LTC3542EDC#TRMPBF

LINEAR TECHNOLOGY  LTC3542EDC#TRMPBF  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, 0.5A输出, DFN-6

The is a high-efficiency monolithic synchronous Buck Converter using a constant frequency and current-mode architecture. Supply current during operation is only 26µA, dropping to <1µA in shutdown. The 2.5 to 5.5V input voltage range makes the LTC3542 ideally suited for single Li-ion battery-powered applications. 100% duty cycle provides low dropout operation, extending battery life in portable systems. The output voltage is adjustable from 0.6V to VIN. Internal power switches are optimized to provide high efficiency and eliminate the need for an external Schottky diode. Switching frequency is internally set at 2.25MHz, allowing the use of small surface mount inductors and capacitors and it can synchronize to an external clock signal with a frequency range of 1 to 3MHz through the MODE/SYNC pin. The LTC3542 is specifically designed to work well with ceramic output capacitors, achieving very low output voltage ripple and a small PCB footprint.

.

No schottky diode required

.

Internal soft-start limits inrush current

.

Current-mode operation for excellent line and load transient response

.

Over-temperature protection

.

Low output ripple <20mVP-P typical

.

Up to 96% high efficiency

.

1 to 3MHz External frequency synchronization

.

0.6V Reference allows low output voltage

.

±2% Output voltage accuracy