MIC2296YD5-TR Microchip

MIC2296 High Power Density 1.2A Boost Regulator General Description Features The MIC2296 is a 600kHz, PWM dc/dc boost switching 2.5V to 10V input voltage range regulator available in a 2mm x 2mm MLF package option. Output voltage adjustable to 34V High power density is achieved with the MIC2296s 1.2A switch current internal 34V / 1.2A switch, allowing it to power large loads 600kHz PWM operation in a tiny footprint. The MIC2296 is a version of the MIC2295 1.2MHz, PWM dc/dc boost switching regulator, Stable with small size ceramic capacitors that offers improved efficiency resulting from 600kHz High efficiency operation. Low input and output ripple The MIC2296 implements constant frequency 600kHz <1A shutdown current PWM current mode control. The MIC2296 offers internal UVLO compensation that offers excellent transient response and Output over-voltage protection (MIC2296BML) output regulation performance. The high frequency operation saves board space by allowing small, low-profile Over temperature shutdown external components. The fixed frequency PWM scheme 2mm x 2mm leadless 8-pin MLF package option also reduces spurious switching noise and ripple to the o o 40 C to +125 C junction temperature range input power source. The MIC2296 is available in a low-profile Thin SOT23 5- pin package and a 2mm x2mm 8-pin MLF leadless Applications package. The 2mm x 2mm MLF package option has an Organic EL power supplies output over-voltage protection feature. 3.3V to 5V/500mA conversion The MIC2296 has an operating junction temperature range TFT-LCD bias supplies of 40C to +125C Positive and negative output regulators SEPIC converters Positive to negative Cuk converters 12V supply for DSL applications Multi-output dc/dc converters L1 V V OUT OUT 10H 10H 15V/100mA 5V/400mA 1000 pF MIC2296BML MIC2296 BD5 R1 SW V VIN IN R1 VIN SW 10k 1-Cell OVP 10k Li Ion V IN FB EN 10F EN FB 3V to 4.2V 1-Cell C1 2.2F C1 R2 Li Ion 2.2F 2.2F AGND PGND 901 R2 GND 3.3k 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. MIC2296 Ordering Information Part Number Marking Code Output Over Junction Package Voltage Protection Temp. Range Standard Lead-Free Standard Lead-Free MIC2296BML MIC2296YML 34V WDA WDA -40C to 125C 8-Pin 2mm x2mm MLF MIC2296BD5* MIC2296YD5* - WDAA WDAA -40C to 125C 5-Pin Thin SOT-23 * Contact factory for availability. Pin Configuration FB GND SW 1 OVP 1 8 PGND 3 2 VIN 2 7 SW EN 3 6 FB 4 5 AGND 4 5 NC EP EN VIN TSOT-23-5 (BD5) 8-pin MLF (BML) Pin Description MIC2296BD5 MIC2296BML Thin SOT-23-5 2x2 MLF-8L Pin Name Pin Function Output Over-Voltage Protection (Input): Tie this pin to V to clamp OUT 1 OVP the output voltage to 34V maximum in fault conditions. Tie this pin to ground if OVP function is not required. 5 2 VIN Supply (Input): 2.5V to 10V input voltage. Enable (Input): Logic high enables regulator. Logic low shuts down 4 3 EN regulator. 4 AGND Analog ground 5 N/C No connect. No internal connection to die. Feedback (Input): 1.24V output voltage sense node. V = 1.24V ( 1 + OUT 3 6 FB R1/R2) 1 7 SW Switch Node (Input): Internal power BIPOLAR collector. 8 PGND Power ground 2 GND Ground (Return): Ground. EP GND Ground (Return). Exposed backside pad. M9999-011310 January 2010 2