MAX6786 MAXIM [Maxim Integrated Products], MAX6786 Datasheet

MAX6786

Manufacturer Part Number

MAX6786

Description

Low-Power, 1% Accurate, Dual-/Triple-/Quad-Level Battery Monitors in Small TDFN and TQFN Packages

Manufacturer

MAXIM [Maxim Integrated Products]

Datasheet

1.MAX6786.pdf (17 pages)

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19-0541; Rev 3; 3/10

The MAX6782–MAX6790 are low-power, 1% accurate,

dual-/triple-/quad-level battery monitors offered in small

TDFN and TQFN packages. These devices are ideal for

monitoring single lithium-ion (Li+) cells, or multicell alka-

line/NiCd/NiMH power sources. These devices feature

fixed and adjustable hysteresis options to eliminate out-

put chattering associated with battery-voltage monitors.

The MAX6782/MAX6783 offer four battery monitors in a

single package with factory-set (0.5%, 5%, 10%) or

adjustable hysteresis. The MAX6784/MAX6785 provide

three battery monitors with factory-set (0.5%, 5%, 10%)

or adjustable hysteresis. The MAX6786/MAX6787/

MAX6788 offer two battery monitors with external inputs

for setting the rising and falling thresholds, allowing

external hysteresis control. The MAX6789/MAX6790 fea-

ture quad-level overvoltage detectors with complemen-

tary outputs.

The MAX6782–MAX6790 are offered with either open-drain

or push-pull outputs. The MAX6782/MAX6784/MAX6786/

MAX6789 are available with push-pull outputs while the

MAX6783/MAX6785/MAX6787/MAX6790 are available with

open-drain outputs. The MAX6788 is available with one

open-drain output and one push-pull output (see the

Selector Guide ). This family of devices is offered in space-

saving TDFN and TQFN packages and is fully specified

over the -40°C to +85°C extended temperature range.

Battery-Powered Systems

(Single-Cell Li+ or

Multicell NiMH, NiCd,

Alkaline)

Cell Phones/Cordless

Phones

Note: All devices are available in tape and reel in 2.5k increments. For tape and reel orders, add a “T” after the “+” to complete the part

number.

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.

MAX6782TE_+

MAX6783TE_+

MAX6784TC_+

MAX6785TC_+

MAX6786TA+

MAX6787TA+

MAX6788TA+

MAX6789TB+

MAX6790TB+

Battery Monitors in Small TDFN and TQFN Packages

PART

Low-Power, 1% Accurate, Dual-/Triple-/Quad-Level

________________________________________________________________ Maxim Integrated Products

MONITOR LEVEL

General Description

Pagers

Portable Medical Devices

PDAs

Electronic Toys

MP3 Players

Applications

LBO OUTPUT

Quad

Triple

Dual

—

Single

—

o 1% Accurate Threshold Specified Over Full

o Dual-/Triple-/Quad, Low-Battery Output Options

o Low 5.7µA Battery Current

o Open-Drain or Push-Pull Outputs

o Fixed or Adjustable Hysteresis

o Low Input Bias Current

o Guaranteed Valid Low-Battery-Output Logic State

o Reverse-Battery Protection

o Immune to Short Battery Transients

o Fully Specified from -40°C to +85°C

o Small TDFN and TQFN Packages

Ordering Information continued at end of data sheet.

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

* EP = Exposed pad.

The MAX6782/MAX6783/MAX6784/MAX6785 are available with

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

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

Pin Configuration and Typical Operating Circuit appear at

end of data sheet.

MAX6782TE_+

MAX6783TE_+

MAX6784TC_+

MAX6785TC_+

Temperature Range

Down to V

PART

Single

—

BATT

Push-Pull/Open Drain

= 1.05V

OUTPUT TYPE

-40°C to +85°C

TEMP RANGE

Open Drain

Ordering Information

Push-Pull

Selector Guide

PIN-PACKAGE

16 TQFN-EP*

12 TQFN-EP*

HYSTERESIS

Features

Fixed/Adj

Adj

—

Related parts for MAX6786

MAX6786 Summary of contents

Page 1

... The MAX6784/MAX6785 provide three battery monitors with factory-set (0.5%, 5%, 10%) or adjustable hysteresis. The MAX6786/MAX6787/ MAX6788 offer two battery monitors with external inputs for setting the rising and falling thresholds, allowing external hysteresis control. The MAX6789/MAX6790 fea- ture quad-level overvoltage detectors with complemen- tary outputs ...

Page 2

... TEMPCO Coefficient Reference Short-Circuit Current Hysteresis Adjustment Range Hysteresis Adjustment Logic Low Hysteresis Adjustment Logic V High MAX6786/MAX6787/MAX6788 LBL_, LBH_ Threshold LBL_, LBH_ Input Leakage Current 2 _______________________________________________________________________________________ Continuous Power Dissipation (T 8-Pin TDFN (derate 23.8mW/°C above +70°C) ..........1905mW 10-Pin TDFN (derate 24.4mW/°C above +70°C) ........1951mW + 0.3V) and +6V) 12-Pin Thin QFN (derate 16.7mW/° ...

Page 3

Low-Power, 1% Accurate, Dual-/Triple-/Quad-Level Battery Monitors in Small TDFN and TQFN 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 MAX6782–MAX6788 LBO_ Propagation ...

Page 4

Page 5

Low-Power, 1% Accurate, Dual-/Triple-/Quad-Level Battery Monitors in Small TDFN and TQFN Packages (V = 3.6V +25°C, unless otherwise noted.) BATT A SUPPLY CURRENT vs. TEMPERATURE 8 BATT 7 3.6V BATT 7.0 6.5 6.0 ...

Page 6

Low-Power, 1% Accurate, Dual-/Triple-/Quad-Level Battery Monitors in Small TDFN and TQFN Packages (V = 3.6V +25°C, unless otherwise noted.) BATT A LBO OUTPUT VOLTAGE LOW vs. SINK CURRENT 0 1.8V BATT V = 3.3V BATT 0.5 ...

Page 7

Low-Power, 1% Accurate, Dual-/Triple-/Quad-Level Battery Monitors in Small TDFN and TQFN Packages MAX6782/MAX6783/MAX6784/MAX6785 PIN NAME MAX6782/ MAX6784/ MAX6783 MAX6785 1 1 IN2 2 2 IN3 3 — IN4 4 3 REF 5 4 HADJ1 6 5 HADJ2 7 6 HADJ3 ...

Page 8

... Low-Power, 1% Accurate, Dual-/Triple-/Quad-Level Battery Monitors in Small TDFN and TQFN Packages MAX6786/MAX6787/MAX6788 PIN NAME 1 LBL1 Falling Trip Level Input 1. Connect to an external resistive divider to set the falling trip level. 2 LBH1 Rising Trip Level Input 1. Connect to an external resistive divider to set the rising trip level. ...

Page 9

... Battery Monitors in Small TDFN and TQFN Packages REFERENCE HYSTERESIS MAX6782 MAX6783 MAX6784 MAX6785 ( ) MAX6782/MAX6783 ONLY Figure 1. MAX6782–MAX6785 Block Diagram R 1 LBL_ R HYST LBH_ R 2 Figure 2. MAX6786/MAX6787/MAX6788 Block Diagram _______________________________________________________________________________________ BATT INTERNAL LADDER HYSTERESIS SELECT GND BATT REF GND REF IN1 COMPARATOR HADJ1 SECTION 1 LBO1 IN2 ...

Page 10

Low-Power, 1% Accurate, Dual-/Triple-/Quad-Level Battery Monitors in Small TDFN and TQFN Packages IN_ REF CLEAR Figure 3. MAX6789/MAX6790 Block Diagram Low-Battery/Overvoltage Output All devices are offered with either push-pull or open- drain outputs (see the Selector Guide ). The MAX6788 ...

Page 11

Low-Power, 1% Accurate, Dual-/Triple-/Quad-Level Battery Monitors in Small TDFN and TQFN Packages V INR V INF IN_ V HALL V HADJ_ LBO_ A) NORMAL OPERATION FOR V < V HADJ_ V INR V INF IN_ V HADJ_ V HALH LBO_ ...

Page 12

... HALL tory-set hysteresis (Figure 4a). MAX6786/MAX6787/MAX6788 Adjustable The MAX6786/MAX6787/MAX6788 offer external hystere- sis control through the resistive divider that monitors bat- tery voltage. Figure 2 shows the connections for external hysteresis. See Calculating an External Hysteresis Resistive Divider (MAX6786/MAX6787/MAX6788) section RISING for more information ...

Page 13

... − REF INF is the desired falling voltage threshold − V INR INF = × Hysteresis % 100 V INR is the rising voltage. Calculating an External Hysteresis Resistive Divider (MAX6786/MAX6787/MAX6788) × BATT = × the above example V − V BATT ...

Page 14

... The outputs may only be connected to devices pow- ered by the same battery as the MAX6782– MAX6790. Note that the MAX6782–MAX6790 will not protect other devices in the circuit. Figure 7 shows the MAX6786/MAX6787/MAX6788 in a typical two-battery-level monitoring circuit. 1 LBO_ Figure 7. Two-Battery-Level Monitor Configuration ...

Page 15

... LBO2 IN2 MAX6782 MAX6783 LBO3 IN3 LBO4 IN4 REF HADJ_ GND Ordering Information (continued) Top Marks PART TOP MARK MAX6786TA+T +AEG MAX6787TA+T +AEH MAX6788TA+T +AEI MAX6789TB+T +AEJ MAX6790TB+T +AEK + Denotes a lead-free/RoHS-compliant package. +AEL * EP = Exposed pad. +AAV The MAX6782/MAX6783/MAX6784/MAX6785 are available with +AAW factory-trimmed hysteresis. Specify trim by replacing “ ...

Page 16

... Low-Power, 1% Accurate, Dual-/Triple-/Quad-Level Battery Monitors in Small TDFN and TQFN Packages TOP VIEW BATT 13 GND 14 MAX6782 N.C. 15 MAX6783 16 + IN1 1 2 THIN QFN 8 7 MAX6786 MAX6787 MAX6788 + 1 2 TDFN Chip Information PROCESS: BiCMOS 16 ______________________________________________________________________________________ 9 HADJ4 8 BATT 7 HADJ3 GND 6 HADJ2 IN1 EP 5 HADJ1 ...

Page 17

... REVISION NUMBER DATE 0 8/06 Initial release 1 10/06 Released the MAX6784, MAX6786–MAX6790. 2 5/08 Updated the Pin Description tables. Updated the Absolute Maximum Ratings and the Electrical Characteristics 3 3/10 table. Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are implied ...

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