AS1345

General Description Figure 1: Available Products Devices AS1345A AS1345B AS1345C AS1345D AS1345 18V, High Efficiency, DC-DC Step-Up Converter The AS1345 high efficiency DC-DC step-up converter contains 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. Peak Coil Current 100mA 200mA 350mA 500mA Output adjustable or fixed adjustable or fixed adjustable or fixed adjustable or fixed For order related information, please refer to “Ordering & Contact Information” on page 26. 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. For further understanding in regards to the contents of the datasheet, please refer to the Reference Guide located at the end of the document. ams Datasheet, Confidential: 2013-Nov [1-51] AS1345 – 1 General Description Figure 2: ...