LTC3838EUHF-2#PBF

Frequency - Switching:	200kHz ~ 2MHz
Base Part Number:	LTC3838
Supplier Device Package:	38-QFN (5x7)
Package / Case:	38-WFQFN Exposed Pad
Operating Temperature:	-40°C ~ 125°C (TJ)
Control Features:	Enable, Frequency Control, Phase Control, Power Good, Soft Start, Tracking
Serial Interfaces:	--
Clock Sync:	No
Synchronous Rectifier:	Yes
Duty Cycle (Max):	--
Series:	PolyPhase®
Voltage - Supply (Vcc/Vdd):	4.5 V ~ 38 V
Output Phases:	2
Number of Outputs:	2
Topology:	Buck
Output Configuration:	Positive
Function:	Step-Down
Output Type:	Transistor Driver
Part Status:	Active
Packaging:	Tube

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Introduction

Voltage regulators are a type of PMIC (Power Management Integrated Circuit) that regulate and maintain the output voltage of a power supply within a certain range. DC DC Switching Controllers are a specific type of voltage regulator that use fast switching technology to regulate the output voltage. The LTC3838EUHF-2#PBF is an example of a DC DC Switching Controller.

Application Field

The LTC3838EUHF-2#PBF is most commonly used in applications where high efficiency, fast transient response, and low noise performance is desired. These include non-isolated point-of-load supplies, isolated DC-DC converters, as well as boost and flyback converters. It can also be used for SEPIC, Cuk, and forward converter topologies.The LTC3838EUHF-2#PBF is suitable for applications such as data communication systems, battery-powered equipment, RAID systems, set-top boxes, and instrumentation. It is designed to work with high frequency switching regulators, making it well-suited for any application where high efficiency and high speed are needed.

Features

The LTC3838EUHF-2#PBF is designed to provide high efficiency and fast transient response in a wide range of applications. Its features include: - Wide input voltage range: The LTC3838EUHF-2#PBF support input voltages from 0.8V to 20V, making it ideal for applications that require a wide range of voltages. - High Frequency Operation: The LTC3838EUHF-2#PBF is capable of operating at frequencies up to 1MHz, allowing for efficient conversion of high frequency switching regulators. - Programmable Frequency: With the LTC3838EUHF-2#PBF, the switching frequency can be programmed from 200kHz to 1MHz, allowing for efficient conversion at any given frequency.- High Efficiency: The LTC3838EUHF-2#PBF supports a wide range of efficiency and power levels, making it a great choice for applications that require high efficiency.- Low Output Capacitance: The LTC3838EUHF-2#PBF has a very low output capacitance of 6pF, ensuring a fast transient response. - Wide Temperature Range: The LTC3838EUHF-2#PBF supports a wide temperature range of -40°C to +125°C, making it suitable for variable temperature applications. - Flexible Control Options: The LTC3838EUHF-2#PBF supports a wide range of control options, including external PWM control, internal or external current limit control, and flexible soft start.

Working Principle

The LTC3838EUHF-2#PBF is a switched-mode power supply controller, meaning it uses fast switching technology to regulate the output voltage. The LTC3838EUHF-2#PBF works by using a pair of P-channel and N-channel power MOSFETs. When the supply voltage is applied, the integrated controller starts the internal oscillator, which then synchronizes the internal logic and timing circuits. The internal logic then detects the voltage feed-back signal, which is compared with the internal reference voltage to determine the output voltage. Based on the comparison, the internal logic then adjusts the switching waveforms of the power MOSFETs to maintain the output voltage. The LTC3838EUHF-2#PBF also offers an additional enable pin so that the device can be disabled when not needed. This feature helps to conserve power and reduce power dissipation.

Conclusion

The LTC3838EUHF-2#PBF is a powerful DC-DC switching controller that offers high efficiency, fast transient response, and low noise performance. It can be used in a variety of applications and is suitable for use in high frequency switching regulators. The LTC3838EUHF-2#PBF can help optimize the conversion efficiency and optimize transient response of a switching power supply.

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