Step-Down DC/DC Converter(降压 DC/DC IC)
Part No.  Package  Vin(V) Vout(V) Iout Efficiency  Oscillation  Frequency  (KHz) Replace 
(mA)
SI4012 SOP-8 4.75-20 ADJ 1.5A 95% 410K
SI4065 SOP-8 4.75-28 ADJ 2A 95% 200K MP1580
SI4070 SOP-8 4.5-30 ADJ 3A 95% 400K MP1583,MP1591
SI1101 SOT23-5 2.3-18 1.2-6 1A(+MOS) 90% 500KHZ -
SI1102 SOP-8 2.5-18 ADJ 1A 90% 500KHZ -
SI3406同步降压 SOT23-5 2.5-5.5 5.5-0.6 700 0.95 1.5M LTC3406,APS1006,RT8008
SI1410 SOT-8 - - - - - APM1410
SI3223 同步升降压 SOT23-6 1.8-5.5 2.7/3.0/3.3/4.5/5.0/5.5 60 90% 1.0M _
SI1001同步降压 SOT23-5 2.5-5.5 1.2/1.5/1.8/ADJ 700 95% 1.5M RT8008,NCP1509APS1006,
ACT6906MP2104,AMC3100
SI1002同步降压 SOT23-5 2.5-5.5 1.2/1.5/1.8/ADJ 700 95% 1.5M XC9216,LM3671,
LTC9216，ACT6907
SI34063 SOP-8 3~40V Adj 1.5A 80% 150kHz AMC34063