LT3690MPUFE#PBF

LT3690 is a adjustable frequency monolithic buck switching regulator. A high efficiency 90m ohm switch is included on the device along with the boost diode and the necessary oscillator, control, and logic circuitry. The internal synchronous power switch of 30m ohm increases efficiency and eliminates the need for an external Schottky catch diode. Current mode topology is used for fast transient response and good loop stability. This device features robust operation and is easily configurable. Using a resistor divider on the UVLO pin provides a programmable undervoltage lockout. A power good flag signals when VOUT reaches 90% of the programmed output voltage. Protection circuitry senses the current in the power switches to protect the device against short-circuit conditions. Frequency foldback and thermal shutdown provide additional protection. It is used in application such as automotive systems, industrial supplies, distributed supply regulation etc.

• Wide input voltage range is 3.9V to 36V
• Overvoltage lockout protects circuits through 60V transients
• 4A maximum output current
• Low ripple is <lt/>15mVP-P at Burst Mode® Operation, BST pin current is 70mA typical
• Programmable input undervoltage lockout
• 0.8V feedback reference voltage
• Output voltage is 0.8V to 20V
• Programmable and synchronizable oscillator is 170KHz to 1.5MHz
• Soft-startup and output voltage tracking, short-circuit robust, power good flag
• Operating temperature is -55°C to 150°C, packaging style is 26-lead plastic QFN

Notes

ADI products are only authorized (and sold) for use by the customer and are not to be resold or otherwise passed on to any third party