19-3869; Rev 1; 1/11
Low-Voltage, High-Accuracy, Quad Window
Voltage Detectors in Thin QFN
General Description
The MAX16008/MAX16009 are adjustable quad window
voltage detectors in a small thin QFN package. These
devices are designed to provide a higher level of sys-
tem reliability by monitoring multiple supply voltages
and providing a fault signal when any of the voltages
exceed their overvoltage thresholds or fall below their
undervoltage thresholds.
These devices offer user-adjustable thresholds that
allow voltages to be monitored down to 0.4V. These
devices allow the upper and lower trip thresholds of
each window detector to be set externally with the use
of three external resistors.
Each monitored threshold has an independent open-
drain output for signaling a fault condition. The outputs
can be wire OR’ed together to provide a single fault
output. The open-drain outputs are internally pulled up
with a 30µA current, but can be externally driven to
other voltage levels for interfacing to other logic levels.
Both devices feature a margin input to disable the out-
puts during margin testing or any other time after
power-up operations. The MAX16009 offers a reset out-
put that deasserts after a reset timeout period after all
voltages are within their threshold specifications. The
reset timeout is internally set to 140ms (min), but can
be externally adjusted to other reset timeouts using an
external capacitor. In addition, the MAX16009 offers a
manual reset input.
All devices are offered in a 4mm x 4mm TQFN package
and are fully specified from -40°C to +125°C.
♦
1.5% Accuracy Over Temperature
♦
User-Adjustable Thresholds (Down to 0.4V)
♦
Open-Drain Outputs with Internal Pullups Reduce
the Number of External Components
♦
Manual Reset Input (MAX16009)
♦
Margin Enable Input
♦
Fixed or Adjustable
RESET
Timeout (MAX16009)
♦
Guaranteed Correct Output Logic State Down to
V
CC
= 1V
♦
Fully Specified from -40°C to +125°C
♦
Small, 4mm x 4mm TQFN Package
Features
♦
Monitor Four Undervoltage/Overvoltage Conditions
MAX16008/MAX16009
Ordering Information
PART
MAX16008TP+
MAX16009TG+
TEMP RANGE
-40°C to +125°C
-40°C to +125°C
PIN-PACKAGE
20 TQFN
24 TQFN
+Denotes
a lead(Pb)-free/RoHS-compliant package.
For tape-and-reel, add a “T” after the “+.” Tape-and-reel are
offered in 2.5k increments.
Typical Operating Circuit
3.5V
2.5V
1.8V
1.5V
UVIN1
V
CC
RESET
UVOUT1
V
CC
RESET
μC
GND
Applications
Storage Equipment
Networking/Telecommunications Equipment
Multivoltage ASICs
Servers
OVIN1
OVOUT1
UVIN2
UVOUT2
MAX16009
OVIN2
OVOUT2
UVIN3
UVOUT3
OVIN3
OVOUT3
UVIN4
UVOUT4
OVIN4
GND
OVOUT4
Pin Configurations and Selector Guide appear at end of data
sheet.
________________________________________________________________
Maxim Integrated Products
1
For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642,
or visit Maxim’s website at www.maxim-ic.com.
Low-Voltage, High-Accuracy, Quad Window
Voltage Detectors in Thin QFN
MAX16008/MAX16009
ABSOLUTE MAXIMUM RATINGS
V
CC
,
OVOUT_, UVOUT_, RESET,
UVIN_, OVIN_ to GND .........................................-0.3V to +6V
MARGIN, MR,
TOL, SRT to GND................-0.3V to (V
CC
+ 0.3V)
Input/Output Current
(RESET,
MARGIN,
SRT,
MR, UVOUT_, OVOUT_)
.......±20mA
Continuous Power Dissipation (T
A
= +70°C)
20-Pin Thin QFN (derate 16.9mW/°C above +70°C) ....1355mW
24-Pin Thin QFN (derate 16.9mW/°C above +70°C) ....1666mW
Operating Temperature Range .........................-40°C to +125°C
Junction Temperature .....................................................+150°C
Storage Temperature Range .............................-65°C to +150°C
Lead Temperature (soldering, 10s) .................................+300°C
Soldering Temperature (reflow) .......................................+260°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
= 2.0V to 5.5V, TOL = GND, T
A
= -40°C to +125°C, unless otherwise specified. Typical values are at V
CC
= 3.3V, T
A
= +25°C.)
(Note 1)
PARAMETER
Operating Voltage Range
Supply Current (Note 3)
UVLO (Undervoltage Lockout)
UVIN_/OVIN_
Adjustable Threshold (UVIN_
Falling/OVIN_ Rising)
UVIN_/OVIN_ Hysteresis
UVIN_/OVIN_ Input Current
RESET
SRT = V
CC
Reset Timeout
t
RP
C
SRT
= 1500pF (Note 4)
C
SRT
= 100pF
C
SRT
= open
SRT Ramp Current
SRT Threshold
SRT Hysteresis
UVIN_/OVIN_ to Reset Delay
t
RD
UVIN_ falling/OVIN_ rising
I
SRT
V
TH_SRT
V
SRT
= 0V
460
1.173
140
2.43
200
3.09
0.206
0.05
600
1.235
100
20
740
1.293
nA
V
mV
µs
280
3.92
ms
V
TH
V
TH
_
HYS
I
IB
UVIN_ falling/OVIN_ rising (percentage of
the threshold)
-100
0.388
0.394
0.5
+100
0.400
V
% V
TH
nA
SYMBOL
V
CC
I
CC
V
UVLO
(Note 2)
V
CC
= 3.3V, outputs deasserted
V
CC
= 5V, outputs deasserted
V
CC
rising
1.62
CONDITIONS
MIN
1.0
45
45
1.8
TYP
MAX
5.5
65
70
1.98
UNITS
V
µA
V
2
_______________________________________________________________________________________
Low-Voltage, High-Accuracy, Quad Window
Voltage Detectors in Thin QFN
ELECTRICAL CHARACTERISTICS (continued)
(V
CC
= 2.0V to 5.5V, TOL = GND, T
A
= -40°C to +125°C, unless otherwise specified. Typical values are at V
CC
= 3.3V, T
A
= +25°C.)
(Note 1)
PARAMETER
RESET
Output-Voltage Low
SYMBOL
V
OL
CONDITIONS
V
CC
= 3.3V, I
SINK
= 10mA,
RESET
asserted
V
CC
= 2.5V, I
SINK
= 6mA,
RESET
asserted
V
CC
= 1.2V, I
SINK
= 50µA,
RESET
asserted
RESET
Output-Voltage High
MR
Input-Voltage Low
MR
Input-Voltage High
MR
Minimum Pulse Width
MR
Glitch Rejection
MR
to
RESET
Delay
MR
Pullup Resistance
OUTPUTS (UVOUT_/OVOUT_)
UVOUT_, OVOUT_
Output-
Voltage Low
OVOUT_, OVOUT_
Output-
Voltage High
UVIN_/OVIN_ to
UVOUT_/ OVOUT_
Propagation Delay
DIGITAL LOGIC
TOL Input-Voltage Low
TOL Input-Voltage High
TOL Input Current
MARGIN
Input-Voltage Low
MARGIN
Input-Voltage High
MARGIN
Pullup Resistance
MARGIN
Delay Time
t
MD
V
IL
V
IH
Pulled up to V
CC
Rising or falling (Note 5)
0.7 x
V
CC
12
20
50
28
V
IL
V
IH
TOL = V
CC
0.7 x
V
CC
100
0.3 x
V
CC
0.3 x
V
CC
V
V
nA
V
V
kΩ
µs
V
OL
V
OH
t
D
V
CC
= 3.3V, I
SINK
= 2mA
V
CC
= 2.5V, I
SINK
= 1.2mA
V
CC
≥
2.0V, I
SOURCE
= 6µA
(V
TH
- 100mV) to (V
TH
+ 100mV)
0.8 x
V
CC
20
0.30
0.30
V
V
µs
12
V
OH
V
IL
V
IH
0.7 x
V
CC
1
100
200
20
28
V
CC
≥
2.0V, I
SOURCE
= 6µA,
RESET
deasserted
0.8 x
V
CC
0.3 x
V
CC
MIN
TYP
MAX
0.30
0.30
0.30
V
V
V
µs
ns
ns
kΩ
V
UNITS
MAX16008/MAX16009
Note 1:
Note 2:
Note 3:
Note 4:
Devices are tested at T
A
= +25°C and guaranteed by design for T
A
= T
MIN
to T
MAX
.
The outputs are guaranteed to be in the correct logic state down to V
CC
= 1V.
Measured with
MR
and
MARGIN
unconnected.
The minimum and maximum specifications for this parameter are guaranteed by using the worse case of the SRT current
and SRT threshold specifications. Do not set the reset timeout period to more than 1.12s.
Note 5:
Amount of time required for logic to lock/unlock outputs from margin testing
_______________________________________________________________________________________
3
Low-Voltage, High-Accuracy, Quad Window
Voltage Detectors in Thin QFN
MAX16008/MAX16009
Typical Operating Characteristics
(V
CC
= 3.3V, T
A
= +25°C, unless otherwise noted.)
SUPPLY CURRENT
vs. SUPPLY VOLTAGE
MAX16008 toc01
SUPPLY CURRENT
vs. TEMPERATURE
MARGIN AND MR
UNCONNECTED
V
CC
= 5V
MAX16008 toc02
UVIN_/OVIN_ THRESHOLD
vs. SUPPLY VOLTAGE
MAX16008 toc03
60
55
SUPPLY CURRENT (μA)
50
45
40
35
30
1.5
2.0
2.5
3.0
3.5
4.0
4.5
5.0
MARGIN AND MR
UNCONNECTED
65
60
SUPPLY CURRENT (μA)
55
50
45
V
CC
= 3.3V
40
35
30
V
CC
= 2.5V
0.450
0.425
INPUT THRESHOLD
0.400
0.375
0.350
-40 -25 -10 5 20 35 50 65 80 95 110 125
TEMPERATURE (°C)
1.5
2.0
2.5
3.0
3.5
4.0
4.5
5.0
5.5
SUPPLY VOLTAGE (V)
5.5
SUPPLY VOLTAGE (V)
UVIN_/OVIN_ THRESHOLD
vs. TEMPERATURE
MAX16008 toc04
OUTPUT VOLTAGE
vs. SINK CURRENT
MAXIMUM TRANSIENT DURATION (μs)
100
MAX16008 toc05
MAXIMUM TRANSIENT DURATION
vs. INPUT OVERDRIVE
OUTPUT GOES LOW
ABOVE THIS LINE
MAX16008 toc06
0.45
0.44
0.43
INPUT THRESHOLD
0.42
600
500
400
300
200
100
0
75
V
OUT_
(mV)
0.41
0.40
0.39
0.38
0.37
0.36
0.35
-40 -25 -10 5 20 35 50 65 80 95 110 125
TEMPERATURE (°C)
50
25
UVOUT_ / OVOUT_ LOW
0
0
1
2
3
4
5
6
7
8
SINK CURRENT (mA)
1
10
100
1000
INPUT OVERDRIVE (mV)
4
_______________________________________________________________________________________
Low-Voltage, High-Accuracy, Quad Window
Voltage Detectors in Thin QFN
Typical Operating Characteristics (continued)
(V
CC
= 3.3V, T
A
= +25°C, unless otherwise noted.)
MAX16008/MAX16009
RESET TIMEOUT PERIOD
vs. TEMPERATURE
197
RESET TIMEOUT PERIOD (ms)
196
195
194
193
192
191
190
-40 -25 -10 5 20 35 50 65 80 95 110 125
TEMPERATURE (°C)
MAX16008 toc07
RESET TIMEOUT DELAY
MAX16008 toc08
198
UVIN1
1V/div
UVOUT1
2V/div
RESET
2V/div
SRT = V
CC
40ms/div
UVIN_ TO UVOUT_ DELAY TIME
MAX16008 toc09
MARGIN ENABLE FUNCTION
MAX16008 toc10
UVIN1
2V/div
MARGIN
2V/div
UVOUT_
2V/div
UVOUT1
2V/div
RESET
2V/div
UVIN_ BELOW RESPECTIVE THRESHOLDS
4μs/div
100μs/div
_______________________________________________________________________________________
5
PCB设计
