LTC3728EUH#TRPBF

Frequency - Switching:	260kHz ~ 550kHz
Base Part Number:	LTC3728
Supplier Device Package:	32-QFN (5x5)
Package / Case:	32-WFQFN Exposed Pad
Operating Temperature:	-40°C ~ 85°C (TA)
Control Features:	Enable, Power Good, Soft Start
Serial Interfaces:	--
Clock Sync:	No
Synchronous Rectifier:	Yes
Duty Cycle (Max):	99.4%
Series:	--
Voltage - Supply (Vcc/Vdd):	3.5 V ~ 30 V
Output Phases:	2
Number of Outputs:	2
Topology:	Buck
Output Configuration:	Positive
Function:	Step-Down
Output Type:	Transistor Driver
Part Status:	Active
Packaging:	Tape & Reel (TR)

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LTC3728EUH#TRPBF Application Field and Working PrincipleLTC3728EUH#TRPBF is a high performance integrated DC-DC buck controller, specially designed for cost-sensitive applications. It is a cost-efficient alternative for applications where an external MOSFET or SPDT switch is not used. The device offers a wide operating range of 9V to 60V and can be used in a variety of DC-DC buck converter applications.Application FieldThe LTC3728EUH#TRPBF can be used in low power, off-line power supplies, as well as in many other applications. Its small size, low cost and wide operating voltage range make it a good option for battery powered applications. It is suitable for applications such as industrial control systems, communication systems, consumer electronics, and embedded systems.The device\'s integrated dual current-mode controller design, combined with advanced MOSFET driver, helps enable a high switching frequency for a smaller sized solution. This small size and advanced feature set enable a high efficiency and reduced noise in a wide variety of applications. Working PrincipleThe device incorporates a high-voltage N-Channel MOSFET and driver, as well as a high-speed, dual-mode current-mode controller. It operates over a wide input voltage range of 9V-60V and provides adjustable output current and voltage.The device operates in pulse width modulation (PWM) mode for continuous load regulation. The user can select PWM mode of operation either by adjusting the mode select pin or jumper. The mode select pin can also be used to select a proportional-integral (PI) control mode. The current limit circuit shuts down the device when the output current reaches a predetermined level.The MOSFET driver is designed to drive the power switch at high frequency with minimal switching losses. The high-frequency switching enables fast dynamic load response and reduced component size for cost savings.The integrated dual current-mode controller provides improved transient response and load regulation on a range of output voltages. The device is designed to run at a fixed switching frequency of up to 500kHz, and it also features adjustable switching frequency and soft start.The LTC3728EUH#TRPBF also provides adjustable under-voltage and over-voltage protection, as well as thermal and short-circuit protection. The device is available in a compact 6-pin SOT-23 package, making it suitable for applications with limited board space.In summary, the LTC3728EUH#TRPBF is a high performance integrated DC-DC buck controller that is suitable for low power, off-line power supplies, as well as industrial control systems, communication systems, consumer electronics, and embedded systems. The device is designed to provide adjustable output current and voltage over a wide operating range with fast dynamic load response and reduced component size for cost savings. It also offers under-voltage and over-voltage protection, as well as thermal and short-circuit protection.

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