Fastest Transient Performance, Highest Efficiency 4MHz 500mA Synchronous Buck Regulators Feature Hyper Light Load™

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The MIC23050/1 are two ultra-fast transient performance and high efficiency 4MHz, 500mA synchronous buck (step-down) regulators assembled in a tiny 2mm x 2mm MLF® package. These devices utilize a novel and patented switching scheme that offer best-in-class light load efficiency and industry leading transient performance. The devices use the smallest inductors in their class and provide very low output ripple at all loads. The unique combination of features makes these devices the perfect choice for today’s portable applications where high efficiency, fast dynamic response, low output noise and a small solution size are critical.

These two step-down regulators for portable applications can achieve more than 85 percent efficiency at 1mA. They are part of Micrel’s latest generation family of DC-to-DC converters, featuring Hyper Light Load™. The devices also offer best-in-class transient performance and low ripple across all loads allowing for the smallest output capacitors. The MIC23051 also features voltage scaling where an active signal can dynamically lower the output voltage reducing the sleep mode power draw by the circuit being powered, saving even more power and increasing stand-by time of portable applications.

 

FEATURES Input voltage range: 2.7V to 5.5V Fixed output voltage options from 0.72V to 2.5V Output current guaranteed up to 500mA Ultra-fast transient response 20µA typical quiescent current 4MHz in PWM in constant current mode Hyper Light Load™ mode 0.47µH or 1µH inductor Low voltage output ripple 25mVpp in hyper light load mode 7mV output voltage ripple in full PWM mode >93% efficiency ~85% at 1mA Fully integrated MOSFET switches Micropower shutdown Thermal shutdown and current limit protection 8-pin 2mm x 2mm MLF® –40 °C to +125 °C junction temperature range

APPLICATIONS Cellular phones Portable media players GPS systems WiMax modules USB peripherals

 

 

 

Note: MLF is a registered trademark of Amkor Technology. Hyper Light Load is a trademark of Micrel, Inc.

 

 

 Featured Products

Part Number		Description	Data Sheet	App. Notes
MIC23050-4YML TR		4MHz PWM Buck Regulator with HYPER LIGHT LOAD™
MIC23050-GYML TR		4MHz PWM Buck Regulator with HYPER LIGHT LOAD™
MIC23051-CGYML		4MHz PWM Buck Regulator with HYPER LIGHT LOAD™ and Voltage Scaling

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