LTC1470 - Single and Dual PCMCIA Protected 3.3V/5V VCC Switches

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 SafeSlotTM 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.

  • 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
LTC1470 Typical Application
LTC1470 Typical Application
  • Notebook Computers
  • Palmtop Computers
  • Pen-Based Computers
  • Handi-Terminals
  • PC Card Reader/Writers
  • 3.3V/5V Power Supply Switch
LTC1470 Package Drawing
LTC1470 Package Drawing
Order Information 订购型号
器件型号封装温度价格 (以 1 ~ 99 片为批量)价格 (以 1000 片为批量) *
CAD 符号
LTC1470/LTC1471 - Single and Dual PCMCIA Protected 3.3V/5V VCC Switches
LTC1470 Package Drawing LTC1470
AN60 - PCMCIA Card and Card Socket Power Management:
R319 Reliability Data
LTC1470 Footprints and Symbols