Power Management Switching Regulator Step-Down (Buck) Regulators Internal Power Switch Buck

LT1612 - Synchronous, Step-Down 800kHz PWM DC/DC Converter

Features

  • Operates from Input Voltage As Low As 2V
  • Internal 0.7A Synchronous Switches
  • Uses Ceramic Input and Output Capacitors
  • 620mV Reference Voltage
  • 800kHz Fixed Frequency Switching
  • Programmable Burst Mode Operation
  • Low Quiescent Current: 160µA
  • 8-Lead MSOP or SO Package

Typical Application

LT1612 Typical Application
LT1612 Typical Application

Description

The LT1612 is an 800kHz, synchronous step-down DC/DC converter that operates from an input voltage as low as 2V. Internal 0.45Ohms switches deliver output currents up to 500mA, and the 800kHz switching frequency allows the use of small, low value ceramic input and output capacitors. Input voltage ranges from 5.5V down to 2V and output voltage can be set as low as the 620mV reference. The device features Burst Mode operation, keeping efficiency high at light loads. Burst Mode operation can be defeated by pulling the MODE pin high, enabling constant switching throughout the load range for low noise.

No-load quiescent current is 160µA and shutdown current is less than 1µA. The device is available in 8-lead SO and MSOP 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
LT1612EMS8#PBF MS-8 MS8 E 05-08-1660 Yes
LT1612EMS8#TRPBF MS-8 MS8 E 05-08-1660 Yes
LT1612ES8#PBF SO-8 S8 E 05-08-1610 (S8) Yes
LT1612ES8#TRPBF SO-8 S8 E 05-08-1610 (S8) Yes


LT1612 Package Drawing
LT1612 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
LT1612EMS8#PBF MS-8 E $2.58 $2.20 Yes
LT1612EMS8#TRPBF MS-8 E $2.26 Yes
LT1612ES8#PBF SO-8 E $2.30 $1.96 Yes
LT1612ES8#TRPBF SO-8 E $2.02 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

  • Portable Devices
  • Lithium-Ion Step-Down Converters
  • 5V to 3.3V Conversion
  • 2-Cell Alkaline Step-Down Converters

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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:
LT1612

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