adm1014 Analog Devices, Inc., adm1014 Datasheet - Page 6

• Manufacturer Part Number: adm1014
• Description: Dual Pci Hot-plugtm Controller
• Manufacturer: Analog Devices, Inc.

ADM1014
Pin
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
Mnemonic
M12VINB
3VISENB
3VSB
5VISENB
5VSB
3V5VGB
AUXINB
PAUXONB
12VINB
12VINA
PAUXONA
AUXINA
GND
3V5VGA
5VSA
5VISENA
3VSA
3VISENA
M12VINA
Function
-12V supply input for channel B. Also provides power to the -12V overcurrent circuitry.
3.3V current sense for channel B. A current-sensing resistor is connected between this pin and 3VSB
(pin 22). Connect to the load side of the current sense resistor.
3.3V source for channel B. The source of the 3.3V MOSFET is connected to this pin and a
current-sensing resistor is connected between this pin and pin 21.
5V current sense for channel B. A current-sensing resistor is connected between this pin and 5VSB
(pin 24). Connect to the load side of the current sense resistor.
5V source for channel B. The source of the 5V MOSFET is connected to this pin and a
current-sensing resistor is connected between this pin and pin 23.
3.3V and 5V gate output for channel B, drives the gates of the external 3.3V and 5V MOSFETs.
A capacitor connected from this pin to GND sets the start-up ramp for the 3.3V and 5V supplies.
During turn-on, this capacitor is charged from a 25µA current source. The undervoltage circuitry is
disabled when the voltage on 3V5VGB falls below 12VIN-1.2V.
+3.3V auxiliary supply input for channel B.
Power on control for channel B +3.3V auxiliary output. 3.3V CMOS-compatible logic input.
PAUXONB high = outputs on, PAUXONB low = outputs off.
Switched +12V supply input for channel B.
Switched +12V supply input for channel A and for OCSET and power-on RESET circuits.
Power on control for channel A +3.3V auxiliary output. 3.3V CMOS-compatible logic input.
PAUXONA high = outputs on, PAUXONA low = outputs off.
+3.3V auxiliary supply input for channel A.
Ground for all chip circuits. Connect to common of power supplies.
3.3V and 5V gate output for channel A, drives the gates of the external 3.3V and 5V MOSFETs. A
capacitor connected from this pin to GND sets the start-up ramp for the 3.3V and 5V supplies.
During turn-on, this capacitor is charged from a 25µA current source. The undervoltage circuitry is
disabled when the voltage on 3V5VGA falls below 12VIN-1.2V.
5V source for channel A. The source of the 5V MOSFET is connected to this pin and a
current-sensing resistor is connected between this pin and pin 35.
5V current sense for channel A. A current-sensing resistor is connected between this pin and 5VSA
(pin 34). Connect to the load side of the current sense resistor.
3.3V source for channel A. The source of the 3.3V MOSFET is connected to this pin and a
current-sensing resistor is connected between this pin and pin 37.
3.3V current sense for channel A. A current-sensing resistor is connected between this pin and 3VSA
(pin 36). Connect to the load side of the current sense resistor.
-12V supply input for channel A. Also provides power to the -12V overcurrent circuitry.
PIN FUNCTION DESCRIPTION (CONTINUED)
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REV. PrN 1/02