LT1976IFE#PBF

LT®1976 is a 200KHz monolithic step-down switching regulator that accepts input voltages up to 60V. A high efficiency 1.5A, 0.2ohm switch is included on the die along with all the necessary oscillator, control and logic circuitry. Innovative design techniques along with a new high voltage process achieve high efficiency over a wide input range. Efficiency is maintained over a wide output current range by employing burst mode operation at low currents, utilizing the output to bias the internal circuitry, and by using a supply boost capacitor to fully saturate the power switch. External synchronization can be implemented by driving the SYNC pin with logic-level inputs. The device also has a power good flag with a programmable threshold and time-out and thermal shutdown protection. Typical applications are high voltage power conversion, 14V and 42V automotive systems, industrial power systems, distributed power systems, battery-powered systems.

• A single capacitor from the CSS pin to output provides a controlled output voltage ramp (soft-start)
• Current mode topology is used for fast transient response and good loop stability
• Power good flag with programmable threshold, soft-start capability
• 1.25V feedback reference voltage, easily synchronizable
• Wide input range from 3.3V to 60V
• Active-low SHDN threshold voltage range from 1.2 to 1.4V (–40°C to 125°C)
• Supply shutdown current is 2μA (active-low SHDN=0V, BOOST=0V, FB/PGFB=0V)
• BIAS quiescent current is 800μA (SYNC=3.3V)
• Operating junction temperature range from –40°C to 125°C
• 16-lead plastic TSSOP package

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