AS1345D-TD-AD_EK_ST ams

AS1345 18V, High Efficiency, DC/DC Step-Up Converter The AS1345 high efficiency DC/DC step-up converter contains General Description an internal N-channel and an internal P-channel output isolation switch. The device operates from a 2.9V to 5.0V supply and can boost voltages up to 18V. A hysteretic control scheme is used to provide the highest operating efficiency over a wide range of input and output load conditions. The internal MOSFET switches reduce the external component count and a high switching frequency allows the use of tiny surface mount components. The AS1345 employ a factory set current limit to reduce ripple and external component size in low output current applications. With a 500mA current limit the AS1345 is capable of providing 20mA 18V output. Figure 1: Available Products Devices Peak Coil Current Output AS1345A 100mA Adjustable or fixed AS1345B 200mA Adjustable or fixed AS1345C 350mA Adjustable or fixed AS1345D 500mA Adjustable or fixed Built-in safety features protect the internal switches and output components from fault conditions. Additional power-saving attributes include a very low quiescent current and a true shutdown mode. Ordering Information and Content Guide appear at end of datasheet. ams Datasheet Page 1 v1-56 2016-Dec-28 Document FeedbackAS13 45 Gene ral Des c rip t ion Key Benefits & Features The benefits and features of AS1345, 18V, High Efficiency, DC/DC Step-Up Converter are listed below: Figure 2: Added Value of Using AS1345 Benefits Features Supports Lithium primary and re-chargeable Input Voltage Range: 2.9V to 5.0V batteries Adjustable Output Voltage Range: 5.0V to 18V Supports a variety of end applications Output Current up to 40mA Allows optimization of circuit depending on Inductor Peak Currents: 100, 200, 350 and 500 mA output power demands Battery life improved 90% Efficiency Battery supply isolated during shutdown True Shutdown Fault tolerant Short Circuit and Thermal Protection Packages: 8-pin (2x2mm) TDFN Small chipscale package 8-bumps (1.570mm x 0.895mm) WL-CSP with 0.4mm pitch Applications The AS1345 is ideal for: Small and low current demand LCD panels as well as for polymer LEDs (OLED) Cell phones, PDAs Readers Mobile terminals 3D shutter glasses Page 2 ams Datasheet Document Feedback v1-56 2016-Dec-28