High Efficiency Low-Side Controller with True Shutdown - LM3017

LM3017 (ACTIVE)

High Efficiency Low-Side Controller with True Shutdown

Description

The LM3017 is a versatile low-side NFET controller incorporating true shutdown and input side current limiting. It 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 5V to 18V accommodates a two or three cell lithium ion battery or a 12V 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 40nA from the input supply.

The LM3017 provides an adjustable output in order 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 QFN 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
  • 1A 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
  • 2.4mm × 2.7mm × 0.8mm 10-pin QFN Package

Key Specification

  • Input Voltage Range of 5V to 18V
  • 600 kHz fixed Frequency Operation
  • ±1% Reference Voltage Accuracy Over Temperature
  • Low Shutdown Current (< 1µA), 40nA Typical

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Parametrics Compare all products in Step-Up (Boost) Controller

 
Vin (Min) (V)
Vin (Max) (V)
Vout (Min) (V)
Vout (Max) (V)
Iout (Max) (A)
Switching Frequency (Max) (kHz)
Iq (Typ) (mA)
Regulated Outputs (#)
Control Mode
Brand
Market Segment
Special Features
Duty Cycle (Max) (%)
Rating
Operating Temperature Range (C)
Topology
Pin/Package
Approx. Price (US$)
LM3017 LM3478 LM3481 LM3488
5     2.95     2.97     2.95    
18     40     48     40    
6     1.26     1.275     1.26    
20          
1     1     1     1    
400     1000     1000     1000    
0.001          
1     1     1     1    
Current Mode          
SIMPLE SWITCHER     SIMPLE SWITCHER     SIMPLE SWITCHER     SIMPLE SWITCHER    
Computing & Multimedia     Industrial     Industrial     Industrial    
Enable
Load Disconnect    
Enable     Enable
Frequency Synchronization
Light Load Efficiency    
Enable
Frequency Synchronization    
85       85     100    
Catalog     Catalog     Catalog     Catalog    
-40 to 125     -40 to 125     -40 to 125     -40 to 125    
Boost
Flyback
SEPIC    
Boost
Flyback
SEPIC    
Boost
Flyback
SEPIC    
Boost
Flyback
SEPIC    
10WQFN     8SOIC
8VSSOP    
10VSSOP     8VSSOP    
0.95 | 1ku     0.80 | 1ku     0.80 | 1ku     0.80 | 1ku    

Related end equipment

  • Thunderbolt Technology™ Host Ports
  • Notebook and Desktop Computers, Tablets, and
    Other Portable Consumer Electronics
  • Hard Disc Drives, Solid State Drives
  • Offline Power Supplies
  • Set-Top Boxes

WEBENCH® LM3017
    Min   Max   Range  
  Vin V    5.00 – 18.00V  
  Vout V    5.50 – 120.00V  
  Iout A    ≤ 20.00A  
  Ambient Temp °C    ≤ 100°C  
Footprint BOM Cost Efficiency
 
 
 
'U1 Rfbb Rfbt D1 M1 L1 Rs1 Rsense Cvcc Cbyp Cin Cout Rcomp Ccomp Ccomp2 M2 '
 
What are WEBENCH® tools?

Companion parts

Part # Name Product Family Comments
TPS22980   Thunderbolt(TM) Host/Peripheral Power Mux (Also supports Thunderbolt 2)   USB Power anwd Load Switches - POWER MULTIPLEXER (MUX)    
CSD16323Q3   N-Channel NexFET™ Power MOSFET   POWER MOSFET - N-CHANNEL MOSFET TRANSISTOR    
CSD16340Q3   N Channel NexFET™ Power MOSFET   POWER MOSFET - N-CHANNEL MOSFET TRANSISTOR    
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