Datasheet Microchip MIC23158 — 数据表

MIC23158/9
3MHz PWM Dual 2A Buck Regulator with
HyperLight LoadпЈЁ and Power Good General Description Features The MIC23158/9 is a high-efficiency, 3MHz, dual, 2A
synchronous buck regulator with HyperLight LoadпЈЁ mode,
power good output indicator, and programmable soft start.
The MIC23159 also provides an auto discharge feature
that switches in a 225Ω pull down circuit on its output to
discharge the output capacitor when disabled. HyperLight
Load provides very high efficiency at light loads and ultrafast transient response which makes the MIC23158/9
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 20-pin 3mm x 4mm
В®
MLF package saves precious board space and requires
seven external components for each channel.
The MIC23158/9 is designed for use with a very small
inductor, down to 0.47ВµH, and an output capacitor as small
as 2.2ВµF that enables a total solution size, less than 1mm
in height.
The MIC23158/9 has a very low quiescent current of 45ВµA
and achieves a peak efficiency of 94% in continuous
conduction mode. In discontinuous conduction mode, the …