MAX44268 Maxim, MAX44268 Datasheet

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MAX44268

Manufacturer Part Number
MAX44268
Description
The MAX44268 is an ultra-small and low-power dual comparator ideal for battery-powered applications such as cell phones, notebooks, and portable medical devices that have extremely aggressive board space and power constraints
Manufacturer
Maxim
Datasheet
The MAX44268 is an ultra-small and low-power dual
comparator ideal for battery-powered applications such
as cell phones, notebooks, and portable medical devices
that have extremely aggressive board space and power
constraints. The comparator is available in a miniature
1.3mm x 1.3mm, 9-bump WLP package, making it the
industry’s smallest dual comparator.
The IC can be powered from supply rails as low as 1.8V
and up to 5.5V. It also features a 1.236V ±1% reference
and a 0.7µA typical supply current per comparator. It has
a rail-to-rail input structure and a unique output stage that
limits supply current surges while switching. This design
also minimizes overall power consumption under dynam-
ic conditions. The IC has open-drain outputs, making it
suitable for mixed voltage systems. The IC also features
internal filtering to provide high RF immunity. It operates
over a -40°C to +85°C temperature.
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.
Smartphones
Notebooks
Two-Cell Battery-Powered Devices
Battery-Operated Sensors
Ultra-Low-Power Systems
Portable Medical Mobile Accessories
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General Description
Applications
R3
R2
R1
V
IN
Dual Comparator with Reference
REF/INA-
INB+
INA+
INB-
1.3mm x 1.3mm, Low-Power
GND
MAX44268
5V
V
CC
S Ultra-Low Power Consumption
S Ultra-Small 1.3mm x 1.3mm WLP Package
S Internal 1.236V ±1% Reference
S Guaranteed Operation Down to V
S Input Common-Mode Voltage Range Extends
S 6V Tolerant Inputs Independent of Supply
S Open-Drain Outputs
S Internal Filters Enhance RF Immunity
S Crowbar-Current-Free Switching
S Internal Hysteresis for Clean Switching
S No Output Phase Reversal for Overdriven Inputs
Ordering Information
For related parts and recommended products to use with this part,
refer to www.maxim-ic.com/MAX44268.related.
 0.7µA per Comparator
200mV Beyond-the-Rails
OUTA
OUTB
Typical Application Circuit
POWER-
GOOD
E V A L U A T I O N K I T A V A I L A B L E
appears at end of data sheet.
MAX44268
CC
19-6144; Rev 0; 12/11
= 1.8V
Features

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MAX44268 Summary of contents

Page 1

... General Description The MAX44268 is an ultra-small and low-power dual comparator ideal for battery-powered applications such as cell phones, notebooks, and portable medical devices that have extremely aggressive board space and power constraints. The comparator is available in a miniature 1.3mm x 1.3mm, 9-bump WLP package, making it the industry’ ...

Page 2

... P T SINK 5V SINK 6mA -40NC P T Inferred from V test OS V Sinking OUT 5.5V 5.5V CC OUT MAX44268 , T = -40NC to +85NC. Typical values are MIN TYP + 0.2V) (Note +25NC 0. +85NC A 0.15 0.2 105 = +25NC A P +85NC A = +25NC 285 A P +85NC A ...

Page 3

... T = +25NC 10Hz to 1kHz 1nF REF N 10Hz to 6kHz 1nF REF /δ 1. /δI 0 < I < 100nA OUT OUT = +25NC. Temperature limits are guaranteed by design. A MAX44268 , T = -40NC to +85NC. Typical values are MIN TYP = 1. 1.8V 1. ...

Page 4

... INPUT BIAS CURRENT vs. TEMPERATURE 0.20 0.18 0. 0.14 0.12 0. 2. 1.8V DD 0.06 0.04 0.02 0 100 -40 - TEMPERATURE (°C) 10k 100k MAX44268 SUPPLY CURRENT vs. TRANSITION FREQUENCY (V OVERDRIVE 5.0 5.5 6 100 INPUT FREQUENCY (Hz) INPUT BIAS CURRENT vs. COMMON-MODE VOLTAGE 500 450 400 350 300 V 250 ...

Page 5

... TEMPERATURE (°C) t PHL 600 800 1000 ) PLH T = +25° +85°C A 600 800 1000 MAX44268 PROPAGATION DELAY vs. PULLUP RESISTANCE 120 100 1. 110 1k 10k 100k PULLUP RESISTANCE (I) PROPAGATION DELAY vs. TEMPERATURE (V = 100mV 5V) OVERDRIVE ...

Page 6

... MAX44268 = -40NC to +85NC. Typical values are at T LARGE-SIGNAL TRANSIENT RESPONSE (V MAX44268 toc17 100mV/div 1V/div LARGE-SIGNAL TRANSIENT RESPONSE (V = 5V) CC 200mV/div 2V/div 20µs /div NO OUTPUT PHASE REVERSAL V IN -0.3V TO +6V V OUT 20µs /div = +25NC, unless A = 1.8V) CC MAX44268 toc18 20µs /div MAX44268 toc20 MAX44268 toc22 ...

Page 7

... OUTPUT SOURCE CURRENT (nA) 4.0 4.5 5.0 5 1.8V CC 120 140 160 180 200 MAX44268 = -40NC to +85NC. Typical values are at T REF VOLTAGE vs. REF SINK CURRENT AND TEMPERATURE 1.280 1.275 1.270 1.265 1.260 1.255 1.250 1.245 1.240 1.235 1.230 160 180 ...

Page 8

... Maxim Integrated Products 8 1.3mm x 1.3mm, Low-Power Dual Comparator with Reference TOP VIEW MAX44268 REF/ A INA+ OUTA INA GND N. INB- INB+ OUTB WLP FUNCTION MAX44268 Bump Configuration Bump Description ...

Page 9

... Detailed Description The MAX44268 is a general-purpose dual comparator for battery-powered devices where area, power, and cost constraints are crucial. The IC can operate with a low 1.8V supply rail typically consuming 0.7µA quiescent cur- rent per comparator. This makes it ideal for mobile and very low-power applications. The IC’s common-mode input voltage range extends 200mV beyond-the-rails ...

Page 10

... Figure 2 can be simplified if the = 2.525V and V = 2.475V then using the above THF Logic-Level Translator Figure 2 and Figure MAX44268 REF GND  1    +     R4      ...

Page 11

... R2(R1R3 R3R5 R1R5)   V T_FALL = R5C1 ln  t LOW  V  T_RISE would have involved HIGH ) and thevenin resistance THEVENIN MAX44268 R2 OUT R4 GND R5 C1   +  +     +   +      ...

Page 12

... V T_FALL CC  4) Calculate R3: For this example, choose a 1.58MI standard value 1% resistor. MAX44268 Window Detector Circuit Typical Application Circuit 15nA, so the current through R1 should exceed 1.5µA for the thresholds to be accurate. In this example, choose R1 = 825kI (1.236V/1.5µA). be 4.2V when V is rising. The design equation is as ...

Page 13

... GND. To maxi- CC pin and reducing trace Jack Detect ACCESSORY output of Figure 8. Jack Detector Circuit MAX44268EWL+T +Denotes a lead(Pb)-free/RoHS-compliant package Tape and reel. MAX44268 REF MAX44268 V CC 200kI CONNECTOR ID Ordering Information PART TEMP RANGE PACKAGE -40NC to +85NC 9 WLP V PULL OUT2 GND ...

Page 14

... Maxim Integrated Products 14 1.3mm x 1.3mm, Low-Power Dual Comparator with Reference PACKAGE CODE OUTLINE NO. W91B1-6 MAX44268 Package Information LAND PATTERN NO. 21-0430 Refer to Application Note 1891 ...

Page 15

... Characteristics table are guaranteed. Other parametric values quoted in this data sheet are provided for guidance. Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 2011 Maxim Integrated Products © 1.3mm x 1.3mm, Low-Power Dual Comparator with Reference DESCRIPTION Maxim is a registered trademark of Maxim Integrated Products, Inc. MAX44268 Revision History PAGES CHANGED — 15 ...

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