19-0622; Rev 0; 8/06
Dual-/Triple-/Quad-Voltage, Capacitor-
Adjustable, Sequencing/Supervisory Circuits
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.
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
Ordering Information
PART*
MAX16041TE+
MAX16042TP+
MAX16043TG+
TEMP RANGE
-40°C to +125°C
-40°C to +125°C
-40°C to +125°C
PIN-
PACKAGE
16 TQFN
20 TQFN
24 TQFN
PKG
CODE
T1644-4
T2044-3
T2444-4
+Denotes
lead-free package.
*For
tape and reel, add a “T” after the “+.” All tape and reel
orders are available in 2.5k increments.
Applications
RESET
OUT1
Pin Configurations
OUT3
TH0
13
12
11
10
TH1
EN4
EN3
EN2
EN1
GND
9
8
7
1
V
CC
2
IN1
3
IN2
4
IN3
5
IN4
6
TOL
DC-DC Supplies
Servers/Workstations
Storage Systems
Networking/Telecommunication Equipment
TOP VIEW
18
MR 19
CRESET 20
CDLY4 21
17
16
OUT2
15
14
Selector Guide
PART
MAX16041
MAX16042
MAX16043
MONITORED
VOLTAGES
2
3
4
INDEPENDENT
OUTPUTS
2 (Open-drain)
3 (Open-drain)
4 (Open-drain)
RESET
OUTPUT
Push-pull
Push-pull
Push-pull
CDLY3 22
CDLY2 23
CDLY1 24
MAX16043
+
TQFN
(4mm x 4mm)
Pin Configurations continued at end of data sheet.
________________________________________________________________
Maxim Integrated Products
1
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.
OUT4
Multivoltage Systems
Dual-/Triple-/Quad-Voltage, Capacitor-
Adjustable, Sequencing/Supervisory Circuits
MAX16041/MAX16042/MAX16043
ABSOLUTE MAXIMUM RATINGS
(All voltages referenced to GND.)
V
CC
.........................................................................-0.3V to +30V
EN1–EN4 ....................................................-0.3V to (V
CC
+ 0.3V)
OUT1–OUT4 ...........................................................-0.3V to +30V
RESET.........................................................-0.3V
to (V
CC
+ 0.3V)
IN1–IN4.......................................................-0.3V to (V
CC
+ 0.3V)
MR,
TOL, TH1, TH0 ....................................-0.3V to (V
CC
+ 0.3V)
CDLY1–CDLY4 .........................................................-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
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.
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)
PARAMETER
SUPPLY
Operating Voltage Range
Undervoltage Lockout
Undervoltage-Lockout Hysteresis
V
CC
UVLO
(Note 2)
(Note 2)
2.2
1.8
1.9
50
V
CC
= 3.3V
V
CC
= 12V
V
CC
= 28V
2.970
2.805
2.250
2.125
1.620
1.530
1.350
1.275
1.080
1.020
0.492
0.463
500
-100
40
47
52
3.052
2.888
2.313
2.187
1.665
1.575
1.387
1.312
1.110
1.050
0.5
0.472
0.5
Fixed threshold
I
L
Adjustable threshold only (V
IN_
= 1V)
918
+100
75
75
80
3.135
2.970
2.375
2.250
1.710
1.620
1.425
1.350
1.140
1.080
0.508
0.481
V
%
kΩ
nA
V
µA
28.0
2.0
V
V
mV
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
UVLO
HYST
V
CC
falling
All OUT_ and
RESET
at
logic-high (IN_ current
excluded)
V
CC
Supply Current
INPUTS (IN_)
I
CC
3.3V threshold, TOL = GND
3.3V threshold, TOL = V
CC
2.5V threshold, TOL = GND
2.5V threshold, TOL = V
CC
IN_ Thresholds (IN_ Falling)
V
TH
1.8V threshold, TOL = GND
1.8V threshold, TOL = V
CC
1.5V threshold, TOL = GND
1.5V threshold, TOL = V
CC
1.2V threshold, TOL = GND
1.2V threshold, TOL = V
CC
Adjustable Threshold
(IN_ Falling)
IN_ Hysteresis (IN_ Rising)
IN_ Input Resistance
IN_ Input Current
V
TH
V
HYST
TOL = GND
TOL = V
CC
2
_______________________________________________________________________________________
Dual-/Triple-/Quad-Voltage, Capacitor-
Adjustable, Sequencing/Supervisory Circuits
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
CRESET AND CDLY_
CRESET Threshold
CRESET Charge Current
CDLY_ Threshold
CDLY_ Charge Current
Input Low Voltage
Input High Voltage
TH1, TH0 Logic-Input Floating
TOL, TH1, TH0 Logic-Input
Current
EN_ Input Leakage Current
MR
Internal Pullup Current
OUTPUTS (OUT_,
RESET)
Output Low Voltage
(Open-Drain or Push-Pull)
Output High Voltage (Push-Pull)
Output Leakage Current
(Open-Drain)
Reset Timeout Period
TIMING
IN_ to OUT_ Propagation Delay
IN_ to
RESET
Propagation Delay
MR
Minimum Input Pulse Width
EN_ or
MR
Glitch Rejection
t
OFF
EN_ to OUT_ Delay
MR
to
RESET
Delay
t
ON
From device enabled to device disabled
From device disabled to device enabled
(CDLY_ open)
MR
falling
t
DELAY+
t
DELAY-
IN_ rising, CDLY_ open
IN_ falling, CDLY_ open
(Note 3)
2
280
3
30
3
µs
µs
35
20
35
µs
µs
µs
ns
V
CC
≥
1.2V, I
SINK
= 90µA
V
OL
V
CC
≥
2.25V, I
SINK
= 0.5mA
V
CC
≥
4.5V, I
SINK
= 1mA
V
OH
I
LKG
t
RP
V
CC
≥
3V, I
SOURCE
= 500µA
V
CC
≥
4.5V, I
SOURCE
= 800µA
Output not asserted low, V
OUT
= 28V
CRESET = V
CC
, V
CC
= 3.3V
CRESET open
140
190
0.030
0.8 x V
CC
0.8 x V
CC
1
260
0.3
0.3
0.35
V
µA
ms
V
V
TOL
, V
TH1
, V
TH0
= GND or V
CC
V
EN_
= V
CC
or GND
V
CC
= 3.3V
-1
-100
250
535
V
TH-RESET
I
CH-RESET
V
TH-CDLY
I
CH-CDLY
V
IL
V
IH
1.4
0.6
+1
+100
820
CRESET rising, V
CC
= 3.3V
V
CC
= 3.3V
CDLY_ rising, V
CC
= 3.3V
V
CC
= 3.3V
0.465
380
0.95
200
0.5
500
1
250
0.535
620
1.05
300
0.4
V
nA
V
nA
V
V
V
µA
nA
nA
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
MAX16041/MAX16042/MAX16043
DIGITAL LOGIC INPUTS (EN_,
MR,
TOL, TH1, TH0)
t
RST-DELAY
CRESET open, IN_ falling
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.
_______________________________________________________________________________________
3
Dual-/Triple-/Quad-Voltage, Capacitor-
Adjustable, Sequencing/Supervisory Circuits
MAX16041/MAX16042/MAX16043
Typical Operating Characteristics
(V
CC
= 3.3V, T
A
= +25°C, unless otherwise noted.)
SUPPLY CURRENT
vs. SUPPLY VOLTAGE
MAX16041 toc01
SUPPLY CURRENT
vs. TEMPERATURE
V
CC
= 28V
55
SUPPLY CURRENT (µA)
50
45
V
CC
= 12V
40
35
30
V
CC
= 3.3V
MAX16041
MAX16041 toc02
NORMALIZED ADJUSTABLE THRESHOLD
vs. TEMPERATURE
1.003
1.002
1.001
1.000
0.999
0.998
0.997
0.996
0.995
0.994
0.993
0.992
0.991
0.990
TOL = V
CC
MAX16041 toc03
60
MAX16041
55
SUPPLY CURRENT (µA)
50
45
40
35
30
2
6
10
14
18
22
26
60
NORMALIZED THRESHOLD
TOL = GND
ADJUSTABLE THRESHOLD
-40 -25 -10 5 20 35 50 65 80 95 110 125
TEMPERATURE (°C)
30
-40 -25 -10 5 20 35 50 65 80 95 110 125
TEMPERATURE (°C)
SUPPLY VOLTAGE (V)
NORMALIZED ADJUSTABLE THRESHOLD
vs. TEMPERATURE
1.003
1.002
1.001
1.000
0.999
0.998
0.997
0.996
0.995
0.994
0.993
0.992
0.991
0.990
MAX16041 toc04
OUT_ DELAY vs. C
CDLY_
4500
4000
OUT_ DELAY (ms)
3500
3000
2500
2000
1500
1000
MAX16041 toc05
RESET TIMEOUT PERIOD
vs. C
CRESET
1200
1100
1000
900
800
700
600
500
400
300
200
100
0
0 100 200 300 400 500 600 700 800 900 1000
C
CRESET
(nF)
MAX16041 toc06
5000
TOL = V
CC
TOL = GND
3.3V THRESHOLD
-40 -25 -10 5 20 35 50 65 80 95 110 125
TEMPERATURE (°C)
500
0
0 100 200 300 400 500 600 700 800 900 1000
C
CDLY_
(nF)
RESET TIMEOUT PERIOD (ms)
NORMALIZED THRESHOLD
FIXED RESET TIMEOUT PERIOD
vs. TEMPERATURE
189
188
187
V
OUT_
(V)
186
185
184
183
182
181
180
-40 -25 -10 5 20 35 50 65 80 95 110 125
TEMPERATURE (°C)
0
0
1
0.2
0.6
CRESET = V
CC
MAX16041 toc07
OUT_ LOW VOLTAGE
vs. SINK CURRENT
MAX16041 toc08
RESET OUTPUT LOW VOLTAGE
vs. SINK CURRENT
0.9
RESET OUTPUT LOW VOLTAGE (V)
0.8
0.7
0.6
0.5
0.4
0.3
0.2
0.1
0
MAX16041 toc09
190
FIXED RESET TIMEOUT PERIOD (ms)
1.0
1.0
0.8
0.4
2
5
SINK CURRENT (mA)
3
4
6
7
0
1
2
3
4
5
6
7
SINK CURRENT (mA)
4
_______________________________________________________________________________________
Dual-/Triple-/Quad-Voltage, Capacitor-
Adjustable, Sequencing/Supervisory Circuits
Typical Operating Characteristics (continued)
(V
CC
= 3.3V, T
A
= +25°C, unless otherwise noted.)
MAX16041/MAX16042/MAX16043
RESET OUTPUT HIGH VOLTAGE
vs. SOURCE CURRENT
MAX16041 toc10
ENABLE TURN-OFF
MAX16041 toc11
ENABLE TURN-ON
MAX16041 toc12
3.5
RESET OUTPUT HIGH VOLTAGE (V)
3.0
2.5
2.0
1.5
1.0
0.5
0
0
CRESET = V
CC
CDLY_ = OPEN
EN_
5V/div
CRESET = V
CC
CDLY_ = OPEN
EN_
5V/div
OUT_
5V/div
OUT_
5V/div
RESET
5V/div
0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0
SOURCE CURRENT (mA)
4µs/div
40ms/div
RESET
5V/div
RESET TIMEOUT DELAY
MAX16041 toc13
MR FALLING vs. RESET
MAX16041 toc14
CRESET = V
CC
CDLY_ = OPEN
IN_
5V/div
CRESET = V
CC
CDLY_ = OPEN
MR
5V/div
OUT_
5V/div
RESET
5V/div
RESET
5V/div
100ms/div
4µs/div
MR RISING vs. RESET
MAX16041 toc15
MAXIMUM TRANSIENT DURATION
vs. THRESHOLD OVERDRIVE
MAXIMUM TRANSIENT DURATION (µs)
90
80
70
60
50
40
30
20
10
0
1
10
100
1000
OUTPUT ASSERTED ABOVE THIS LINE
MAX16041 toc16
100
CRESET = V
CC
CDLY_ = OPEN
MR
5V/div
RESET
5V/div
40ms/div
THRESHOLD OVERDRIVE (mV)
_______________________________________________________________________________________
5
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