DescripTion
The LTC®3115-2 is a high voltage monolithic synchronous buck-boost DC/DC converter optimized for applications subject to fast (<1ms) input voltage transients. For all other applications,theLTC3115-1 is recommended.With its wide 2.7Vto40Vinput and output voltage ranges,theLTC3115-2 is well suited for use in a wide variety of automotive and industrial power supplies. A proprietary low noise switch ing algorithm optimizes efficiency with input voltages that are above, below or even equal to the output voltage and ensures seamless transitions between operational modes.

FEATUREs
● Wide VIN Range: 2.7V to 40V
● Wide VOUT Range: 2.7V to 40V
● 0.8A Output Current for VIN ≥ 3.6V, VOUT = 5V
● 2A Output Current in Step-Down Operation for VIN ≥ 6V
● Programmable Frequency: 100kHz to 2MHz
● Synchronizable Up to 2MHz with an External Clock
● Up to 95% Efficiency
● 30µA No-Load Quiescent Current in Burst Mode® Operation
● Ultralow Noise Buck-Boost PWM
● Internal Soft-Start
● 3µA Supply Current in Shutdown
● Programmable Input Undervoltage Lockout
● Small 4mm × 5mm × 0.75mm DFN Package
● Thermally Enhanced 20-Lead TSSOP Package

APPLICATIONs
● 24V/28V Industrial Applications
● Automotive Power Systems
● Telecom, Servers and Networking Equipment
● FireWire Regulator
● Multiple Power Source Supplies