Ultra-Small, nanopower, Window Comparator in 4 UCSP and 5 SOT23

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1 EVALUATION KIT AVAILABLE MAX965 General Description The MAX965 is an ultra-small, low-power, window comparator ideal for a wide variety of portable electronics applications such as cell phones, portable media players, 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 42 resistors) and a 5-pin SOT23 package. The MAX965 features a common-mode input range of -.3V to +5.5V independent of supply voltage. The input current goes to zero when the MAX965 is powered down ( = ). Additionally, the MAX965 features high RF immunity. The MAX965 has a push-pull output and consumes only 1μA (max) supply current. The MAX965 operates down to 1. over the extended -4 C to +85 C temperature range. Applications Cell Phones Portable Media Players Electronic Toys Notebook Computers Portable Medical Devices Pin Configurations Features Tiny 1mm x 1mm 4-Bump UCSP Footprint = Two 42 Resistors Also Available in 5-Pin SOT23 Package Ultra-Low Power Operating Current 1μA (max) -.3V to +5.5V Input Voltage Range 1. to 5.5V Range 3. and 4.2V Trigger Points -4 C to +85 C Extended Temperature Range Ordering Information PART P-PACKAGE TOP MARK MAX965EBS+G45 4 UCSP AGC MAX965EUK+ 5 SOT23 AFFL MAX965AEWS+TCNB 4 WLP AGO Note: All devices are specified over the extended -4 C to +85 C operating temperature range. +Denotes a lead-free/rohs-compliant package. G45 = Protective die coating. Typical Operating Circuit 1. TO 5.5V.1µF TOP VIEW (BUMPS ON BOTTOM) TOP VIEW MAX965 + MAX V LOWER A1 B1 A2 B2 GND GND GND MAX V UPPER.2V REF + I/O V DD MICRO CONTROLLER UCSP SOT23 N GND UCSP is a trademark of Maxim Integrated Products, Inc ; Rev 4; 3/17

2 Absolute Maximum Ratings, to GND...-.3V to +6V to GND V to ( +.3V) Output Short-Circuit Current Duration... 1s Input Current into Any Terminal...±2mA Continuous Power Dissipation 4-Bump UCSP (derate 3.mW/ C above +7 C)...238mW 5-Pin SOT23 (derate 3.9mW/ C above +7 C)...312mW 4-Bump WLP (derate 3mW/ºC above +7ºC)...915mW Operating Temperature Range C to +85 C Junction Temperature C Storage Temperature Range C to +15 C Lead Temperature (SOT23 only, soldering 1s)...+3 C Soldering Temperature (reflow) 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 (, T A = -4 C to +85 C. Typical values are at T A = +25 C, unless otherwise noted.) (Note 1) PARAMETER SYMBOL CONDITIONS M TYP MAX UNITS DC CHARACTERISTICS MAX965EBS+ T A = +25 C UCSP -4 C < T A < +85 C Upper Threshold Voltage UTV MAX965EUK+ T A = +25 C SOT23-4 C < T A < +85 C V MAX965AEBS+ T A = +25 C UCSP -4 C < T A < +85 C MAX965EBS+ T A = +25 C UCSP -4 C < T A < +85 C Lower Threshold Voltage LTV MAX965EUK+ T A = +25 C SOT23-4 C < T A < +85 C V MAX965AEBS+ T A = +25 C UCSP -4 C < T A < +85 C Input Voltage Range V V Hysteresis V HYS (Note 2) ±1. % Resistor String Input Resistance R MΩ Input Shutdown Current I _SHDN =, V = 5.5V 1 15 na Output Voltage Low V OL I SK = 1.2mA,.3 V I SK = 1µA, = 1V, T A = +25 C.2 I SK = 1.2mA, = 5.5V.5 Output Voltage High V OH I SOURCE =.3mA, -.3 V I SOURCE = 25µA, = 1V, T A = +25 C -.2 I SOURCE =.75mA, = 5.5V -.5 AC CHARACTERISTICS Propagation Delay t PD Overdrive = ±1mV (Notes 3, 4) 25 µs Fall Time t F C L = 1pF 14 ns Rise Time t R C L = 1pF 3 ns Maxim Integrated 2

3 Electrical Characteristics (continued) (, T A = -4 C to +85 C. Typical values are at T A = +25 C, unless otherwise noted.) (Note 1) PARAMETER SYMBOL CONDITIONS M TYP MAX UNITS POWER SUPPLY Supply Voltage Guaranteed by V OS tests V = 5.5V Supply Current I CC = 1., T A = +25 C.6 1. µa Power-Supply Rejection Ratio PSRR =.9V to 5.5V, T A = +25 C 4 53 db Power-Up Time t ON 3 ms Note 1: All devices are 1% production tested at T A = +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. Typical Operating Characteristics (, T A = -4 C to +85 C. Typical values are at T A = +25 C, unless otherwise noted.) SUPPLY CURRENT (na) SUPPLY CURRENT vs. SUPPLY VOLTAGE T A = +85 C T A = -4 C T A = +25 C MAX965 toc1 SUPPLY CURRENT (µa) SUPPLY CURRENT vs. PUT TRANSITION FREQUENCY = 1.8V = 5V MAX965 toc2 PUT VOLTAGE LOW (V) PUT VOLTAGE LOW vs. SK CURRENT = 1.8V = 5V MAX965 toc SUPPLY VOLTAGE (V) PUT TRANSITION FREQUENCY (khz) SK CURRENT (ma) PUT VOLTAGE HIGH (V) PUT VOLTAGE HIGH vs. SOURCE CURRENT = 1.8V = 5V MAX965 toc4 HYSTERESIS (mv) HYSTERESIS VOLTAGE vs. TEMPERATURE V TH = 4.2V V TH = 3V MAX965 toc5 THRESHOLD VOLTAGE (V) THRESHOLD VOLTAGE vs. TEMPERATURE V TH = 4.2V V TH = 3V MAX965 toc SOURCE CURRENT (ma) TEMPERATURE ( C) TEMPERATURE ( C) Maxim Integrated 3

4 Typical Operating Characteristics (continued) (, T A = -4 C to +85 C. Typical values are at T A = +25 C, unless otherwise noted.) THRESHOLD VOLTAGE (V) THRESHOLD VOLTAGE vs. SUPPLY VOLTAGE V TH = 4.2V V TH = 3V MAX965 toc7 PROPAGATION DELAY (µs) PROPAGATION DELAY vs. TEMPERATURE = 5V = 1.8V MAX965 toc8 PROPAGATION DELAY (µs) PROPAGATION DELAY vs. PUT OVERDRIVE = 1.8V V TH = 4.2V = 5V MAX965 toc SUPPLY VOLTAGE (V) TEMPERATURE ( C) PUT OVERDRIVE (mv) PROPAGATION DELAY (ms) PROPAGATION DELAY vs. SUPPLY VOLTAGE V TH = 4.2V V TH = 3V MAX965 toc1 4.4V 4V 1kHz FREQUENCY RESPONSE MAX965 toc11 2mV/div 4.4V 4V 1kHz FREQUENCY RESPONSE MAX965 toc12 2mV/div SUPPLY VOLTAGE (V) V OD = ±2mV 2µs/div 2µs/div 3.2V 3V PUT RESPONSE TO SUPPLY VOLTAGE TRANSIENT V = V TH + 5mV V = V TH + 15mV V = V TH + 3mV 1ms/div MAX965 toc13 2mV/div POWER-UP/POWER-DOWN RESPONSE 1ms/div MAX965 toc14 V = 4.3V TRIP POT (V) POWER-SUPPLY REJECTION FOR NO FALSE TRIGGERG UPPER TRIP POT LOWER TRIP POT + 1mV P-P 1 1 1k 1k 1k 1M FREQUENCY (Hz) MAX965 toc15 Maxim Integrated 4

5 Pin Description Table 1. MAX965 Operation SOT23 P UCSP NAME FUNCTION 1 B1 Bypass to ground with a External Supply Input..1µF bypass capacitor. 2, 3 B2 GND Ground 4 A2 Window Comparator Input 5 A1 Push-Pull Output Detailed Description The MAX965 is an extremely small window comparator designed for compact, low-current applications, featuring a supply current of less than 1μA (max). MAX965 Operation At the heart of the MAX965 are two comparators, a resistor-divider with a disconnect switch, a 2mV reference, 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 outputs of the two comparators. When either comparator s output is low, the output asserts low. When both comparator s outputs are high, the output asserts high. When power is applied to, the n-channel FET at the bottom of the resistor-divider is turned on. The resistordivider provides two voltages, V UPPER and V LOWER, for comparison with an internal.2v reference voltage. When the input voltage exceeds 4.2V, V UPPER is greater than.2v, causing the output to assert low. When the input voltage falls below 3., V LOWER is less than.2v, causing the output also to assert low. With the input voltage between 3. and 4.2V, the output asserts high, indicating that the input voltage is within the desired range. Table 1 summarizes the operation of the MAX965. When goes to, the n-channel FET is turned off, eliminating the resistor-divider as a leakage path for current. PUT VOLTAGE V > 4.2V Table 2. MAX965A Operation PUT Low 3. < V < 4.2V High V < 3. PUT VOLTAGE V > 1.2V Low PUT Low.6V < V < 1.2V High V <.6V Low MAX965A Operation The resistor-divider provides two voltages, V UPPER and V LOWER, for comparison with an internal.2v reference voltage. When the input voltage exceeds 1.2V, V UPPER is greater than.2v, causing the output to assert low. When the input voltage falls below.6v, V LOWER is less than.2v, causing the output also to assert low. With the input voltage between.6v and 1.2V, the output asserts high, indicating that the input voltage is within the desired range. Table 2 summarizes the operation of the MAX965A. Applications The MAX965 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. 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 with a.1μf capacitor to ground. Chip Information PROCESS: BiCMOS Maxim Integrated 5

6 UTV = 4.2V (MAX965) UTV = 1.2V (MAX965A) HYSTERESIS = 1% HYSTERESIS = 1% LTV = 3. (MAX965) LTV =.6V (MAX965A) Figure 1. Hysteresis Trip Points Maxim Integrated 6

7 Package Information For the latest package outline information and land patterns (footprints), go to Note that a +, #, or - in the package code indicates RoHS status only. Package drawings may show a different suffix character, but the drawing pertains to the package regardless of RoHS status. PACKAGE TYPE PACKAGE CODE LE NO. LAND PATTERN NO. 5 SOT23 U UCSP B Refer to Application Note WLP W41E Maxim Integrated 7

8 Package Information (continued) For the latest package outline information and land patterns (footprints), go to Note that a +, #, or - in the package code indicates RoHS status only. Package drawings may show a different suffix character, but the drawing pertains to the package regardless of RoHS status. Pin 1 Indicator A 1 E AAAA Marking D SEE NOTE 7 COMMON DIMENSIONS A A A2 A3 b.4 REF.4 BASIC.31.3 D TOP VIEW SIDE VIEW E D1 E BASIC.5 BASIC A3 e.5 BASIC A A2 A1 S.5 S SD.25 BASIC SE.25 BASIC DEPOPULATED BUMPS: NONE FRONT VIEW B B A E1/ e SE SD D1 NOTES: 1. Terminal pitch is defined by terminal center to center value. 2. Outer dimension is defined by center lines between scribe lines. 3. All dimensions in millimeter. 4. Marking shown is for package orientation reference only. 5. Tolerance is ±.2 unless specified otherwise. 6. All dimensions apply to PbFree (+) package codes only. 7. Front - side finish can be either Black or Clear. maxim integrated TM 1 2 b A.5 M S AB TITLE PACKAGE LE 4 BUMPS BOTTOM VIEW WLP PKG..5mm PITCH, W41E1+1 APPROVAL DOCUMENT CONTROL NO. REV. - DRAWG NOT TO SCALE C Maxim Integrated 8

9 Package Information (continued) For the latest package outline information and land patterns (footprints), go to Note that a +, #, or - in the package code indicates RoHS status only. Package drawings may show a different suffix character, but the drawing pertains to the package regardless of RoHS status. Maxim Integrated 9

10 Revision History REVISION NUMBER REVISION DATE DESCRIPTION PAGES CHANGED 7/8 Initial release 1 1/8 Removed future part reference from 5 SOT23 package 1 2 1/11 Added G45 designation 1 3 8/15 Corrected error in Typical Operating Circuit 1 4 3/17 Updated title to include nanopower and updated package outline drawings 1 1 For pricing, delivery, and ordering information, please contact Maxim Direct at , or visit Maxim Integrated s website at Maxim Integrated cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim Integrated product. No circuit patent licenses are implied. Maxim Integrated reserves the right to change the circuitry and specifications without notice at any time. The parametric values (min and max limits) shown in the Electrical Characteristics table are guaranteed. Other parametric values quoted in this data sheet are provided for guidance. Maxim Integrated and the Maxim Integrated logo are trademarks of Maxim Integrated Products, Inc. 217 Maxim Integrated Products, Inc. 1