LTC3872ITS8-1#TRMPBF

Frequency - Switching:	550kHz
Base Part Number:	LTC3872
Supplier Device Package:	TSOT-23-8
Package / Case:	SOT-23-8 Thin, TSOT-23-8
Operating Temperature:	-40°C ~ 125°C (TJ)
Control Features:	Current Limit, Enable, Soft Start
Serial Interfaces:	--
Clock Sync:	No
Synchronous Rectifier:	No
Duty Cycle (Max):	--
Series:	--
Voltage - Supply (Vcc/Vdd):	2.75 V ~ 9.8 V
Output Phases:	1
Number of Outputs:	1
Topology:	Boost
Output Configuration:	Positive
Function:	Step-Up
Output Type:	Transistor Driver
Part Status:	Active
Packaging:	Tape & Reel (TR)

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LTC3872ITS8-1#TRMPBF Application Field and Working Principle

PMIC (Power Management IC) is an important element in the field of power management for integrated circuits (IC). PMIC typically contains several types of power management and energy conversion components, such as switches, linear regulators, switching regulators, power factor controllers and protection circuits. Among them, voltage regulators are a crucial part of providing a stable power source that powers various components across various systems. Voltage regulators have several types of variations and features based on their application fields, such as low drop out regulators, fast transient response regulators and DC DC switching controllers.The LTC3872ITS8-1#TRMPBF is a PWM synchronous step-down DC/DC switching controller, manufactured by Linear Technology. It is a high performance, synchronous, switching voltage regulator that delivers high efficiency, flexibility and accuracy. This part is especially suited for powering system voltages with up to 6V or 8V outputs while operating from an input supply of up to 36V.This DC/DC switching controller operates in both continuous and discontinuous conduction modes, allowing it to be used in multiple application fields. It has a built-in current sense amplifier and high-side MOSFET driver to reduce power supply design complexity. This feature also simplifies operation and makes LTC3872 suitable for standard and critical load applications.The main features of LTC3872 include high-performance voltage regulation, wide input voltage range, current mode operation, internal clock oscillator, Low-Power Shutdown/Sleep Mode, programmable power loss detection second-level sequencing, spread spectrum, under-voltage lockout, and over-current limiting. It also has auto-restart for short-circuit and over-temperature protection.The regulator works in current-mode control, with a single-ended clock input option. A programmable oscillator frequency allows for frequency jitter to reduce conducted and radiated emissions. The LTC3872 has an internal phase-lock loop frequency-foldback capability that can reduce the frequency and system power consumption. The controller also has variable frequency peak current mode control to reduce acoustic noise and ripple.The power stage of the LTC3872 has two independent channels, allowing it to be used for dual outputs. It has an integrated current sense amplifier for easy sensing of current in each channel. An internal clock oscillator is used for PWM switching, and an external-clock option is available for synchronization purposes. It has an adaptive on-time control with frequency dithering that provides a good compromise between high efficiency and fast transient response.The current mode control with variable-frequency oscillation allows the regulator to operate with using any type of inductor. The low-power sleep mode reduces power consumption in low load applications, while the power loss detection control eliminates the need for a reset circuit.Overall, the LTC3872ITS8-1#TRMPBF isan excellent DC/DC switching controller suitable for many applications. Its wide input voltage range, high-performance voltage regulation, low-power sleep mode, and other features make it a reliable and cost-effective solution for many types of systems. The LTC3872 is an ideal choice to ensure a stable voltage supply and maximum efficiency in multiple system designs.

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