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
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 |
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 | ||
| Buy Now • Request Samples | ||||||
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 | |
| Buy Now | |||
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
- For immediate technical assistance, contact your local sales office or distributor or call 1-800-4-LINEAR (US customers only) or 408-432-1900.
- For less urgent requests, please complete our Technical Support Request Form. Please allow 2-3 business days for reply.
