Power Management Switching Regulator Inverting Regulators
Power Management Switching Regulator LCD/CCD/OLED Bias

LT1617 - Micropower Inverting DC/DC Converters in SOT-23

Features

  • Low Quiescent Current:
    20µA in Active Mode
    <1µA in Shutdown Mode
  • Operates with VIN as Low as 1V
  • Low VCESAT Switch: 250mV at 300mA
  • Uses Small Surface Mount Components
  • High Output Voltage: Up to –34V
  • Tiny 5-Lead SOT-23 Package

Typical Application

LT1617 Typical Application
LT1617 Typical Application

Description

The LT1617/LT1617-1 are micropower inverting DC/DC converters in a 5-lead SOT-23 package. The LT1617 is designed for higher power systems with a 350mA current limit and an input voltage range of 1.2V to 15V, whereas the LT1617-1 is intended for lower power and single-cell applications with a 100mA current limit and an extended input voltage range of 1V to 15V. Otherwise, the two devices are functionally equivalent. Both devices feature a quiescent current of only 20µA at no load, which further reduces to 0.5µA in shutdown. A current limited, fixed off-time control scheme conserves operating current, resulting in high efficiency over a broad range of load current. The 36V switch allows high voltage outputs up to –34V to be easily generated without the use of costly transformers. The LT1617’s low off-time of 400ns permits the use of tiny, low profile inductors and capacitors to minimize footprint and cost in space-conscious portable applications.

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
LT1617ES5-1#PBF SOT-23 S5 E 05-08-1635 Yes
LT1617ES5-1#TRMPBF SOT-23 S5 E 05-08-1635 Yes
LT1617ES5-1#TRPBF SOT-23 S5 E 05-08-1635 Yes
LT1617ES5#PBF SOT-23 S5 E 05-08-1635 Yes
LT1617ES5#TRMPBF SOT-23 S5 E 05-08-1635 Yes
LT1617ES5#TRPBF SOT-23 S5 E 05-08-1635 Yes


LT1617 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
LT1617ES5-1#PBF SOT-23 E $2.11 Yes
LT1617ES5-1#TRMPBF SOT-23 E $2.11 $1.72 Yes
LT1617ES5-1#TRPBF SOT-23 E $2.11 $1.70 Yes
LT1617ES5#PBF SOT-23 E $2.11 Yes
LT1617ES5#TRMPBF SOT-23 E $2.11 $1.72 Yes
LT1617ES5#TRPBF SOT-23 E $2.11 $1.70 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

  • LCD Bias
  • Handheld Computers
  • Battery Backup
  • Digital Cameras

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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:
LT1617
LT1617-1

Technical Support