5_V_TO_12_V_1_A_DC_TO_DC_CONVERTER

Published:2009/7/13 2:19:00 Author:May | From:SeekIC

Local on-board conversion from 5 V to 12 V for use in amplifier, signal conditioning, or bus driver circuitry normally entails the use of a module or complex dc-to-dc converter design. The LT1269 100-kHz PWM switching regulator can provide a minimum of 1 A at a regulated 12 V in a surface-rnountable DD package (500 mA in 20-lead, small-outline SMT). Included on the chip is a low-ON-resistance switch (0.33 Ω) with a 4-A current limit for high-efficiency conversion in the boost converter shown here. The high switching frequency permits the use of small inductors and capacitors in this converter. The device can be placed in a micropower shutdown mode (100 μA typical supply current) by activating a clamp on the VC pin.



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