MIC2601YML-TR Microchip

MIC2601/2 1.2A, 1.2MHz/2MHz Wide Input Range Integrated Switch Boost Regulator General Description Features The MIC2601/2 is a 1.2MHz/2MHz, PWM DC/DC boost Wide input voltage range: 4.5V to 20V switching regulator available in a 2mm x 2mm MLF Output voltage adjustable to 40V package. High power density is achieved with the 1.2A switch current MIC2601/2s internal 40V/1.2A switch, allowing it to power MIC2601 operates at 1.2MHz large loads in a tiny footprint. MIC2602 operates at 2MHz The MIC2601/2 implements constant frequency Stable with small size ceramic capacitors 1.2MHz/2MHz PWM current mode control. The MIC2601/2 offers internal compensation that provides excellent High efficiency transient response and output regulation performance. The Programmable soft start high frequency operation saves board space by allowing <10A shutdown current small, low-profile external components. The fixed UVLO frequency PWM scheme also reduces spurious switching Output over-voltage protection noise and ripple to the input power source. Over temperature shutdown Soft start reduces in rush current and is programmable via 8-pin 2mm x 2mm MLF package external capacitor. 40 C to +125 C junction temperature range The MIC2601/2 is available in a 2mm x 2mm 8-pin MLF leadless package. Both devices have an output over- voltage protection feature. Applications The MIC2601/2 has an operating junction temperature Multimedia STB/Antenna range of 40 C to +125 C. Broadband communications Data sheets and support documentation can be found on TFT-LCD bias supplies Micrels web site at: www.micrel.com. Bias supply Positive output regulators SEPIC converters DSL applications Local boost regulators Typical Application 10H 18V Efficiency OUT V OUT 100 18V, 500mA 90 MIC2601/2 80 12V 8V IN IN 6.65K 70 VIN SW 60 V = 12V IN EN FB 50 2.2F 10F 40 VDD SS 0.1F 30 AGND PGND 20 0.1F 10 00 0 100 200 300 400 500 600 700800 LOAD CURRENT (mA) 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. MIC2601/2 Ordering Information (2) Part Number Marking Frequency Output Over Temperature Range Package Lead Finish (1) Code Voltage Protection MIC2601YML RD1 1.2MHz 40V 40 to +125C 8-Pin 2mm x 2mm MLF Pb-Free MIC2602YML RE1 2MHz 40V 40 to +125C 8-Pin 2mm x 2mm MLF Pb-Free Notes 1. Overbar ( ) symbol my not be to scale. 2. MLF is a GREEN RoHS compliant package. Lead finish is NiPdAu. Mold compound is Halogen Free. Pin Configuration VIN 1 8 PGND VDD 2 SW 7 EN 3 6 FB AGND 4 5 SS 8-Pin 2mm x 2mm MLF (ML) Pin Description Pin Number Pin Name Pin Function 1 VIN Supply (Input): 4.5V to 20V input voltage. 2 VDD Internal regulator. VDD should be connected to VIN when VIN 7V. 3 EN Enable (Input): Logic high enables regulator. Logic low shuts down regulator. 4 AGND Analog Ground 5 SS Soft Start 6 FB Feedback (Input): 1.25V output voltage sense node. V = 1.25V ( 1 + R1/R2) OUT 7 SW Switch Node (Input): Internal power BIPOLAR collector. 8 PGND Power ground EP GND Ground (Return): Exposed backside pad. Internally fused to AGND and PGND pins. M9999-090909-A September 2009 2