General Description

The MAX16025璏AX16030 are dual-/triple-/quad-volt-
age monitors and sequencers that are offered in a
small TQFN package. These devices offer enormous
design flexibility as they allow fixed and adjustable
thresholds to be selected through logic inputs and pro-
vide sequence timing through small external capaci-
tors. These versatile devices are ideal for use in a wide
variety of multivoltage applications.

As the voltage at each monitored input exceeds its
respective threshold, its corresponding output goes
high after a propagation delay or a capacitor-set time
delay. When a voltage falls below its threshold, its
respective output goes low after a propagation delay.
Each detector circuit also includes its own enable input,
allowing the power-good outputs to be shut off inde-
pendently. The independent output for each detector is
available with push-pull or open-drain configuration
with the open-drain version capable of supporting volt-
ages up to 28V, thereby allowing them to interface to
shutdown and enable inputs of various DC-DC regula-
tors. Each detector can operate independently as four
separate supervisory circuits or can be daisy-chained
to provide controlled power-supply sequencing.

The MAX16025璏AX16030 also include a reset func-
tion that deasserts only after all of the independently
monitored voltages exceed their threshold. The reset
timeout is internally fixed or can be adjusted externally.
These devices are offered in a 4mm x 4mm TQFN
package and are fully specified from -40癈 to +125癈.

Applications

Multivoltage Systems

DC-DC Supplies

Servers/Workstations

Storage Systems

Networking/Telecommunication Equipment

Features

o 2.2V to 28V Operating Voltage Range
o Fixed Thresholds for 3.3V, 2.5V, 1.8V, 1.5V, and

1.2V Systems

o 1.5% Accurate Adjustable Threshold Monitors

Voltages Down to 0.5V

o 2.7% Accurate Fixed Thresholds Over

Temperature

o Fixed (140ms min)/Capacitor-Adjustable Delay

Timing

o Independent Open-Drain/Push-Pull Outputs
o Enable Inputs for Each Monitored Voltage
o 9 Logic-Selectable Threshold Options
o Manual Reset and Tolerance Select (5%/10%) Inputs
o Small, 4mm x 4mm TQFN Package
o Fully Specified from -40癈 to +125癈

MAX16025璏AX16030

Dual-/Triple-/Quad-Voltage, Capacitor-

Adjustable, Sequencing/Supervisory Circuits

Maxim Integrated Products

TOP VIEW

IN1

IN3

IN4

TOL

OUT1

OUT3

OUT4

RESET

TH0

CDLY3

CDLY2

CDLY1

EN3

EN2

EN1

GND

MAX16029
MAX16030

IN2

OUT2

CDLY4

EN4

CRESET

TH1

THIN QFN

(4mm x 4mm)

Pin Configurations

Ordering Information

19-0525; Rev 1; 6/06

For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at
1-888-629-4642, or visit Maxim's website at www.maxim-ic.com.

Denotes lead-free package.

For tape and reel, add a "T" after the "+." All tape and reel

orders are available in 2.5k increments.

PART*

TEMP RANGE

PIN-
PACKAGE

PKG

CODE

MAX16025TE+

-40癈 to +125癈

16 TQFN

T1644-4

MAX16026TE+

-40癈 to +125癈

16 TQFN

T1644-4

MAX16027TP+

-40癈 to +125癈

20 TQFN

T2044-3

MAX16028TP+

-40癈 to +125癈

20 TQFN

T2044-3

MAX16029TG+

-40癈 to +125癈

24 TQFN

T2444-4

MAX16030TG+

-40癈 to +125癈

24 TQFN

T2444-4

Selector Guide

PART

MONITORED

VOLTAGES

INDEPENDENT

OUTPUTS

RESET

OUTPUT

MAX16025

2 (Open-drain)

Open-drain

MAX16026

2 (Push-pull)

Push-pull

MAX16027

3 (Open-drain)

Open-drain

MAX16028

3 (Push-pull)

Push-pull

MAX16029

4 (Open-drain)

Open-drain

MAX16030

4 (Push-pull)

Push-pull

Pin Configurations continued at end of data sheet.

MAX16025璏AX16030

Dual-/Triple-/Quad-Voltage, Capacitor-
Adjustable, Sequencing/Supervisory Circuits

E M

XIIM

M R

TIIN

ELECTRICAL CHARACTERISTICS

= 2.2V to 28V, T

= -40�C to +125�C, unless otherwise specified. Typical values are at V

= 3.3V and T

= +25�C.) (Note 1)

Stresses beyond those listed under "Absolute Maximum Ratings" may cause permanent damage to the device. These are stress ratings only, and functional
operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to
absolute maximum rating conditions for extended periods may affect device reliability.

(All voltages referenced to GND.)
V

.........................................................................-0.3V to +30V

EN1璄N4 ....................................................-0.3V to (V

+ 0.3V)

OUT1璒UT4 (push-pull).............................-0.3V to (V

+ 0.3V)

OUT1璒UT4 (open-drain) ......................................-0.3V to +30V
RESET (push-pull) ......................................-0.3V to (V

+ 0.3V)

RESET (open-drain) ..................................................-0.3V to 30V
IN1璉N4.......................................................-0.3V to (V

+ 0.3V)

MR, TOL, TH1, TH0 ....................................-0.3V to (V

+ 0.3V)

CDLY1瑿DLY4 .........................................................-0.3V to +6V

CRESET ......................................................-0.3V to (V

+ 0.3V)

Input/Output Current (all pins)..........................................�20mA
Continuous Power Dissipation (T

= +70癈)

16-Pin TQFN (derate 25mW/癈 above +70癈) ...........2000mW
20-Pin TQFN (derate 25.6mW/癈 above +70癈) ........2051mW
24-Pin TQFN (derate 27.8mW/癈 above +70癈) ........2222mW

Operating Temperature Range .........................-40癈 to +125癈
Storage Temperature Range .............................-65癈 to +150癈
Junction Temperature ......................................................+150癈
Lead Temperature (soldering, 10s) .................................+300癈

PARAMETER

SYMBOL

CONDITIONS

MIN

TYP

MAX

UNITS

SUPPLY

Operating Voltage Range

(Note 2)

2.2

28.0

Undervoltage Lockout

UVLO

(Note 2)

1.8

1.9

2.0

Undervoltage-Lockout Hysteresis

UVLO

HYST

falling

= 3.3V

= 12V

Supply Current

All OUT_ and RESET at
logic-high (IN_ current
excluded)

= 28V

礎

INPUTS (IN_)

3.3V threshold, TOL = GND

2.970

3.052

3.135

3.3V threshold, TOL = V

2.805

2.888

2.970

2.5V threshold, TOL = GND

2.250

2.313

2.375

2.5V threshold, TOL = V

2.125

2.187

2.250

1.8V threshold, TOL = GND

1.620

1.665

1.710

1.8V threshold, TOL = V

1.530

1.575

1.620

1.5V threshold, TOL = GND

1.350

1.387

1.425

1.5V threshold, TOL = V

1.275

1.312

1.350

1.2V threshold, TOL = GND

1.080

1.110

1.140

IN_ Thresholds (IN_ Falling)

1.2V threshold, TOL = V

1.020

1.050

1.080

TOL = GND

0.492

0.5

0.508

Adjustable Threshold (IN_
Falling)

TOL = V

0.463

0.472

0.481

IN_ Hysteresis (IN_ Rising)

HYST

0.5

IN_ Input Resistance

Fixed threshold

500

918

IN_ Input Current

Adjustable threshold only (V

IN_

= 1V)

-100

+100

MAX16025璏AX16030

Dual-/Triple-/Quad-Voltage, Capacitor-

Adjustable, Sequencing/Supervisory Circuits

ELECTRICAL CHARACTERISTICS (continued)

= 2.2V to 28V, T

= -40�C to +125�C, unless otherwise specified. Typical values are at V

= 3.3V and T

= +25�C.) (Note 1)

PARAMETER

SYMBOL

CONDITIONS

MIN

TYP

MAX

UNITS

CRESET AND CDLY_

CRESET Threshold

TH-RESET

CRESET rising, V

= 3.3V

0.465

0.5

0.535

CRESET Charge Current

CH-RESET

= 3.3V

380

500

620

CDLY_ Threshold

TH-CDLY

CDLY_ rising, V

= 3.3V

0.95

1.05

CDLY_ Charge Current

CH-CDLY

= 3.3V

200

250

300

DIGITAL LOGIC INPUTS (EN_,

MR, TOL, TH1, TH0)

Input Low Voltage

0.4

Input High Voltage

1.4

TH1, TH0 Logic-Input Floating

0.6

TOL, TH1, TH0 Logic-Input
Current

TOL

, V

TH1

, V

TH0

= GND or V

-1

礎

EN_ Input Leakage Current

EN_

= V

or GND

-100

+100

MR Internal Pullup Current

= 3.3V

250

535

820

OUTPUTS (OUT_,

RESET)

1.2V, I

SINK

= 90礎

0.3

2.25V, I

SINK

= 0.5mA

0.3

Output Low Voltage (Open-Drain
or Push-Pull)

4.5V, I

SINK

= 1mA

0.35

3V, I

SOURCE

= 500礎

0.8 x V

Output High Voltage (Push-Pull)

4.5V, I

SOURCE

= 800礎

0.8 x V

Output Leakage Current (Open-
Drain)

LKG

Output not asserted low, V

OUT

= 28V

礎

CRESET = V

, V

= 3.3V

140

190

260

Reset Timeout Period

CRESET open

0.030

TIMING

DELAY+

IN_ rising, CDLY_ open

IN_ to OUT_ Propagation Delay

DELAY-

IN_ falling, CDLY_ open

祍

IN_ to RESET Propagation Delay

RST-DELAY

CRESET open, IN_ falling

祍

MR Minimum Input Pulse Width

(Note 3)

祍

EN_ or MR Glitch Rejection

280

OFF

From device enabled to device disabled

EN_ to OUT_ Delay

From device disabled to device enabled
(CDLY_ open)

祍

MR to RESET Delay

MR falling

祍

Note 1: Devices are production tested at T

= +25癈. Limits over temperature are guaranteed by design.

Note 2: Operating below the UVLO causes all outputs to go low. The outputs are guaranteed to be in the correct state for V

down

to 1.2V.

Note 3: In order to guarantee an assertion, the minimum input pulse width must be greater than 2祍.

MAX16025璏AX16030

Dual-/Triple-/Quad-Voltage, Capacitor-
Adjustable, Sequencing/Supervisory Circuits

Typical Operating Characteristics

= 3.3V, T

= +25癈, unless otherwise noted.)

SUPPLY CURRENT

vs. SUPPLY VOLTAGE

MAX16025 toc01

SUPPLY VOLTAGE (V)

SUPPLY CURRENT (

�

MAX16026

SUPPLY CURRENT

vs. TEMPERATURE

MAX16025 toc02

TEMPERATURE (

癈)

SUPPLY CURRENT (

�

110

-10

-25

-40

125

MAX16026

= 28V

= 12V

= 3.3V

NORMALIZED ADJUSTABLE THRESHOLD

vs. TEMPERATURE

MAX16025 toc03

TEMPERATURE (

癈)

NORMALIZED THRESHOLD

110

65 80

-10 5

20 35 50

-25

0.991

0.992

0.993

0.994

0.995

0.996

0.997

0.998

0.999

1.000

1.001

1.002

1.003

0.990

-40

125

TOL = V

TOL = GND

ADJUSTABLE THRESHOLD

NORMALIZED ADJUSTABLE THRESHOLD

vs. TEMPERATURE

MAX16025 toc04

TEMPERATURE (

癈)

NORMALIZED THRESHOLD

110

65 80

-10 5

20 35 50

-25

0.991

0.992

0.993

0.994

0.995

0.996

0.997

0.998

0.999

1.000

1.001

1.002

1.003

0.990

-40

125

TOL = V

TOL = GND

3.3V THRESHOLD

OUT_ DELAY vs. C

CDLY_

MAX16025 toc05

CDLY_

(nF)

OUT_ DELAY (ms)

900

800

600 700

200 300 400 500

100

500

1000

1500

2000

2500

3000

3500

4000

4500

5000

1000

RESET TIMEOUT PERIOD

vs. C

CRESET

MAX16025 toc06

CRESET

(nF)

RESET TIMEOUT PERIOD (ms)

900

800

600 700

200 300 400 500

100

200

300

400

500

600

700

800

900

1000

1100

1200

1000

FIXED RESET TIMEOUT PERIOD

vs. TEMPERATURE

MAX16025 toc07

TEMPERATURE (

癈)

FIXED RESET TIMEOUT PERIOD (ms)

110

65 80

-10 5

20 35 50

-25

181

182

183

184

185

186

187

188

189

190

180

-40

125

CRESET = V

OUT_ LOW VOLTAGE

vs. SINK CURRENT

MAX16025 toc08

SINK CURRENT (mA)

OUT_

(V)

0.2

0.4

0.6

0.8

1.0

OUT_ HIGH VOLTAGE

vs. SOURCE CURRENT

MAX16025 toc09

SOURCE CURRENT (mA)

OUT_

(V)

0.9

0.8

0.7

0.6

0.5

0.4

0.3

0.2

0.1

0.5

1.0

1.5

2.0

2.5

3.0

3.5

1.0

PUSH-PULL VERSIONS

MAX16025璏AX16030

Dual-/Triple-/Quad-Voltage, Capacitor-

Adjustable, Sequencing/Supervisory Circuits

_______________________________________________________________________________________

RESET OUTPUT LOW VOLTAGE

vs. SINK CURRENT

MAX16025 toc10

SINK CURRENT (mA)

RESET OUTPUT LOW VOLTAGE (V)

0.1

0.2

0.3

0.4

0.5

0.6

0.7

0.8

0.9

1.0

RESET OUTPUT HIGH VOLTAGE

vs. SOURCE CURRENT

MAX16025 toc11

SOURCE CURRENT (mA)

RESET OUTPUT HIGH VOLTAGE (V)

0.9

0.8

0.7

0.6

0.5

0.4

0.3

0.2

0.1

0.5

1.0

1.5

2.0

2.5

3.0

3.5

1.0

PUSH-PULL VERSIONS

ENABLE TURN-OFF

MAX16025 toc12

祍/div

EN_

OUT_

RESET

CRESET = V

CDLY_ = OPEN

ENABLE TURN-ON

MAX16025 toc13

40ms/div

EN_

OUT_

RESET

CRESET = V

CDLY_ = OPEN

RESET TIMEOUT DELAY

MAX16025 toc14

100ms/div

IN_

OUT_

RESET

CRESET = V

CDLY_ = OPEN

MR FALLING vs. RESET

MAX16025 toc15

祍/div

RESET

CRESET = V

CDLY_ = OPEN

MR RISING vs. RESET

MAX16025 toc16

40ms/div

RESET

CRESET = V

CDLY_ = OPEN

MAXIMUM TRANSIENT DURATION

vs. THRESHOLD OVERDRIVE

MAX16025 toc17

THRESHOLD OVERDRIVE (mV)

MAXIMUM TRANSIENT DURATION (

�

100

1000

OUTPUT ASSERTED ABOVE THIS LINE

Typical Operating Characteristics (continued)

= 3.3V, T

= +25癈, unless otherwise noted.)

协谢械泻褌褉芯薪薪褘泄 泻芯屑锌芯薪械薪褌: MAX16029

协谢械泻褌褉芯薪薪褘泄泻芯屑锌芯薪械薪褌: MAX16029