LT1507CS8-3.3#PBF

LT1507 is a monolithic buck mode switching regulator, functionally identical to the LT1375 but optimized for lower input voltage applications. A 1.5A 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. A special high speed bipolar process and new design techniques allow this regulator to achieve high efficiency at a high switching frequency. Efficiency is maintained over a wide output current range by keeping quiescent supply current to 4mA and by utilizing a supply boost capacitor to allow the NPN power switch to saturate. A shutdown signal will reduce supply current to 20µA. It is widely used in application such as portable computers, battery-powered systems, battery charger, distributed power etc.

• Cycle-by-cycle current limiting, easily synchronizable
• Operates with inputs as low as 4V
• Uses all surface mount components
• Saturated switch design is 0.3 ohm typical
• Inductor size as low as 2µH
• Sense voltage is 3.3V typical
• Switch current limit is 2A typical at (VC open, VFB = 2.1V or VSENSE = 2.9V)
• Switch frequency is 500KHz typical
• Operating ambient temperature is 0°C to 70°C
• Package style is 8-lead NSOIC

Notes

ADI products are only authorized (and sold) for use by the customer and are not to be resold or otherwise passed on to any third party