High Efficiency Low-Side Controller with True Shutdown


Product details


Vin (Min) (V) 5 Vin (Max) (V) 18 Vout (Min) (V) 6 Vout (Max) (V) 20 Regulated outputs (#) 1 Switching frequency (Min) (kHz) 400 Switching frequency (Max) (kHz) 400 Iq (Typ) (mA) 1.4 Features Enable, Load Disconnect Duty cycle (Max) (%) 85 Rating Catalog Operating temperature range (C) -40 to 125 open-in-new Find other Boost controllers (external switch)

Package | Pins | Size

WQFN (NKL) 10 6 mm² 2.7 x 2.4 open-in-new Find other Boost controllers (external switch)


  • 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
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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.

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Technical documentation

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Type Title Date
* Data sheet LM3017 High Efficiency Low-Side Controller With True Shutdown datasheet (Rev. D) Sep. 30, 2016
Technical article How to add overvoltage protection to a synchronous boost controller Sep. 17, 2018
Application note Automated Frequency Response Analyzer Oct. 09, 2013
User guide AN-2212 LM3017 Evaluation Board Sep. 12, 2012

Design & development

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Hardware development


The LM3017EVM evaluation module (EVM) provides the design engineer with a fully functional asynchronous boost converter to evaluate the Texas Instruments LM3017LE boost controller IC. The EVM provides 15V output at up to 1A current from an 8V to 12V input. This EVM demonstrates the flexibility of (...)

  • 8V to 12V input voltage range
  • 15V Output Voltage (default setting)
  • Up to 1000 mA Output Current
  • 600 KHz Fixed Switching Frequency
  • Low Shutdown Current (<1uA)

Design tools & simulation

SNOM459.ZIP (76 KB) - PSpice Model
SNOM573.ZIP (4 KB) - PSpice Model
PSpice® for TI design and simulation tool
PSPICE-FOR-TI — PSpice® for TI is a design and simulation environment that helps evaluate functionality of analog circuits. This full-featured, design and simulation suite uses an analog analysis engine from Cadence®. Available at no cost, PSpice for TI includes one of the largest model libraries in the (...)
  • Leverages Cadence PSpice Technology
  • Preinstalled library with a suite of digital models to enable worst-case timing analysis
  • Dynamic updates ensure you have access to most current device models
  • Optimized for simulation speed without loss of accuracy
  • Supports simultaneous analysis of multiple products
  • (...)
Fly-Buck and Flyback Topology Selector
FLYBUCK-FLYBACK-DESIGN-CALC This tool helps a power supply engineer to select the right isolated DC-DC topology based on the specifications. Depending on the topology chosen, the calculator also recommends the right IC for the design.
  • Features isolated topologies like Fly-Buck™, Fly-Buck-Boost, DCM and CCM Flyback
  • Capability to design up to 6 isolated outputs
  • Recommends ICs for desired application design
  • Incorporates loop compensation in designs
  • Compares efficiency, external component count and transformer currents for every topology (...)

CAD/CAE symbols

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WQFN (NKL) 10 View options

Ordering & quality

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