ES1030QI datasheet(9/14 Pages) ALTERA

Il numero della parte	ES1030QI

Spiegazioni elettronici	Power Rail Sequencer

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Produttore elettronici	ALTERA [Altera Corporation]

Homepage	http://www.altera.com

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9 / 14 page

ES1030QI

of all devices connected to this part has completed.

Voltage Levels and Power-On Reset (POR)

The internal circuitry of the ES1030QI is functional

over the VDD voltage range from 1.71 V to 5.5 V,

allowing operation from standard logic voltages from

1.8 V to 5 V.

There is an internal initialization time of up to 2.5 ms

while the device is preparing for operation. All I/O

signals on the ES1030QI are in a high-impedance

state during the hardware initialization time. The POR

output indicates by transition to HIGH that the

sequencer initialization is complete.

The sequencer accepts EN inputs before, during, or

after internal initialization, and the outputs begin

sequencing in the correct order after the initialization

is complete. To avoid additional delay on the first OE,

the sequencer should be powered up at least 2.5 ms

before the first transition on EN.

The PGx signal inputs provide internal pull-ups

(~100k ohms) to VDD. External pull ups on the PG

signals from the regulator should only be needed if

there is significant capacitive loading or leakage

current on the PG signals. Logic levels are dependent

on the VDD for the ES1030QI as shown in the

Electrical Characteristics table. The nFAULT_IN and

NEXT_IN signals should have external pull ups to

VDD. Transitions on the PGx, nFAULT_IN, and

NEXT_IN signals are ignored during the initialization

period.

The OEx and ALL_PG output drive signals are push-

pull active drivers after initialization. Therefore, the

output logic drive level is the same as the VDD supply

to the ES1030QI.

Functionality Waveforms

WAVEFORM DEFINITIONS FOR FIGURES 5 TO 9

WAVE

D0

Pin 20 (EN)

D1

Pin 15 (OE1)

D2

Pin 14 (OE2)

D3

Pin 5 (OE3)

D4

Pin 4 (OE4)

D5

Pin 12 (PG1)

D6

Pin 13 (PG2)

D7

Pin 6 (PG3)

D8

Pin 7 (PG4)

D9

Pin 17 (ALL_PG)

D10

Pin 3 (nFAULT_O)

Channel 1 (yellow)

Pin 8 (ACNTL)

9

www.altera.com/enpirion

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