Source: www.channel-e.biz
Electronics News
500kHz step-down DC/DC converter
Linear Technology announces the LT1912, a 2A, 36V step-down switching regulator packaged in a 3mm x 3mm DFN (or MSOP-10E). The LT1912’s 3.6V to 36V input voltage range makes it usefull for load dump and cold-crank conditions found in automotive applications. Its 3.2A internal switch can deliver up to 2A of continuous output current to voltages as low as 0.79V. Switching frequency is user-programmable from 200kHz to 500kHz. The combination of its 3mm x 3mm DFN-10 package (or thermally enhanced MSOP-10E) and tiny externals provide a compact and thermally efficient footprint.The LT1912 utilizes a 3.2A, 0.25Ohm switch, with the necessary boost diode, oscillator, control and logic circuitry integrated on-chip. Other features include external synchronization (from 250kHz to 500kHz), a power good flag and soft-start capability. The LT1912IDD and LT1912IMSE are tested and guaranteed to operate from a -40°C to 125°C operating junction temperature.
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