ANALOG DEVICES LTC3115HFE-2#PBF DC-DC Switching Synchronous Buck-Boost Regulator, Adjustable, 2.7 to 40V in, 2.7 to 40V / 2A Out

LTC3115HFE-2#PBF is a high-voltage monolithic synchronous buck-boost DC/DC converter optimized for applications subject to fast (<1ms) input voltage transients. With its wide 2.7V to 40V input and output voltage ranges, the LTC3115-2 is well-suited for use in a wide variety of automotive and industrial power supplies. A proprietary low-noise switching algorithm optimizes efficiency with input voltages that are above, below, or even equal to the output voltage, ensuring seamless transitions between operational modes. Programmable frequency PWM mode operation provides low noise, high-efficiency operation and the ability to synchronize switching to an external clock. Switching frequencies up to 2MHz are supported, allowing the use of small value inductors for miniaturization of the application circuit. Applications include 24V/28V industrial applications, automotive power systems, telecom, servers, and networking equipment, firewire regulators, and multiple power source supplies.

• Wide VIN range from 2.7V to 40V, up to 95% efficiency
• Wide VOUT range from 2.7V to 40V, ultralow noise buck-boost PWM
• Internal soft-start, programmable input undervoltage lockout
• Input quiescent current in burst mode operation is 50µA typ at (VFB = 1.1V (not switching))
• Oscillator frequency is 1000KHz typ at (RT = 35.7k, VPWM/SYNC = high, TA = 25°C)
• Input current in shutdown is 3µA typ at (VRUN = 0V, TA = 25°C)
• Inductor current limit is 3A typ at (TA = 25°C)
• VCC current limit is 110mV typ at (VCC = 2.5V, TA = 25°C)
• VCC load regulation is 1.2% typ at (IVCC = 1mA to 20mA, TA = 25°C)
• Operating junction temperature range from -40°C to 150°C, 20-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