SC1188 Datasheet | SEMTECH

Description Features The SC1188 bines a synchronous voltage mode con- u Synchronous design, enables no heatsink solution troller with two low-dropout linear regulators providing u 95% efficiency (switching section) most of the circuitry necessary to implement three DC/ u 4 bit DAC for output programmability DC converters for powering advanced, low cost u 1.8V, 2.5V short circuit protected linear controllers microprocessors. u VRM8.4 pliant The SC1188 switching section Features an integrated 4 bit D/A converter, latched drive output for enhanced noise immunity and pulse by pulse current limiting. The SC1188 switching section operates at a fixed frequency of 200k Hz, providing an optimum promise between size, efficiency and cost in the intended application areas. The integrated D/A converter provides programmability of output voltage from 1.30V to 2.05V in 50m V increments with no external ponents. The SC1188 linear sections are low dropout regulators with short circuit protection, supplying 1.8V for Bridge and 2.5V for non-GTL I/O. Applications u Low Cost Motherboards u 1.3V to 2.05V microprocessor supplies u Programmable triple power supplies Typical Application Circuit 12V IN 5V IN Cin 1500u F x4 + VID0 VID1 VID2 VID3 3.3V IN 0.1u F U5 SC1188CS 5 LDOEN CS+ 16 VID0 15 VID1 14 VID2 13 VID3 CSVOSENSE BST DH DL 1 GATE2 4 LDOS2 GND GATE1 LDOS1 7 6 12 11 10 9 8 2 3 0.1u F + 47u F 0.1u F IRLR3103N...