Datasheet

TPS2363

SLUS680B –JANUARY 2006–REVISED JANUARY 2010

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TERMINAL FUNCTIONS (continued)

TERMINAL

NAME I/O DESCRIPTION

NO.

TPS2363 MIC2592B

3.3-V channel output, used to monitor the SlotA/B voltage for power good.

When the main power is turned off, there is a 1.2-kΩ pull-down,

OUT33A/B 3VOUTA/B 16/21 I/O

bleed-down circuit, when all the voltages are below 100 mV slot power off

can be read from the SMBus.

GND GND 17, 46, 33 Ground

AUXHIA/B are used to select high AUX current, 800 mA. These pins are

pulled up to AUXINA/B with a 10-kΩ maximum resistor for 800 mA

AUXHIA/B N/C 18, 19 I selection. It has an internal 40-kΩ pull-down resistor so it may be NC or

connected to ground for the default 400 mA VAUXA/B. The AUX high

current feature is only on the TPS2363.

A 110-kΩ resistor from this pin to ground improves fault timer accuracy.

RFILTER A&B RFILTER [A&B] 20 I

See fault timer section for more information.

INT is an open drain output, active low when a fault occurs. The SMBus

interrupt mask disables the output. INT is cleared through reset of the

INT /INT 37 O status registers. This is described in the SMBus programming section.

This pin should be pulled up 3.3-V or AUXINA/B through an external

10-kΩ resistor at the end of the bus.

SMBus address selection inputs. These inputs are internally pulled up to

3.3-V or AUXINA/B with a 40-kΩ resistor; leave the pins open to program

A0, A1, A2 A0, A1, A2 41/40/39 I

a logic one or connect to ground for a zero. The controller reads the

address bits at initialization only.

This active high signal turns on the VAUX slot voltage. Taking this signal

AUXENA/B AUXENA/B 45/42 I low clears a fault on the slot caused by the VAUX voltages. Connect these

pins to ground when using the SMBus interface for control.

This active high signal turned on the main slot voltages. Taking this signal

ONA/B ONA/B 44/43 I low clears a fault on the slot caused by the main voltages. Connect these

pins to ground when using the SMBus interface for control.

SMBus clock input. This pin should be pulled up 3.3 V or AUXIN through

SCL SCL 47 I

an external 10-kΩ resistor at the end of the bus.

SMBus data in/output and address input. This pin should be pulled up

SDA SDA 48 I/O

3.3-V or AUXIN through an external 10-kΩ resistor at the end of the bus.

Product Folder Link(s): TPS2363