The LM3017 device is a versatile low-side NFET controller incorporating true shutdown and input side current limiting. The LM3017 is designed for simple implementation of boost conversions in Thunderbolt™ Technology. The LM3017 can also be configured for flyback or SEPIC designs. The input voltage range of 5 V to 18 V accommodates a two- or three-cell lithium ion battery or a 12-V rail. The enable pin accepts a single input to drive three different modes of operation: boost, pass-through, or shutdown mode. The LM3017 draws very low current in shutdown mode, typically 40 nA from the input supply.
●The LM3017 provides an adjustable output to drive the Power Load Switch or MUX for the host Thunderbolt™ port. The ability to drive an external high-side NMOS provides for true isolation of the load from the input. Current limiting on the input ensures that inrush and short-circuit currents are always under control. The LM3017 incorporates built-in thermal shutdown, cycle-by-cycle current limit, short-circuit protection, output overvoltage protection, and soft start. It is available in a 10-pin WQFN package.
● Fully Compliant to Thunderbolt™ Technology Specifications
● True Shutdown for Short-Circuit Protection
● Input Side Current Limit
● Single Enable Pin With Three Modes of Operation: Boost, Pass-Through, or Shutdown
● Built-in Charge Pump for High-Side NFET Disconnect Switch
● 1-A Push-Pull Driver for Low-Side NFET
● Peak Current Mode Control
● Simple Slope Compensation
● Protection Features: Thermal Shutdown, Cycle-by-Cycle Current Limit, Short-Circuit Protection, Output Overvoltage Protection, and Latch-Off
● Internal Soft Start
● Input Voltage Range: 5 V to 18 V
● 600-kHz Fixed Frequency Operation
● ±1% Reference Voltage Accuracy Over Temperature
● Low Shutdown Current (< 1 µA), 40 nA Typical
● 2.4 mm × 2.7 mm × 0.8 mm, 10-Pin WQFN Package
