LT1372CN8#PBF

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LT1372CN8#PBF Application Field and Working Principle

LT1372CN8#PBF is a high performance, high efficiency synchronous buck switching regulator designed for efficient power converters. It’s intended for use in DC-DC converter applications and is suitable for a variety of battery-powered and other portable applications.

LT1372CN8#PBF belongs to PMIC – Voltage Regulators – DC DC Switching Regulators. As a direct current (DC) to DC switching regulator, it integrates two high power switch FETs that enable it to provide up to 6A continuous output current. It can support multiple output voltage applications and the output voltage is adjustable from 0.75V to 6V.

The LT1372CN8#PBF features many features and benefits:

• 3 MHz Constant Frequency Current Mode PWM Control
• High Efficiency Synchronous FET Output
• Wide Voltage Input Range: 2.5V to 28V
• 1.2V Internal Reference; 0.6V to 6V Output Voltage Range
• Programmable Current Sense Level and Overcurrent Protection
• Soft-Start, Automatic PWM/PFM Mode Selection
• Integrated Output Disconnect  as an Enable Function
• Output Voltage Margining
• Adjustable Frequency: 250 kHz to 3 MHz

The general operational model of the LT1372CN8#PBF involves a pulse width modulator (PWM) that generates using a dithered triangle comparator waveform in order to control the inductor current. The output voltage is then regulated by comparing the inductor current to a voltage reference. This approach allows for efficient transfer of energy from the input to the output.

The LT1372CN8#PBF can also operate in a fixed-frequency current-mode PWM control mode. It runs in PWM mode at high loads and in PFM mode at low loads. This mode improves the efficiency of the transfer of power from the input to the output. The PWM mode runs at a frequency twice the PFM mode frequency in order to minimize output voltage ripple.

The LT1372CN8#PBF also includes a wide range of protection features to ensure its durability and safe operation. It has an input voltage undervoltage lockout (UVLO), an overcurrent protection that limits the output current and shuts down the circuit, a thermal shutdown that protects the regulator against overheating, and an output short circuit protection. In addition, it provides a power good indicator that signals when the output voltage is within its operating range.

The LT1372CN8#PBF can be used in a variety of applications, ranging from handheld devices and point-of-load converters to automotive and industrial systems. It is a versatile switching regulator that is suitable for a wide range of DC-DC converter applications.

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