General Description
The MAX9065 is an ultra-small, low-power, window com-
parator ideal for a wide variety of portable electronics
applications such as cell phones, portable media play-
ers, and notebooks that have extremely tight board
space and power constraints. It comes in both a 4-bump
UCSP™ package with a 1mm x 1mm footprint (as small
as two 0402 resistors) and a 5-pin SOT23 package.
The MAX9065 features a common-mode input range of
-0.3V to +5.5V independent of supply voltage. The
input current goes to zero when the MAX9065 is pow-
ered down (VCC = 0). Additionally, the MAX9065 fea-
tures high RF immunity.
The MAX9065 has a push-pull output and consumes
only 1µA (max) supply current. The MAX9065 operates
down to 1.0V over the extended -40°C to +85°C tem-
perature range.
Applications
Cell Phones
Portable Media Players
Electronic Toys
Notebook Computers
Portable Medical Devices
Features
♦Tiny 1mm x 1mm 4-Bump UCSP
Footprint = Two 0402 Resistors
Also Available in 5-Pin SOT23 Package
♦Ultra-Low Power Operating Current
1µA (max)
♦-0.3V to +5.5V Input Voltage Range
♦1.0V to 5.5V VCC Range
♦3.0V and 4.2V Trigger Points
♦-40°C to +85°C Extended Temperature Range
MAX9065
Ultra-Small, Low-Power, Window Comparator
in 4 UCSP and 5 SOT23
________________________________________________________________
Maxim Integrated Products
1
19-4224; Rev 1; 10/08
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.
EVALUATION KIT
AVAILABLE
GND
INGND
1 5 OUTVCC
MAX9065
SOT23
TOP VIEW
2
34
OUT
VCC
UCSP
TOP VIEW
(BUMPS ON BOTTOM)
A1 A2
B1 B2
IN
GND
MAX9065 +
Pin Configurations
IN
1.0V TO 5.5V
MICRO
CONTROLLER
N
VCC
VLOWER
VUPPER
OUT
VCC
GND
0.1μF
I/O
VDD
MAX9065
0.2V
REF
Typical Operating Circuit
Ordering Information
PART PIN-PACKAGE TOP MARK
MAX9065EBS+ 4 UCSP AGC
MAX9065EUK+ 5 SOT23 AFFL
Note: All devices are specified over the extended -40°C to
+85°C operating temperature range.
+
Denotes a lead-free/RoHS-compliant package.
UCSP is a trademark of Maxim Integrated Products, Inc.
MAX9065
Ultra-Small, Low-Power, Window Comparator
in 4 UCSP and 5 SOT23
2 _______________________________________________________________________________________
ELECTRICAL CHARACTERISTICS
(VCC = 3.3V, TA= -40°C to +85°C. Typical values are at TA= +25°C, unless otherwise noted.) (Note 1)
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.
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
DC CHARACTERISTICS
TA = +25°C 4.158 4.20 4.242
MAX9065EBS+
4 UCSP -40°C < TA < +85°C 4.10 4.30
TA = +25°C 4.04 4.20 4.36
Upper Threshold Voltage UTV
MAX9065EUK+
5 SOT23 -40°C < TA < +85°C 3.98 4.42
V
TA = +25°C 2.94 3.00 3.06
MAX9065EBS+
4 UCSP -40°C < TA < +85°C 2.92 3.08
TA = +25°C 2.88 3.00 3.12
Lower Threshold Voltage LTV
MAX9065EUK+
5 SOT23 -40°C < TA < +85°C 2.83 3.17
V
Input Voltage Range VIN -0.3 +5.5 V
Hysteresis VHYS (Note 2) ±1.0 %
Resistor String Input Resistance RIN 5.8 11 17.7 MΩ
Input Shutdown Current IIN_SHDN VCC = 0, VIN = 5.5V 1 15 nA
ISINK = 100µA, VCC = 1V, TA = +25°C 0.2
ISINK = 1.2mA, VCC = 3.3V 0.3
Output Voltage Low VOL
ISINK = 1.2mA, VCC = 5.5V 0.5
V
ISOURCE = 25µA, VCC = 1V, TA = +25°C VCC -
0.2
ISOURCE = 0.3mA, VCC = 3.3V VCC -
0.3
Output Voltage High VOH
ISOURCE = 0.75mA, VCC = 5.5V VCC -
0.5
V
AC CHARACTERISTICS
Propagation Delay tPD Overdrive = ±100mV (Notes 3, 4) 25 µs
Fall Time tFCL = 10pF 14 ns
Rise Time tRCL = 10pF 30 ns
POWER SUPPLY
Supply Voltage VCC Guaranteed by VOS tests 1 5.5 V
ABSOLUTE MAXIMUM RATINGS
VCC, IN to GND..........................................…………-0.3V to +6V
OUT to GND.................................…………-0.3V to (VCC + 0.3V)
Output Short-Circuit Current Duration ....................................10s
Input Current into Any Terminal .......................................±20mA
Continuous Power Dissipation
4-Bump UCSP (derate 3.0mW/°C above +70°C)..........238mW
5-Pin SOT23 (derate 3.9mW/°C above +70°C).............312mW
Operating Temperature Range ..........................-40°C to +85°C
Junction Temperature .....................................................+150°C
Storage Temperature Range ............................-65°C to +150°C
Bump Temperature (soldering) Reflow............................+235°C
Lead Temperature (soldering, 10s) .................................+300°C
MAX9065
Ultra-Small, Low-Power, Window Comparator
in 4 UCSP and 5 SOT23
_______________________________________________________________________________________
3
0
400
200
800
600
1000
1200
0231 456
SUPPLY CURRENT
vs. SUPPLY VOLTAGE
MAX9065 toc01
SUPPLY VOLTAGE (V)
SUPPLY CURRENT (nA)
TA = +85°C
TA = +25°C
TA = -40°C
SUPPLY CURRENT
vs. OUTPUT TRANSITION FREQUENCY
MAX9065 toc02
OUTPUT TRANSITION FREQUENCY (kHz)
SUPPLY CURRENT (μA)
101
5
10
15
20
25
30
35
40
45
50
0
0.1 100
VCC = 5V
VCC = 3.3V
VCC = 1.8V
0
1.0
0.5
2.0
1.5
2.5
3.0
084121620
OUTPUT VOLTAGE LOW
vs. SINK CURRENT
MAX9065 toc03
SINK CURRENT (mA)
OUTPUT VOLTAGE LOW (V)
VCC = 5V
VCC = 3.3V
VCC = 1.8V
0
1.0
0.5
2.0
1.5
2.5
3.0
04268
OUTPUT VOLTAGE HIGH
vs. SOURCE CURRENT
MAX9065 toc04
SOURCE CURRENT (mA)
OUTPUT VOLTAGE HIGH (V)
VCC = 5V
VCC = 3.3V
VCC = 1.8V
0
30
20
10
40
50
60
70
80
90
100
-40 10-15 35 60 85
HYSTERESIS VOLTAGE
vs. TEMPERATURE
MAX9065 toc05
TEMPERATURE (°C)
HYSTERESIS (mV)
VTH = 4.2V
VTH = 3V
2.8
3.0
3.2
3.4
3.6
3.8
4.0
4.2
4.4
-40 -15 10 35 60 85
THRESHOLD VOLTAGE
vs. TEMPERATURE
MAX9065 toc06
TEMPERATURE (°C)
THRESHOLD VOLTAGE (V)
VTH = 4.2V
VTH = 3V
Typical Operating Characteristics
(VCC = 3.3V, TA= -40°C to +85°C. Typical values are at TA= +25°C, unless otherwise noted.)
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
VCC = 5.5V 0.7 1.35
Supply Current ICC VCC = 1.0V, TA = +25°C 0.6 1.0 µA
Power-Supply Rejection Ratio PSRR VCC = 0.9V to 5.5V, TA = +25°C 40 53 dB
Power-Up Time tON 3ms
ELECTRICAL CHARACTERISTICS (continued)
(VCC = 3.3V, TA= -40°C to +85°C. Typical values are at TA= +25°C, unless otherwise noted.) (Note 1)
Note 1: All devices are 100% production tested at TA= +25°C. Temperature limits are guaranteed by design.
Note 2: Hysteresis is the input voltage difference between the two switching points.
Note 3: Overdrive is defined as the voltage above or below the average of the switching points.
Note 4: Guaranteed by ATE and/or bench characterization over temperature.
MAX9065
Ultra-Small, Low-Power, Window Comparator
in 4 UCSP and 5 SOT23
4 _______________________________________________________________________________________
Typical Operating Characteristics (continued)
(VCC = 3.3V, TA= -40°C to +85°C. Typical values are at TA= +25°C, unless otherwise noted.)
0
5
15
10
20
25
021 3456
PROPAGATION DELAY
vs. SUPPLY VOLTAGE
MAX9065 toc10
SUPPLY VOLTAGE (V)
PROPAGATION DELAY (ms)
VTH = 4.2V
VTH = 3V
VOD = ±200mV
200μs/div
1kHz FREQUENCY RESPONSE
IN
200mV/div
OUT
2V/div
MAX9065 toc11
VCC = 3.3V
4.4V
4V
0V
20μs/div
10kHz FREQUENCY RESPONSE
IN
200mV/div
OUT
2V/div
MAX9065 toc12
VCC = 3.3V
4.4V
4V
0V
1ms/div
OUTPUT RESPONSE TO SUPPLY
VOLTAGE TRANSIENT
VCC
200mV/div
OUT
2V/div
OUT
2V/div
OUT
2V/div
MAX9065 toc13
VIN = VTH + 50mV
VIN = VTH + 150mV
VIN = VTH + 300mV
3.2V
3V
0V
0V
0V
1ms/div
POWER-UP/POWER-DOWN RESPONSE
VCC
2V/div
OUT
2V/div
MAX9065 toc14
VIN = 4.3V
VCC = 3.3V
0V
0V
2.4
2.8
2.6
3.2
3.0
3.6
3.4
3.8
4.2
4.0
4.4
1.0 2.0 2.5 3.01.5 3.5 4.0 4.5 5.55.0 6.0
THRESHOLD VOLTAGE
vs. SUPPLY VOLTAGE
MAX9065 toc07
SUPPLY VOLTAGE (V)
THRESHOLD VOLTAGE (V)
VTH = 4.2V
VTH = 3V
7
11
9
17
15
13
23
21
19
25
-40 10-15 35 60 85
PROPAGATION DELAY
vs. TEMPERATURE
MAX9065 toc08
TEMPERATURE (°C)
PROPAGATION DELAY (μs)
VCC = 5V
VCC = 3.3V
VCC = 1.8V
0
50
100
150
200
250
0 80 10040 6020 120 140 160 180 200
PROPAGATION DELAY
vs. INPUT OVERDRIVE
MAX9065 toc09
INPUT OVERDRIVE (mV)
PROPAGATION DELAY (μs)
VCC = 1.8V
VCC = 3.3V
VCC = 5V
VTH = 4.2V
Detailed Description
The MAX9065 is an extremely small window compara-
tor designed for compact, low-current applications, fea-
turing a supply current of less than 1µA (max).
Operation
At the heart of the MAX9065 are two comparators, a
resistor-divider with a disconnect switch, a 200mV ref-
erence, digital logic circuitry, and an output stage (see
the
Typical Operating Circuit
).
The digital logic circuitry and the output stage together
behave like an AND gate. The gate’s inputs are the out-
puts of the two comparators. When either comparator’s
output is low, the output asserts low. When both com-
parator’s outputs are high, the output asserts high.
When power is applied to VCC, the n-channel FET at
the bottom of the resistor-divider is turned on. The
resistor-divider provides two voltages, VUPPER and
VLOWER, for comparison with an internal 0.2V reference
voltage. When the input voltage exceeds 4.2V, VUPPER
is greater than 0.2V, causing the output to assert low.
When the input voltage falls below 3.0V, VLOWER is less
than 0.2V, causing the output also to assert low. With
the input voltage between 3.0V and 4.2V, the output
asserts high, indicating that the input voltage is within
the desired range. Table 1 summarizes the operation of
the MAX9065.
When VCC goes to 0V, the n-channel FET is turned off,
eliminating the resistor-divider as a leakage path for
current.
Applications
The MAX9065 is designed specifically to monitor the
voltage on a single lithium battery. Keeping the voltage
on a lithium battery within a tight range is important to
prevent damage to the battery. Specifically, ensuring
that the battery’s voltage neither exceeds 4.2V nor falls
below 3.0V lengthens the lifetime of the battery and
avoids any hazardous battery conditions.
Hysteresis
There are four trip points for hysteresis. See Figure 1.
Power-Supply Considerations
Bypass VCC with a 0.1µF capacitor to ground.
Chip Information
PROCESS: BiCMOS
MAX9065
Ultra-Small, Low-Power, Window Comparator
in 4 UCSP and 5 SOT23
_______________________________________________________________________________________ 5
Pin Description
PIN
SOT23 UCSP NAME FUNCTION
1B1V
CC
External Supply Input. Bypass
to ground with a 0.1µF bypass
capacitor.
2, 3 B2 GND Ground
4 A2 IN Window Comparator Input
5 A1 OUT Push-Pull Output
INPUT VOLTAGE OUTPUT
VIN > 4.2V Low
3.0V < VIN < 4.2V High
VIN < 3.0V Low
Table 1. MAX9065 Operation
MAX9065
Ultra-Small, Low-Power, Window Comparator
in 4 UCSP and 5 SOT23
6 _______________________________________________________________________________________
HYSTERESIS = 1%
UTV = 4.2V
HYSTERESIS = 1%
LTV = 3.0V
IN
OUT
Figure 1. Hysteresis Trip Points
MAX9065
Ultra-Small, Low-Power, Window Comparator
in 4 UCSP and 5 SOT23
_______________________________________________________________________________________ 7
4L, UCSP 2x2.EPS
G11
21-0117
PACKAGE OUTLINE, 2x2 UCSP
Package Information
For the latest package outline information and land patterns, go to www.maxim-ic.com/packages.
PACKAGE TYPE PACKAGE CODE DOCUMENT NO.
4 UCSP B4-1 21-0117
5 SOT23 U5-2 21-0057
MAX9065
Ultra-Small, Low-Power, Window Comparator
in 4 UCSP and 5 SOT23
8 _______________________________________________________________________________________
SOT-23 5L .EPS
Package Information (continued)
For the latest package outline information and land patterns, go to www.maxim-ic.com/packages.
MAX9065
Ultra-Small, Low-Power, Window Comparator
in 4 UCSP and 5 SOT23
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 _____________________
9
© 2008 Maxim Integrated Products is a registered trademark of Maxim Integrated Products, Inc.
Revision History
REVISION
NUMBER
REVISION
DATE DESCRIPTION PAGES
CHANGED
0 7/08 Initial release —
1 10/08 Removed future part reference from 5 SOT23 package 1