5

LTC1314/LTC1315

LTC1315

SHDN (Pins 2, 8): Shutdown Outputs. When the output is

high, the external 12V regulator can be shut down to

conserve power consumption.

EN0, EN1 (Pins 3, 4, 9, 10): Logic inputs that control the

compatible with TTL/CMOS levels. Refer to the Truth

Table.

MOSFET gate driver DRV3. ESD protection device limits

input excursions to 0.6V below ground.

MOSFET gate driver DRV5. ESD protection device limits

input excursions to 0.6V below ground.

DRV5, DRV3 (Pins 13, 14, 19, 20): Gate driver outputs

of card slot to Hi-Z, 3.3V, or 5V.

These pins supply the power to the control logic and the

charge pumps and must be continuously powered.

GND (Pins 16, 22): Ground Connections.

3.3V, 5V, 12V, or Hi-Z to the VPP pin of the card slot. Refer

to the Truth Table.

GATE CHARGE

AND DISCHARGE

CONTROL LOGIC

OSCILLATOR

AND BIAS

CHARGE

PUMP

CHARGE

PUMP

BREAK-BEFORE-

MAKE SWITCHES

TTL TO CMOS

CONVERTER

TTL TO CMOS

CONVERTER

GATE CHARGE

AND DISCHARGE

CONTROL LOGIC

GATE CHARGE

CONTROL LOGIC

OSCILLATOR AND

CHARGE PUMP

OUTPUT

SWITCHES

TTL TO CMOS

CONVERTER

TTL TO CMOS

CONVERTER

–

+

SHDN

10V

EN1

EN0

GND

DRV3

DRV5

LTC1314 • BD

GATE CHARGE

AND DISCHARGE

CONTROL LOGIC

LTC1314 or 1/2 LTC1315