General Description
The MAX16041/MAX16042/MAX16043 are dual-/triple-/
quad-voltage monitors and sequencers that are offered
in a small thin QFN package. These devices offer enor-
mous design flexibility as they allow fixed and
adjustable thresholds to be selected through logic
inputs and provide sequence timing through small
external capacitors. 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
has an open-drain configuration capable of supporting
voltages up to 28V, thereby allowing them to interface
to shutdown and enable inputs of various DC-DC regu-
lators. Each detector can operate independently as four
separate supervisory circuits or can be daisy-chained
to provide controlled power-supply sequencing.
The MAX16041/MAX16042/MAX16043 also include a
push-pull reset function 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°C to +125°C.
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 Outputs/Push-Pull
RESET Output
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°C to +125°C
MAX16041/MAX16042/MAX16043
Dual-/Triple-/Quad-Voltage, Capacitor-
Adjustable, Sequencing/Supervisory Circuits
________________________________________________________________
Maxim Integrated Products
1
TOP VIEW
+
23
24
22
21
8
7
9
IN1
IN3
IN4
TOL
10
V
CC
OUT1
OUT3
OUT4
RESET
TH0
1
2
CDLY3
4
5
6
17
18
16
14
13
CDLY2
CDLY1
EN3
EN2
EN1
GND
MAX16043
IN2
OUT2
3
15
CDLY4
20
11
EN4
CRESET
19
12
TH1
MR
TQFN
(4mm x 4mm)
Pin Configurations
Ordering Information
19-0622; Rev 0; 8/06
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
MAX16041TE+
-40°C to +125°C
16 TQFN
T1644-4
MAX16042TP+
-40°C to +125°C
20 TQFN
T2044-3
MAX16043TG+
-40°C to +125°C
24 TQFN
T2444-4
Selector Guide
PART
MONITORED
VOLTAGES
INDEPENDENT
OUTPUTS
RESET
OUTPUT
MAX16041
2
2 (Open-drain)
Push-pull
MAX16042
3
3 (Open-drain)
Push-pull
MAX16043
4
4 (Open-drain)
Push-pull
Pin Configurations continued at end of data sheet.
MAX16041/MAX16042/MAX16043
Dual-/Triple-/Quad-Voltage, Capacitor-
Adjustable, Sequencing/Supervisory Circuits
2
_______________________________________________________________________________________
ABSOLUTE MAXIMUM RATINGS
ELECTRICAL CHARACTERISTICS
(V
CC
= 2.2V to 28V, T
A
= -40°C to +125°C, unless otherwise specified. Typical values are at V
CC
= 3.3V and T
A
= +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
CC
.........................................................................-0.3V to +30V
EN1EN4 ....................................................-0.3V to (V
CC
+ 0.3V)
OUT1OUT4 ...........................................................-0.3V to +30V
RESET.........................................................-0.3V to (V
CC
+ 0.3V)
IN1IN4.......................................................-0.3V to (V
CC
+ 0.3V)
MR, TOL, TH1, TH0 ....................................-0.3V to (V
CC
+ 0.3V)
CDLY1CDLY4 .........................................................-0.3V to +6V
CRESET ......................................................-0.3V to (V
CC
+ 0.3V)
Input/Output Current (all pins)..........................................±20mA
Continuous Power Dissipation (T
A
= +70°C)
16-Pin TQFN (derate 25mW/°C above +70°C) ...........2000mW
20-Pin TQFN (derate 25.6mW/°C above +70°C) ........2051mW
24-Pin TQFN (derate 27.8mW/°C above +70°C) ........2222mW
Operating Temperature Range .........................-40°C to +125°C
Storage Temperature Range .............................-65°C to +150°C
Junction Temperature ......................................................+150°C
Lead Temperature (soldering, 10s) .................................+300°C
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
SUPPLY
Operating Voltage Range
V
CC
(Note 2)
2.2
28.0
V
Undervoltage Lockout
UVLO
(Note 2)
1.8
1.9
2.0
V
Undervoltage-Lockout Hysteresis
UVLO
HYST
V
CC
falling
50
mV
V
CC
= 3.3V
40
75
V
CC
= 12V
47
75
V
CC
Supply Current
I
CC
All OUT_ and
RESET at
logic-high (IN_ current
excluded)
V
CC
= 28V
52
80
µA
INPUTS (IN_)
3.3V threshold, TOL = GND
2.970
3.052
3.135
3.3V threshold, TOL = V
CC
2.805
2.888
2.970
2.5V threshold, TOL = GND
2.250
2.313
2.375
2.5V threshold, TOL = V
CC
2.125
2.187
2.250
1.8V threshold, TOL = GND
1.620
1.665
1.710
1.8V threshold, TOL = V
CC
1.530
1.575
1.620
1.5V threshold, TOL = GND
1.350
1.387
1.425
1.5V threshold, TOL = V
CC
1.275
1.312
1.350
1.2V threshold, TOL = GND
1.080
1.110
1.140
IN_ Thresholds (IN_ Falling)
V
TH
1.2V threshold, TOL = V
CC
1.020
1.050
1.080
V
TOL = GND
0.492
0.5
0.508
Adjustable Threshold
(IN_ Falling)
V
TH
TOL = V
CC
0.463
0.472
0.481
V
IN_ Hysteresis (IN_ Rising)
V
HYST
0.5
%
IN_ Input Resistance
Fixed threshold
500
918
k
IN_ Input Current
I
L
Adjustable threshold only (V
IN_
= 1V)
-100
+100
nA
MAX16041/MAX16042/MAX16043
Dual-/Triple-/Quad-Voltage, Capacitor-
Adjustable, Sequencing/Supervisory Circuits
_______________________________________________________________________________________
3
ELECTRICAL CHARACTERISTICS (continued)
(V
CC
= 2.2V to 28V, T
A
= -40°C to +125°C, unless otherwise specified. Typical values are at V
CC
= 3.3V and T
A
= +25°C.) (Note 1)
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
CRESET AND CDLY_
CRESET Threshold
V
TH-RESET
CRESET rising, V
CC
= 3.3V
0.465
0.5
0.535
V
CRESET Charge Current
I
CH-RESET
V
CC
= 3.3V
380
500
620
nA
CDLY_ Threshold
V
TH-CDLY
CDLY_ rising, V
CC
= 3.3V
0.95
1
1.05
V
CDLY_ Charge Current
I
CH-CDLY
V
CC
= 3.3V
200
250
300
nA
DIGITAL LOGIC INPUTS (EN_, MR, TOL, TH1, TH0)
Input Low Voltage
V
IL
0.4
V
Input High Voltage
V
IH
1.4
V
TH1, TH0 Logic-Input Floating
0.6
V
TOL, TH1, TH0 Logic-Input
Current
V
TOL
, V
TH1
, V
TH0
= GND or V
CC
-1
+1
µA
EN_ Input Leakage Current
V
EN_
= V
CC
or GND
-100
+100
nA
MR Internal Pullup Current
V
CC
= 3.3V
250
535
820
nA
OUTPUTS (OUT_, RESET)
V
CC
1.2V, I
SINK
= 90µA
0.3
V
CC
2.25V, I
SINK
= 0.5mA
0.3
Output Low Voltage
(Open-Drain or Push-Pull)
V
OL
V
CC
4.5V, I
SINK
= 1mA
0.35
V
V
CC
3V, I
SOURCE
= 500µA
0.8 x V
CC
Output High Voltage (Push-Pull)
V
OH
V
CC
4.5V, I
SOURCE
= 800µA
0.8 x V
CC
V
Output Leakage Current
(Open-Drain)
I
LKG
Output not asserted low, V
OUT
= 28V
1
µA
CRESET = V
CC
, V
CC
= 3.3V
140
190
260
Reset Timeout Period
t
RP
CRESET open
0.030
ms
TIMING
t
DELAY+
IN_ rising, CDLY_ open
35
IN_ to OUT_ Propagation Delay
t
DELAY-
IN_ falling, CDLY_ open
20
µs
IN_ to
RESET Propagation Delay
t
RST-DELAY
CRESET open, IN_ falling
35
µs
MR Minimum Input Pulse Width
(Note 3)
2
µs
EN_ or
MR Glitch Rejection
280
ns
t
OFF
From device enabled to device disabled
3
EN_ to OUT_ Delay
t
ON
From device disabled to device enabled
(CDLY_ open)
30
µs
MR to RESET Delay
MR falling
3
µs
Note 1: Devices are production tested at T
A
= +25°C. 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
CC
down
to 1.2V.
Note 3: To guarantee an assertion, the minimum input pulse width must be greater than 2µs.
MAX16041/MAX16042/MAX16043
Dual-/Triple-/Quad-Voltage, Capacitor-
Adjustable, Sequencing/Supervisory Circuits
4
_______________________________________________________________________________________
Typical Operating Characteristics
(V
CC
= 3.3V, T
A
= +25°C, unless otherwise noted.)
SUPPLY CURRENT
vs. SUPPLY VOLTAGE
MAX16041 toc01
SUPPLY VOLTAGE (V)
SUPPLY CURRENT (
µ
A)
26
22
18
14
10
6
35
40
45
50
55
60
30
2
30
MAX16041
SUPPLY CURRENT
vs. TEMPERATURE
MAX16041 toc02
TEMPERATURE (
°C)
SUPPLY CURRENT (
µ
A)
110
95
80
65
50
35
20
5
-10
-25
35
40
45
50
55
60
30
-40
125
MAX16041
V
CC
= 28V
V
CC
= 12V
V
CC
= 3.3V
NORMALIZED ADJUSTABLE THRESHOLD
vs. TEMPERATURE
MAX16041 toc03
TEMPERATURE (
°C)
NORMALIZED THRESHOLD
110
95
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
CC
TOL = GND
ADJUSTABLE THRESHOLD
NORMALIZED ADJUSTABLE THRESHOLD
vs. TEMPERATURE
MAX16041 toc04
TEMPERATURE (
°C)
NORMALIZED THRESHOLD
110
95
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
CC
TOL = GND
3.3V THRESHOLD
OUT_ DELAY vs. C
CDLY_
MAX16041 toc05
C
CDLY_
(nF)
OUT_ DELAY (ms)
900
800
600 700
200 300 400 500
100
500
1000
1500
2000
2500
3000
3500
4000
4500
5000
0
0
1000
RESET TIMEOUT PERIOD
vs. C
CRESET
MAX16041 toc06
C
CRESET
(nF)
RESET TIMEOUT PERIOD (ms)
900
800
600 700
200 300 400 500
100
100
200
300
400
500
600
700
800
900
1000
1100
1200
0
0
1000
FIXED RESET TIMEOUT PERIOD
vs. TEMPERATURE
MAX16041 toc07
TEMPERATURE (
°C)
FIXED RESET TIMEOUT PERIOD (ms)
110
95
65 80
-10 5
20 35 50
-25
181
182
183
184
185
186
187
188
189
190
180
-40
125
CRESET = V
CC
OUT_ LOW VOLTAGE
vs. SINK CURRENT
MAX16041 toc08
SINK CURRENT (mA)
V
OUT_
(V)
6
5
4
3
2
1
0.2
0.4
0.6
0.8
1.0
0
0
7
RESET OUTPUT LOW VOLTAGE
vs. SINK CURRENT
MAX16041 toc09
SINK CURRENT (mA)
RESET OUTPUT LOW VOLTAGE (V)
6
5
3
4
2
1
0.1
0.2
0.3
0.4
0.5
0.6
0.7
0.8
0.9
1.0
0
0
7
MAX16041/MAX16042/MAX16043
Dual-/Triple-/Quad-Voltage, Capacitor-
Adjustable, Sequencing/Supervisory Circuits
_______________________________________________________________________________________
5
RESET OUTPUT HIGH VOLTAGE
vs. SOURCE CURRENT
MAX16041 toc10
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
0
0
1.0
ENABLE TURN-OFF
MAX16041 toc11
4
µs/div
EN_
5V/div
OUT_
5V/div
RESET
5V/div
CRESET = V
CC
CDLY_ = OPEN
ENABLE TURN-ON
MAX16041 toc12
40ms/div
EN_
5V/div
OUT_
5V/div
RESET
5V/div
CRESET = V
CC
CDLY_ = OPEN
RESET TIMEOUT DELAY
MAX16041 toc13
100ms/div
IN_
5V/div
OUT_
5V/div
RESET
5V/div
CRESET = V
CC
CDLY_ = OPEN
MR FALLING vs. RESET
MAX16041 toc14
4
µs/div
RESET
5V/div
CRESET = V
CC
CDLY_ = OPEN
MR
5V/div
MR RISING vs. RESET
MAX16041 toc15
40ms/div
RESET
5V/div
CRESET = V
CC
CDLY_ = OPEN
MR
5V/div
MAXIMUM TRANSIENT DURATION
vs. THRESHOLD OVERDRIVE
MAX16041 toc16
THRESHOLD OVERDRIVE (mV)
MAXIMUM TRANSIENT DURATION (
µ
s)
100
10
10
20
30
40
50
60
70
80
90
100
0
1
1000
OUTPUT ASSERTED ABOVE THIS LINE
Typical Operating Characteristics (continued)
(V
CC
= 3.3V, T
A
= +25°C, unless otherwise noted.)
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