MAX6771 MAXIM [Maxim Integrated Products], MAX6771 Datasheet

MAX6771

Manufacturer Part Number

MAX6771

Description

Low-Power, 1%-Accurate Battery Monitors in ?DFN and SC70 Packages

Manufacturer

MAXIM [Maxim Integrated Products]

Datasheet

1.MAX6771.pdf (11 pages)

Available stocks

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Part Number

Manufacturer

Quantity

Price

Company:

Bonase Electronics (HK) Co., Limited

Part Number:

MAX6771TALD2+T

Manufacturer:

Maxim

Quantity:

2 500

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The MAX6775–MAX6781 low-power, 1%-accurate bat-

tery monitors are available in the ultra-small µDFN

package (1.0mm x 1.5mm) and SC70 packages. These

low-power devices are ideal for monitoring single lithi-

um-ion (Li+) cells, or multicell alkaline/NiCd/NiMH

power sources. These devices offer single (MAX6775/

MAX6776/MAX6777/MAX6778) or dual (MAX6779/

MAX6780/MAX6781) low-battery outputs and feature

fixed or resistor-adjustable hysteresis. Hysteresis elimi-

nates the output chatter sometimes associated with bat-

tery voltage monitors, usually due to input-voltage noise

or battery terminal voltage recovery after load removal.

These devices are available in several versions: with

single- or dual-voltage monitors, and with fixed or

adjustable hysteresis. The MAX6775/MAX6776 offer a

single battery monitor and factory-set hysteresis of

0.5%, 5%, or 10%. The MAX6779/MAX6780/MAX6781

have two battery monitors in a single package and fac-

tory-set hysteresis of 0.5%, 5%, or 10%. The MAX6777/

MAX6778 offer a single battery monitor with external

inputs for the rising and falling thresholds, allowing

external hysteresis control.

For convenient interface with system power circuitry or

microprocessors, both open-drain and push-pull out-

puts are available. The single-channel devices are

available with open-drain or push-pull outputs. The

dual-channel devices are available with both outputs

open-drain, both outputs push-pull, or one of each

(see the Selector Guide ). This family of devices is

offered in small 5-pin SC70 and ultra-small 6-pin µDFN

packages, and is fully specified over the -40°C to

+85°C extended temperature range.

19-3774; Rev 4; 5/09

Pin Configurations appear at end of data sheet.

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.

Battery-Powered Systems (Single-Cell Li+ or

Multicell NiMH, NiCd, Alkaline)

Cell Phones/Cordless Phones

Pagers

Portable Medical Devices

PDAs

Electronic Toys

MP3 Players

________________________________________________________________ Maxim Integrated Products

General Description

Monitors in µDFN and SC70 Packages

Applications

Low-Power, 1%-Accurate Battery

o 1.0%-Accurate Threshold Specified Over

o Single/Dual, Low-Battery Output Options

o Low 3µA Battery Current

o Open-Drain or Push-Pull Low-Battery Outputs

o Fixed or Adjustable Hysteresis

o Low-Input Leakage Current Allows Use of Large

o Guaranteed Valid Low-Battery-Output Logic State

o Immune to Short Battery Transients

o Fully Specified from -40°C to +85°C

o Small 5-Pin SC70 or Ultra-Small 6-Pin µDFN

Ordering Information continued at end of data sheet.

+ Denotes a lead(Pb)-free/RoHS-compliant package.

T = Tape and reel.

MAX6775/MAX6776/MAX6779/MAX6780/MAX6781 are available

with factory-trimmed hysteresis. Specify trim by replacing “_”

with “A” for 0.5%, “B” for 5%, or “C” for 10% hysteresis.

MAX6775XK_+T

MAX6775LT_+T

MAX6776XK_+T

MAX6776LT_+T

MAX6777XK+T

MAX6777LT+T

Temperature

Resistors

Down to V

(1mm x 1.5mm) Package

3.6V

PART

BATT

Typical Operating Circuit

LBI

= 1V

MAX6775

Ordering Information

BATT

-40°C to +85°C

TEMP RANGE

LBO

SHDN

PIN-PACKAGE

5 SC70

6 µDFN

5 SC70

6 µDFN

5 SC70

6 µDFN

CONVERTER

Features

DC-DC

OUT

Related parts for MAX6771

MAX6771 Summary of contents

Page 1

Rev 4; 5/09 Monitors in µDFN and SC70 Packages General Description The MAX6775–MAX6781 low-power, 1%-accurate bat- tery monitors are available in the ultra-small µDFN package (1.0mm x 1.5mm) and SC70 packages. These low-power devices are ideal for monitoring single ...

Page 2

Low-Power, 1%-Accurate Battery Monitors in µDFN and SC70 Packages ABSOLUTE MAXIMUM RATINGS BATT to GND............................................................-0.3V to +6V LBI, LBL, LBH, LBI1, LBI2 to GND ...............-0.3V to minimum of ((V LBO, LBO1, LBO2 to GND (open-drain) .................-0.3V to +6V LBO, LBO1, ...

Page 3

Monitors in µDFN and SC70 Packages ELECTRICAL CHARACTERISTICS (continued 1.6V to 5.5V -40°C to +85°C, unless otherwise specified. Typical values are at T BATT A PARAMETER SYMBOL LOW-BATTERY OUTPUTS (LBO, LBO1, LBO2) Propagation Delay t Startup ...

Page 4

Low-Power, 1%-Accurate Battery Monitors in µDFN and SC70 Packages (T = +25°C, unless otherwise noted.) A NORMALIZED THRESHOLD VOLTAGES vs. TEMPERATURE, MAX67__A 1 NORMALIZED +25° RISING -1 FALLING - -40 -15 10 ...

Page 5

Low-Power, 1%-Accurate Battery Monitors in µDFN and SC70 Packages MAX6775/ MAX6777/ MAX6776 MAX6778 µDFN SC70 µDFN SC70 1 1 — — — — — 5 — ...

Page 6

Low-Power, 1%-Accurate Battery Monitors in µDFN and SC70 Packages Detailed Description These battery monitors have an active-low output that asserts when the input falls below a set voltage. They also offer hysteresis for noise immunity, and to remove the possibility ...

Page 7

Monitors in µDFN and SC70 Packages The MAX6779, MAX6780, and MAX6781 monitor two battery levels or two independent voltages. A common application for this type of dual-battery monitor is to use one output as an early warning signal and the ...

Page 8

Low-Power, 1%-Accurate Battery Monitors in µDFN and SC70 Packages Calculating an External Hysteresis Resistive Divider Setting the hysteresis externally requires three external resistors, as shown in Figure 3. Select R lowing formula: × BATT RISING _ ≤ ...

Page 9

Monitors in µDFN and SC70 Packages PART MAX6775XKA+T MAX6775XKB+T MAX6775XKC+T MAX6775LTA+T MAX6775LTB+T MAX6775LTC+T MAX6776XKA+T MAX6776XKB+T MAX6776XKC+T MAX6776LTA+T MAX6776LTB+T MAX6776LTC+T Ordering Information (continued) PART TEMP RANGE MAX6778XK+T -40°C to +85°C MAX6778LT+T -40°C to +85°C MAX6779LT_+T -40°C to +85°C MAX6780LT_+T -40°C to ...

Page 10

Low-Power, 1%-Accurate Battery Monitors in µDFN and SC70 Packages TOP VIEW + GND2 1 MAX6775 2 GND MAX6776 LBI 3 SC70 + LBH 1 5 BATT MAX6777 GND 2 MAX6778 LBL 3 4 LBO SC70 For the latest package outline ...

Page 11

Monitors in µDFN and SC70 Packages REVISION REVISION NUMBER DATE 4 5/09 Updated Calculating an External Hysteresis Resistive Divider section Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit ...

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