LT3970IDDB#TRMPBF

Voltage - Output (Min/Fixed):	1.21V
Base Part Number:	LT3970
Supplier Device Package:	10-DFN (3x2)
Package / Case:	10-WFDFN Exposed Pad
Mounting Type:	Surface Mount
Operating Temperature:	-40°C ~ 125°C (TJ)
Synchronous Rectifier:	No
Frequency - Switching:	200kHz ~ 2.25MHz
Current - Output:	535mA (Switch)
Voltage - Output (Max):	25V
Series:	--
Voltage - Input (Max):	40V
Voltage - Input (Min):	4.2V
Number of Outputs:	1
Output Type:	Adjustable
Topology:	Buck
Output Configuration:	Positive
Function:	Step-Down
Part Status:	Active
Packaging:	Tape & Reel (TR)

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Introduction

The LT3970IDDB#TRMPBF is a DC/DC Switching Regulator from Linear Technology Corporation. It is a low-dropout linear regulator, designed specifically for high-efficiency, low-current applications. The device is ideal for battery-powered applications, where the output voltage range is 5.6V to 24V.

Applications

The LT3970IDDB#TRMPBF is suitable for a wide range of applications, such as portable electronics, automotive, and industrial control. Uses include battery-powered equipment, LCD displays, embedded processors and microcontrollers, medical monitoring and test equipment, instrumentation, and lighting applications. It can also be used in automotive applications such as automotive starter systems, LED drivers, power supplies, and DC motor drivers.

Working Principle

The LT3970IDDB#TRMPBF is an advanced DC/DC Switching Regulator. Its main components are a voltage sensing input circuit, a high-current linear regulator, a switching power supply, and a low-dropout linear regulator. The device utilizes two separate regulating inputs, an internal reference voltage and an external signal, to achieve high accuracy and low noise.The voltage sensing input circuit senses the input voltage and maintains a constant voltage level. The high-current linear regulator reduces the voltage to a predetermined level. The low-dropout linear regulator then further reduces the output voltage to the predetermined level.The switching power supply is used to provide a constant voltage once the voltage reaches the predetermined level. The switching frequency is determined by the maximum input voltage, the output voltage, and the reference. It is adjustable, allowing for flexibility in tuning the device for optimum performance.The LT3970IDDB#TRMPBF also features a low-ESR bypass capacitor, which reduces output noise and ripple. The capacitor reduces voltage ripple at high load transients, helping to maintain a stable output voltage.

Conclusion

The LT3970IDDB#TRMPBF is a high-efficiency, low-noise DC/DC switch regulator from Linear Technology Corporation. It is ideal for battery-powered applications, where the output voltage range is 5.6V to 24V. The device utilizes two separate regulating inputs, an internal reference voltage and an external signal, to achieve high accuracy and low noise. It features a low-ESR bypass capacitor to reduce output noise and ripple, and has adjustable switching frequency, making it ideal for a variety of applications.

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