB is a synchronous rectifying buck regulator which has many features that make it suitable for a variety of applications. It comes with a wide input voltage range of 4.5 V to 90 V, 3 A maximum output current, and an overall efficiency of up to 95%. It also features EMI-optimized switching frequencies, adaptive on/off control for green operation, external synchronization, and adjustable soft-start for reduced inrush current.

Working Principle

The LTC3562EUD#TRPB regulator works like a conventional buck regulator, but with some important modifications. The device uses two independent voltage loop controllers, a high-side and a low-side, in order to maintain a stable output voltage despite wide variations in the input voltage. The high-side controller regulates the upper MOSFET power switch, while the low-side controller regulates the lower MOSFET power switch. The upper and lower power switches regulate the output voltage by modulating the duty cycle of the switching cycle.The LTC3562EUD#TRPB also has an EMI optimization feature that helps reduce conducted noise by adjusting the switching frequency. It also uses an adaptive on/off control scheme that reduces power consumption and increases overall efficiency by only switching the power MOSFET when the output voltage needs to be adjusted.

Conclusion

The LTC3562EUD#TRPB is a versatile DC-DC switching regulator that can be used in a wide variety of applications. It has a wide input voltage range, high Efficiency levels, low overshoot, and integrated protection features and EMI optimization. All of these features make the LTC3562EUD#TRPB an excellent choice for industrial, automotive, and battery-powered applications.

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