19-0541; Rev 3; 3/10
Low-Power, 1% Accurate, Dual-/Triple-/Quad-Level
Battery Monitors in Small TDFN and TQFN Packages
General Description
The MAX6782–MAX6790 are low-power, 1% accurate,
dual-/triple-/quad-level battery monitors offered in small
TDFN and TQFN packages. These devices are ideal for
monitoring single lithium-ion (Li+) cells, or multicell alka-
line/NiCd/NiMH power sources. These devices feature
fixed and adjustable hysteresis options to eliminate out-
put chattering associated with battery-voltage monitors.
The MAX6782/MAX6783 offer four battery monitors in a
single package with factory-set (0.5%, 5%, 10%) or
adjustable hysteresis. The MAX6784/MAX6785 provide
three battery monitors with factory-set (0.5%, 5%, 10%)
or adjustable hysteresis. The MAX6786/MAX6787/
MAX6788 offer two battery monitors with external inputs
for setting the rising and falling thresholds, allowing
external hysteresis control. The MAX6789/MAX6790 fea-
ture quad-level overvoltage detectors with complemen-
tary outputs.
The MAX6782–MAX6790 are offered with either open-drain
or push-pull outputs. The MAX6782/MAX6784/MAX6786/
MAX6789 are available with push-pull outputs while the
MAX6783/MAX6785/MAX6787/MAX6790 are available with
open-drain outputs. The MAX6788 is available with one
open-drain output and one push-pull output (see the
Selector Guide).
This family of devices is offered in space-
saving TDFN and TQFN packages and is fully specified
over the -40°C to +85°C extended temperature range.
Features
o
1% Accurate Threshold Specified Over Full
Temperature Range
o
Dual-/Triple-/Quad, Low-Battery Output Options
o
Low 5.7µA Battery Current
o
Open-Drain or Push-Pull Outputs
o
Fixed or Adjustable Hysteresis
o
Low Input Bias Current
o
Guaranteed Valid Low-Battery-Output Logic State
Down to V
BATT
= 1.05V
o
Reverse-Battery Protection
o
Immune to Short Battery Transients
o
Fully Specified from -40°C to +85°C
o
Small TDFN and TQFN Packages
MAX6782–MAX6790
Ordering Information
PART
MAX6782TE_+
MAX6783TE_+
MAX6784TC_+
MAX6785TC_+
TEMP RANGE
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
PIN-PACKAGE
16 TQFN-EP*
16 TQFN-EP*
12 TQFN-EP*
12 TQFN-EP*
Applications
Battery-Powered Systems
(Single-Cell Li+ or
Multicell NiMH, NiCd,
Alkaline)
Cell Phones/Cordless
Phones
Pagers
Portable Medical Devices
PDAs
Electronic Toys
MP3 Players
Ordering Information continued at end of data sheet.
+Denotes
a lead(Pb)-free/RoHS-compliant package.
*EP
= Exposed pad.
The MAX6782/MAX6783/MAX6784/MAX6785 are available with
factory-trimmed hysteresis. Specify trim by replacing “_” with
“A” for 0.5%, “B” for 5%, or “C” for 10% hysteresis.
Pin Configuration and Typical Operating Circuit appear at
end of data sheet.
Selector Guide
PART
MAX6782TE_+
MAX6783TE_+
MAX6784TC_+
MAX6785TC_+
MAX6786TA+
MAX6787TA+
MAX6788TA+
MAX6789TB+
MAX6790TB+
MONITOR LEVEL
4
4
3
3
2
2
2
4
4
LBO
OUTPUT
Quad
Quad
Triple
Triple
Dual
Dual
Dual
—
—
OV
—
—
—
—
—
—
—
Single
Single
OV
—
—
—
—
—
—
—
Single
Single
OUTPUT TYPE
Push-Pull
Open Drain
Push-Pull
Open Drain
Push-Pull
Open Drain
Push-Pull/Open Drain
Push-Pull
Open Drain
HYSTERESIS
Fixed/Adj
Fixed/Adj
Fixed/Adj
Fixed/Adj
Adj
Adj
Adj
—
—
Note:
All devices are available in tape and reel in 2.5k increments. For tape and reel orders, add a “T” after the “+” to complete the part
number.
________________________________________________________________
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-Power, 1% Accurate, Dual-/Triple-/Quad-Level
Battery Monitors in Small TDFN and TQFN Packages
MAX6782–MAX6790
ABSOLUTE MAXIMUM RATINGS
(All voltages referenced to GND.)
BATT.........................................................................-0.3V to +6V
IN1–IN4, LBH1, LBL1,
LBH2, LBL2 ..................-0.3V to Min ((V
BATT
+ 0.3V) and +6V)
HADJ1–HADJ4, REF .......-0.3V to Min ((V
BATT
+ 0.3V) and +6V)
LBO1–LBO4
(push-pull) ..-0.3V to Min ((V
BATT
+ 0.3V) and +6V)
LBO1–LBO4
(open drain).........................................-0.3V to +6V
Input Current (all pins) ........................................................20mA
Output Current (all pins) .....................................................20mA
Continuous Power Dissipation (T
A
= +70°C)
8-Pin TDFN (derate 23.8mW/°C above +70°C) ..........1905mW
10-Pin TDFN (derate 24.4mW/°C above +70°C) ........1951mW
12-Pin Thin QFN (derate 16.7mW/°C above +70°C) ..1333mW
16-Pin Thin QFN (derate 20.8mW/°C above +70°C) ..1667mW
Operating Temperature Range ...........................-40°C to +85°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
BATT
= 1.6V to 5.5V, T
A
= -40°C to +85°C, unless otherwise specified. Typical values are at T
A
= +25°C.) (Note 1)
PARAMETER
Operating Voltage Range
(Note 2)
Supply Current
Startup Time (Note 3)
MAX6782/MAX6783/MAX6784/MAX6785
0.5% hysteresis (A version)
IN_ Falling Threshold (Note 4)
IN_ Rising Threshold (Note 4)
IN_, HADJ_ Input Leakage
Current
Reference Output
Reference Load Regulation
Reference Temperature
Coefficient
Reference Short-Circuit Current
Hysteresis Adjustment Range
Hysteresis Adjustment Logic Low
Hysteresis Adjustment Logic
High
MAX6786/MAX6787/MAX6788
LBL_, LBH_ Threshold
LBL_, LBH_ Input Leakage
Current
V
TH
V
LBL
, V
LBH_
≥
0.3V
0.6024
0.6085
0.6146
5
V
nA
V
HALL
V
HALH
0.17
0.4
TEMPCO
V
REF
I
REF
= 0 to 1mA
V
INF
V
INR
V
IN_,
V
HADJ_
≥
0.3V
0.6024
0.6085
0.3
15
20
V
REF
0.05
5% hysteresis (B version)
10% hysteresis (C version)
0.5994
0.5723
0.5422
0.6024
0.6055
0.5781
0.5477
0.6085
0.6115
0.5839
0.5531
0.6146
5
0.6146
V
nA
V
mV/mA
ppm/°C
mA
V
V
V
V
SYMBOL
V
BATT
I
Q
CONDITIONS
T
A
= 0°C to +70°C
T
A
= -40°C to +85°C
V
BATT
= 3.7V, no load
V
BATT
= 1.8V, no load
V
BATT
rising from 0 to 1.6V
MIN
1.05
1.2
6.3
5.7
5
TYP
MAX
5.5
5.5
10
UNITS
V
µA
µA
ms
2
_______________________________________________________________________________________
Low-Power, 1% Accurate, Dual-/Triple-/Quad-Level
Battery Monitors in Small TDFN and TQFN Packages
ELECTRICAL CHARACTERISTICS (continued)
(V
BATT
= 1.6V to 5.5V, T
A
= -40°C to +85°C, unless otherwise specified. Typical values are at T
A
= +25°C.) (Note 1)
PARAMETER
MAX6782–MAX6788
LBO_
Propagation Delay
LBO_
Output Low Voltage (Push-
Pull or Open Drain)
t
PD
V
OL
±100mV overdrive
V
BATT
≥
1.2V, I
SINK
= 100µA
V
BATT
≥
2.7V, I
SINK
= 1.2mA
V
BATT
≥
4.5V, I
SINK
= 3.2mA
V
BATT
≥
1.6V, I
SOURCE
= 10µA
LBO_
Output High Voltage
(Push-Pull) (Note 5)
V
OH
V
BATT
≥
2.7V, I
SOURCE
= 500µA
V
BATT
≥
4.5V, I
SOURCE
= 800µA
LBO_
Output Leakage Current
(Open Drain)
MAX6789/MAX6790
IN_ Rising Threshold
IN_ Hysteresis
IN_ Input Leakage Current
OV,
OV Delay Time
t
PD
V
IN_
≥
0.3V
±100mV overdrive
V
BATT
≥
1.6V, I
SINK
= 100µA, output
asserted
OV
Output Low Voltage (Push-
Pull or Open Drain)
V
OL
V
BATT
≥
2.7V, I
SINK
= 1.2mA, output
asserted
V
BATT
≥
4.5V, I
SINK
= 3.2mA, output
asserted
V
BATT
≥
1.2V, I
SOURCE
= 10µA, output not
asserted
OV
Output High Voltage (Push-
Pull) (Note 5)
V
OH
V
BATT
≥
2.7V, I
SOURCE
= 500µA, output not
asserted
V
BATT
≥
4.5V, I
SINK
= 800µA, output not
asserted
OV
Output Leakage Current
(Open Drain)
Output not asserted, V
OV
, V
OV
= 0 or 5V
V
BATT
≥
1.2V, I
SINK
= 100µA, output not
asserted
OV Output Low Voltage
(Push-Pull or Open Drain)
V
OL
V
BATT
≥
2.7V, I
SINK
= 1.2mA, output not
asserted
V
BATT
≥
4.5V, I
SINK
= 3.2mA, output not
asserted
0.8 x
V
BATT
0.8 x
V
BATT
0.8 x
V
BATT
500
0.3
0.3
0.4
V
nA
V
30
0.3
0.3
0.4
V
V
TH+
0.6024
0.6085
31
5
0.6146
V
mV
nA
µs
Output not asserted, V
LBO_
= 0 or 5V
0.8 x
V
BATT
0.8 x
V
BATT
0.8 x
V
BATT
500
30
0.3
0.3
0.4
µs
V
V
V
V
V
V
nA
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
MAX6782–MAX6790
3
_______________________________________________________________________________________
Low-Power, 1% Accurate, Dual-/Triple-/Quad-Level
Battery Monitors in Small TDFN and TQFN Packages
MAX6782–MAX6790
ELECTRICAL CHARACTERISTICS (continued)
(V
BATT
= 1.6V to 5.5V, T
A
= -40°C to +85°C, unless otherwise specified. Typical values are at T
A
= +25°C.) (Note 1)
PARAMETER
SYMBOL
CONDITIONS
V
BATT
≥
1.6V, I
SOURCE
= 10µA, output
asserted
OV Output High Voltage (Push-
Pull ) (Note 5)
V
OH
V
BATT
≥
2.7V, I
SOURCE
= 500µA, output
asserted
V
BATT
≥
4.5V, I
SOURCE
= 800µA, output
asserted
OV Output Leakage Current
(Open Drain)
CLEAR
Input Low Voltage
CLEAR
Input High Voltage
CLEAR
Pullup Resistance
CLEAR
Minimum Pulse Width
CLEAR
Delay Time
t
CLD
V
IL
V
IH
0.7 x
V
BATT
25
1
300
80
Output asserted, V
OV
= 0 or 5V
MIN
0.8 x
V
BATT
0.8 x
V
BATT
0.8 x
V
BATT
500
0.3 x
V
BATT
nA
V
V
kΩ
µs
ns
V
TYP
MAX
UNITS
Note 1:
Devices are tested at T
A
= +25°C and guaranteed by design for T
A
= T
MIN
to T
MAX
as specified.
Note 2:
Operating voltage range ensures low battery output is in the correct state. Minimum battery voltage for electrical specifica-
tion is 1.6V.
Note 3:
Reference and threshold accuracy is only guaranteed after the startup time. Startup time is guaranteed by design.
Note 4:
The rising threshold is guaranteed to be higher than the falling threshold.
Note 5:
The source current is the total source current from all outputs.
4
_______________________________________________________________________________________
Low-Power, 1% Accurate, Dual-/Triple-/Quad-Level
Battery Monitors in Small TDFN and TQFN Packages
Typical Operating Characteristics
(V
BATT
= 3.6V, T
A
= +25°C, unless otherwise noted.)
MAX6782–MAX6790
SUPPLY CURRENT
vs. TEMPERATURE
MAX6782 toc01
PROPAGATION DELAY
vs. TEMPERATURE
MAX6782 toc02
MAXIMUM TRANSIENT DURATION
vs. THRESHOLD OVERDRIVE
MAXIMUM TRANSIENT DURATION (µs)
900
800
700
600
500
400
300
200
100
0
1
10
100
1000
OUTPUT ASSERTED ABOVE THIS LINE
MAX6782 toc03
8.0
V
BATT
= 5V
7.5
SUPPLY CURRENT (µA)
7.0
6.5
6.0
5.5
5.0
4.5
4.0
-40
-15
10
35
60
V
BATT
= 1.8V
V
BATT
= 3.6V
70
V
IN_
=
±100mV
OVERDRIVE
60
PROPAGATION DELAY (µs)
50
40
30
20
10
0
1000
85
-40
-15
10
35
60
85
TEMPERATURE (°C)
TEMPERATURE (°C)
THRESHOLD OVERDRIVE (mV)
NORMALIZED THRESHOLD VOLTAGES
vs. TEMPERATURE (MAX6782TEA)
MAX6782 toc04
NORMALIZED THRESHOLD VOLTAGES
vs. TEMPERATURE (MAX6782TEB)
MAX6782 toc05
NORMALIZED THRESHOLD VOLTAGES
vs. TEMPERATURE (MAX6782TEC)
1.004
NORMALIZED THRESHOLD (V)
1.003
1.002
1.001
1.000
0.999
0.998
0.997
0.996
0.995
FALLING
RISING
NORMALIZED AT T
A
= +25°C
MAX6782 toc06
1.005
1.004
NORMALIZED THRESHOLD (V)
1.003
1.002
1.001
1.000
0.999
0.998
0.997
0.996
0.995
-40
-15
10
35
60
RISING
FALLING
NORMALIZED AT T
A
= +25°C
1.005
1.004
NORMALIZED THRESHOLD (V)
1.003
1.002
1.001
1.000
0.999
0.998
0.997
0.996
0.995
FALLING
RISING
NORMALIZED AT T
A
= +25°C
1.005
85
-40
-15
10
35
60
85
-40
-15
10
35
60
85
TEMPERATURE (°C)
TEMPERATURE (°C)
TEMPERATURE (°C)
_______________________________________________________________________________________
5
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