LTC3543EDCB#PBF

LINEAR TECHNOLOGY  LTC3543EDCB#PBF  直流-直流开关降压逐步递减稳压器, 可调, 2.5V-5.5V输入, 600mV-5.5V输出, 0.6A输出, DFN-6

The is a high-efficiency monolithic synchronous current-mode Buck Regulator with soft-start function and spread spectrum. The switching frequency is internally set at 2.25MHz, allowing the use of small surface mount inductors and capacitors. In PLL mode, the LTC3543 can acquire frequency between 1 and 3MHz. Also, the LTC3543 has spread spectrum capability providing a lower noise regulated output, as well as low noise at the input. In Burst Mode® operation, the supply current is only 45µA, dropping to <1µA in shutdown. The 2.5 to 5.5V input voltage range makes the LTC3543 ideally suited for single Li-ion battery-powered applications. The 100% duty cycle provides a low dropout operation, extending the battery life in portable systems. Burst Mode® operation increases efficiency at light loads, further extending battery life. The internal synchronous switch increases efficiency and eliminates the need for an external Schottky diode.

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No Schottky diode required

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Over-temperature protection

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Stable with ceramic capacitor

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Current-mode operation for excellent line and load transient response

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Up to 95% high efficiency

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1A Peak inductor current

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±2% Output voltage accuracy