LTC3896EFE#TRPBF

Frequency - Switching:	50kHz ~ 900kHz
Base Part Number:	LTC3896
Supplier Device Package:	38-TSSOP-EP
Package / Case:	38-TFSOP (0.173", 4.40mm Width), 31 Leads, Exposed Pad
Operating Temperature:	-40°C ~ 125°C (TJ)
Control Features:	Current Limit, Enable, Frequency Control, Phase Control, Power Good, Soft Start
Serial Interfaces:	--
Clock Sync:	No
Synchronous Rectifier:	No
Duty Cycle (Max):	99%
Series:	--
Voltage - Supply (Vcc/Vdd):	4 V ~ 140 V
Output Phases:	1
Number of Outputs:	1
Topology:	Buck-Boost
Output Configuration:	Negative
Function:	Step-Up/Step-Down
Output Type:	Transistor Driver
Part Status:	Active
Packaging:	Tape & Reel (TR)

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The LTC3896EFE#TRPBF, or Linear Technology Corporation 3896EFE DC-DC controller, is a monolithic synchronous buck switch mode power supply controller that is specifically designed to maintain precision voltage regulation and excellent dynamic response in a wide variety of industries, applications and systems.The LTC3896EFE#TRPBF is used as a power supply controller to reduce the overall system cost by reducing component count and board area by increasing efficiency and reducing switching losses. It is also capable of providing up to 92% efficiency. This makes it a viable and cost-effective solution for applications such as notebook and netbook power supplies, telecom power supplies, telecom/wireless LAN power systems, automotive on-board chargers and many more.The LTC3896EFE#TRPBF offers a high-precision, low-output voltage ripple and a wide operating frequency range from 150kHz to 2MHz, allowing for an optimized solution for a wide variety of applications. The controller also features a simple start-up circuitry for voltage tracking, precision error-amplifier, tightly regulated output voltage, programmable soft-start, internal over-voltage and under-voltage protection circuits as well as a low quiescent current of 1.6mA.The LTC3896EFE#TRPBF also supports a wide range of input voltages, up to 22V, and can be calibrated in order to accommodate a wide range of output voltages. In addition to the above mentioned features, the LTC3896EFE#TRPBF also has 3.3V and 5V power On/Off logic, two PWM/Ramp inputs, soft-start and pre-bias voltage. The integrated current sensing circuitry and digital control loop ensure excellent line and load regulation and fast transient response, as well as an adjustable current limit and a complete protection mechanism against a wide range of under-voltage and over-voltage conditions.In terms of its working principle, the LTC3896EFE#TRPBF controller consists of an integrated circuit (IC) synchronized by an external clock. When the external clock turns on, the IC switches the output voltage to provide a regulated power supply. The switching is based on the input voltage, output current and the external clock. the IC uses the internal voltage error amplifier and the feedback voltage to maintain a precise regulated output voltage. The IC also integrates a digital control loop, current sense circuit to prevent over-current and other protective circuits.In summary, the LTC3896EFE#TRPBF DC-DC Controller is a monolithic synchronous buck switch mode power supply controller that is specifically designed to maintain precision voltage regulation, dynamic response and overall system cost reduction in a wide variety of industries, applications and systems. This makes it a perfect choice for applications such as notebook and netbook power supplies, telecom power supplies, telecom/wireless LAN power systems, automotive on-board chargers and many more.

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