MIC23250
4MHz Dual 400mA Synchronous Buck
Regulator with HyperLight Loadв„ў General Description Features The MIC23250 is a high efficiency 4MHz dual 400mA Input voltage: 2.7V to 5.5V
HyperLight Loadв„ў
synchronous buck regulator with HyperLight Loadв„ў mode. Dual output current 400mA/400mA
HyperLight Loadв„ў provides very high efficiency at light Up to 94% peak efficiency and 85% efficiency at 1mA
loads and ultra-fast transient response which is perfectly 33ВµA dual quiescent current
suited for supplying processor core voltages. An additional 1ВµH inductor with a 4.7ВµF capacitor
benefit of this proprietary architecture is very low output 4MHz in PWM operation
ripple voltage throughout the entire load range with the use
of small output capacitors. The fixed output MIC23250 has Ultra fast transient response
a tiny 2mm x 2mm Thin MLFВ® package that saves Low voltage output ripple
precious board space by requiring only 6 additional 20mVpp in HyperLight Loadв„ў mode
external components to drive both outputs up to 400mA 3mV output voltage ripple in full PWM mode
each. 0.01ВµA shutdown current
The device is designed for use with a 1ВµH inductor and a Fixed output:10-pin 2mm x 2mm Thin MLFВ®
4.7ВµF output capacitor that enables a sub-1mm height. Adjustable output:12-pin 2.5mm x 2.5mm Thin MLFВ®
The MIC23250 has a very low quiescent current of 33µA –40°C to +125°C junction temperature range
with both outputs enabled and can achieve over 85%
efficiency at 1mA. At higher loads the MIC23250 provides a
constant switching frequency around 4MHz while providing
Applications
peak efficiencies up to 94%. Mobile handsets …