July 2014

Altera Corporation

© 2014 Altera Corporation. All rights reserved. ALTERA, ARRIA, CYCLONE, ENPIRION, HARDCOPY, MAX, MEGACORE,

NIOS, QUARTUS and STRATIX words and logos are trademarks of Altera Corporation and registered in the U.S. Patent and

Trademark Office and in other countries. All other words and logos identified as trademarks or service marks are the property of

their respective holders as described at www.altera.com/common/legal.html. Altera warrants performance of its semiconductor

products to current specifications in accordance with Altera's standard warranty, but reserves the right to make changes to any

products and services at any time without notice. Altera assumes no responsibility or liability arising out of the application or use

of any information, product, or service described herein except as expressly agreed to in writing by Altera. Altera customers are

advised to obtain the latest version of device specifications before relying on any published information and before placing orders

for products or services.

101 Innovation Drive

San Jose, CA 95134

www.altera.com

Subscribe

ISO

9001:2008

Registered

ES1021QI

Datasheet

The Altera Enpirion ES1021QI is an integrated 4-channel

controlled-on/controlled-off power-supply sequencer

with supply monitoring, fault protection and a “sequence

completed” signal (RESET). ES1021QI uses a patented,

micropower 7x charge pump to drive four external low-

cost NFET switch gates above the supply rail by 5.3V.

These ICs can be biased from 5V down to 1.5V by any

supply.

ES1021QI has two groups of two channels, each with its

independent I/O. It is ideal for voltage sequencing into

redundant capability loads. All four inputs must be

satisfied before turn-on, but a single group fault is

ignored by the other group.

External resistors provide flexible voltage threshold

programming of monitored rail voltages. Delay and

sequencing are provided by external capacitors for

ramp-up and ramp-down.

Additional I/O is provided for indicating and driving

the RESET state in various configurations.

For volume applications, other programmable options

and features are available.

Features

• Enables Arbitrary Turn-on and Turn-off Sequencing of

Up to Four Power Supplies (0.7V to 5V)

• Operates From 1.5V to 5V Supply Voltage

• Adjustable Voltage Slew Rate for Each Rail

• Multiple Sequencers Can be Daisy-Chained to Sequence

an Infinite Number of Independent Supplies

• Glitch Immunity

• Undervoltage Lockout for Each Supply

• Active Low ENABLE Input

• Dual Channel Groupings

• QFN Package

• Pb-free (RoHS-compliant)

Applications

•Graphics Cards

• FPGA/ASIC/Microprocessor/PowerPC Supply

Sequencing

•Network Routers

• Telecommunications Systems

FIGURE 1. TYPICAL ES1021QI APPLICATION

V1OUT

V2OUT

V3OUT

V4OUT

UVLO_B

UVLO_A

UVLO_D

UVLO_C

V1

V2

V3

V4

ENABLE_1

ENABLE_2

GROUND

RESET

RESET_2

FIGURE 2. ES1021QI GROUP INDEPENDENT TURN-OFF AND DELAY

ADJUSTABLE PRE-PROGRAMMED TURN-ON

B_VOUT

C_VOUT

D_VOUT

A_VOUT

EN_2 5V/DIV

EN_1 5V/DIV

ES1021QI Power Sequencing Controller

10128

July 9, 2014

Rev A