LTC3522EUD#PBF

LTC3522 is a 400mA buck-boost DC/DC converter with a 200mA synchronous buck DC/DC converter. The 1MHz switching frequency minimizes the solution footprint while maintaining high efficiency. Both converters feature internal soft-start and compensation, simplifying the design process. The buck converter is current mode controlled and utilizes an internal synchronous rectifier for high efficiency. The buck converter supports 100% duty cycle operation to extend battery life. If the PWM pin is held low, the buck converter automatically transitions from Burst Mode operation to PWM mode. The buck-boost converter provides continuous conduction operation to maximize efficiency and minimize noise. At light loads, the buck-boost converter can be placed in Burst Mode operation to improve efficiency and reduce no-load standby current. It is used in application such as flash-based MP3 players, medical instruments, digital cameras, PDAs, handheld PCs, personal navigation devices etc.

• Input voltage range is 2.4V to 5.5V
• Pin selectable Burst Mode® Operation
• Independent power good indicator outputs
• Integrated soft-start, thermal and overcurrent protection
• Burst mode quiescent current is 25μA typical
• Quiescent current (shutdown) is 1μA maximum at (VSHDN1 = VSHDN2 = 0V)
• Power good outputs leakage is 10μA maximum at (VPGOOD1 = VPGOOD2 = 5.5V)
• Operating temperature is -40°C to 85°C
• Package style is 16-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