2BARRY A, ROBERT E, DRAGAN M. DC-DC converter design for battery-operated system[C]//Power Electronics Specialists Conference. Atlanta.. International Association of Engineers, 1995 : 103 - 105.
3SAHU B, RINCON-MORA G A. A high-efficiency, dual mode, dynamic, buck boost power supply IC for portable applications[C]///VLSI Design, 2005. 18 th International Conference. Washington. DC: IEEE Computer Society, 2005:858 - 861.
4XIAO J X, PETERCHEV A V, ZHANG J H, et al. A 4-uA quiescent-current dual-mode digitally controlled buck converter IC for cellular phone applications[J].IEEE Journal of Solid-state Circuits, 2004, 39(12) : 2342 - 2348.
5SAHU B, RINCON-MORA G A. An accurate, lowvoltage, CMOS switching power supply with adaptive on-time pulse-frequency modulation (PFM) control[J]. IEEE Transaction of Circuit and Systems, 2007, 54 (2) : 312 - 321.
6TSEKK, CHUNG HSH, HUISYR, etal. Spectral characteristics of random carrier frequency switching in off-line switched mode power supply [C]//IEEE Applied Power Electronics Conference and Exposition. Dallas: International Association of Engineers 1999:139 - 145.
7KUISMA M. Variable frequency switching in power supply EMI-control: an overview [J].Aerospace and Electronic Systems Magazine, 2003, 18(12): 18-22.