LTC1682IS8-5#TRPBF

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LTC1682IS8-5#TRPBF Application Field and Working Principle

Introduction: The LTC1682IS8-5#TRPBF is a synchronous switching regulator controller IC manufactured by Linear Technology. It is a monolithic DC/DC integrated circuit with on-chip MOSFETs which can implement non-isolated Step-Down switching regulators with excellent performance. This device is intended to help designers establish a reliable and low-cost power supply design with low noise, rapid transient response and low EMI.

Application Field:The LTC1682IS8-5#TRPBF is suitable for implementing buck DC-DC converters for a wide range of applications such as embedded systems, microprocessor regulated power supplies, telecom rectifiers, general-purpose power supplies, as well as applications which require low noise, low EMI and efficiency. Besides, the device can be used to drive two independent outputs using two MOSFETs or implemented in a current-mode system. The device is compatible with switching frequencies of up to 600 kHz.

Working Principle:The LTC1682IS8-5#TRPBF regulator requires just a few external components to create a buck converter. Internal circuitry controls the gate drive of the external switching MOSFET, which results in a regulated, fixed or adjustable output voltage. Operation begins with an external resistors/capacitors network for generating an oscillator frequency. This frequency is used by the controller to turn on the external MOSFET transistor conducting current to the output diode or Schottky diode which rectifies the duty cycle pulse. In normal operation the duty cycle is regulated by the LTC1682IS8-5#TRPBF, based on the feedback signal of the output voltage. Furthermore, the device ensures that the output voltage is within the preset tolerance. On the other hand, the device also provides overtemperature protection, cycle-by-cycle current limiting, and under-voltage lockout to protect the power supply.

Conclusion:In conclusion, the LTC1682IS8-5#TRPBF is a powerful DC/DC regulator integrated circuit featuring on-chip MOSFETs, low noise, fast transient response and low EMI. This device is suitable for a wide range of applications including embedded systems, microprocessor regulated power supplies, telecom rectifiers, and general-purpose power supplies. It can be used to drive two independent outputs using two MOSFETs, or implemented in a current-mode system. The device requires few external components to create a buck converter, and its internal circuitry controls the gate drive of the external MOSFET, resulting in a regulated, fixed or adjustable output voltage.

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