MIC23050-SYML-TR Microchip

MIC23050 4MHz PWM Buck Regulator with HyperLight Load Switching Scheme General Description Features The Micrel MIC23050 is a high-efficiency, 600mA, PWM, Input voltage: 2.7V to 5.5V HyperLight Load synchronous buck (step-down) regulator featuring the 600mA output current HyperLight Load patented switching scheme that offers Fixed output voltage from 0.72V to 3.3V best-in-class light load efficiency and transient Ultra-fast transient response performance while providing very-small external components and low output ripple at all loads. 20A typical quiescent current The MIC23050 also has a very-low typical quiescent 4MHz in PWM in constant-current mode current draw of 20A and can achieve over 89% efficiency 0.47H to 2.2H inductor even at 1mA. The device allows operation with a tiny Low voltage output ripple inductor ranging from 0.47H to 2.2H and uses a small 25mV in HyperLight Load mode PP output capacitor that enables a sub-1mm height. 3mV output voltage ripple in full PWM mode In contrast to traditional light load schemes, the HyperLight >93% efficiency Load architecture does not need to trade off control speed to obtain low standby currents and in doing so the ~89% at 1mA device only needs a small output capacitor to absorb the Micropower shutdown load transient as the powered device goes from light load Available in 8-pin 2mm x 2mm MLF to full load. 40 C to +125 C junction temperature range At higher loads the MIC23050 provides a constant Applications switching frequency of greater than 4MHz while providing peak efficiencies greater than 93%. Cellular phones The MIC23050 comes in fixed output voltage options from Digital cameras 0.72V to 3.3V eliminating external feedback components. Portable media players The MIC23050 is available in an 8-pin 2mm x 2mm MLF Wireless LAN cards with a junction operating range from 40 C to +125C. WiFi/WiMax/WiBro modules Datasheets and support documentation can be found on Micrels web site at: www.micrel.com. USB-powered devices ____________________________________________________________________________________________________________ Typical Application HyperLight Load is a trademark of Micrel, Inc. Protected by US Patent No. 7064531 MLF and MicroLeadFrame are registered trademarks of Amkor Technology, Inc. Micrel Inc. 2180 Fortune Drive San Jose, CA 95131 USA tel +1 (408) 944-0800 fax + 1 (408) 474-1000 Micrel, Inc. MIC23050 Ordering Information Nominal Output (2) Part Number Marking Junction Temperature Range Package Lead Finish (1) Voltage MIC23050-CYML GKC 1.0V 40 to +125C 8-Pin 2x2 MLF Pb-Free MIC23050-4YML GK4 1.2V 40 to +125C 8-Pin 2x2 MLF Pb-Free MIC23050-GYML GKG 1.8V 40 to +125C 8-Pin 2x2 MLF Pb-Free MIC23050-SYML GKS 3.3V 40 to +125C 8-Pin 2x2 MLF Pb-Free Notes 1. Other output voltage options available (0.72V to 3.3V), contact Micrel for details. 2. MLF is a GREEN RoHS compliant package. Lead finish is NiPdAu. Mold compound is Halogen Free. Pin Configuration SW 1 8 PGND EN 2 7 VIN NC 3 6 AGND SNS 4 5 CFF 8-Pin 2mm x 2mm MLF (ML) (Top View) Pin Description Pin Number Pin Name Pin Name 1 SW Switch (Output): Internal power MOSFET output switches. Enable (Input). Logic low will shut down the device, reducing the quiescent current to less than 4A. 2 EN Do not leave floating. 3 NC No Connect. 4 SNS Connect to V to sense output voltage. OUT 5 CFF Feed Forward Capacitor. Connect a 560pF capacitor from V to CFF pin. OUT 6 AGND Analog Ground. 7 VIN Supply Voltage (Input): Requires bypass capacitor to GND. 8 PGND Power Ground. M9999-092211-E September 2011 2