LTC2952 - Pushbutton PowerPath Controller with Supervisor

Features

  • Pushbutton On/Off Control
  • Automatic Low Loss Switchover Between DC Sources
  • Wide Operating Voltage Range: 2.7V to 28V
  • Low 25μA Shutdown Current
  • Guaranteed Threshold Accuracy: ±1.5% of Monitored Voltage Over Temperature
  • Adjustable Pushbutton On/Off Timers
  • Simple Interface Allows Graceful μP Shutdown
  • Extendable Housekeeping Wait Time Prior to Shutdown
  • 200ms Reset Delay and 1.6s Watchdog Timeout
  • ±8kV HBM ESD on PB Input
  • 20-pin TSSOP and QFN (4mm × 4mm) Packages

Typical Application

LTC2952 Typical Application
LTC2952 Typical Application

Description

The LTC2952 is a power management device that features three main functions: pushbutton on/off control of system power, ideal diode PowerPath controllers and system monitoring. The LTC2952’s pushbutton input, which provides on/off control of system power, has independently adjustable ON and OFF debounce times. A simple microprocessor interface involving an interrupt signal allows for proper system housekeeping prior to power-down.

The ideal diode PowerPath controllers provide automatic low loss switchover between two DC sources by regulating two external P-channel MOSFETs to have a small 20mV forward drop.

High reliability systems may utilize the LTC2952’s monitoring features to ensure system integrity. These features include: power-fail, voltage monitoring and μP watchdog.

The LTC2952 operates over a wide operating voltage range to accommodate a large variety of input power supplies. The part’s combination of low 20mV external MOSFET regulation and very low standby current matches battery powered and power conscious application requirements.

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
LTC2952CF#PBF TSSOP-20 F C 05-08-1650 (F20) Yes
LTC2952CF#TRPBF TSSOP-20 F C 05-08-1650 (F20) Yes
LTC2952CUF#PBF 4x4 QFN-20 UF C 05-08-1710 Yes
LTC2952CUF#TRPBF 4x4 QFN-20 UF C 05-08-1710 Yes
LTC2952IF#PBF TSSOP-20 F I 05-08-1650 (F20) Yes
LTC2952IF#TRPBF TSSOP-20 F I 05-08-1650 (F20) Yes
LTC2952IUF#PBF 4x4 QFN-20 UF I 05-08-1710 Yes
LTC2952IUF#TRPBF 4x4 QFN-20 UF I 05-08-1710 Yes


LTC2952 Package Drawing
LTC2952 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
LTC2952CF#PBF TSSOP-20 C $4.21 $2.95 Yes
LTC2952CF#TRPBF TSSOP-20 C $3.01 Yes
LTC2952CUF#PBF 4x4 QFN-20 C $4.21 $2.95 Yes
LTC2952CUF#TRPBF 4x4 QFN-20 C $3.01 Yes
LTC2952IF#PBF TSSOP-20 I $5.05 $3.54 Yes
LTC2952IF#TRPBF TSSOP-20 I $3.60 Yes
LTC2952IUF#PBF 4x4 QFN-20 I $5.05 $3.54 Yes
LTC2952IUF#TRPBF 4x4 QFN-20 I $3.60 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
DC1033B LTC2952 Demo Board | Push-Button Power Path Controller w/ Supervisor $25.00
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Click here to view our complete list of demo boards

Applications

  • Desktop and Notebook Computers
  • Portable Instrumentations
  • Cell Phones, PDA and Handheld Computers
  • Servers and Computer Peripherals
  • Battery Backup 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:
LTC2952

Technical Support