LTC3788IGN-1#TRPBF

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LTC3788IGN-1#TRPBF is a high performance low noise, low power synchronous buck switching regulator controller incorporated by Linear technology. It has highest in class power efficiency and fast transient response. It comes in convenient, compact MSOP-10 package which requires a minimal number of small external components. It is suitable for high frequency image sensor based applications.

Application field

The LTC3788IGN-1#TRPBF is mainly used for high frequency and low noise differential sensing in image sensor based applications with buck topology. It also offers precise voltage regulation and fast transient response. This chip features a low current limit, which helps in restricting current in load supply and its high power efficiency makes it suitable for low power applications. It can be used in various other applications such as architectures requiring advanced power management, OLED display power supply and power measurement systems.

Working Principle

LTC3788IGN-1#TRPBF works on synchronous buck topology. It accepts input ranging from 3V to 21V and provides outputs from 0.6V to 20V. The operating frequency can be adjusted from 250kHz to 2.5MHz. It acts as both voltage regulator and switch controller. Its regulator mode requires less external components. Its auto-skip mode adjusts switching frequency when load is low to reduce switching loss. Its fast transient response is due to its internal regulation loop.

The LTC3788IGN-1#TRPBF comes with an integrated current limit feature, which helps in monitoring and limiting the current to the load. This feature is enabled when the input voltage is higher than 6.5V and disabled during brown-out or power up sequence. The brown-out protection feature helps in limiting the current to the regulator during startup, when the input voltage is below regulating voltage.

The LTC3788IGN-1#TRPBF works on the concept of 6 variable digital delays, which protects the chip against peak current and keeps the chip cool under continuous operation. It also has foldback current limit feature which prevents the chip from overheating during current overshoots due to sudden load increase. The softstart feature helps in controlling the output ramp rate thus preventing an abrupt output.

Conclusion

The LTC3788IGN-1#TRPBF synchronous buck switching regulator controller is compact and feature rich device. It is capable of providing precisely regulated outputs from 0.6V to 20V at adjustable frequencies from 250kHz to 2.5MHz. It is used in applications requiring advanced power management, such as image sensing, OLED display power supply and power measurement systems. It also has various protection features such as foldback current limit, auto-skip mode and 6 variable digital delays which makes it suitable for long continuous operation.

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