MIC2292-15YML-TR Microchip

MIC2292/93 High-Frequency PWM White LED Drivers with Internal Schottky Diode and OVP General Description Features The MIC2292 and MIC2293 are high frequency, Pulse 2.5V to 10V input voltage Width Modulator (PWM) boost regulators optimized for Output voltage up to 34V constant-current, white LED driver applications. Because Internal Schottky diode of their constant PWM switching frequencies of 1.6MHz 1.6MHz PWM operation (MIC2292) and 2MHz, respectively, the MIC2292/93 can use the smallest external components, allowing designers to avoid 2.0MHz PWM operation (MIC2293) sensitive IF bands in their RF applications. Stable with ceramic capacitors The products feature an internal Schottky diode and two 15V and 34V output overvoltage protection options levels of output overvoltage protection allowing a small 500mA switch current rating size and efficient DC/DC solution that requires only four 95mV feedback voltage external components. <1% line and load regulation The 2.5V to 10V input voltage range of MIC2292/3 allows <1A shutdown current direct operation from 1- and 2-cell Li Ion as well as 3- to 4- cell NiCad/NiMH/Alkaline batteries. The MIC2292/3 Over-temperature protection products are available in a small size 2mm 2mm 8-pin UVLO MLF package and have a junction temperature range of 8-pin (2mm 2mm) MLF package 40C to +125C. 40C to +125C junction temperature range Data sheets and support documentation can be found on Applications Micrels web site at: www.micrel.com. White LED driver for backlighting: Cell phones PDAs GPS systems Digital cameras MP3 players IP phones Constant-current power supplies _________________________________________________________________________________________________________________________ Typical Application 1.6MHz PWM White LED Driver with 15V OVP 2MHz PWM White LED Driver with 15V OVP MLF and MicroLead Frame 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. MIC2292/93 Ordering Information Marking Overvoltage Junction Temperature Lead Part Number Frequency Package Code Protection Range Finish MIC2292-15BML SWA 15V 1.6MHz 40 to +125C 8-Pin MLF Standard MIC2292-15YML 15V 1.6MHz 40 to +125C 8-Pin MLF Pb-Free SWA MIC2292-34BML SWC 34V 1.6MHz 40 to +125C 8-Pin MLF Standard MIC2292-34YML 34V 1.6MHz 40 to +125C 8-Pin MLF Pb-Free SWC MIC2293-15BML SZA 15V 2MHz 40 to +125C 8-Pin MLF Standard MIC2293-15YML 15V 2MHz 40 to +125C 8-Pin MLF Pb-Free SZA MIC2293-34BML SZC 34V 2MHz 40 to +125C 8-Pin MLF Standard MIC2293-34YML 34V 2MHz 40 to +125C 8-Pin MLF Pb-Free SZC Pin Configuration 8-Pin MLF (ML) (Top View) Fused Lead Frame Pin Description Pin Number Pin Name Pin Function 1 OUT Output Pin and Overvoltage Protection (Output). Connect to the output capacitor and LEDs. 2 VIN Supply (Input). Input voltage. 3 EN Enable (Input). Logic HIGH enables regulator and logic LOW shuts down regulator. 5 NC No Connect. No internal connection to die. Feedback (Input). Output voltage sense node. Connect the cathode of the LED to this pin. A 6 FB resistor from this pin to Ground (GND) sets the LED current. 7 SW Switch Node (Input). Internal power transistor collector. 4, 8 GND Ground (Return). Ground. EP GND Ground (Return). Exposed backside pad (ePad). M9999-040212-B April 2012 2