LT3972IDD#PBF

Voltage - Output (Min/Fixed):	0.79V
Base Part Number:	LT3972
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:	230kHz ~ 2.45MHz
Current - Output:	3.5A
Voltage - Output (Max):	30V
Series:	--
Voltage - Input (Max):	33V
Voltage - Input (Min):	3.6V
Number of Outputs:	1
Output Type:	Adjustable
Topology:	Buck
Output Configuration:	Positive
Function:	Step-Down
Part Status:	Active
Packaging:	Tube

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Introduction to LT3972IDD#PBF

The LT3972IDD#PBF is a 20V DC-DC switching regulator IC that is designed to provide the flexibility and efficiency needed for modern, low-power applications. This IC is capable of delivering up to 3A output current and has a wide operating range, making it suitable for a variety of power control applications.The LT3972IDD#PBF is a unique CMOS device, combining a variable frequency, variable duty cycle pulse width modulator (PWM) with an enhanced fixed frequency, variable duty cycle synchronous switching FET driver. The result is a power control solution that provides excellent crossover performance, fast transient response, and low spread noise.

Application Field

The LT3972IDD#PBF is primarily used in DC-DC switching regulator and power supply applications, including high-efficiency switching mode power supplies and DC-DC converters for cellular phones, portable computers, and other digital devices. This LTC device is also used in automotive and industrial applications, and even renewable energy applications.The DC-DC switching regulator converts a DC input voltage to a different DC voltage, typically via the use of inductors and capacitors. The LT3972IDD#PBF offers the flexibility and efficiency required for low-power applications, providing control of the output voltage in order to achieve adjustments in power consumption and performance. By using a high-efficiency switching regulator, these adjustments can be made without sacrificing system reliability.

Working Principle

The LT3972IDD#PBF is an advanced DC-DC voltage regulator that uses Pulse Width Modulation (PWM) to control the output voltage. The PWM method is versatile, allowing the device to maintain a smooth, adjustable output voltage over a wide range of input current and voltage levels.The LT3972IDD#PBF employs a closed-loop feedback topology that is based on the regulating effect of PWM. When the output voltage falls below a predefined value, the PWM Signal increases the frequency and duty cycle of the PWM impulses, driving the output voltage up. Conversely, when the output voltage rises above the desired level, the PWM Signal decreases the frequency and duty cycle of the PWM impulses, thus driving the output voltage down.The LT3972IDD#PBF integrates an improved FET driver which allows for faster switching operation, improved ripple rejection and better transient response than previous-generation parts. This FET driver also allows the device to operate with a wide variety of operatingtopologies.In summary, the LT3972IDD#PBF is an advanced dc-dc switching regulator IC that is designed to provide the flexibility and efficiency needed for low-power applications. It leverages the regulating effect of PWM to maintain a smooth and adjustable output voltage, and its improved FET driver ensures fast switching operation, improved ripple rejection and better transient response compared to previous-generation parts.

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