MIC23030-AYMT-TR Microchip

MIC23030 8MHz PWM 400mA Buck Regulator with HyperLight Load General Description Features Input voltage: 2.7V to 5.5V HyperLight Load The MIC23030 is a high efficiency 8MHz 400mA synchronous buck regulator with HyperLight Load mode. 400mA output current HyperLight Load provides very high efficiency at light Up to 91% efficiency and 83% at 1mA loads and ultra-fast transient response which is perfectly 21A typical quiescent current suited for supplying processor core voltages. An 8MHz PWM operation in continuous mode additional benefit of this proprietary architecture is very low Ultra fast transient response output ripple voltage throughout the entire load range with Low voltage output ripple the use of small output capacitors. The tiny 1.6mm x 14mVpp ripple in HyperLight Load mode 1.6mm Thin MLF package saves precious board space 5mV output voltage ripple in full PWM mode and requires only three external components. Fully integrated MOSFET switches The MIC23030 is designed for use with a very small 0.01A shutdown current inductor, down to 0.47H, and an output capacitor as small Thermal shutdown and current limit protection as 2.2 F that enables a sub-1mm height. Fixed and adjustable output voltage options available The MIC23030 has a very low quiescent current of 21A 6-pin 1.6mm x 1.6mm Thin MLF and achieves as high as 83% efficiency at 1mA. At higher 40 C to +125 C junction temperature range loads, the MIC23030 provides a constant switching frequency around 8MHz while achieving peak efficiencies Applications up to 91%. Mobile handsets The MIC23030 is available in a 6-pin 1.6mm x 1.6mm Thin Portable media/MP3 players MLF package with an operating junction temperature Portable navigation devices (GPS) range from 40 C to +125C. WiFi/WiMax/WiBro modules Datasheets and support documentation can be found on Digital Cameras Micrels web site at: www.micrel.com. Wireless LAN cards USB powered devices Portable applications ____________________________________________________________________________________________________________ Typical Application Efficiency V = 2.5V OUT 100 U1 MIC23030 V IN V = 3.0V 2.7V to 5.5V V OUT IN 1 90 2 SW VIN L1 C1 V = 3.6V 80 IN EN C2 4 3 SNS EN 70 V = 4.2V IN AGND PGND L = 0.47H 60 56 C = 4.7F OUT GND GND 50 1 10 100 1000 OUTPUT CURRENT (mA) HyperLight Load is a trademark of Micrel, Inc. MLF and MicroLeadFrame are registered trademark 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. MIC23030 Ordering Information Part Number Marking Nominal Output Junction Package Lead Finish Code Voltage Temp. Range MIC23030-AYMT GDA ADJ 40C to +125C 6-Pin 1.6mm x 1.6mm Thin MLF Pb-Free MIC23030-GYMT* GDG 1.8V 40C to +125C 6-Pin 1.6mm x 1.6mm Thin MLF Pb-Free MIC23030-FYMT* GDF 1.5V 40C to +125C 6-Pin 1.6mm x 1.6mm Thin MLF Pb-Free MIC23030-4YMT GD4 1.2V 40C to +125C 6-Pin 1.6mm x 1.6mm Thin MLF Pb-Free MIC23030-CYMT* GDC 1.0V 40C to +125C 6-Pin 1.6mm x 1.6mm Thin MLF Pb-Free Notes: 1. Other options available. Contact Micrel for details. 2. Thin MLF is GREEN RoHS compliant package. Lead finish is NiPdAu. Mold compound is Halogen Free. * Available August 2008. Pin Configuration VIN 1 VIN 1 6 PGND 6 GND SW 2 SW 2 5 AGND 5 FB SNS 3 4 SNS 3 4 EN EN 1.6 x 1.6mm Thin MLF (MT) 1.6 x 1.6mm Thin MLF (MT) Fixed (Top View) Adjustable (Top View) Pin Description Fixed Option ADJ Option Pin Name Pin Function 1 1 VIN Input Voltage: Connect a capacitor to ground to decouple the noise. 2 2 SW Switch (Output): Internal power MOSFET output switches. 3 3 SNS Sense: Connect to V as close to output capacitor as possible to sense OUT output voltage. 4 4 EN Enable (Input): Logic high enables operation of the regulator. Logic low will shut down the device. Do not leave floating. 5 - AGND Analog Ground: Connect to central ground point where all high current paths meet (C , C , PGND) for best operation. IN OUT - 5 FB Feedback (Input): Connect resistor divider at this node to set output voltage. Resistors should be selected based on a nominal V of 0.62V. FB 6 - PGND Power Ground. - 6 GND Ground. E-PAD E-PAD HS PAD Connect to PGND or GND. M9999-082608-B August 2008 2