LTC1471 - Single and Dual PCMCIA Protected 3.3V/5V VCC Switches
Features
- Single 3.3V/5V Switch in 8-Pin SO Package
- Dual 3.3V/5V Switch in 16-Pin SO Package
- Built-In Current Limit and Thermal Shutdown
- Built-In Charge Pumps (No 12V Required)
- Extremely Low RDS(ON) MOSFET Switches
- Output Current Capability: 1A
- Inrush Current Limited (Drives 150µF Loads)
- Quiescent Current in Standby: 1µA
- No Parasitic Body Diodes
- Built-In XOR Function Eliminates “Glue” Logic
- Break-Before-Make Switching
- Controlled Rise and Fall Times
Typical Application
Description
The LTC®1470 switches the VCC pins of a Personal Computer Memory Card International Association (PCMCIA) card slot between three operating states: OFF, 3.3V and 5V. Two low RDS(ON) N-channel power MOSFETs are driven by a built-in charge pump which generates a voltage higher than the supply voltage to fully enhance each switch when selected by the input control logic.
The LTC1470 inputs are compatible with industry standard PCMCIA controllers. A built-in XOR ensures that both switches are never on at the same time. This function also makes the LTC1470 compatible with both active-low and active-high controllers (see Applications Information section). The switch rise times are controlled to eliminate power supply glitching.
The LTC1470 features built-in SafeSlot™ current limit and thermal shutdown. The output is limited to 1A during short circuit to ground but 2A of peak operating current is allowed.
The LTC1471 is a dual version of the LTC1470 and is available in a 16-pin SO package.
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 |
|---|---|---|---|---|---|
| LTC1471CS#PBF | SO-16 | S | C | 05-08-1610 (S16) | Yes |
| LTC1471CS#TRPBF | SO-16 | S | C | 05-08-1610 (S16) | 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 | |
|---|---|---|---|---|---|---|
| LTC1471CS#PBF | SO-16 | C | $5.00 | $4.10 | Yes | |
| LTC1471CS#TRPBF | SO-16 | C | $4.16 | 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
- Notebook Computers
- Palmtop Computers
- Pen-Based Computers
- Handi-Terminals
- PC Card Reader/Writers
- 3.3V/5V Power Supply Switch
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Design Tools
Linear Technology provides a variety of custom design simulation tools and device models to allow even novice designers to quickly and easily evaluate circuits using high performance switching regulators, amplifiers, data converters, filters and more. Please visit our Design Tools page to view and download:
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- And More!
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.
