LT3970EDDB#TRMPBF

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Introduction to LT3970EDDB#TRMPBF Application Field and Working Principle

LT3970EDDB#TRMPBF is a high power PMIC DC/DC switching regulator. It is designed to deliver cost-effective, efficient, and reliable power for systems requiring up to 8A output. It is ideal for applications requiring high power output like battery-driven electronics, industrial motor control, and motor speed control. The device features an integrated low-dropout regulator that consumes much less power than traditional solutions. It is designed with a constant-voltage and constant-current switching architecture to maximize efficiency. The flexibility of the regulator architecture allows it to be used in both isolated and non-isolated DC/DC convertors.

Features

• 8A Output current
• Internal compensation
• Frequency synchronization
• On-chip Synchronous Rectification
• Input up to 42V
• 60mΩ N-channel MOSFETs
• Built-in Under-voltage Lockout (UVLO)
• Pulse-by-Pulse and Cycle-by-Cycle Current limit
• Thermal Shutdown Protection
• 10μA Supply Current at No Load

Working Principle

The LT3970EDDB#TRMPBF is a high power DC/DC switching regulator that uses a synchronous rectification scheme to convert input voltage to an output voltage. It starts operating when a high voltage is supplied to its input terminal. The voltage is passed through an input current limit circuit, an under-voltage lockout (UVLO) circuit, an enable/disable circuit, and an over-voltage protection circuity before reaching the controller. The controller senses the input voltage and compares it to a reference voltage. When the voltage drops below the reference voltage, the controller turns off the external n-channel power MOSFETs (switch) and begins to discharge the output capacitor. When the voltage is above the reference voltage, the controller turns on the power MOSFETs and transfers energy from the input to the output through the inductor. The LT3970EDDB#TRMPBF also features forced PBYP current limit, cycle-by-cycle current limit, and thermal shutdown protection for maximum safety.

Conclusion

The LT3970EDDB#TRMPBF is a high power PMIC DC/DC switching regulator designed for applications requiring up to 8A output current. The device features a synchronous rectification scheme, an input current limit circuit, an under-voltage lockout (UVLO) circuit, an enable/disable circuit, and an over-voltage protection circuity. It also offers built-in safety features like forced PBYP current limit, cycle-by-cycle current limit, and thermal shutdown protection. This makes the LT3970EDDB#TRMPBF an ideal choice for applications requiring high power output and high efficiency.

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