Rainbow Electronics MAX6380 User Manual

General Description

The MAX6375–MAX6380 are ultra-low-power circuits
used for monitoring battery, power-supply, and regulat­ed system voltages. Each detector contains a precision
bandgap reference, comparator, and internally trimmed
resistors that set specified trip threshold voltages.
These devices provide excellent circuit reliability and
low cost by eliminating external components and
adjustments when monitoring nominal system voltages
from 2.5V to 5V.

These circuits perform a single function: they assert an
output signal whenever the VCCsupply voltage falls
below a preset threshold. The devices are differentiated
by their output logic configurations and preset thresh­old voltages. The MAX6375/MAX6378 (push-pull) and
MAX6377/MAX6380 (open-drain) have an active-low
output (OUT is logic low when VCCis below VTH). The
MAX6376/MAX6379 have an active-high push-pull out­put (OUT is logic high when VCCis below VTH). All
parts are guaranteed to be in the correct output logic
state for VCCdown to 1V. The detector is designed to
ignore fast transients on VCC. The MAX6375/MAX6376/
MAX6377 have voltage thresholds between 2.20V and

3.08V in approximately 100mV increments. The
MAX6378/MAX6379/MAX6380 have voltage thresholds
between 3.30V and 4.63V in approximately 100mV
increments.

Ultra-low supply current of 500nA (MAX6375/MAX6376/
MAX6377) makes these parts ideal for use in portable
equipment. All six devices are available in a space-sav­ing SC70 package or in a tiny SOT23 package.

Applications

Precision Battery Monitoring

Load Switching/Power Sequencing

Power-Supply Monitoring in Digital/Analog Systems

Portable/Battery-Powered Equipment

Features

♦ Ultra-Low 500nA Supply Current

(MAX6375/MAX6376/MAX6377)

♦ Thresholds Available from 2.20V to 4.63V in

Approximately 100mV Increments

♦ ±2.5% Threshold Accuracy Over Temperature

♦ Low Cost
♦ Available in Three Versions: Push-Pull OUT,

Push-Pull OUT, and Open-Drain OUT

♦ Power-Supply Transient Immunity

♦ No External Components

♦ Available in Either a 3-Pin SC70

or 3-Pin SOT23 Package

MAX6375–MAX6380

3-Pin, Ultra-Low-Power SC70/SOT23

Voltage Detectors

________________________________________________________________ Maxim Integrated Products 1

Pin Configuration

19-1721; Rev 1; 12/01

*

The MAX6375/MAX6376/MAX6377 are available in factory-pre­set thresholds from 2.20V to 3.08V, in approximately 0.1V incre­ments. The MAX6378/MAX6379/MAX6380 are available in
factory-preset thresholds from 3.30V to 4.63V, in approximately

0.1V increments. Choose the desired threshold suffix from
Table 1 and insert it in the blank spaces following R. There are
21 standard versions, with a required order increment of 2500
pieces. Sample stock is generally held on the standard versions
only (see the Selector Guide). The required order increment is
10,000 pieces for nonstandard versions (Table 2). Contact facto­ry for availability. All devices available in tape-and-reel only.

Ordering Information

Selector Guide appears at end of data sheet.

For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at
1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.

Ordering information continued at end of data sheet

PART* TEMP RANGE PIN-PACKAGE

MAX6375UR _ _ -T -40°C to +85°C 3 SOT23-3

MAX6375XR _ _ -T -40°C to +85°C 3 SC70-3

MAX6376UR _ _ -T -40°C to +85°C 3 SOT23-3

MAX6376XR _ _ -T -40°C to +85°C 3 SC70-3

TOP VIEW

3

OUT(OUT)

V

CC

GND

1

MAX6375UR–

2

MAX6380UR

SOT23-3

1

GND

MAX6375XR–

MAX6380XR

OUT(OUT)

( ) ARE FOR MAX6376/MAX6379 ONLY.

2

SC70-3

V

3

CC

MAX6375–MAX6380

3-Pin, Ultra-Low-Power SC70/SOT23
Voltage Detectors

2 _______________________________________________________________________________________

ABSOLUTE MAXIMUM RATINGS

ELECTRICAL CHARACTERISTICS

(VCC= full range, TA= -40°C to +85°C, unless otherwise noted. Typical values are at TA= +25°C and VCC= 3V.) (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.

Terminal Voltage (with respect to GND)
V

CC

...........................................................................-0.3V to +6V

OUT, OUT (push-pull) ................................-0.3V to (V

CC

+ 0.3V)

OUT (open-drain) .....................................................-0.3V to +6V

Input Current (V

CC

).............................................................20mA

Output Current (OUT, OUT) ................................................20mA

Continuous Power Dissipation (T

A

= +70°C)

3-Pin SC70 (derate 2.17mW/°C above +70°C)...........174mW

3-Pin SOT23 (derate 4mW/°C above +70°C)..............320mW

Operating Temperature Range ...........................-40°C to +85°C

Storage Temperature Range .............................-65°C to +150°C

Junction Temperature......................................................+150°C

Lead Temperature (soldering, 10s) .................................+300°C

Note 1: Production tested at +25°C only. Overtemperature limits are guaranteed by design, not production tested.

42VCC= (VTH- 100mV) to (VTH+ 100mV)

I

SINK

= 100µA, VCC≥ 1.2V, OUT asserted

0.4

V

OL

OUT Output Voltage
(MAX6375/MAX6377/
MAX6378/MAX6380)

I

SINK

= 1.6mA, VCC> 2.1V, OUT asserted

0.3
V

MAX6375/76/77 only, VCC= 3.0V for VTH≤ 2.93V,
VCC= 3.2V for VTH> 2.93V, no load

I

SOURCE

= 500µA, VCC= 3.2V, MAX6375 only

V

OH

I

SOURCE

= 800µA, VCC= 4.5V, VTH≤ 4.38V

OUT Output Voltage
(MAX6375/MAX6377)

I

SOURCE

= 800µA, VCC= V

TH(MAX)

, VTH≥ 4.5V

V

TA= -40°C to +85°C

TA= 0°C to +70°C

CONDITIONS

ppm/°C40∆VTH/°CVoltage Threshold Tempco

VVCCOperating Range

UNITSMIN TYP MAXSYMBOLPARAMETER

VCC= (VTH+ 100mV) to (VTH- 100mV)

µs

20

Propagation Delay

MAX6375/MAX6376/MAX6377 6.3

MAX6378/MAX6379/MAX6380 9.5

mV

Voltage Threshold
Hysteresis

0.1 µA

Open-Drain OUT Output
Leakage Current

0.8 ✕V

CC

0.8 ✕V

CC

0.8 ✕V

CC

1.0 5.5

1.2 5.5

TA= -40°C to +85°C

TA= +25°C

Table 1

VTH- 2.5% VTHVTH+ 2.5%

V

TH

V

VTH-1.5% VTHVTH+1.5%

Voltage Threshold

VCC= 5.5V, no load

I

CC

Supply Current

0.5 1.0
µA

1.0 1.75

I

SOURCE

= 500µA, VCC≥ 2.1V, OUT asserted

0.8 ✕V

CC

0.8 ✕V

CC

I

SINK

= 1.2mA, VCC≥ 3.2V, OUT not asserted,

MAX6376 only

0.3

I

SOURCE

= 50µA, VCC≥ 1.2V, OUT asserted

V

OH

V

I

SINK

= 3.2mA, VCC≥ 4.5V, OUT not asserted,

VTH≤ 4.38V

0.4

I

SINK

= 3.2mA, VCC= V

TH(MAX)

, VTH≥ 4.5V 0.4

V

OL

OUT Output Voltage
(MAX6376/MAX6379)

MAX6375–MAX6380

3-Pin, Ultra-Low-Power SC70/SOT23

Voltage Detectors

______________________________________________________________________________________ 3

__________________________________________Typical Operating Characteristics

(V

CC

= 5V, TA = +25°C, unless otherwise noted.)

Pin Description

MAX6375/MAX6378
MAX6377/MAX6380

MAX6376
MAX6379

V

CC

OUT

OUT

GND

NAME

Supply Voltage33

Active-High Output. OUT remains high while VCCis below the threshold.2—

Active-Low Output. OUT remains low while VCCis below the threshold. OUT is
open-drain on the MAX6377/MAX6380 and push-pull on the MAX6375/MAX6378.

—2

Ground11

FUNCTION

PIN

SUPPLY CURRENT vs. TEMPERATURE

1.0

0.9

0.8

0.7

0.6

0.5

0.4

0.3

SUPPLY CURRENT (µA)

0.2

0.1

0

-40 0-20 20 40 60 80

VCC = 5V

VCC = 3.3V

VCC = 1.2V

TEMPERATURE (°C)

PROPAGATION DELAY (RISING)

vs. TEMPERATURE

140

120

100

80

VOD = 10mV

VOD = 20mV

MAX6375-01

PROPAGATION DELAY (µs)

MAX6375-03

PROPAGATION DELAY (FALLING)

vs. TEMPERATURE

200

150

100

50

0

VOD = 20mV

VOD = 10mV

VOD = 100mV

VOD = 200mV

-40 0-20 20 40 60 80
TEMPERATURE (°C)

MAXIMUM TRANSIENT DURATION

vs. THRESHOLD OVERDRIVE

500

400

300

MAX6375-02

MAX6375-04

60

40

PROPAGATION DELAY (µs)

20

0

-40 0 20-20 40 60 80

VOD = 100mV

VOD = 200mV

TEMPERATURE (°C)

200

100

MAXIMUM TRANSIENT DURATION (µs)

0

1 100 1000

OUT/OUT IS ASSERTED

ABOVE LINE

10

THRESHOLD OVERDRIVE

V

- V

(mV)

TH

CC

MAX6375–MAX6380

3-Pin, Ultra-Low-Power SC70/SOT23
Voltage Detectors

4 _______________________________________________________________________________________

____________ Applications Information

Interfacing to Different

Logic Voltage Components

The MAX6377/MAX6380 have an active-low, open­drain output. This output structure will sink current
when OUT is asserted. Connect a pull-up resistor from
OUT to any supply voltage up to 5.50V (Figure 1).
Select a resistor value large enough to allow a valid
logic low (see Electrical Characteristics), and small
enough to register a logic high while supplying all input
current and leakage paths connected to the OUT line.

Negative-Going VCCTransients

These devices are relatively immune to short-duration,
negative-going VCCtransients (glitches). The Typical
Operating Characteristics show the Maximum Transient
Duration vs. Threshold Overdrive graph, for which out­put pulses are not generated. The graph shows the
maximum pulse width that a negative-going VCCtran­sient may typically have before the devices issue out­put signals. As the amplitude of the transient increases,
the maximum-allowable pulse width decreases.

Figure 1. Interfacing to Different Logic Voltage Components

Table 1. Factory-Trimmed Reset Thresholds

‡

‡

Factory-trimmed reset thresholds are available in approximately 100mV increments with a 1.5% room-temperature variance.

OUT

SUSPEND

µP

V

IN

V

CC

V

OUT

3.6V
Li+

REGULATED

3.0V

V

CC

DC/DC

CONVERTER

(OPEN-DRAIN)

MAX6377

PART SUFFIX

MIN TYP MAX MIN MAX

22 2.167 2.200 2.233 2.145 2.250

23 2.285 2.320 2.355 2.262 2.375

24 2.364 2.400 2.436 2.340 2.460

MAX6375_R

MAX6376_R

MAX6377_R

25 2.462 2.500 2.537 2.437 2.562

26 2.591 2.630 2.669 2.564 2.696

27 2.660 2.700 2.741 2.633 2.768

28 2.758 2.800 2.842 2.730 2.870

29 2.886 2.930 2.974 2.857 3.000

30 2.955 3.000 3.045 2.925 3.075

31 3.034 3.080 3.126 3.003 3.150

RESET THRESHOLD VOLTAGE, VTH (V)

TA = +25°C TA = -40°C TO +85°C

3-Pin, Ultra-Low-Power SC70/SOT23

Voltage Detectors

_______________________________________________________________________________________ 5

Table 1. Factory-Trimmed Reset Thresholds‡(continued)

‡

Factory-trimmed reset thresholds are available in approximately 100mV increments with a 1.5% room-temperature variance.

Table 2. Device Marking Codes and Minimum Order Increments

MAX6375–MAX6380

PART SUFFIX

MIN TYP MAX MIN MAX

33 3.250 3.300 3.350 3.217 3.383

34 3.349 3.400 3.451 3.315 3.485

35 3.447 3.500 3.552 3.412 3.587

36 3.546 3.600 3.654 3.510 3.690

37 3.644 3.700 3.755 3.607 3.792

MAX6378_R

MAX6379_R

MAX6380_R

38 3.743 3.800 3.857 3.705 3.895

39 3.841 3.900 3.958 3.802 3.997

40 3.940 4.000 4.060 3.900 4.100

41 4.038 4.100 4.161 3.997 4.202

42 4.137 4.200 4.263 4.095 4.305

43 4.235 4.300 4.364 4.192 4.407

44 4.314 4.380 4.446 4.270 4.489

45 4.432 4.500 4.567 4.387 4.612

46 4.560 4.630 4.699 4.514 4.746

RESET THRESHOLD VOLTAGE, VTH (V)

TA = +25°CT

= -40°C TO +85°C

A

PART

MAX6375_R22-T ADH FZHD 2.5

MAX6375_R23-T ADI FZHE 2.5

MAX6375_R24-T —— 10

MAX6375_R25-T —— 10

MAX6375_R26-T ACZ FZHC 2.5

MAX6375_R27-T —— 10

MAX6375_R28-T —— 10

MAX6375_R29-T ADJ FZHF 2.5

MAX6375_R30-T —— 10

MAX6375_R31-T ADK FZHG 2.5

MAX6376_R22-T ADL FZHH 2.5

MAX6376_R23-T ADM FZHI 2.5

MAX6376_R24-T —— 10

MAX6376_R25-T —— 10

MAX6376_R26-T ADN FZHJ 2.5

MAX6376_R27-T —— 10

MAX6376_R28-T —— 10

MAX6376_R29-T ADA FZHK 2.5

TOP MARK

(SC70)

TOP MARK

(SOT23)

ORDER

INCREMENT (k)

PART

MAX6376_R30-T —— 10

MAX6376_R31-T ADO FZHL 2.5

MAX6377_R22-T ADP FZHM 2.5

MAX6377_R23-T ADB FZHN 2.5

MAX6377_R24-T —— 10

MAX6377_R25-T —— 10

MAX6377_R26-T ACQ FZHO 2.5

MAX6377_R27-T —— 10

MAX6377_R28-T —— 10

MAX6377_R29-T ADC FZHP 2.5

MAX6377_R30-T —— 10

MAX6377_R31-T ADR FZHQ 2.5

MAX6378_R33-T —— 10

MAX6378_R34-T —— 10

MAX6378_R35-T —— 10

MAX6378_R36-T —— 10

MAX6378_R37-T —— 10

MAX6378_R38-T —— 10

TOP MARK

(SC70)

TOP MARK

(SOT23)

ORDER

INCREMENT (k)

MAX6375–MAX6380

3-Pin, Ultra-Low-Power SC70/SOT23
Voltage Detectors

6 _______________________________________________________________________________________

___________________Chip Information

TRANSISTOR COUNT: 419

Table 2. Device Marking Codes and Minimum Order Increments (continued)

Selector Guide

(Standard Versions**)

**Sample stock is generally held on all standard versions.
Contact factory for availability of nonstandard versions.

Ordering Information (continued)

*

The MAX6375/MAX6376/MAX6377 are available in factory-pre­set thresholds from 2.20V to 3.08V, in approximately 0.1V incre­ments. The MAX6378/MAX6379/MAX6380 are available in
factory-preset thresholds from 3.30V to 4.63V, in approximately

0.1V increments. Choose the desired threshold suffix from Table
1 and insert it in the blank spaces following R. There are 21 stan­dard versions, with a required order increment of 2500 pieces.
Sample stock is generally held on the standard versions only
(see the Selector Guide). The required order increment is 10,000
pieces for nonstandard versions (Table 2). Contact factory for
availability. All devices available in tape-and-reel only.

PART

MAX6378_R39-T —— 10

MAX6378_R40-T —— 10

MAX6378_R41-T —— 10

MAX6378_R42-T —— 10

MAX6378_R43-T —— 10

MAX6378_R44-T ADS FZHU 2.5

MAX6378_R45-T —— 10

MAX6378_R46-T ADD FZHV 2.5

MAX6379_R33-T —— 10

MAX6379_R34-T —— 10

MAX6379_R35-T —— 10

MAX6379_R36-T —— 10

MAX6379_R37-T —— 10

MAX6379_R38-T —— 10

MAX6379_R39-T —— 10

MAX6379_R40-T —— 10

MAX6379_R41-T —— 10

MAX6379_R42-T —— 10

TOP MARK

(SC70)

TOP MARK

(SOT23)

ORDER

INCREMENT (k)

PART

MAX6379_R43-T —— 10

MAX6379_R44-T ADE FZHW 2.5

MAX6379_R45-T —— 10

MAX6379_R46-T ADT FZHX 2.5

MAX6380_R33-T —— 10

MAX6380_R34-T —— 10

MAX6380_R35-T —— 10

MAX6380_R36-T —— 10

MAX6380_R37-T —— 10

MAX6380_R38-T —— 10

MAX6380_R39-T —— 10

MAX6380_R40-T —— 10

MAX6380_R41-T —— 10

MAX6380_R42-T —— 10

MAX6380_R43-T —— 10

MAX6380_R44-T ADU FZHY 2.5

MAX6380_R45-T —— 10

MAX6380_R46-T ADF FZHZ 2.5

TOP MARK

(SC70)

TOP MARK

(SOT23)

ORDER

INCREMENT (k)

PART NOMINAL VTH (V)

MAX63 _ _ _ R46-T 4.63

MAX63 _ _ _ R44-T 4.38

MAX63 _ _ _ R31-T 3.08

MAX63 _ _ _ R29-T 2.93

MAX63 _ _ _ R26-T 2.63

MAX63 _ _ _ R23-T 2.32

MAX63 _ _ _ R22-T 2.20

PART* TEMP RANGE PIN-PACKAGE

MAX6377UR _ _ -T -40°C to +85°C 3 SOT23-3

MAX6377XR _ _ -T -40°C to +85°C 3 SC70-3

MAX6378UR _ _ -T -40°C to +85°C 3 SOT23-3

MAX6378XR _ _ -T -40°C to +85°C 3 SC70-3

MAX6379UR _ _ -T -40°C to +85°C 3 SOT23-3

MAX6379XR _ _ -T -40°C to +85°C 3 SC70-3

MAX6380UR _ _ -T -40°C to +85°C 3 SOT23-3

MAX6380XR _ _ -T -40°C to +85°C 3 SC70-3

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_____________________ 7

© 2001 Maxim Integrated Products Printed USA is a registered trademark of Maxim Integrated Products.

________________________________________________________Package Information

3-Pin, Ultra-Low-Power SC70/SOT23

Voltage Detectors

MAX6375–MAX6380

SC70, 3L.EPS