ANALOG DEVICES LT1976EFE#TRPBF DC-DC Switching Buck Regulator, Adjustable, 3.3 to 60V in, 1.5A out, TSSOP-EP-16

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 2?A (active-low SHDN=0V, BOOST=0V, FB/PGFB=0V)
• BIAS quiescent current is 800?A (SYNC=3.3V)
• Operating junction temperature range from �40°C to 125°C
• 16-lead plastic TSSOP package

Notes

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