LT8277RUDCM#WPBF

LT8277RUDCM#WPBF is a multiphase current mode step-up DC/DC controller. It is a 2-phase constant frequency, current mode boost, and SEPIC controller that drives N-channel power MOSFETs. The 2-phase interleaved operation reduces system filtering capacitance requirements. An internal LDO regulator draws power from VIN or VOUT to provide a 5V supply for the gate drivers. The fixed frequency, current-mode architecture results in stable operation over a wide range of supply and output voltages. The operating frequency of the device can be set over a 100KHz to 2MHz range with an external resistor or can be synchronized to an external clock using the SYNC pin. The CLKOUT and SYNC pins allow multiple device devices to work together, e4nabling 4- or 8-phase operation. A window comparator on the VOUT pin reports via the PGOOD pin, providing an output voltage status indication. It is used in applications such as automotive, telecom, and industrial power supplies.

• Wide input voltage range from 3V to 40V
• 2-phase interleaved operation reduces input and output capacitance requirements
• SPI interface for output voltage adjustment, PGOOD output status reporting pin
• Frequency synchronization, clock output for 4- or 8-phase operation
• Spread spectrum frequency modulation (SSFM) for EMI reduction
• Switching frequency is 100KHz typical at (TA = 25°C, VIN = 12V, VENABLE = 12V)
• VIN pin quiescent current is 2mA typical at (TA = 25°C, VIN = 12V, VENABLE = 12V)
• VIN pin shutdown current is 15µA maximum at (TA = 25°C, VIN = 12V, VENABLE = 12V)
• AEC-Q100 qualified for automotive applications
• Operating temperature range from -40°C to 150°C, 20-lead QFN package

注释

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