LTC3546IFE#PBF

LINEAR TECHNOLOGY  LTC3546IFE#PBF  芯片, 降压稳压器, 同步, 双路, 2A, 28TSSOP

The is a dual constant-frequency, synchronous step down DC/DC Converter for medium power applications. The design consists of 2A and 1A primary output switches. In addition to the 2A/1A capability, a 1A dependent output switch can be externally connected to either of the primary outputs to produce 3A/1A dual regulator or 2A/2A dual regulator configurations. The switching frequency can be set to 2.25MHz, adjustable from 0.75MHz to 4MHz or synchronized to an external clock. Each output is adjustable from 0.6 to 5V and has output tracking on power-up. 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.

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No Schottky diodes required

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Short-circuit protected

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Current mode operation for excellent line and load transient response

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Low ripple burst mode operation

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Power good output for each channel

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Externally or internally programmable burst level

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External or internal soft-start or supply tracking

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<1µA Ultra-low shutdown current

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100% Duty cycle low dropout operation