MAXIM MAX44268 Technical data

EVALUATION KIT AVAILABLE

19-6144; Rev 0; 12/11

MAX44268

1.3mm x 1.3mm, Low-Power

Dual Comparator with Reference

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’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 dynamic 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.

Applications

Smartphones Notebooks Two-Cell Battery-Powered Devices Battery-Operated Sensors Ultra-Low-Power Systems Portable Medical Mobile Accessories

Features

S Ultra-Low Power Consumption

 0.7µA per Comparator

S Ultra-Small 1.3mm x 1.3mm WLP Package

S Internal 1.236V ±1% Reference

S Guaranteed Operation Down to VCC = 1.8V

S Input Common-Mode Voltage Range Extends

200mV Beyond-the-Rails

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 appears at end of data sheet.

For related parts and recommended products to use with this part, refer to www.maxim-ic.com/MAX44268.related.

Typical Application Circuit

5V

V

IN

R3

INA+

REF/INA-

R2

INB+

INB-

R1

�� Maxim Integrated Products 1

MAX44268

GND

V

CC

OUTA

OUTB

POWERGOOD

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.

MAX44268

1.3mm x 1.3mm, Low-Power

Dual Comparator with Reference

ABSOLUTE MAXIMUM RATINGS

VCC to GND ............................................................. -0.3V to +6V

INA+, REF/INA-, INB+, INB- to GND ......................-0.3V to +6V

Output Voltage to GND (OUT_) ..............................-0.3V to +6V

Output Current (OUT_) .................................................... Q50mA

Output Short-Circuit Duration (OUT_) .......................Continuous

Continuous Power Dissipation (TA = +70NC)

WLP (derate 11.9mW/NC above TA = +70NC) .............952mW

PACKAGE THERMAL CHARACTERISTICS (Note 1)

WLP

Junction-to-Ambient Thermal Resistance (qJA) ..........84°C/W

Note 1: Package thermal resistances were obtained using the method described in JEDEC specification JESD51-7, using a four-

layer board. For detailed information on package thermal considerations, refer to www.maxim-ic.com/thermal-tutorial.

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.

Continuous Input Current into Any Pin ............................ Q20mA

Operating Temperature Range .......................... -40NC to +85NC

Storage Temperature Range ............................ -65NC to +150NC

Junction Temperature .....................................................+150NC

Lead Temperature (soldering, 10s) ................................+300NC

Soldering Temperature (reflow) ......................................+260NC

ELECTRICAL CHARACTERISTICS

(VCC = 5V, V unless otherwise noted.) (Note 2)

PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS

DC CHARACTERISTICS

Input-Referred Hysteresis V

Input Offset Voltage V

Input Bias Current I

Output-Voltage Swing Low

Input Voltage Range V

Output Short-Circuit Current

Output Leakage Current I

GND

= 0V, V

IN-

= V

= 1.236V, R

IN+

HYS

OS

B

V

OL

CM

I

SC

LEAK

= 100kI to VCC, TA = -40NC to +85NC. Typical values are at TA = +25NC,

PULLUP

(V

- 0.2V) P VCM P (VCC + 0.2V) (Note 3)

GND

V

- 0.2V P VCM P

GND

VCC + 0.2V (Note 4)

TA = +25NC

TA = -40NC to +85NC

VCC = 1.8V, I

= 1mA

SINK

VCC = 5V, I 6mA

Inferred from VOS test

Sinking, V

VCC = 5.5V, V

SINK

OUT

=

= V

OUT

TA = +25NC

-40NC P TA P +85NC

TA = +25NC

-40NC P TA P +85NC TA = +25NC

-40NC P TA P +85NC

VCC = 1.8V 3

CC

VCC = 5V 30

= 5.5V 0.2 nA

V

GND

- 0.2V

4 6 mV

0.15 5

0.15

0.2

105 200

285 350

10

300

450

V

CC

+ 0.2V

mV

nA

mV

V

mA

�� Maxim Integrated Products 2

MAX44268

1.3mm x 1.3mm, Low-Power

Dual Comparator with Reference

ELECTRICAL CHARACTERISTICS (continued)

(VCC = 5V, V unless otherwise noted.) (Note 2)

PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS

AC CHARACTERISTICS

Propagation Delay High to Low (Note 5)

Propagation Delay Low to High (Note 5)

Fall Time t

POWER SUPPLY

Supply Voltage Range V

Power-Supply Rejection Ratio

Supply Current Per Comparator

Power-Up Time t

Reference Voltage V

Reference Voltage Temperature Coefficient

Reference Output Voltage Noise

Reference Line Regulation

Reference Load Regulation

Note 2: All devices are 100% production tested at TA = +25NC. Temperature limits are guaranteed by design. Note 3: Hysteresis is the input voltage difference between the two switching points. Note 4: VOS is the average of the positive and negative trip points minus V Note 5: Overdrive is defined as the voltage above or below the switching points.

GND

= 0V, V

IN-

= V

= 1.236V, R

IN+

Input overdrive = Q100mV, VCC = 5V

Input overdrive = Q100mV, VCC = 1.8V

t

PHL

t

PLH

F

CC

PSRR VCC = 1.8V to 5.5V 60 80 dB

I

CC

ON

REF

TC

VREF

e

N

δV

/δV

REF

δV

/δI

REF

Input overdrive = 100mV, VCC = 1.8V, Comparator A

Input overdrive = Q20mV, VCC = 5V

Input overdrive = Q20mV, VCC = 1.8V

Input overdrive = Q100mV, VCC = 5V

Input overdrive = Q100mV, VCC = 1.8V

Input overdrive = Q20mV, VCC = 5V

Input overdrive = Q20mV, VCC = 1.8V

C

LOAD

Guaranteed from PSRR tests 1.8 5.5 V

VCC = 1.8V, TA = +25NC

VCC = 5V, -40NC P TA P +85NC

TA = +25NC, 1%

-40NC < TA < +85NC

TA = +25NC, 1%

10Hz to 1kHz, C 10Hz to 6kHz, C

CCVCC

0 < I

OUT

= 100kI to VCC, TA = -40NC to +85NC. Typical values are at TA = +25NC,

PULLUP

6

7

10

14

19

38

13

39

20

= 15pF 0.2

0.6 0.95

0.7 1.15

1 ms

1.224 1.236 1.248

1.205 1.267

40

= 1nF 75

REF

= 1nF 130

REF

= 1.8V to 5.5V 0.35 mV/V

< 100nA 0.05 mV/nA

OUT

.

REF

1.4

Fs

FAVCC = 5V, TA = +25NC

V

ppm/NC

FV

RMS

�� Maxim Integrated Products 3

MAX44268

06

1.3mm x 1.3mm, Low-Power

Dual Comparator with Reference

Typical Operating Characteristics

(VCC = 5V, V

GND

= 0V, V

IN-

= V

= 1.236V, R

IN+

= 100kΩ to VCC, TA = -40NC to +85NC. Typical values are at TA = +25NC, unless

PULLUP

otherwise noted. All devices are 100% production tested at TA = +25NC. Temperature limits are guaranteed by design.)

SUPPLY CURRENT vs. TRANSITION

SUPPLY CURRENT vs. SUPPLY VOLTAGE

1.8

1.6

1.4

1.2

1.0

0.8

0.6

SUPPLY CURRENT (µA)

0.4

0.2

0

1.5 6.0

V

= HIGH

OUT

TA = +85°C

TA = -40°C

TA = +25°C

SUPPLY VOLTAGE (V)

INPUT OFFSET VOLTAGE

vs. TEMPERATURE

0

-0.05

-0.10

-0.15

-0.20

-0.25

-0.30

VDD = 2.7V

-0.35

INPUT OFFSET VOLTAGE (mV)

-0.40

-0.45

-0.50

-40 100

VDD = 5V

VDD = 1.8V

TEMPERATURE (°C)

OUTPUT VOLTAGE LOW

vs. PULLUP RESISTANCE

10,000

)

EE

- V

1000

OL

100

10

OUTPUT VOLTAGE LOW (V

1

100 100k 54321

PULLUP RESISTANCE (I)

MAX44268 toc01

5.55.04.54.03.53.02.52.0

MAX44268 toc04

806020 400-20

10k1k

SUPPLY CURRENT vs. SUPPLY VOLTAGE

1.8

1.6

1.4

1.2

1.0

0.8

0.6

SUPPLY CURRENT (µA)

0.4

0.2

0

1.5 6.0

V

= LOW

OUT

TA = +85°C

TA = -40°C

TA = +25°C

SUPPLY VOLTAGE (V)

INPUT BIAS CURRENT

vs. TEMPERATURE

0.20

0.18

0.16

0.14

0.12

0.10

VDD = 2.7V

0.08

0.06

INPUT BIAS CURRENT (nA)

0.04

0.02

0

-40 100

MAX44268 toc07

VDD = 5V

VDD = 1.8V

TEMPERATURE (°C)

10

9

MAX44268 toc02

5.55.04.54.03.53.02.52.0

MAX44268 toc05

806020 400-20

8

7

6

5

4

SUPPLY CURRENT (µA)

3

2

1

0

1 10k

500

450

400

350

300

250

200

150

INPUT BIAS CURRENT (nA)

100

50

0

-1 6

SHORT-CIRCUIT CURRENT

vs. SUPPLY VOLTAGE

40

V

35

30

25

20

15

10

SHORT-CIRCUIT CURRENT (mA)

= LOW

OUT

TA = +25°C

5

0

SUPPLY VOLTAGE (V)

FREQUENCY (V

OVERDRIVE

VCC = 2.7V

VCC = 1.8V

INPUT FREQUENCY (Hz)

INPUT BIAS CURRENT

vs. COMMON-MODE VOLTAGE

VDD = 2.7V

VDD = 5V

VDD = 0V

INPUT COMMON-MODE VOLTAGE (V)

TA = -40°C

TA = +85°C

= 20mV)

VCC = 5V

1k10010

VDD = 1.8V

MAX44268 toc08

MAX44268 toc03

MAX44268 toc06

542 310

�� Maxim Integrated Products 4

MAX44268

1.3mm x 1.3mm, Low-Power

Dual Comparator with Reference

Typical Operating Characteristics (continued)

(VCC = 5V, V

GND

= 0V, V

IN-

= V

= 1.236V, R

IN+

= 100kΩ to VCC, TA = -40NC to +85NC. Typical values are at TA = +25NC, unless

PULLUP

otherwise noted. All devices are 100% production tested at TA = +25NC. Temperature limits are guaranteed by design.)

PROPAGATION DELAY

INPUT OFFSET VOLTAGE HISTOGRAM

45

40

35

30

25

20

OCCURRENCE (%)

15

10

5

0

-2 INPUT OFFSET VOLTAGE (mV)

100

90

80

70

60

50

40

30

PROPAGATION DELAY (µs)

20

10

0

vs. INPUT OVERDRIVE (t

60

MAX44268 toc09

2.52.01.0 1.5-1.0 -0.5 0 0.5-1.5

PROPAGATION DELAY vs. CAPACITIVE LOAD

t

PLH

t

PHL

CAPACITIVE LOAD (pF)

PROPAGATION DELAY

8006004002000 1000

PLH

LEAKAGE CURRENT vs. TEMPERATURE

0.50

0.45

0.40

0.35

0.30

0.25

VCC = 5V

0.20

0.15

0.10

OUTPUT LEAKAGE CURRENT (nA)

0.05

0

-50 110

MAX44268 toc12

VCC = 2.7V

TEMPERATURE (°C)

)

MAX44268 toc10

VCC = 1.8V

907030 50-10 10-30

PROPAGATION DELAY vs. TEMPERATURE

45

40

35

30

25

20

15

PROPAGATION DELAY (µs)

10

5

0

-40 100

12

vs. PULLUP RESISTANCE

120

100

80

60

40

PROPAGATION DELAY (µs)

20

0

(V

OVERDRIVE

= 100mV, VDD = 5V)

t

PLH

t

PHL

TEMPERATURE (°C)

PROPAGATION DELAY

vs. INPUT OVERDRIVE (t

100k

PULLUP RESISTANCE (I)

806020 400-20

)

PLH

t

PLH

t

PHL

1M10k1k

MAX44268 toc13

MAX44268 toc11

10M

50

TA = -40°C

40

30

20

PROPAGATION DELAY (µs)

10

0

0 1000

INPUT OVERDRIVE VOLTAGE (mV)

TA = +25°C

TA = +85°C

MAX44268 toc14

800600400200

10

8

6

4

PROPAGATION DELAY (µs)

2

0

TA = +85°C

0 1000

INPUT OVERDRIVE VOLTAGE (mV)

TA = -40°C

TA = +25°C

800600400200

�� Maxim Integrated Products 5

MAX44268 toc15