Linear Technology LT1506 Manuals

The LT ®1506 is a 500kHz monolithic buck mode switching regulator functionally identical to the LT1374 but optimized for lower input voltage applications. It will operate over a 4V to 15V input range compared with 5.5V to 25V for the LT1374. A 4.5A switch is included on the die along with all the necessary oscillator, control and logic circuitry. High switching frequency allows a considerable reduction in the size of external components. The topology is current mode for fast transient response and good loop stability. Both fixed output voltage and adjustable parts are available. A special high speed bipolar process and new design tech- niques achieve high efficiency at high switching frequency. Efficiency is maintained over a wide output current range by keeping quiescent supply current to 4mA and by utiliz- ing a supply boost capacitor to saturate the power switch. The LT1506 fits into standard 7-pin DD and fused lead SO-8 packages. Full cycle-by-cycle short-circuit protection and thermal shutdown are provided. Standard surface mount external parts are used, including the inductor and capacitors. There is the optional function of shutdown or synchronization.

The LT1506 is a 500kHz step-down switching regulator with a constant switching frequency of 500kHz. It is easily synchronizable and operates with an input as low as 4V. The regulator uses all surface mount components and features a reduced inductor size of 1.8µH. The saturating switch design has a resistance of 0.07Ω and the shutdown current is 20µA. It also includes cycle-by-cycle current limiting. The LT1506 is optimized for lower input voltage applications and has a wide input range of 4V to 15V. It is a current mode topology with high efficiency at high switching frequency. The regulator fits into standard 7-pin DD and fused lead SO-8 packages and provides full cycle-by-cycle short-circuit protection and thermal shutdown. It can be used for both fixed output voltage and adjustable applications.