LTC3118HFE#PBF

LTC3118HFE#PBF is a dual-input, wide voltage range synchronous buck-boost DC/DC converter with intelligent, integrated, low-loss PowerPath control. The unique power switch architecture provides efficient operation from either input source to a programmable output voltage above, below, or equal to the input. Voltage capability of up to 18V provides flexibility and voltage margin for a wide variety of applications and power sources. The LTC3118 uses a low-noise, current-mode architecture with a fixed 1.2MHz PWM mode frequency that minimizes the solution footprint. For high efficiency at light loads, automatic Burst Mode operation can be selected, consuming only 50µA of quiescent current in sleep. Applications include systems with multiple input sources, backup power systems, wall adapter or Li-Ion(s) input to 5VOUT, battery or super capacitor input for reserve power, and replacement of diode-OR designs with higher efficiency, flexibility, and performance.

• Integrated High Efficiency Dual Input PowerPath™ plus buck-boost DC/DC converter
• Ideal diode or priority VIN select modes, VIN1 and VIN2 range from 2.2V to 18V
• VOUT range from 2V to 18V, current mode control
• All internal N-channel MOSFETs, Pin-Selectable PWM or Burst Mode® operation
• Accurate, independent RUN pin thresholds, up to 94% efficiency
• Input quiescent current in shutdown is 2µA typical at (RUN1 and RUN2 < 0.2V)
• Input quiescent current in burst mode operation is 50µA typical at (active VIN1 or VIN2, FB = 1.2V)
• Oscillator frequency is 1200KHz typical
• VCC current limit is 60mA typical at (VIN > 6V, TJ ≈ TA = 25°C)
• Operating junction temperature range from -40°C to 150°C, 28-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