LTC3891HFE#TRPBF

Frequency - Switching:	105kHz ~ 835kHz, 350kHz ~ 535kHz
Base Part Number:	LTC3891
Supplier Device Package:	20-TSSOP-EP
Package / Case:	20-TSSOP (0.173", 4.40mm Width) Exposed Pad
Operating Temperature:	-40°C ~ 150°C (TJ)
Control Features:	Current Limit, Enable, Frequency Control, Power Good, Soft Start, Tracking
Serial Interfaces:	--
Clock Sync:	No
Synchronous Rectifier:	Yes
Duty Cycle (Max):	99%
Series:	--
Voltage - Supply (Vcc/Vdd):	4 V ~ 60 V
Output Phases:	1
Number of Outputs:	1
Topology:	Buck
Output Configuration:	Positive
Function:	Step-Down
Output Type:	Transistor Driver
Part Status:	Active
Packaging:	Tape & Reel (TR)

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LTC3891HFE#TRPBF is a high efficiency, low quiescent current, high frequency, synchronous dual-output dc-dc switching controller. This device is an extremely versatile IC that is used in a variety of applications including digital power systems for distributed power architectures, energy harvesting and digital point-of-load (POL) applications. It is also very suitable for automotive, industrial, medical and consumer applications.The LTC3891HFE#TRPBF is capable of driving two synchronous, buck or boost switching outputs with a single input power source, making it extremely desirable for system designs where two outputs are needed. It has a wide input voltage range, adjustable output voltage range, on-board spread spectrum for noise reduction, and pulse frequency modulation (PFM) mode for light load currents.The LTC3891HFE#TRPBF contains an integrated 100mV reference that allows it to drive two outputs independently. It also features a 3- channel, programmable current limit architecture, selectable soft/hard start/stop mode, and overvoltage protection (OVP) circuit to protect the outputs and the device itself.The LTC3891HFE#TRPBF utilizes an adaptive switching frequency technique to ensure optimal efficiency across a wide input/output voltage range. With a maximum switching frequency of up to 500kHz, it can provide higher switching frequencies than traditional dc-dc controllers. This allows for faster transient response, reduced noise, and improved light-load efficiency, which can reduce overall system costs by eliminating the need for external components such as EMI filters.The onboard clock oscillator for PFM mode can be programmed for up to 512KHz and allows for higher peak currents to be delivered at light load currents. This allows for improved efficiency and longer battery life, as well as improved system reliability and higher power density in smaller form factors.The LTC3891HFE#TRPBF also features an on-chip low dropout linear regulator (LDO) controller and an adjustable 2.5V reference that can be used in applications such as automotive head unit and multi-display systems.The LTC3891HFE#TRPBF is a highly integrated and efficient switched-mode power supply controller suitable for a wide range of applications. It allows designers to create optimal power management solutions with features such as pulse frequency modulation, adaptive switching frequency, and low quiescent current. This makes it an ideal choice for automotive, industrial, medical, and consumer applications.

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