LT1777CS

The LT1777CS is one member of the LT1777 family which is designed as the low noise step-down switching regulator that can be used in (1)automotive cellular and GPS receivers; (2)telecom power supplies; (3)industrial instrument power supplies. This device operates much the same as traditional current mode switchers, the major difference being its specialized output switch section and shows an improvement of about 10dB with 0mH and perhaps 25dB with 2.2mH.

Features of the LT1777CS are:(1)programmable dI/dt limit; (2)internally limited dV/dt; (3)high input voltage: 48V max; (4)700mA peak switch rating; (5)true current mode control; (6)100kHz fixed operating frequency; (7)synchronizable to 250kHz; (8)low supply current in shutdown: 30uA; (9)low thermal resistance 16-pin SO package.

The absolute maximum ratings of the LT1777CS can be summarized as:(1)supply voltage:48 V;(2)switch voltage (VIN-VSW):51 V;(3)SHDN, SYNC pin voltage:7 V;(4)Vcc pin voltage:30 V;(5)FB pin voltage:3.0 V;(6)operating junction temperature range:0°C to 125°C;(7)storage temperature range:-65°C to 150°C;(8)lead temperature (soldering, 10 sec):300°C. If you want to know more information such as the electrical characteristics about the LT1777CS, please download the datasheet in www.seekic.com or www.chinaicmart.com .