LT1534 - Ultralow Noise 2A Switching Regulator

Features

  • Greatly Reduced Conducted and Radiated EMI
  • Low Switching Harmonic Content
  • Independent Control of Switch Voltage and Current Slew Rates
  • 2A Current Limited Power Switch
  • Regulates Positive and Negative Voltages
  • 20kHz to 250kHz Oscillator Frequency
  • Easily Synchronized to External Clock
  • Wide Input Voltage Range: 2.7V to 23V
  • Low Shutdown Current: 12µA Typical
  • Easier Layout than with Conventional Switchers

Typical Application

LT1534 Typical Application
LT1534 Typical Application

Description

The LT1534/LT1534-1 are a new class of switching regulator designed to reduce conducted and radiated electromagnetic interference (EMI). Ultralow noise and EMI are achieved by providing user control of the output switch slew rates. Voltage and current slew rates can be independently programmed to optimize switcher harmonic content versus efficiency.

The LT1534/LT1534-1 can reduce high frequency harmonic power by as much as 40dB with only minor losses in efficiency. The LT1534/LT1534-1 utilize a current mode architecture optimized for low noise boost topologies. The ICs include a 2A power switch along with all necessary oscillator, control and protection circuitry. Unique error amp circuitry can regulate both positive and negative voltages. The internal oscillator may be synchronized to an external clock for more accurate placement of switching harmonics. Protection features include cycle-by-cycle current limit protection, undervoltage lockout and thermal shutdown.

Low minimum supply voltage and low supply current during shutdown make the LT1534/LT1534-1 well suited for portable applications. The LT1534/LT1534-1 are available in the 16-pin narrow SO package.

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
LT1534CS-1#PBF SO-16 S C 05-08-1610 (S16) Yes
LT1534CS-1#TRPBF SO-16 S C 05-08-1610 (S16) Yes
LT1534CS#PBF SO-16 S C 05-08-1610 (S16) Yes
LT1534CS#TRPBF SO-16 S C 05-08-1610 (S16) Yes
LT1534IS-1#PBF SO-16 S I 05-08-1610 (S16) Yes
LT1534IS-1#TRPBF SO-16 S I 05-08-1610 (S16) Yes
LT1534IS#PBF SO-16 S I 05-08-1610 (S16) Yes
LT1534IS#TRPBF SO-16 S I 05-08-1610 (S16) Yes


LT1534 Package Drawing
LT1534 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
LT1534CS-1#PBF SO-16 C $4.65 $3.93 Yes
LT1534CS-1#TRPBF SO-16 C $3.99 Yes
LT1534CS#PBF SO-16 C $4.70 $3.95 Yes
LT1534CS#TRPBF SO-16 C $4.01 Yes
LT1534IS-1#PBF SO-16 I $5.85 $4.95 Yes
LT1534IS-1#TRPBF SO-16 I $5.01 Yes
LT1534IS#PBF SO-16 I $5.40 $4.55 Yes
LT1534IS#TRPBF SO-16 I $4.61 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

  • Precision Instrumentation Systems
  • Isolated Supplies for Industrial Automation
  • Medical Instruments
  • Wireless Communications
  • Single Board Data Acquisition Systems

Product Notifications

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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:
LT1534
LT1534-1

Technical Support