LT8709EFE#PBF

Series:	--
Packaging:	Tube
Part Status:	Active
Output Type:	Transistor Driver
Function:	Step-Up, Step-Down, Step-Up/Step-Down
Output Configuration:	Positive or Negative
Topology:	Buck, Boost, Buck-Boost
Number of Outputs:	1
Output Phases:	1
Voltage - Supply (Vcc/Vdd):	-4.5 V ~ -80 V
Frequency - Switching:	100kHz ~ 750kHz
Duty Cycle (Max):	--
Synchronous Rectifier:	Yes
Clock Sync:	Yes
Serial Interfaces:	--
Control Features:	Enable, Frequency Control, Power Good, Soft Start
Operating Temperature:	-40°C ~ 125°C (TJ)
Package / Case:	20-TSSOP (0.173", 4.40mm Width) Exposed Pad
Supplier Device Package:	20-TSSOP-EP
Base Part Number:	LT8709

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LT8709EFE#PBF is a DC DC switching controller. It is one of the PMIC - Voltage Regulators - DC DC Switching Controllers available on the market and is designed to provide a simple and reliable solution for the interconnection of the DC voltage sources or voltage sources and power levels, like power modules and other energy storage elements. It provides efficient and economical solutions for different DC-DC voltage conversion applications.The LT8709EFE#PBF is designed to provide an optimal output voltage regulation with single-ended inter-rail connected power sources. It can also regulate the output current and power in case of multi-output application. It can provide a compact solution for inter-rail voltage regulation and safe power distribution.The LT8709EFE#PBF comes with integrated Pulse-Width Modulation (PWM) and fixed frequency modulation (FFM). The PWM output frequency is determined by a frequency select pin. It also features a built-in short circuit protection and overcurrent protection.In terms of its application field, it is mainly used for establishing safe, efficient and reliable communication between the DC voltage sources and other DC load elements. The controller can be used for switched-mode power supplies, high-power modules, DC/DC converters and other DC/DC interconnection circuits. It is suitable for different types of power levels, like power modules and other energy storage elements.The working principle of the LT8709EFE#PBF is based on the Pulse-Width Modulation (PWM) and fixed frequency modulation (FFM). The PWM output frequency is determined by a frequency select pin. The PWM frequency can be set between 0.75kHz to 30kHz. Furthermore, this controller has a voltage and current programming block, which provides a means to control the output current and/or output voltage. The LT8709EFE#PBF includes a voltage sensing circuit, which is used to regulate the output voltage. The internal PWM frequency is then regulated to control the output voltage.The LT8709EFE#PBF also features two operating modes, active and standby. The active mode is for normal operation and it involves measuring the output voltage and providing the optimum current to achieve the desired set point. Conversely, the standby mode is for low power consumption. The standby current of the device is extremely low and it is used to maintain the internal circuitry of the controller. The LT8709EFE#PBF also has a Thermal Protection Unit (TPU). It is responsible for monitoring the junction temperature of the controller and triggering a shut-down sequence when the specified temperature is exceeded. This ensures the controller is not damaged due to high temperature conditions.In compliance with the electrical and environmental specifications, the LT8709EFE#PBF is designed to be extremely reliable in long-term operation. The product is rated for industrial temperature range, which makes it highly suitable for various DC-DC switch-mode power supplies and DC-DC interconnection applications under harsh environmental conditions.The LT8709EFE#PBF is a versatile and cost-effective DC-DC switching controller. It is capable of providing a simple and reliable solution for the interconnection of the DC voltage sources or voltage sources and power levels. Furthermore, it is rated for industrial temperature range, making it suitable for DC-DC switch-mode power supplies, DC-DC converters and other DC/DC interconnection circuits.

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