LTC3832 - High Power Step-Down Synchronous DC/DC Controllers for Low Voltage Operation

Features

  • VOUT as Low as 0.6V
  • High Power Switching Regulator Controller for 3.3V-5V to 0.6V-3.xV Step-Down Applications
  • No Current Sense Resistor Required
  • Low Input Supply Voltage Range: 3V to 8V
  • Maximum Duty Cycle >91% Over Temperature
  • All N-Channel External MOSFETs
  • Excellent Output Regulation: ±1% Over Line, Load and Temperature Variations
  • High Efficiency: Over 95% Possible
  • Adjustable or Fixed 2.5V Output (LTC3832)
  • Programmable Fixed Frequency Operation: 100kHz to 500kHz
  • External Clock Synchronization
  • Soft-Start
  • Low Shutdown Current: <10µA
  • Overtemperature Protection
  • Available in SO-8 and SSOP-16 Packages

Typical Application

LTC3832 Typical Application
LTC3832 Typical Application

Description

The LTC3832/LTC3832-1 are high power, high efficiency switching regulator controllers optimized for 3.3V-5V to 0.6V-3.xV step-down applications. A precision internal reference and feedback system provide ±1% output regulation over temperature, load current and line voltage variations. The LTC3832/LTC3832-1 use a synchronous switching architecture with N-channel MOSFETs. Additionally, the chip senses output current through the drain-source resistance of the upper N-channel MOSFET, providing an adjustable current limit without a current sense resistor.

The LTC3832/LTC3832-1 operate with an input supply voltage as low as 3V and with a maximum duty cycle of >91% over temperature. They include a fixed frequency PWM oscillator for low output ripple operation. The 300kHz free-running clock frequency can be externally adjusted or synchronized with an external signal from 100kHz to 500kHz. In shutdown mode, the LTC3832 supply current drops to <10µA. The LTC3832-1 is the SO-8 version without current limit, frequency adjustment and shutdown functions.

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
LTC3832-1ES8#PBF SO-8 S8 E 05-08-1610 (S8) Yes
LTC3832-1ES8#TRPBF SO-8 S8 E 05-08-1610 (S8) Yes
LTC3832EGN#PBF SSOP-16 GN E 05-08-1641 (GN16) Yes
LTC3832EGN#TRPBF SSOP-16 GN E 05-08-1641 (GN16) Yes


LTC3832 Package Drawing
LTC3832 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
LTC3832-1ES8#PBF SO-8 E $4.20 $2.95 Yes
LTC3832-1ES8#TRPBF SO-8 E $3.01 Yes
LTC3832EGN#PBF SSOP-16 E $4.46 $3.10 Yes
LTC3832EGN#TRPBF SSOP-16 E $3.16 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.

Part Number Description Price Documentation
DC469B LTC3832EGN/-1ES8 | High Efficiency Step-Down Power Supply, 3.1V to 8V Input, 2.5/1.8/1.5Vout @ 12A $125.00
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Click here to view our complete list of demo boards

Applications

  • CPU Power Supplies
  • Multiple Logic Supply Generator
  • Distributed Power Applications
  • High Efficiency Power Conversion

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

To launch a ready to run LTspice demonstration circuit for this part:

  • Step 1: If you have not installed LTspice on this computer, download and install LTspice
  • Step 2: Once LTspice is installed, click on the link(s) below to launch the simulation
  • Step 3: If LTspice does not automatically open after clicking the link above, you can instead run the simulation by right clicking on the link and selecting "Save Target As." After saving the file to your computer, start LTspice and open the demonstration circuit by selecting 'Open' from the 'File' menu

To explore other ready to run LTspice demonstration circuits, please visit our Demo Circuits Collection.

Models for the following parts are available in LTspice:
LTC3832
LTC3832-1

Technical Support