LTC2927 - Single Power Supply Tracking Controller

By forcing current into a feedback node of an independent supply, the LTC2927 causes the output to track a ramp signal without inserting any pass element losses. Because the current is controlled in an open-loop manner, the LTC2927 does not affect the transient response or stability of the supply. The compact solution at point of load minimizes the trace length of the DC/DC circuit sensitive FB node. Furthermore, it presents a high impedance when power-up is complete, effectively removing it from the DC/DC circuit.

Features
  • Flexible Power Supply Tracking
  • Tracks Both Up and Down
  • Power Supply Sequencing
  • Supply Stability is Not Affected
  • Low Pin Count
  • Controls Single Supply without Series FETs
  • Adjustable Ramp Rate
  • Available in 8-Lead ThinSOT and 8-Lead (3mm × 2mm) DFN Packages
Typical Application

Applications
  • VCORE and VI/O Supply Tracking
  • Microprocessor, DSP and FPGA Supplies
  • Multiple Supply Systems
  • Point-of-Load Supplies
Packaging

Order Information
Part NumberPackageTempPrice(1-99)Price (1k)*
LTC2927CDDB#PBF3x2 DFN-8C$2.30
LTC2927CDDB#TRMPBF3x2 DFN-8C$2.30$1.63
LTC2927CDDB#TRPBF3x2 DFN-8C$2.30$1.61
LTC2927CTS8#PBFSOT-23C$2.30
LTC2927CTS8#TRMPBFSOT-23C$2.30$1.63
LTC2927CTS8#TRPBFSOT-23C$2.30$1.61
LTC2927IDDB#PBF3x2 DFN-8I$2.73
LTC2927IDDB#TRMPBF3x2 DFN-8I$2.73$1.93
LTC2927IDDB#TRPBF3x2 DFN-8I$2.73$1.91
LTC2927ITS8#PBFSOT-23I$2.73
LTC2927ITS8#TRMPBFSOT-23I$2.73$1.93
LTC2927ITS8#TRPBFSOT-23I$2.73$1.91
Demo Boards
Part NumberDescriptionPrice
DC817ALTC2927 | Single Pwr Supply Tracking Controller$50.00
Datasheet
Design Note
Reliability Data
LT Journal
Press Release
Related Product
LTC2927 - Single Power Supply Tracking Controller
LTC2927 Package Drawing LTC2927
DN389 - 利用纤巧型负载点电路来简化电源电压的跟踪和排序
R413 Reliability Data
Sep 2005 Supply Tracking and Sequencing at Point-of-Load: Easy Design without the Drawbacks of MOSFETs
用于分布式负载点应用的简单电源跟踪
LTC2927 Footprints and Symbols