MAX6361MAX6364
19-1615; Rev 4; 10/11
SOT23, Low-Power P Supervisory Circuits
with Battery Backup
General Description Features
The MAX6361MAX6364 supervisory circuits reduce the
Low +1.2V Operating Supply Voltage
complexity and number of components required for
(V or V )
CC BATT
power-supply monitoring and battery control functions in
Precision Monitoring of +5.0V, +3.3V, +3.0V, and
microprocessor (P) systems. The circuits significantly
+2.5V Power-Supply Voltages
improve system reliability and accuracy compared to that
Debounced Manual Reset Input (MAX6361)
obtainable with separate ICs or discrete components.
Watchdog Timer with 1.6s Timeout Period
Their functions include P reset, backup battery
(MAX6362)
switchover, and power failure warning.
Battery-On Output Indicator (MAX6363)
The MAX6361MAX6364 operate from supply voltages as
Auxiliary User-Adjustable RESET IN (MAX6364)
low as +1.2V. The factory-preset reset threshold voltage
Three Available Output Structures
ranges from 2.32V to 4.63V (see Ordering Information).
Push-Pull RESET, Open-Drain RESET,
These devices provide a manual reset input (MAX6361),
watchdog timer input (MAX6362), battery-on output Open-Drain RESET
(MAX6363), and an auxiliary adjustable reset input
RESET/RESET Valid Down to 1.2V Guaranteed
(MAX6364). In addition, each part type is offered in three
(V or V )
CC BATT
reset output versions: an active-low open-drain reset, an
Power-Supply Transient Immunity
active-low open-drain reset, and an active-high open-
150ms (min) Reset Timeout Period
drain reset (see Selector Guide at end of data sheet).
Small 6-Pin SOT23 Package
Ordering Information
Applications
PART TEMP RANGE PIN-PACKAGE
MAX6361LUT_ _-T -40C to +85C 6 SOT23
Computers Fax Machines
MAX6361PUT_ _-T -40C to +85C 6 SOT23
Controllers Industrial Control
MAX6361HUT_ _-T -40C to +85C 6 SOT23
Intelligent Instruments POS Equipment
MAX6362LUT_ _-T -40C to +85C 6 SOT23
Critical P/C Portable/Battery-Powered MAX6362PUT_ _-T -40C to +85C 6 SOT23
Power Monitoring Equipment
MAX6362HUT_ _-T -40C to +85C 6 SOT23
MAX6363LUT_ _-T -40C to +85C 6 SOT23
MAX6363PUT_ _-T -40C to +85C 6 SOT23
MAX6363HUT_ _-T -40C to +85C 6 SOT23
Pin Configurations
MAX6364LUT_ _-T
-40C to +85C 6 SOT23
MAX6364PUT_ _-T -40C to +85C 6 SOT23
TOP VIEW
MAX6364HUT_ _-T -40C to +85C 6 SOT23
Note: These parts offer a choice of reset threshold voltages.
From the table below, select the suffix corresponding to the
RESET, RESET16 BATT
desired threshold voltage and insert it into the part number to
complete it. When ordering from the factory, there is a 2500-
MAX6361
piece minimum on the SOT package (tape-and-reel only).
GND 2 5 OUT
Devices are available in both leaded and lead-free packaging.
Specify lead-free by replacing- with+ when ordering.
RESET THRESHOLD RANGES (V)
MR34 V
CC
SUFFIX
MIN TYP MAX
46 4.50 4.63 4.75
SOT23-6
44 4.25 4.38 4.50
Pin Configurations continued at end of data sheet.
31 3.00 3.08 3.15
29 2.85 2.93 3.00
Selector Guide appears at end of data sheet.
26 2.55 2.63 2.70
Typical Operating Circuit appears at end of data sheet.
23 2.25 2.32 2.38
________________________________________________________________ Maxim Integrated Products 1
For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642,
or visit Maxims website at www.maxim-ic.com.SOT23, Low-Power P Supervisory Circuits
with Battery Backup
ABSOLUTE MAXIMUM RATINGS
Terminal Voltages (with respect to GND) Output Current
V , BATT, OUT.......................................................-0.3V to +6V OUT................................Short-Circuit Protection for up to 10s
CC
RESET (open drain), RESET (open drain)................-0.3V to +6V RESET, RESET, BATT ON ..............................................20mA
BATT ON, RESET (push-pull), RESET IN, Continuous Power Dissipation (T = +70C)
A
6-Pin SOT23 (derate 8.70mW/C above +70C) .........696mW
WDI.......................................................-0.3V to (V + 0.3V)
OUT
Operating Temperature Range ...........................-40C to +85C
MR .............................................................-0.3V to (V + 0.3V)
CC
Junction Temperature......................................................+150C
Input Current
Storage Temperature Range .............................-65C to +150C
V Peak ............................................................................1A
CC
Lead Temperature (soldering, 10s) .................................+300C
V Continuous ............................................................250mA
CC
Soldering Temperature (reflow)
BATT Peak ....................................................................250mA
Lead(Pb)-free...............................................................+260C
BATT Continuous ............................................................40mA
Packages containing lead(Pb).....................................+240C
GND ................................................................................75mA
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 = +2.4V to +5.5V, V = 3V, T = -40C to +85C, reset not asserted. Typical values are at T = +25C, unless otherwise
CC BATT A A
noted.) (Note 1)
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
Operating Voltage Range, V ,
CC
No load (Note 2) 0 5.5 V
V or V V
CC BATT BATT
V = 2.8V 10 30
CC
No load, V > V ,
CC TH
Supply Current
I WDI = V or GND V = 3.6V 11 35 A
CC CC CC
(Excluding I )
OUT
(MAX6362)
V = 5.5V 15 50
CC
T = +25C 1
I in Battery-Backup V = 2.8V, A
SUPPLY BATT
I A
SUPPLY
Mode (Excluding I ) V = 0V
OUT CC T = -40C to +85C 3
A
T = +25C -0.1 0.02
A
5.5V > V >
CC
BATT Standby Current I A
BATT
(V + 0.2V)
BATT T = -40C to +85C -1.0 0.05
A
V = 4.75V, I 150mA 2.75
CC OUT
V to OUT On-Resistance R V = 3.15V, I 65mA 3.0
CC ON CC OUT
V = 2.38V, I 25mA 4.6
CC OUT
V = 4.5V, I 20mA V - 0.2
BATT OUT BATT
V in Battery-Backup Mode V = 3.0V, I 10mA V - 0.15 V
OUT BATT OUT BATT
V = 2.25V, I 5mA V - 0.15
BATT OUT BATT
Power-up 20
Battery-Switchover Threshold
V < V mV
CC TH
(V - V )
CC BATT Power-down -20
MAX636_UT46 4.50 4.63 4.75
MAX636_UT44 4.25 4.38 4.50
MAX636_UT31 3.00 3.08 3.15
Reset Threshold V V
TH
MAX636_UT29 2.85 2.93 3.00
MAX636_UT26 2.55 2.63 2.70
MAX636_UT23 2.25 2.32 2.38
V Falling Reset Delay V falling at 10V/ms 35 s
CC CC
Reset-Active Timeout Period t 150 280 ms
RP
2 _______________________________________________________________________________________
MAX6361MAX6364