LTC3823EUH#PBF

Frequency - Switching:	--
Base Part Number:	LTC3823
Supplier Device Package:	32-QFN (5x5)
Package / Case:	32-WFQFN Exposed Pad
Operating Temperature:	-40°C ~ 85°C (TA)
Control Features:	Enable, On Time Control, Power Good, Soft Start, Tracking
Serial Interfaces:	--
Clock Sync:	No
Synchronous Rectifier:	Yes
Duty Cycle (Max):	90%
Series:	--
Voltage - Supply (Vcc/Vdd):	4.5 V ~ 36 V
Output Phases:	1
Number of Outputs:	1
Topology:	Buck
Output Configuration:	Positive
Function:	Step-Down
Output Type:	Transistor Driver
Part Status:	Active
Packaging:	Tube

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Introduction

The LTC3823EUH#PBF is a high current, monolithic, DC-DC synchronous buck switching voltage regulator. The feature set includes a wide current range of 0.04A − 10A with adjustable output voltage range, internal soft-start for power sequencing, 3-phase architecture for high efficiency, programmable switching switching frequency, and dynamic voltage scaling for VID control. The LTC3823EUH#PBF is capable of providing excellent transient performance while operating over a wide input voltage range, making it ideal for a wide variety of applications.

Application Field

The LTC3823EUH#PBF features a wide output voltage range and current capability, allowing it to be used in a variety of applications including computing, networking, and industrial control. It can be used to provide power to point-of-load (POL) converters, voltage regulators, microprocessors, DSPs, ASICs, and other similar products. The LTC3823EUH#PBF is also suitable for supplying power to intermediate bus converters as well as powering multiple voltage at the same time.

Working Principle

The LTC3823EUH#PBF employs a synchronous buck architecture which uses two NMOS switches in series. During normal operation, the switches alternately conduct, allowing current to flow through the primary side of the converter and allowing the increasing voltage to be bucked down to the output. The current through the primary inductor is regulated by the pulse-width modulation (PWM) of the NMOS switches. This regulation technique is compatible with the load line control regulation scheme, and the PWM control can be programmed for either a fixed or adjustable switching frequency.

Dynamic Voltage Scaling

The LTC3823EUH#PBF supports Dynamic Voltage Scaling (DVS) for quick response to changing load conditions. DVS is an effective way to quickly adjust the output voltage over a range of approximately 30% from swing low to swing high. This feature allows the regulator to maintain regulation under varying load conditions.

Safety and Regulatory Compliance

The LTC3823EUH#PBF has been designed to meet the following safety and regulatory standards: UL8750, CSA C22.2 #47, and EN62368 certifications. Additionally, the device provides robust protection features such as output short-circuit protection, overvoltage protection, current monitor, and thermal shutdown.

Conclusion

The LTC3823EUH#PBF is a high current, monolithic, synchronous buck voltage regulator which provides excellent performance with wide input voltage range. It is suitable for a variety of applications and provides robust protection features. It is also compliant with UL, CSA, and EN safety and regulatory standards.

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