LT1158 - Half Bridge N-Channel Power MOSFET Driver

Features

  • Drives Gate of Top Side MOSFET Above V +
  • Operates at Supply Voltages from 5V to 30V
  • 150ns Transition Times Driving 3000pF
  • Over 500mA Peak Driver Current
  • Adaptive Non-Overlap Gate Drives
  • Continuous Current Limit Protection
  • Auto Shutdown and Retry Capability
  • Internal Charge Pump for DC Operation
  • Built-In Gate Voltage Protection
  • Compatible with Current-Sensing MOSFETs
  • TTL/CMOS Input Levels
  • Fault Output Indication

Typical Application

LT1158 Typical Application
LT1158 Typical Application

Description

A single input pin on the LT1158 synchronously controls two N-channel power MOSFETs in a totem pole configuration. Unique adaptive protection against shoot-through currents eliminates all matching requirements for the two MOSFETs. This greatly eases the design of high efficiency motor control and switching regulator systems.

A continuous current limit loop in the LT1158 regulates short-circuit current in the top power MOSFET. Higher start-up currents are allowed as long as the MOSFET VDS does not exceed 1.2V. By returning the fault output to the enable input, the LT1158 will automatically shut down in the event of a fault and retry when an internal pull-up current has recharged the enable capacitor.

An on-chip charge pump is switched in when needed to turn on the top N-channel MOSFET continuously. Special circuitry ensures that the top side gate drive is safely maintained in the transition between PWM and DC opera-tion. The gate-to-source voltages are internally limited to 14.5V when operating at higher supply voltages.

Packaging

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

SO-16, N-16

LT1158 Package Drawing
LT1158 Package Drawing

Order Info

Package Variations and Pricing

Part Number Package Pins Temp Price (1-99) Price (1k)* RoHS Data
LT1158CN#PBF 16 C $3.92 $3.30 View
LT1158CSW#PBF SO 16 C $4.17 $3.50 View
LT1158CSW#TRPBF SO 16 C $3.56 View
LT1158IN#PBF 16 I $4.50 $3.75 View
LT1158ISW#PBF SO 16 I $4.83 $4.10 View
LT1158ISW#TRPBF SO 16 I $4.16 View
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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

  • PWM of High Current Inductive Loads
  • Half Bridge and Full Bridge Motor Control
  • Synchronous Step-Down Switching Regulators
  • Three-Phase Brushless Motor Drive
  • High Current Transducer Drivers
  • Battery-Operated Logic-Level MOSFETs

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Design Tools

LTspiceIV

LTspice IV 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 IV

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Models for the following parts are available in LTspice IV:
LT1158

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