LT8495EFE#PBF

Voltage - Output (Min/Fixed):	1.202V
Base Part Number:	LT8495
Supplier Device Package:	20-TSSOP-EP
Package / Case:	20-TSSOP (0.173", 4.40mm Width) Exposed Pad
Mounting Type:	Surface Mount
Operating Temperature:	-40°C ~ 125°C (TJ)
Synchronous Rectifier:	Both
Frequency - Switching:	250kHz ~ 1MHz
Current - Output:	2.1A (Switch)
Voltage - Output (Max):	70V (Switch)
Series:	--
Voltage - Input (Max):	60V
Voltage - Input (Min):	1V
Number of Outputs:	1
Output Type:	Adjustable
Topology:	Boost, Flyback, SEPIC
Output Configuration:	Positive
Function:	Step-Up, Step-Up/Step-Down
Part Status:	Active
Packaging:	Tube

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Introduction

The LT8495EFE#PBF is a wide input range synchronous step-down DC-DC switching regulator designed to convert an input voltage range of 4.5V to 35V down to a regulated output voltage as low as 0.6V. The LT8495EFE#PBF is based on the constant frequency, current mode architecture with built-in soft-start, thermal shutdown and short circuit protection making it suitable for a wide range of applications. Its 2-phase operation provides excellent line and load transient response that enables the regulator to deliver up to 8A output current at no load and up to 10A with a constant frequency current mode architecture.

Application Field

The LT8495EFE#PBF is ideally suited for applications that require high efficiency and robust operation in a wide temperature range. Its wide input voltage range and synchronous switch with low on-resistance allows it to operate over a wide range of power supply voltages. It can operate from a single Li-ion battery or from a variety of power sources, including a 5V or 12V fixed voltage power supply and industrial, automotive and medical 12V batteries. Its high efficiency and small total solution size make it ideal for space constrained applications such as medical, professional video and point of sale (POS) systems.The low output current capability of the switching regulators enables them to be used in low power systems such as microcontroller and smart metering systems, while the high output current capability makes them suitable for more power intensive applications such as DC motors, gate drives and lighting circuits. The LT8495EFE#PBF can be used in multiple power supply systems, including Rechargeable Li-Ion, USB and ACDC.

Working Principle

The LT8495EFE#PBF is a synchronous step-down DC-DC switching regulator that is designed to convert an input voltage of 4.5V to 35V down to a regulated output voltage as low as 0.6V. It utilizes a constant frequency, current-mode architecture to achieve high efficiency.The switching regulator operates in a two-phase mode. During the first phase, the high side switch is on and the low side switch is off. The current through the inductor is increased until it reaches the peak current limit (I_PEAK_TIME) set by the user. At this time, the high side switch is turned off and the low side switch is turned on. This turning off of the high side switch is controlled by the internal current limit and allows the inductor current to flow through the diode and through the low side switch to the output. This increases the inductor current and charges the output voltage.When the inductor current reaches its maximum level, the low side switch is turned off and the cycle begins again. This two-phase mode continuously regulates the output voltage to a set point when coupled with sufficient output capacitance.The LT8495EFE#PBF features a wide range of features that improve system performance, including an adjustable peak current limit, a soft-start feature, and thermal shutdown protection. This wide range of features makes the regulator suitable for a wide array of applications.

Conclusion

The LT8495EFE#PBF is a DC-DC switching regulator designed to convert an input voltage range of 4.5V to 35V down to a regulated output voltage as low as 0.6V. It is a two-phase synchronous step-down regulator that utilizes a constant frequency, current-mode architecture to achieve high efficiency. The LT8495EFE#PBF is ideal for applications demanding high efficiency and robust operation over a wide temperature range, including medical, professional video, point of sale (POS), microcontroller and smart metering systems, DC motors, gate drives, and lighting circuits. It features adjustable peak current limit, a soft-start feature, and thermal shutdown protection, making it suitable for a wide range of applications.

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