LT3973EDD-5#TRPBF

Voltage - Output (Min/Fixed):	5V
Base Part Number:	LT3973
Supplier Device Package:	10-DFN (3x3)
Package / Case:	10-WFDFN Exposed Pad
Mounting Type:	Surface Mount
Operating Temperature:	-40°C ~ 125°C (TJ)
Synchronous Rectifier:	No
Frequency - Switching:	195kHz ~ 2.15MHz
Current - Output:	750mA
Voltage - Output (Max):	--
Series:	--
Voltage - Input (Max):	42V
Voltage - Input (Min):	4.2V
Number of Outputs:	1
Output Type:	Fixed
Topology:	Buck
Output Configuration:	Positive
Function:	Step-Down
Part Status:	Active
Packaging:	Tape & Reel (TR)

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Introduction

The PMIC - Voltage Regulators - DC DC Switching Regulators market has been experiencing tremendous growth lately. The LT3973EDD-5#TRPBF is a mid-range switching regulator and high-value DC/DC converter, with high efficiency power and cost savings benefiting from its simple and reliable operation. It offers an extra pin option to enhance its regulation and enable a wide range of applications.

Application Field

The LT3973EDD-5#TRPBF is designed for many applications like power management, battery charging and DC/DC converters. It is suitable for both transient and constant current load applications. The device offers four control functions: voltage regulator, charge controller, inverter and DC/DC reference. It can be used in applications like industrial control systems, consumer electronics, consumer and computer power supplies, and automotive electronics.The LT3973EDD-5#TRPBF has a wide input voltage range of 4.5 V to 36 V with a regulated output voltage range of 0.8 V to 12 V. The device includes an on-board feedback divider for adjustable output. Its switching frequency can be adjusted up to 6 MHz and it has a continuous output current of up to 4 A. This regulator is also able to run in low standby power modes.

Working Principle

The LT3973EDD-5#TRPBF provides a high-power, compact switching regulator. The basic operating principle involves a comparator, switching transistor and a sense resistor for reference current control. The device starts by setting the switch to the on condition. The sensed voltage across the sense resistor is compared to a reference voltage and if the voltage exceeds the reference voltage, the switch is then switched to the off condition, stopping the switching cycle. When the voltage across the sense resistor is equal to the reference voltage, then the switch is turned back on and the cycle is repeated. This process ensures a regulated output voltage.The LT3973EDD-5#TRPBF also includes two current limit pins that allow for a programmable current limit point. This allows the device to limit the amount of current flowing through its output pin in the event of an overload.

Conclusion

The LT3973EDD-5#TRPBF is a powerful, cost-effective switching regulator and high-value DC/DC converter. With its wide input range, adjustable frequency, and its current-limited with overload protection, this device is perfect for many industrial control, consumer electronics, consumer and computer power supply and automotive electronics applications.

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