LTC1314/LTC1315
PIN FUNCTIONS
LTC1315
VPP
IN
(Pins 1, 7):
12V Power Inputs.
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
voltage output on VPP
OUT
. The input thresholds are
compatible with TTL/CMOS levels. Refer to the Truth
Table.
V
CC0
(Pins 5, 11):
Logic inputs that control the state of the
MOSFET gate driver DRV3. ESD protection device limits
input excursions to 0.6V below ground.
V
CC1
(Pins 6, 12):
Logic inputs that control the state of the
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
that control the external MOSFETs that switch the V
CC
pin
of card slot to Hi-Z, 3.3V, or 5V.
V
DD
(Pins 15, 21):
Positive Supplies, 4.5V
鈮?/div>
V
DD
鈮?/div>
5.5V.
These pins supply the power to the control logic and the
charge pumps and must be continuously powered.
GND (Pins 16, 22):
Ground Connections.
VPP
OUT
(Pins 17, 23):
Switched outputs that provide 0V,
3.3V, 5V, 12V, or Hi-Z to the VPP pin of the card slot. Refer
to the Truth Table.
V
CCIN
(Pins 18, 24):
5V or 3.3V Power Inputs.
BLOCK DIAGRAM
EN0
TTL TO CMOS
CONVERTER
BREAK-BEFORE-
MAKE SWITCHES
OSCILLATOR
AND BIAS
V
CCIN
GATE CHARGE
AND DISCHARGE
CONTROL LOGIC
CHARGE
PUMP
EN1
TTL TO CMOS
CONVERTER
VPP
IN
+
GATE CHARGE
CONTROL LOGIC
10V
VPP
OUT
鈥?/div>
W
U
U
U
LTC1314 or 1/2 LTC1315
SHDN
VPP
IN
GATE CHARGE
AND DISCHARGE
CONTROL LOGIC
CHARGE
PUMP
GND
V
CC0
TTL TO CMOS
CONVERTER
DRV3
GATE CHARGE
AND DISCHARGE
CONTROL LOGIC
DRV5
V
CC1
TTL TO CMOS
CONVERTER
OSCILLATOR AND
CHARGE PUMP
OUTPUT
SWITCHES
LTC1314 鈥?BD
5
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