DocumentationDatasheet
Application Note
Reliability Data
cad_symbol
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.
SO-8
Package Variations and Pricing
| Part Number | Package | Pins | Temp | Price (1-99) |
Price (1k)* |
|---|---|---|---|---|---|
| LTC1470CS8#PBF | SO | 8 | C | $3.00 | $2.45 |
| LTC1470CS8#TRPBF | SO | 8 | C | $2.51 | |
| LTC1470ES8#PBF | SO | 8 | E | $3.84 | $2.70 |
| LTC1470ES8#TRPBF | SO | 8 | E | $2.76 | |
| LTC1470CS8 | SO | 8 | C | $6.00 | $4.90 |
| LTC1470CS8#TR | SO | 8 | C | $5.02 | |
| LTC1470ES8 | SO | 8 | E | $7.68 | $5.40 |
| LTC1470ES8#TR | SO | 8 | E | $5.52 |
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.