描述 Description

The MIC33153 is a high-efficiency 4MHz 1.2A synchronous buck regulator with an internal inductor, HyperLight Load? mode, Power Good (PG) output indicator, and programmable soft start. HyperLight Load? provides very high efficiency at light loads and ultra-fast transient response which makes the MIC33153 perfectly suited for supplying processor core voltages. An additional benefit of this proprietary architecture is very low output ripple voltage throughout the entire load range with the use of small output capacitors.The MIC33153 is designed so that only two external capacitors as small as 2.2 μF are needed for stability. This gives the MIC33153 the ease of use of an LDO with the efficiency of a HyperLight Load? DC converter. The MIC33153 achieves efficiency in HyperLight Load? mode as high as 85% at 1mA, with a very low quiescent current of 22μA. At higher loads, the MIC33153 provides a constant switching frequency up to 4MHz.The MIC33153 is available in 14-pin 3.0mm x 3.5mm package with an operating junction temperature range from -40°C to +125°C.

特性 Features

? Simplifies design to two external capacitors
? Input voltage: 2.7V to 5.5V
? Output voltage: fixed or adjustable (0.62V to 3.6V)
? Up to 1.2A output current
? Up to 93% peak efficiency
? 85% typical efficiency at 1mA
? Power Good (PG) output
? Programmable soft start
? 22μA typical quiescent current
? 4MHz PWM operation in continuous mode
? Ultra-fast transient response
? 35mVpp?ripple in HyperLight Load??mode
? 7mV output voltage ripple in full PWM mode
? 0.01μA shutdown current
? Thermal shutdown

簡介

MIC33153屬于電源-板安裝的直流轉(zhuǎn)換器。由制造生產(chǎn)的MIC33153直流轉(zhuǎn)換器一種旨在將直流電壓輸入電平改變?yōu)橐粋€或多個不同的直流電壓輸出電平的裝置。