L6728AHTR

Frequency - Switching:	600kHz
Base Part Number:	L6728A
Supplier Device Package:	10-VFDFPN (3x3)
Package / Case:	10-VFDFN Exposed Pad
Operating Temperature:	-40°C ~ 125°C (TJ)
Control Features:	Enable, Phase Control, Power Good
Serial Interfaces:	--
Clock Sync:	No
Synchronous Rectifier:	Yes
Duty Cycle (Max):	67%
Series:	--
Voltage - Supply (Vcc/Vdd):	5 V ~ 12 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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Application field and Working principle of L6728AHTR

The L6728AHTR is a monolithic step-down DC-DC switch controller from ST Microelectronics specifically designed for automotive applications such as emergency vehicle lighting, driver assistance systems, climate control and ECU power management. The device is capable of supplying up to 5A outputs in automotive environments with temperatures ranging from -40°C to +125°C.The L6728AHTR is a high voltage, high efficiency and low noise step-down switching controller that provides clean, regulated and protected DC power across a wide range of input voltages, making it an ideal choice for automotive engineers seeking an efficient, reliable and compact power solution in space constrained applications.The device features a wide input range of 4.5V to 18V and is capable of delivering up to 5A of output. It includes multiple protection features such as overcurrent protection, thermal protection and UVLO, as well as a power-on reset and a soft-start circuit to prevent inrush current.The device uses a synchronous rectification topology, allowing it to achieve over 95% efficiency, while significantly reducing switching losses. The switching frequency of the device is adjustable from 250 kHz to 1.2 MHz, allowing the engineer to tailor the device to the application, while minimizing the size of external components.The L6728AHTR also provides excellent protection features which help to protect the device and the load, such as an output current limiting circuit, and a thermal protection circuit. The output current limit of the device is adjustable, allowing the engineer to tailor it to the application.In addition, the device includes a wide range of features for monitoring and control, such as undervoltage detection, overvoltage detection and over-temperature detection, which help ensure the safe and reliable operation of the application.The device is available in a compact, surface mount package, so it can be easily integrated into a wide range of automotive applications. It is also available with an optional I2C communications control interface, which makes it ideal for applications that require digital control.In conclusion, the L6728AHTR from ST Microelectronics is an ideal choice for automotive power solutions which require a high efficiency and flexible step-down regulator. Its wide range of features, protection and control makes it suitable for a variety of applications, while its small size, wide temperature range and high efficiency make it an excellent choice for automotive designers seeking a compact, reliable and efficient power solution.

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