LTC1473L - Dual Low Voltage PowerPath Switch Driver
Features
- Power Path Management for Systems with Multiple DC Sources
- Switches and Isolates Sources from 3.3V to 10V
- All N-Channel Switching to Reduce Power Losses and System Cost
- Built-In Step-Up Regulator for N-Channel Gate Drive
- Capacitor Inrush and Short-Circuit Current Limited
- User-Programmable Timer Prevents Overdissipation During Current Limiting
- Undervoltage Lockout Prevents Operation with Low Inputs
- Small Footprint: 16-Pin Narrow SSOP
Typical Application
Description
The LTC1473L provides reliable and efficient switching between two DC power sources. This device drives two external sets of back-to-back N-channel MOSFET switches to route power to the input of a low voltage system. An internal boost regulator provides the voltage to fully enhance the logic-level N-channel MOSFET switches while an internal under voltage lock-out circuit keeps the system alive down to 2.8V. The LTC1473L senses current to limit inrush between the batteries and the system supply capacitor during switch-over transitions or during fault conditions. A user-programmable timer monitors the time the MOSFET switches are in current limit and latches them off when the programmed time is exceeded. A unique “2-diode” logic mode ensures system start-up regardless of which input receives power first.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 |
|---|---|---|---|---|---|
| LTC1473LCGN#PBF | SSOP-16 | GN | C | 05-08-1641 (GN16) | Yes |
| LTC1473LCGN#TRPBF | SSOP-16 | GN | C | 05-08-1641 (GN16) | 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 | |
|---|---|---|---|---|---|---|
| LTC1473LCGN#PBF | SSOP-16 | C | $4.40 | $3.55 | Yes | |
| LTC1473LCGN#TRPBF | SSOP-16 | C | $3.61 | 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.Click here to view our complete list of demo boards
Applications
- Portable Computers
- Portable Instruments
- Fault Tolerant Computers
- Battery-Backup Systems
- 3.3V/5V Power Management
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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:
LTC1473L
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.
