MIC2295YML-TR Microchip

MIC2295 High Power Density 1.2A Boost Regulator General Description Features The MIC2295 is a 1.2Mhz, PWM dc/dc boost switching 2.5V to 10V input voltage range regulator available in low profile Thin SOT23 and 2mm x Output voltage adjustable to 34V 2mm MLF package options. High power density is 1.2A switch current achieved with the MIC2295s internal 34V / 1.2A switch, 1.2MHz PWM operation allowing it to power large loads in a tiny footprint. Stable with small size ceramic capacitors The MIC2295 implements constant frequency 1.2MHz PWM current mode control. The MIC2295 offers internal High efficiency compensation that offers excellent transient response and Low input and output ripple output regulation performance. The high frequency <1A shutdown current operation saves board space by allowing small, low-profile UVLO external components. The fixed frequency PWM scheme Output over-voltage protection (MIC2295BML) also reduces spurious switching noise and ripple to the input power source. Over temperature shutdown The MIC2295 is available in a low-profile Thin SOT23 5- Thin SOT23-5 package option lead package and a 2mm x2mm 8-lead MLF leadless 2mm x 2mm leadless 8-lead MLF package option package. The 2mm x 2mm MLF package option has an o o 40 C to +125 C junction temperature range output over-voltage protection feature. The MIC2295 has an operating junction temperature range Applications of 40C to +125C Organic EL power supplies 3.3V to 5V/500mA conversion TFT-LCD bias supplies Flash LED drivers Positive and negative output regulators SEPIC converters Positive to negative Cuk converters 12V supply for DSL applications Multi-output dc/dc converters L1 V OUT V OUT 10H 5V/500mA 10H 15V/100mA MIC2295 BD5 MIC2295BML VIN SW R1 SW V VIN IN R1 10k V 1-Cell OVP IN 49.9k 10F FB EN 1-Cell Li Ion EN FB C1 Li Ion 3V to 4.2V C1 2.2F 2.2F R2 GND 2.2F R2 3.3k AGND PGND 4.53K MLF and MicroLeadFrame is a trademark of Amkor Technology Micrel Inc. 2180 Fortune Drive San Jose, CA 95131 USA tel +1 (408) 944-0800 fax + 1 (408) 474-1000 Micrel, Inc. MIC2295 Ordering Information Part Number Marking Code Output Over Junction Temperature Package Voltage Protection Range Standard Lead-Free Standard Lead-Free MIC2295BD5 MIC2295YD5 SVAA SVAA -40C to 125C Thin SOT23-5 2mm x2mm MIC2295BML MIC2295YML 34V SXA SXA -40C to 125C MLF-8L Pin Configuration Pin Description MIC2295BD5 MIC2295BML Thin SOT-23-5 2x2 MLF-8L Pin Name Pin Function 1 7 SW Switch Node (Input): Internal power BIPOLAR collector. 2 GND Ground (Return): Ground. Feedback (Input): 1.24V output voltage sense node. V = OUT 3 6 FB 1.24V ( 1 + R1/R2) Enable (Input): Logic high enables regulator. Logic low 4 3 EN shuts down regulator. 5 2 VIN Supply (Input): 2.5V to 10V input voltage. Output Over-Voltage Protection (Input): Tie this pin to V OUT to clamp the output voltage to 34V maximum in fault 1 OVP conditions. Tie this pin to ground if OVP function is not required. 5 N/C No connect. No internal connection to die. 4 AGND Analog ground 8 PGND Power ground EP GND Ground (Return). Exposed backside pad. M9999-042605 April 2005 2 (408) 955-1690