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19-1721; Rev 2; 2/03
3-Pin, Ultra-Low-Power SC70/SOT23 Voltage Detectors
General Description
The MAX6375-MAX6380 are ultra-low-power circuits used for monitoring battery, power-supply, and regulated system voltages. Each detector contains a precision bandgap reference, comparator, and internally trimmed resistors that set specified trip threshold voltages. These devices provide excellent circuit reliability and low cost by eliminating external components and adjustments when monitoring nominal system voltages from 2.5V to 5V. These circuits perform a single function: they assert an output signal whenever the VCC supply voltage falls below a preset threshold. The devices are differentiated by their output logic configurations and preset threshold voltages. The MAX6375/MAX6378 (push-pull) and MAX6377/MAX6380 (open-drain) have an active-low output (OUT is logic low when VCC is below VTH). The MAX6376/MAX6379 have an active-high push-pull output (OUT is logic high when VCC is below VTH). All parts are guaranteed to be in the correct output logic state for VCC down to 1V. The detector is designed to ignore fast transients on VCC. The MAX6375/MAX6376/ MAX6377 have voltage thresholds between 2.20V and 3.08V in approximately 100mV increments. The MAX6378/MAX6379/MAX6380 have voltage thresholds between 3.30V and 4.63V in approximately 100mV increments. Ultra-low supply current of 500nA (MAX6375/MAX6376/ MAX6377) makes these parts ideal for use in portable equipment. All six devices are available in a space-saving SC70 package or in a tiny SOT23 package.
Features
o Ultra-Low 500nA Supply Current (MAX6375/MAX6376/MAX6377) o Thresholds Available from 2.20V to 4.63V in Approximately 100mV Increments o 2.5% Threshold Accuracy Over Temperature o Low Cost o Available in Three Versions: Push-Pull OUT, Push-Pull OUT, and Open-Drain OUT o Power-Supply Transient Immunity o No External Components o Available in Either a 3-Pin SC70 or 3-Pin SOT23 Package
MAX6375-MAX6380
Ordering Information
PART* MAX6375UR _ _ -T MAX6375XR _ _ -T MAX6376UR _ _ -T MAX6376XR _ _ -T TEMP RANGE -40C to +85C -40C to +85C -40C to +85C -40C to +85C PIN-PACKAGE 3 SOT23-3 3 SC70-3 3 SOT23-3 3 SC70-3
Applications
Precision Battery Monitoring Load Switching/Power Sequencing Power-Supply Monitoring in Digital/Analog Systems Portable/Battery-Powered Equipment
*The MAX6375/MAX6376/MAX6377 are available in factory-preset thresholds from 2.20V to 3.08V, in approximately 0.1V increments. The MAX6378/MAX6379/MAX6380 are available in factory-preset thresholds from 3.30V to 4.63V, in approximately 0.1V increments. Choose the desired threshold suffix from Table 1 and insert it in the blank spaces following R. There are 21 standard versions, with a required order increment of 2500 pieces. Sample stock is generally held on the standard versions only (see the Selector Guide). The required order increment is 10,000 pieces for nonstandard versions (Table 2). Contact factory for availability. All devices available in tape-and-reel only.
Ordering information continued at end of data sheet
Pin Configuration
TOP VIEW
GND 1 MAX6375XR- MAX6380XR OUT(OUT) 1 3 VCC GND 2 MAX6375UR- MAX6380UR 3 VCC
Selector Guide appears at end of data sheet.
OUT(OUT) 2
SC70-3
( ) ARE FOR MAX6376/MAX6379 ONLY.
SOT23-3
________________________________________________________________ Maxim Integrated Products
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3-Pin, Ultra-Low-Power SC70/SOT23 Voltage Detectors MAX6375-MAX6380
ABSOLUTE MAXIMUM RATINGS
Terminal Voltage (with respect to GND) VCC ...........................................................................-0.3V to +6V OUT, OUT (push-pull) ................................-0.3V to (VCC + 0.3V) OUT (open-drain) .....................................................-0.3V to +6V Input Current (VCC) .............................................................20mA Output Current (OUT, OUT) ................................................20mA Continuous Power Dissipation (TA = +70C) 3-Pin SC70 (derate 2.17mW/C above +70C) ...........174mW 3-Pin SOT23 (derate 4mW/C above +70C)..............320mW Operating Temperature Range ...........................-40C to +85C Storage Temperature Range .............................-65C to +150C Junction Temperature ......................................................+150C Lead Temperature (soldering, 10s) .................................+300C
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
(VCC = full range, TA = -40C to +85C, unless otherwise noted. Typical values are at TA = +25C and VCC = 3V.) (Note 1) PARAMETER VCC Operating Range SYMBOL CONDITIONS TA = 0C to +70C TA = -40C to +85C ICC MAX6375/76/77 only, VCC = 3.0V for VTH 2.93V, VCC = 3.2V for VTH > 2.93V, no load VCC = 5.5V, no load TA = +25C Voltage Threshold VTH Table 1 TA = -40C to +85C Voltage Threshold Tempco Propagation Delay OUT Output Voltage (MAX6375/MAX6377/ MAX6378/MAX6380) OUT Output Voltage (MAX6375/MAX6377) VTH/C VCC = (VTH + 100mV) to (VTH - 100mV) VCC = (VTH - 100mV) to (VTH + 100mV) VOL ISINK = 1.6mA, VCC > 2.1V, OUT asserted ISINK = 100A, VCC 1.2V, OUT asserted ISOURCE = 500A, VCC = 3.2V, MAX6375 only VOH ISOURCE = 800A, VCC = 4.5V, VTH 4.38V ISOURCE = 800A, VCC = VTH(MAX), VTH 4.5V VOH OUT Output Voltage (MAX6376/MAX6379) VOL ISOURCE = 500A, VCC 2.1V, OUT asserted ISOURCE = 50A, VCC 1.2V, OUT asserted ISINK = 1.2mA, VCC 3.2V, OUT not asserted, MAX6376 only ISINK = 3.2mA, VCC 4.5V, OUT not asserted, VTH 4.38V ISINK = 3.2mA, VCC = VTH(MAX), VTH 4.5V Voltage Threshold Hysteresis Open-Drain OUT Output Leakage Current Note 1: Production tested at +25C only. Overtemperature limits are guaranteed by design, not production tested. MAX6375/MAX6376/MAX6377 MAX6378/MAX6379/MAX6380 6.3 9.5 0.1 0.8 VCC 0.8 VCC 0.8 VCC 0.8 VCC 0.8 VCC 0.3 0.4 0.4 mV A V V VTH - 2.5% VTH VTH + 2.5% 40 20 42 0.3 V 0.4 ppm/C s MIN 1.0 1.2 0.5 1.0 TYP MAX 5.5 5.5 1.0 1.75 UNITS V
Supply Current
A
VTH - 1.5% VTH VTH + 1.5% V
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3-Pin, Ultra-Low-Power SC70/SOT23 Voltage Detectors
__________________________________________Typical Operating Characteristics
(VCC = 5V, TA = +25C, unless otherwise noted.)
SUPPLY CURRENT vs. TEMPERATURE
0.9 0.8 SUPPLY CURRENT (A) 0.7 0.6 0.5 0.4 0.3 0.2 0.1 0 -40 -20 0 20 40 60 80 TEMPERATURE (C) VCC = 1.2V 0 -40 -20 0 VCC = 3.3V VCC = 5V
MAX6375-01
MAX6375-MAX6380
PROPAGATION DELAY (FALLING) vs. TEMPERATURE
200 PROPAGATION DELAY (s)
MAX6375-02
1.0
150
100
VOD = 20mV VOD = 10mV
50 VOD = 100mV VOD = 200mV 20 40 60 80 TEMPERATURE (C)
PROPAGATION DELAY (RISING) vs. TEMPERATURE
MAX6375-03
MAXIMUM TRANSIENT DURATION vs. THRESHOLD OVERDRIVE
MAXIMUM TRANSIENT DURATION (s)
MAX6375-04
140 120 PROPAGATION DELAY (s) 100 80 60 40 20 0 -40 -20 0 20 40 60 80 TEMPERATURE (C) VOD = 200mV VOD = 100mV VOD = 10mV
500
400
VOD = 20mV
300
200
OUT/OUT IS ASSERTED ABOVE LINE
100
0 1 10 100 1000 THRESHOLD OVERDRIVE VTH - VCC (mV)
Pin Description
PIN MAX6375/MAX6377/ MAX6378/MAX6380 SC70-3 1 2 SOT23-3 2 1 MAX6376/MAX6379 SC70-3 1 -- SOT23-3 2 -- GND OUT Ground Active-Low Output. OUT remains low while VCC is below the threshold. OUT is open-drain on the MAX6377/MAX6380 and push-pull on the MAX6375/MAX6378. Active-High Output. OUT remains high while VCC is below the threshold. Supply Voltage NAME FUNCTION
-- 3
-- 3
2 3
1 3
OUT VCC
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3-Pin, Ultra-Low-Power SC70/SOT23 Voltage Detectors MAX6375-MAX6380
____________ Applications Information
Interfacing to Different Logic Voltage Components
The MAX6377/MAX6380 have an active-low, opendrain output. This output structure sinks current when OUT is asserted. Connect a pullup resistor from OUT to any supply voltage up to 5.50V (Figure 1). Select a resistor value large enough to allow a valid logic low (see Electrical Characteristics), and small enough to register a logic high while supplying all input current and leakage paths connected to the OUT line.
Negative-Going VCC Transients
These devices are relatively immune to short-duration, negative-going VCC transients (glitches). The Typical Operating Characteristics show the Maximum Transient Duration vs. Threshold Overdrive graph, for which output pulses are not generated. The graph shows the maximum pulse width that a negative-going VCC transient may typically have before the devices issue output signals. As the amplitude of the transient increases, the maximum-allowable pulse width decreases.
VIN
DC/DC CONVERTER
VOUT
REGULATED 3.0V
VCC 3.6V Li+ VCC OUT
P MAX6377
(OPEN-DRAIN) SUSPEND
Figure 1. Interfacing to Different Logic Voltage Components
Table 1. Factory-Trimmed Reset Thresholds
RESET THRESHOLD VOLTAGE, VTH (V) PART SUFFIX MIN 22 23 24 MAX6375_R MAX6376_R MAX6377_R 25 26 27 28 29 30 31 2.167 2.285 2.364 2.462 2.591 2.660 2.758 2.886 2.955 3.034 TA = +25C TYP 2.200 2.320 2.400 2.500 2.630 2.700 2.800 2.930 3.000 3.080 MAX 2.233 2.355 2.436 2.537 2.669 2.741 2.842 2.974 3.045 3.126 TA = -40C TO +85C MIN 2.145 2.262 2.340 2.437 2.564 2.633 2.730 2.857 2.925 3.003 MAX 2.250 2.375 2.460 2.562 2.696 2.768 2.870 3.000 3.075 3.150
Factory-trimmed reset thresholds are available in approximately 100mV increments with a 1.5% room-temperature variance.
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3-Pin, Ultra-Low-Power SC70/SOT23 Voltage Detectors
Table 1. Factory-Trimmed Reset Thresholds (continued)
RESET THRESHOLD VOLTAGE, VTH (V) PART SUFFIX MIN 33 34 35 36 37 MAX6378_R MAX6379_R MAX6380_R 38 39 40 41 42 43 44 45 46 3.250 3.349 3.447 3.546 3.644 3.743 3.841 3.940 4.038 4.137 4.235 4.314 4.432 4.560 TA = +25C TYP 3.300 3.400 3.500 3.600 3.700 3.800 3.900 4.000 4.100 4.200 4.300 4.380 4.500 4.630 MAX 3.350 3.451 3.552 3.654 3.755 3.857 3.958 4.060 4.161 4.263 4.364 4.446 4.567 4.699 TA = -40C TO +85C MIN 3.217 3.315 3.412 3.510 3.607 3.705 3.802 3.900 3.997 4.095 4.192 4.270 4.387 4.514 MAX 3.383 3.485 3.587 3.690 3.792 3.895 3.997 4.100 4.202 4.305 4.407 4.489 4.612 4.746
MAX6375-MAX6380
Factory-trimmed reset thresholds are available in approximately 100mV increments with a 1.5% room-temperature variance.
Table 2. Device Marking Codes and Minimum Order Increments
PART MAX6375_R22-T MAX6375_R23-T MAX6375_R24-T MAX6375_R25-T MAX6375_R26-T MAX6375_R27-T MAX6375_R28-T MAX6375_R29-T MAX6375_R30-T MAX6375_R31-T MAX6376_R22-T MAX6376_R23-T MAX6376_R24-T MAX6376_R25-T MAX6376_R26-T MAX6376_R27-T MAX6376_R28-T MAX6376_R29-T TOP MARK TOP MARK ORDER (SC70) (SOT23) INCREMENT (k) ADH ADI -- -- ACZ -- -- ADJ -- ADK ADL ADM -- -- ADN -- -- ADA FZHD FZHE -- -- FZHC -- -- FZHF -- FZHG FZHH FZHI -- -- FZHJ -- -- FZHK 2.5 2.5 10 10 2.5 10 10 2.5 10 2.5 2.5 2.5 10 10 2.5 10 10 2.5 PART MAX6376_R30-T MAX6376_R31-T MAX6377_R22-T MAX6377_R23-T MAX6377_R24-T MAX6377_R25-T MAX6377_R26-T MAX6377_R27-T MAX6377_R28-T MAX6377_R29-T MAX6377_R30-T MAX6377_R31-T MAX6378_R33-T MAX6378_R34-T MAX6378_R35-T MAX6378_R36-T MAX6378_R37-T MAX6378_R38-T TOP MARK TOP MARK ORDER (SC70) (SOT23) INCREMENT (k) -- ADO ADP ADB -- -- ACQ -- -- ADC -- ADR -- -- -- -- -- -- -- FZHL FZHM FZHN -- -- FZHO -- -- FZHP -- FZHQ -- -- -- -- -- -- 10 2.5 2.5 2.5 10 10 2.5 10 10 2.5 10 2.5 10 10 10 10 10 10
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3-Pin, Ultra-Low-Power SC70/SOT23 Voltage Detectors MAX6375-MAX6380
Table 2. Device Marking Codes and Minimum Order Increments (continued)
PART MAX6378_R39-T MAX6378_R40-T MAX6378_R41-T MAX6378_R42-T MAX6378_R43-T MAX6378_R44-T MAX6378_R45-T MAX6378_R46-T MAX6379_R33-T MAX6379_R34-T MAX6379_R35-T MAX6379_R36-T MAX6379_R37-T MAX6379_R38-T MAX6379_R39-T MAX6379_R40-T MAX6379_R41-T MAX6379_R42-T TOP MARK TOP MARK ORDER (SC70) (SOT23) INCREMENT (k) -- -- -- -- -- ADS -- ADD -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- FZHU -- FZHV -- -- -- -- -- -- -- -- -- -- 10 10 10 10 10 2.5 10 2.5 10 10 10 10 10 10 10 10 10 10 PART MAX6379_R43-T MAX6379_R44-T MAX6379_R45-T MAX6379_R46-T MAX6380_R33-T MAX6380_R34-T MAX6380_R35-T MAX6380_R36-T MAX6380_R37-T MAX6380_R38-T MAX6380_R39-T MAX6380_R40-T MAX6380_R41-T MAX6380_R42-T MAX6380_R43-T MAX6380_R44-T MAX6380_R45-T MAX6380_R46-T TOP MARK TOP MARK ORDER (SC70) (SOT23) INCREMENT (k) -- ADE -- ADT -- -- -- -- -- -- -- -- -- -- -- ADU -- ADF -- FZHW -- FZHX -- -- -- -- -- -- -- -- -- -- -- FZHY -- FZHZ 10 2.5 10 2.5 10 10 10 10 10 10 10 10 10 10 10 2.5 10 2.5
___________________Chip Information Selector Guide (Standard Versions**)
PART MAX63 _ _ _ R46-T MAX63 _ _ _ R44-T MAX63 _ _ _ R31-T MAX63 _ _ _ R29-T MAX63 _ _ _ R26-T MAX63 _ _ _ R23-T MAX63 _ _ _ R22-T NOMINAL VTH (V) 4.63 4.38 3.08 2.93 2.63 2.32 2.20
TRANSISTOR COUNT: 419
Ordering Information (continued)
PART* MAX6377UR _ _ -T MAX6377XR _ _ -T MAX6378UR _ _ -T MAX6378XR _ _ -T MAX6379UR _ _ -T MAX6379XR _ _ -T MAX6380UR _ _ -T MAX6380XR _ _ -T TEMP RANGE -40C to +85C -40C to +85C -40C to +85C -40C to +85C -40C to +85C -40C to +85C -40C to +85C -40C to +85C PIN-PACKAGE 3 SOT23-3 3 SC70-3 3 SOT23-3 3 SC70-3 3 SOT23-3 3 SC70-3 3 SOT23-3 3 SC70-3
**Sample stock is generally held on all standard versions. Contact factory for availability of nonstandard versions.
*The MAX6375/MAX6376/MAX6377 are available in factory-preset thresholds from 2.20V to 3.08V, in approximately 0.1V increments. The MAX6378/MAX6379/MAX6380 are available in factory-preset thresholds from 3.30V to 4.63V, in approximately 0.1V increments. Choose the desired threshold suffix from Table 1 and insert it in the blank spaces following R. There are 21 standard versions, with a required order increment of 2500 pieces. Sample stock is generally held on the standard versions only (see the Selector Guide). The required order increment is 10,000 pieces for nonstandard versions (Table 2). Contact factory for availability. All devices available in tape-and-reel only.
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3-Pin, Ultra-Low-Power SC70/SOT23 Voltage Detectors
Package Information
(The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information, go to www.maxim-ic.com/packages.)
SOT23 L.EPS
MAX6375-MAX6380
Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are implied. Maxim reserves the right to change the circuitry and specifications without notice at any time.
Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600_____________________ 7 (c) 2003 Maxim Integrated Products Printed USA is a registered trademark of Maxim Integrated Products.

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