Features

• Regulates V_OUT Above, Below or Equal to V_IN
• Wide V_IN Range: 2.4V to 25V (<1V to 25V Using EXTV_CC Input)
• V_OUT Range: 1V to 25V
• Adjustable Output Voltage (LTC3130)
• Four Selectable Fixed Output Voltages (LTC3130-1)
• 1.2µA No-Load Input Current in Burst Mode® Operation (V_IN = 12V, V_OUT = 5V)
• 600mA Output Current in Buck Mode
• Pin-Selectable 850mA/450mA Current Limit (LTC3130)
• Up to 95% Efficiency
• Pin-Selectable Burst Mode Operation
• 1.2MHz Ultralow Noise PWM Frequency
• Accurate RUN Pin Threshold n Power Good Indicator
• Programmable Maximum Power Point Control
• I_Q = 500nA in Shutdown
• Thermally-Enhanced 20-Lead 3mm × 4mm QFN and 16-Lead MSOP Packages

Typical Application

Description

The LTC3130/LTC3130-1 are high efficiency, low noise, 600mA buck-boost converters with wide VIN and VOUT ranges. For high efficiency operation at light loads, BurstMode operation can be selected, reducing the quiescent current to just 1.6µA. Converter start-up is achieved from sources as low as 7.5µW.

TheLTC3130/LTC3130-1 employanultralownoise, 1.2MHz PWM architecture that minimizes solution footprint by allowing the use of tiny, lowprofile inductors and ceramic capacitors. Built-in loop compensation and soft-start reduces external parts count and simplifies the design. Features include anaccurateRUNcomparator thresholdto allowpredictable regulatorturn-on and a maximum power point control (MPPC) capability that ensures maximum power extraction from non-ideal sources such as photovoltaic panels. The LTC3130-1 includes an internal voltage divider to provide four selectable fixed output voltages.

Additional features include a power good output, an external V_CC input and thermal shutdown.

The LTC3130 and LTC3130-1 are available in thermally-enhanced 20-lead 3mm × 4mm QFN and 16-lead MSOP packages.