LTC3546IUFD#PBF

LTC3546 is a dual, constant-frequency, synchronous step down DC/DC converter for medium power applications. Supply operation is from 2.3V to 5.5V. The switching frequency can be set to 2.25MHz, adjustable from 0.75MHz to 4MHz, or synchronized to an external clock. Internal synchronous low RDS(ON) power switches provide high efficiency without external Schottky diodes. User-selectable modes (Burst Mode® operation, pulse skipping and forced continuous) allow a trade-off between ripple noise and power efficiency. Burst Mode operation provides high efficiency at light loads. Pulse-skipping mode provides low ripple noise at light loads. It is widely used in application such as netbooks/ultra-mobile PCs, PC cards, wireless and DSL modems, point of load DC/DC conversion etc.

• Input voltage range is 2.3V to 5.5V
• Output voltage range is 0.6V to 5V
• High efficiency upto 96%
• No schottky diodes required, short-circuit protected
• Current mode operation for excellent line and load transient response
• Ultralow shutdown current is 1µA maximum
• Low dropout operation is 100% duty cycle, power good output for each channel
• External or internal soft-start or supply tracking
• Operating temperature is -40°C to 125°C
• Package style is 28-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