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19-0541; Rev 1; 10/06
Low-Power, 1% Accurate, Dual-/Triple-/Quad-Level Battery Monitors in Small TDFN and TQFN Packages
General Description
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 alkaline/NiCd/NiMH power sources. These devices feature fixed and adjustable hysteresis options to eliminate output 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 feature quad-level overvoltage detectors with complementary 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 spacesaving TDFN and TQFN packages and is fully specified over the -40°C to +85°C extended temperature range.
Features
o 1% Accurate Threshold Specified Over Full Temperature Range 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 Down to VBATT = 1.05V 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
MAX6782–MAX6790
Ordering Information
PART MAX6782TE_+ MAX6783TE_+ MAX6784TC_+ MAX6785TC_+ TEMP RANGE -40°C to +85°C -40°C to +85°C -40°C to +85°C -40°C to +85°C PINPACKAGE 16 TQFN-EP* 16 TQFN-EP* 12 TQFN-EP* 12 TQFN-EP* PKG CODE T1633-4 T1633-4 T1233-1 T1233-1
Applications
Battery-Powered Systems (Single-Cell Li+ or Multicell NiMH, NiCd, Alkaline) Cell Phones/Cordless Phones Pagers Portable Medical Devices PDAs Electronic Toys MP3 Players
Ordering Information continued at end of data sheet. +Denotes lead-free package. *EP = Exposed paddle. 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.
Selector Guide
PART MAX6782TE_+ MAX6783TE_+ MAX6784TC_+ MAX6785TC_+ MAX6786TA+ MAX6787TA+ MAX6788TA+ MAX6789TB+ MAX6790TB+ MONITOR LEVEL 4 4 3 3 2 2 2 4 4 LBO OUTPUT Quad Quad Triple Triple Dual Dual Dual — — OV — — — — — — — Single Single OV — — — — — — — Single Single OUTPUT TYPE Push-Pull Open Drain Push-Pull Open Drain Push-Pull Open Drain Push-Pull/Open Drain Push-Pull Open Drain HYSTERESIS Fixed/Adj Fixed/Adj Fixed/Adj Fixed/Adj Adj Adj Adj — —
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.
________________________________________________________________ Maxim Integrated Products 1
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.
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Low-Power, 1% Accurate, Dual-/Triple-/Quad-Level Battery Monitors in Small TDFN and TQFN Packages MAX6782–MAX6790
ABSOLUTE MAXIMUM RATINGS
(All voltages referenced to GND.) BATT.........................................................................-0.3V to +6V IN1–IN4, LBH1, LBL1, LBH2, LBL2 ..................-0.3V to Min ((VBATT + 0.3V) and +6V) HADJ1–HADJ4, REF .......-0.3V to Min ((VBATT + 0.3V) and +6V) LBO1–LBO4 (push-pull) ..-0.3V to Min ((VBATT + 0.3V) and +6V) LBO1–LBO4 (open drain).........................................-0.3V to +6V Input Current (all pins) ........................................................20mA Output Current (all pins) .....................................................20mA Continuous Power Dissipation (TA = +70°C) 8-Pin TDFN (derate 23.8mW/°C above +70°C) ..........1905mW 10-Pin TDFN (derate 24.4mW/°C above +70°C) ........1951mW 12-Pin Thin QFN (derate 16.7mW/°C above +70°C) ..1333mW 16-Pin Thin QFN (derate 20.8mW/°C above +70°C) ..1667mW Operating Temperature Range ...........................-40°C to +85°C Junction Temperature ………………………………………+150°C Storage Temperature Range .............................-65°C to +150°C Lead Temperature (soldering, 10s) .................................+300°C
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the d.