Features

• Regulates V_OUT Above, Below or Equal to V_IN
• Single Inductor
• Wide V_IN Range: 2.2V to 40V
• Wide V_OUT Range: 2.7V to 40V
• 1A Output Current in Buck Mode
• 0.5A Output Current, V_IN = 3.6V, V_OUT = 5V
• Programmable Average Output Current
• Up to 96% Efficiency
• Burst Mode® Operation, 30μA No-Load I_Q
• Current Mode Control
• 1.2MHz Ultralow Noise PWM
• Accurate RUN Pin Threshold
• Thermally Enhanced, 16-lead 3mm × 5mm DFN and TSSOP Packages

Typical Application

Description

The LTC®3114-1 is a versatile, wide operating voltage range synchronous monolithic buck-boost DC/DC converter with programmable average output current. The LTC3114-1’s proprietary buck-boost PWM control circuitry delivers low noise operation across the entire operating voltage range. Current mode control ensures exceptional line and load transient responses.

Synchronous, internal MOSFET switches and pin selectable Burst Mode operation maintain high efficiency across the entire range of load current. Average output current is programmed with a standard resistor and provides the basis for wide input range, high efficiency charging systems or constant current, high efficiency LED drive. Regulator turn-on is programmable through the accurate RUN pin. Quiescent current is just 3μA in shutdown. Overtemperature protection, short-circuit protection and soft-start are integrated. The LTC3114-1 is offered in 16-lead 3mm × 5mm × 0.75mm DFN and 16 lead TSSOP (FE) packages.