LM3017 High Efficiency Low-Side Controller with True Shutdown | TI.com

LM3017 (ACTIVE) High Efficiency Low-Side Controller with True Shutdown

 

Description

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.

Features

  • 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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WEBENCH® Designer LM3017

  Min   Max Range
Vin  V 5.0 to 18.0V
Vout  V 5.5 to 120V
Iout  A ≤ 20A
Ambient Temp  °C -40 to 125°C

Parametrics

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Part number Order Vin (Min) (V) Vin (Max) (V) Vout (Min) (V) Vout (Max) (V) Regulated outputs (#) Switching frequency (Min) (kHz) Switching frequency (Max) (kHz) Iq (Typ) (mA) Features Duty cycle (Max) (%) Operating temperature range (C) Rating Type Package Group
LM3017 Order now 5     18     6     20     1     400     400     1.4     Enable
Load Disconnect    
85     -40 to 125     Catalog     Controller     WQFN | 10    
LM3478 Order now 2.97     40     1.26     500     1     100     1000     2.7     Adjustable Current Limit
Enable
Frequency Synchronization
Light Load Efficiency
Pre-Bias Start-Up    
100     -40 to 125     Catalog     Controller     SOIC | 8
VSSOP | 8    
LM3481 Order now 2.97     48     1.275     500     1     100     1000     3.7     Adjustable Current Limit
Enable
Frequency Synchronization
Light Load Efficiency
Pre-Bias Start-Up
UVLO Adjustable    
85     -40 to 125     Catalog     Controller     VSSOP | 10    
LM3488 Order now 2.97     40     1.26     500     1     100     1000     2.7     Adjustable Current Limit
Enable
Frequency Synchronization
Light Load Efficiency
Pre-Bias Start-Up    
100     -40 to 125     Catalog     Controller     VSSOP | 8    
LM5022 Order now 6     60     1.25     300     1     170     2200     3.5     Enable
Frequency Synchronization
UVLO Adjustable    
90     -40 to 125     Catalog     Controller     VSSOP | 10    
TPS40210 Order now 4.5     52     5     300     1     35     1000       Enable
Frequency Synchronization    
95     -40 to 125