LTC2926 - MOSFET-Controlled Power Supply Tracker

Features

  • Flexible Power Supply Tracking and Sequencing
  • Adjustable Ramp Rates, Offsets and Time Delays
  • Controls Three Supplies with Series MOSFETs
  • Integrated Remote Sense Switching
  • FAULT Input/Output
  • STATUS Output/Power Good Input
  • Available in 20-Lead Narrow SSOP and 20-Lead QFN (4mm × 5mm) Packages

Typical Application

LTC2926 Typical Application
LTC2926 Typical Application
LTC2926 Typical Application

Description

The LTC2926 provides a simple solution for tracking and sequencing up to three power supply rails. An N-channel MOSFET and a few resistors per channel configure the load voltages to ramp up and down together, with voltage offsets, with time delays or with different ramp rates.

Automatic remote sense switching compensates for voltage drops across the MOSFETs. The LTC2926 provides two integrated switches as well as a signal to control optional additional external N-channel MOSFET sense switches.

The LTC2926 includes I/O signals for communication with other devices. The status output asserts after tracking and sequencing have completed. A low voltage on the power good input after an adjustable timeout period causes load disconnect. A low voltage on the fault I/O causes immediate load disconnect. Until it is reset, a fault latch prevents tracking and keeps the loads disconnected.

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
LTC2926CGN#PBF SSOP-20 GN C 05-08-1641 (GN20) Yes
LTC2926CGN#TRPBF SSOP-20 GN C 05-08-1641 (GN20) Yes
LTC2926CUFD#PBF 4x5 QFN-20 UFD C 05-08-1711 Yes
LTC2926CUFD#TRPBF 4x5 QFN-20 UFD C 05-08-1711 Yes
LTC2926IGN#PBF SSOP-20 GN I 05-08-1641 (GN20) Yes
LTC2926IGN#TRPBF SSOP-20 GN I 05-08-1641 (GN20) Yes
LTC2926IUFD#PBF 4x5 QFN-20 UFD I 05-08-1711 Yes
LTC2926IUFD#TRPBF 4x5 QFN-20 UFD I 05-08-1711 Yes


LTC2926 Package Drawing
LTC2926 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
LTC2926CGN#PBF SSOP-20 C $5.00 $3.50 Yes
LTC2926CGN#TRPBF SSOP-20 C $3.56 Yes
LTC2926CUFD#PBF 4x5 QFN-20 C $5.00 $3.50 Yes
LTC2926CUFD#TRPBF 4x5 QFN-20 C $3.50 Yes
LTC2926IGN#PBF SSOP-20 I $6.00 $4.20 Yes
LTC2926IGN#TRPBF SSOP-20 I $4.26 Yes
LTC2926IUFD#PBF 4x5 QFN-20 I $6.00 $4.20 Yes
LTC2926IUFD#TRPBF 4x5 QFN-20 I $4.26 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
DC948A LTC2926 | MOSFET-Controller Pwr Supply Tracker $50.00
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Click here to view our complete list of demo boards

Applications

  • VCORE and VI/O Supply Tracking
  • Microprocessor, DSP and FPGA Supplies
  • Servers
  • Communications Systems

 

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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:
LTC2926

Technical Support