19-0525; Rev 3; 1/07
KIT
ATION
EVALU
BLE
AVAILA
Dual-/Triple-/Quad-Voltage, Capacitor-
Adjustable, Sequencing/Supervisory Circuits
General Description
The MAX16025–MAX16030 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–MAX16030 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°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/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°C to +125°C
MAX16025–MAX16030
Ordering Information
PART*
MAX16025TE+
MAX16026TE+
MAX16027TP+
MAX16028TP+
MAX16029TG+
TEMP RANGE
-40°C to +125°C
-40°C to +125°C
-40°C to +125°C
-40°C to +125°C
-40°C to +125°C
PIN-
PACKAGE
16 TQFN
16 TQFN
20 TQFN
20 TQFN
24 TQFN
PKG
CODE
T1644-4
T1644-4
T2044-3
T2044-3
T2444-4
Applications
Multivoltage Systems
DC-DC Supplies
Servers/Workstations
Storage Systems
Networking/Telecommunication Equipment
MAX16030TG+
-40°C to +125°C 24 TQFN
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.
Pin Configurations
RESET
OUT1
OUT3
18
MR 19
CRESET 20
17
16
15
14
13
12
11
10
TH1
EN4
EN3
EN2
EN1
GND
TH0
9
8
7
1
V
CC
2
IN1
3
IN2
4
IN3
5
IN4
6
TOL
TOP VIEW
Selector Guide
PART
MAX16025
MAX16026
MAX16027
MAX16028
MAX16029
MAX16030
MONITORED
VOLTAGES
2
2
3
3
4
4
INDEPENDENT
OUTPUTS
2 (Open-drain)
2 (Push-pull)
3 (Open-drain)
3 (Push-pull)
4 (Open-drain)
4 (Push-pull)
RESET
OUTPUT
Open-drain
Push-pull
Open-drain
Push-pull
Open-drain
Push-pull
CDLY4 21
CDLY3 22
CDLY2 23
CDLY1 24
MAX16029
MAX16030
+
THIN QFN
(4mm x 4mm)
Pin Configurations continued at end of data sheet.
1
________________________________________________________________
Maxim Integrated Products
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.
OUT2
OUT4
Dual-/Triple-/Quad-Voltage, Capacitor-
Adjustable, Sequencing/Supervisory Circuits
MAX16025–MAX16030
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 (push-pull).............................-0.3V to (V
CC
+ 0.3V)
OUT1–OUT4 (open-drain) ......................................-0.3V to +30V
RESET
(push-pull) ......................................-0.3V to (V
CC
+ 0.3V)
RESET
(open-drain) ..................................................-0.3V to 30V
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
35
20
35
2
280
3
30
3
µs
µs
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
MAX16025–MAX16030
DIGITAL LOGIC INPUTS (EN_,
MR,
TOL, TH1, TH0)
t
RST-DELAY
IN_ falling
(Note 3)
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:
In order to guarantee an assertion, the minimum input pulse width must be greater than 2µs.
_______________________________________________________________________________________
3
Dual-/Triple-/Quad-Voltage, Capacitor-
Adjustable, Sequencing/Supervisory Circuits
MAX16025–MAX16030
Typical Operating Characteristics
(V
CC
= 3.3V, T
A
= +25°C, unless otherwise noted.)
SUPPLY CURRENT
vs. SUPPLY VOLTAGE
MAX16025 toc01
SUPPLY CURRENT
vs. TEMPERATURE
V
CC
= 28V
55
SUPPLY CURRENT (μA)
50
45
V
CC
= 12V
40
35
30
V
CC
= 3.3V
MAX16026
MAX16025 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
MAX16025 toc03
60
MAX16026
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
TOL = V
CC
MAX16025 toc04
OUT_ DELAY vs. C
CDLY_
4500
4000
OUT_ DELAY (ms)
3500
3000
2500
2000
1500
1000
MAX16025 toc05
RESET TIMEOUT PERIOD
vs. C
CRESET
MAX16025 toc06
5000
RESET TIMEOUT PERIOD (ms)
1200
1100
1000
900
800
700
600
500
400
300
200
100
0
NORMALIZED THRESHOLD
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)
0 100 200 300 400 500 600 700 800 900 1000
C
CRESET
(nF)
FIXED RESET TIMEOUT PERIOD
vs. TEMPERATURE
194
193
192
CRESET = V
CC
MAX16025 toc07
OUT_ LOW VOLTAGE
vs. SINK CURRENT
MAX16025 toc08
OUT_ HIGH VOLTAGE
vs. SOURCE CURRENT
MAX16025 toc09
195
FIXED RESET TIMEOUT PERIOD (ms)
1.0
3.5
3.0
2.5
0.8
V
OUT_
(V)
191
190
189
188
187
186
185
-40 -25 -10 5 20 35 50 65 80 95 110 125
TEMPERATURE (°C)
V
OUT_
(V)
0.6
2.0
1.5
1.0
0.4
0.2
0.5
PUSH-PULL VERSIONS
0
0
1
2
5
SINK CURRENT (mA)
3
4
6
7
0
0
0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0
SOURCE 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.)
MAX16025–MAX16030
RESET OUTPUT LOW VOLTAGE
vs. SINK CURRENT
MAX16025 toc10
RESET OUTPUT HIGH VOLTAGE
vs. SOURCE CURRENT
MAX16025 toc11
ENABLE TURN-OFF
MAX16025 toc12
1.0
0.9
RESET OUTPUT LOW VOLTAGE (V)
0.8
0.7
0.6
0.5
0.4
0.3
0.2
0.1
0
0
1
2
3
4
5
6
7
SINK CURRENT (mA)
3.5
RESET OUTPUT HIGH VOLTAGE (V)
3.0
2.5
2.0
1.5
1.0
0.5
PUSH-PULL VERSIONS
0
0
CRESET = V
CC
CDLY_ = OPEN
EN_
OUT_
RESET
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
ENABLE TURN-ON
MAX16025 toc13
RESET TIMEOUT DELAY
MAX16025 toc14
MR FALLING vs. RESET
MAX16025 toc15
CRESET = V
CC
CDLY_ = OPEN
EN_
CRESET = V
CC
CDLY_ = OPEN
IN_
CRESET = V
CC
CDLY_ = OPEN
MR
OUT_
OUT_
RESET
RESET
RESET
40ms/div
100ms/div
4μs/div
MR RISING vs. RESET
MAX16025 toc16
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
MAX16025 toc17
100
CRESET = V
CC
CDLY_ = OPEN
MR
RESET
40ms/div
THRESHOLD OVERDRIVE (mV)
_______________________________________________________________________________________
5
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