Monitor, Control and Protection High Side Switches & MOSFET Drivers

LTC1156 - Quad High Side Micropower MOSFET Driver with Internal Charge Pump

Features

  • No External Charge Pump Components
  • Fully Enhances N-Channel Power MOSFETs
  • 16 Microamps Standby Current
  • 95 Microamps ON Current
  • Wide Power Supply Range 4.5V to 18V
  • Controlled Switching ON and OFF Times
  • Replaces P-Channel High Side Switches
  • Compatible with Standard Logic Families
  • Available in 16-pin SOL Package

Typical Application

LTC1156 Typical Application
LTC1156 Typical Application

Description

The LTC1156 quad 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 opera-tion, with 16µA standby current and 95µA operating current, allows use in virtually all systems with maximum efficiency.

Included on chip is independent over-current sensing to provide automatic shutdown in case of short circuits. A time delay can be added to the current sense to prevent false triggering on high in-rush current loads.

The LTC1156 operates off of a 4.5V to 18V supply and is well suited for battery-powered applications, particularly where micropower "sleep" operation is required.

The LTC1156 is available in both 16-pin DIP and 16-pin SOL 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
LTC1156CN#PBF N-16 N C 05-08-1510 (N16) Yes
LTC1156CSW#PBF SW-16 SW C 05-08-1620 (SW16) Yes
LTC1156CSW#TRPBF SW-16 SW C 05-08-1620 (SW16) Yes


LTC1156 Package Drawing
LTC1156 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
LTC1156CN#PBF N-16 C $5.80 $4.75 Yes
LTC1156CSW#PBF SW-16 C $6.25 $5.15 Yes
LTC1156CSW#TRPBF SW-16 C $5.21 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
  • P-Channel Switch Replacement
  • Battery Charging and Management
  • Low Frequency H-Bridge Driver
  • 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:
LTC1156

Technical Support