Microchip MIC33050-AYHL-TR, 1 Buck Boost Switching, Buck/Boost Converter 600mA, 4 MHz 12-Pin, MLF

The MIC33050 is a high efficiency 600mA PWM synchronous buck (step-down) regulator with internal inductor featuring HyperLight Load®, a patent-pending switching scheme that offers best-in-class light load efficiency and transient performance while providing very small external components and low output ripple at all loads. The MIC33050 also has a very low typical quiescent current draw of 20μA and can achieve over 83% efficiency even at 1mA.

Input voltage range: 2.7V to 5.5V
Fixed output voltage options from 0.72V to 3.3V
Output current guaranteed up to 600mA
Ultra fast transient response
20μA typical quiescent current
4MHz in PWM in constant current mode
HyperLight Load® mode
No external inductor required
Low voltage output ripple
25mVpp in HyperLight Load®mode
3mV output voltage ripple in full PWM mode
>93% efficiency
>83% at 1mA
Fully integrated MOSFET switches
Micropower shutdown
Thermal shutdown and current limit protection
-40°C to +125°C junction temperature range