LT3495 - 650mA Micropower Low Noise Boost Converter with Output Disconnect

Features

  • Low Quiescent Current
       60μA in Active Mode
       0.1μA in Shutdown Mode
  • Low Noise Control Scheme (Switching Frequency Always Stays Above Audible Range for LT3495/-1)
  • Integrated Power NPN:
       650mA Current Limit (LT3495/B)
       350mA Current Limit (LT3495-1/B-1)
  • Integrated Output Disconnect
  • Integrated Output Dimming
  • Wide input range: 2.5V to 16V
  • Wide output range : Up to 40V
  • Integrated feedback resistor
  • Tiny 10-Lead 3mm × 2mm DFN Package

Typical Application

LT3495 Typical Application
LT3495 Typical Application
LT3495 Typical Application

Description

The LT3495/LT3495B/LT3495-1/LT3495B-1 are low noise boost converters with integrated power switch, feedback resistor and output disconnect circuitry. The parts control power delivery by varying both the peak inductor current and switch off-time. This novel* control scheme results in low output voltage ripple as well as high efficiency over a wide load range. For the LT3495/LT3495-1, the off-time of the switch is not allowed to exceed a fixed level, guaranteeing the switching frequency stays above the audio band for the entire load range. The parts feature a high performance NPN power switch with a 650mA and 350mA current limit for the LT3495/LT3495B and LT3495-1/LT3495B-1 respectively. The quiescent current is a low 60μA, which is further reduced to 0.1μA in shutdown. The internal disconnect circuitry allows the output voltage to be isolated from the input during shutdown. An auxiliary reference input (CTRL pin) overrides the internal 1.235V feedback reference with any lower value allowing full control of the output voltage during operation. The LT3495 series are available in a tiny 10-lead 3mm × 2mm DFN 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
LT3495BEDDB-1#PBF 3x2 DFN-10 DDB E 05-08-1722 Yes
LT3495BEDDB-1#TRMPBF 3x2 DFN-10 DDB E 05-08-1722 Yes
LT3495BEDDB-1#TRPBF 3x2 DFN-10 DDB E 05-08-1722 Yes
LT3495BEDDB#PBF 3x2 DFN-10 DDB E 05-08-1722 Yes
LT3495BEDDB#TRMPBF 3x2 DFN-10 DDB E 05-08-1722 Yes
LT3495BEDDB#TRPBF 3x2 DFN-10 DDB E 05-08-1722 Yes
LT3495EDDB-1#PBF 3x2 DFN-10 DDB E 05-08-1722 Yes
LT3495EDDB-1#TRMPBF 3x2 DFN-10 DDB E 05-08-1722 Yes
LT3495EDDB-1#TRPBF 3x2 DFN-10 DDB E 05-08-1722 Yes
LT3495EDDB#PBF 3x2 DFN-10 DDB E 05-08-1722 Yes
LT3495EDDB#TRMPBF 3x2 DFN-10 DDB E 05-08-1722 Yes
LT3495EDDB#TRPBF 3x2 DFN-10 DDB E 05-08-1722 Yes


LT3495 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
LT3495BEDDB-1#PBF 3x2 DFN-10 E $2.50 Yes
LT3495BEDDB-1#TRMPBF 3x2 DFN-10 E $2.50 $1.80 Yes
LT3495BEDDB-1#TRPBF 3x2 DFN-10 E $2.50 $1.75 Yes
LT3495BEDDB#PBF 3x2 DFN-10 E $2.50 Yes
LT3495BEDDB#TRMPBF 3x2 DFN-10 E $2.50 $1.80 Yes
LT3495BEDDB#TRPBF 3x2 DFN-10 E $2.50 $1.75 Yes
LT3495EDDB-1#PBF 3x2 DFN-10 E $2.50 Yes
LT3495EDDB-1#TRMPBF 3x2 DFN-10 E $2.50 $1.80 Yes
LT3495EDDB-1#TRPBF 3x2 DFN-10 E $2.50 $1.75 Yes
LT3495EDDB#PBF 3x2 DFN-10 E $2.50 Yes
LT3495EDDB#TRMPBF 3x2 DFN-10 E $2.50 $1.80 Yes
LT3495EDDB#TRPBF 3x2 DFN-10 E $2.50 $1.75 Yes
Buy NowRequest Samples
* 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
DC1219A-A LT3495EDDB Demo Board | 3-6Vin to 15Vout at 75mA $75.00
DC1219A-B LT3495BEDDB Demo Board | Micropower 3-6Vin to 15Vout at 75mA $75.00
DC1219A-C LT3495EDDB-1 Demo Board | Micropower 3-6Vin to 15Vout at 36mA $75.00
DC1219A-D LT3495BEDDB-1 Demo Board | 3-6Vin to 15Vout at 36mA $75.00
Buy Now
Click here to view our complete list of demo boards

Applications

  • OLED Power
  • Low Noise Power
  • MP3 Player

Product Notifications

Please login to your MyLinear account for notifications of datasheet updates, new document releases and LTspice model announcements for your favorite products. If you do not have a MyLinear account you may Sign Up Now.

Forgot your password? Click here.
Need help? Email mylinear@linear.com with questions and comments.

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:

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

Models for the following parts are available in LTspice:
LT3495
LT3495-1
LT3495B
LT3495B-1

Technical Support