LT1372IN8#PBF

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LT1372IN8#PBF DC/DC Switching Regulators

LT1372IN8#PBF is a high efficiency controller/transistor for DC/DC switching regulators. It is a three-terminal integrated circuit capable of supplying up to 1.5 A of output current.

Theinternal MOSFET switch allows up to 95 % efficiency, thus making a verycompact, low component-count regulation solution. It features soft-start, enable, over-temperature, over-voltageand shutdown control.

Applications

• Portable Equipment
• Battery-Operated Systems
• Cordless Telephones
• Power Supplies
• LED Lighting

Working Principle

The LT1372IN8#PBF works with an internal MOSFET switch. A control circuit sets the switching frequency and can follow an external voltage reference. This reference voltage is set by an external resistor divider network, which is connected to the Reference pin. The switching frequency can be adjusted by selecting an external capacitor connected to the Frequency Adjust pin.

The LT1372IN8#PBF also includes thermal shutdown and overvoltageprotection. When the die temperature increases over the thermal shutdown threshold, the circuit shuts down, preventing damage caused by excessive energy dissipation. This feature is activated by an internal thermal sense, eliminating the need of an external sense resistor.

The external MOSFET switch is driven by the voltage amplifier inside the LT1372IN8#PBF, which enhancesthe efficiency of the whole system and increases the output current.Thedrive circuit also guarantees zero-voltage transition (ZVT) and zero-currenttransition (ZCT) and maintains the optimal slope during the switchingprocess.

Conclusion

LT1372IN8#PBF is a three-terminal integrated circuit capable of supplying up to 1.5A of output current. It is a high efficiency controller/transistor for DC/DC switching regulators with adaptive slopes for ZVT/ZCT transitions and available internal temperature sensing and overvoltage protection. This product is suitable for applications such as portable equipment, battery-operated systems, cordless phones, power supplies, and LED lighting.

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