LTC1154 - High-Side Micropower MOSFET Driver

Features

  • Fully Enhances N-Channel Power MOSFETs
  • 8µA IQ Standby Current
  • 85µA IQ ON Current
  • No External Charge Pump Capacitors
  • 4.5V to 18V Supply Range
  • Short-Circuit Protection
  • Thermal Shutdown via PTC Thermistor
  • Status Output Indicates Shutdown
  • Available in 8-Pin SOIC

Typical Application

LTC1154 Typical Application
LTC1154 Typical Application

Description

The LTC1154 single high-side gate driver allows using low cost N-channel FETs for high-side switching applications. An internal charge pump boosts the gate drive voltage above the positive rail, fully enhancing an N-channel MOS switch with no external components. Micropower operation, with 8µA standby current and 85µA operating current, allows use in virtually all systems with maximum efficiency.

Included on chip is programmable over-current sensing. A time delay can be added to prevent false triggering on high in-rush current loads. An active high shutdown input is also provided and interfaces directly to a standard PTC thermistor for thermal shutdown. An open-drain output is provided to report switch status to the µP. An active low enable input is provided to control multiple switches in banks.

The LTC1154 is ailable in both 8-pin DIP and 8-pin SOIC packages.

Packaging

CAD Symbols and Footprints: The downloadable Zip file below contains the schematic symbol and PCB footprints.

For complete and up to date package information and drawings, please refer to our packaging page

Part Number Package Code Temp Package
Drawing
RoHS
LTC1154CN8#PBF N-8 N C 05-08-1510 (N8) Yes
LTC1154CS8#PBF SO-8 S8 C 05-08-1610 (S8) Yes
LTC1154CS8#TRPBF SO-8 S8 C 05-08-1610 (S8) Yes
LTC1154HS8#PBF SO-8 S8 H 05-08-1610 (S8) Yes
LTC1154HS8#TRPBF SO-8 S8 H 05-08-1610 (S8) Yes


LTC1154 Package Drawing
LTC1154 Package Drawing

Order Info

  • Part numbers ending in PBF are lead free. Solder plated terminal finish (SnPb) versions are non-standard and special terms and conditions and pricing applies if available. Please contact LTC marketing for information.
  • Part numbers containing TR or TRM are shipped in tape and reel or 500 unit mini tape and reel, respectively
  • Please refer to our general ordering information or the product datasheet for more details

Package Variations and Pricing

Part Number Package Temp Price
(1-99)
Price
(1k)*
RoHS
LTC1154CN8#PBF N-8 C $2.15 $1.80 Yes
LTC1154CS8#PBF SO-8 C $2.35 $1.90 Yes
LTC1154CS8#TRPBF SO-8 C $1.96 Yes
LTC1154HS8#PBF SO-8 H $3.36 $2.35 Yes
LTC1154HS8#TRPBF SO-8 H $2.41 Yes
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* The USA list pricing shown is for BUDGETARY USE ONLY, shown in United States dollars (FOB USA per unit for the stated volume), and is subject to change. International prices may differ due to local duties, taxes, fees and exchange rates. For volume-specific price or delivery quotes, please contact your local Linear Technology sales office or authorized distributor.

Demo Boards

Linear Technology offers many demo boards free of charge to qualified customers. Contact your local sales office or distributor to inquire about a demo board. Certain demo boards are also available for sale via credit card on this website. Demo boards are for evaluation purposes only. It remains the customer’s responsibility to verify proper and reliable operation in the actual end application.

Click here to view our complete list of demo boards

Applications

  • Laptop Computer Power Switching
  • SCSI Termination Power Switching
  • Cellular Telephone Power Management
  • Battery Charging and Management
  • High-Side Industrial and Automotive Switching
  • Stepper Motor and DC Motor Control

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Design Tools

LTspice

LTspice® software is a powerful, fast and free simulation tool, schematic capture and waveform viewer with enhancements and models for improving the simulation of switching regulators. Click here to download LTspice

Models for the following parts are available in LTspice:
LTC1154

Technical Support