MAX6775MAX6781 19-3774 Rev 4 5/09 Low-Power, 1%-Accurate Battery Monitors in DFN and SC70 Packages General Description Features The MAX6775MAX6781 low-power, 1%-accurate bat- 1.0%-Accurate Threshold Specified Over tery monitors are available in the ultra-small DFN Temperature package (1.0mm x 1.5mm) and SC70 packages. These Single/Dual, Low-Battery Output Options low-power devices are ideal for monitoring single lithi- Low 3A Battery Current um-ion (Li+) cells, or multicell alkaline/NiCd/NiMH power sources. These devices offer single (MAX6775/ Open-Drain or Push-Pull Low-Battery Outputs MAX6776/MAX6777/MAX6778) or dual (MAX6779/ Fixed or Adjustable Hysteresis MAX6780/MAX6781) low-battery outputs and feature Low-Input Leakage Current Allows Use of Large fixed or resistor-adjustable hysteresis. Hysteresis elimi- Resistors nates the output chatter sometimes associated with bat- tery voltage monitors, usually due to input-voltage noise Guaranteed Valid Low-Battery-Output Logic State or battery terminal voltage recovery after load removal. Down to V = 1V BATT These devices are available in several versions: with Immune to Short Battery Transients single- or dual-voltage monitors, and with fixed or Fully Specified from -40C to +85C adjustable hysteresis. The MAX6775/MAX6776 offer a Small 5-Pin SC70 or Ultra-Small 6-Pin DFN single battery monitor and factory-set hysteresis of (1mm x 1.5mm) Package 0.5%, 5%, or 10%. The MAX6779/MAX6780/MAX6781 have two battery monitors in a single package and fac- Ordering Information tory-set hysteresis of 0.5%, 5%, or 10%. The MAX6777/ MAX6778 offer a single battery monitor with external PART TEMP RANGE PIN-PACKAGE inputs for the rising and falling thresholds, allowing MAX6775XK +T -40C to +85C 5 SC70 external hysteresis control. MAX6775LT +T -40C to +85C 6 DFN For convenient interface with system power circuitry or MAX6776XK +T -40C to +85C 5 SC70 microprocessors, both open-drain and push-pull out- puts are available. The single-channel devices are MAX6776LT +T -40C to +85C 6 DFN available with open-drain or push-pull outputs. The MAX6777XK+T -40C to +85C 5 SC70 dual-channel devices are available with both outputs MAX6777LT+T -40C to +85C 6 DFN open-drain, both outputs push-pull, or one of each Ordering Information continued at end of data sheet. (see the Selector Guide). This family of devices is +Denotes a lead(Pb)-free/RoHS-compliant package. offered in small 5-pin SC70 and ultra-small 6-pin DFN T = Tape and reel. packages, and is fully specified over the -40C to MAX6775/MAX6776/MAX6779/MAX6780/MAX6781 are available +85C extended temperature range. with factory-trimmed hysteresis. Specify trim by replacing with A for 0.5%, B for 5%, or C for 10% hysteresis. Typical Operating Circuit Applications Battery-Powered Systems (Single-Cell Li+ or Multicell NiMH, NiCd, Alkaline) Cell Phones/Cordless Phones Pagers BATT IN Portable Medical Devices DC-DC MAX6775 CONVERTER PDAs 3.6V LBI LBO SHDN OUT Electronic Toys MP3 Players Pin Configurations appear at end of data sheet. Maxim Integrated Products 1 For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642, or visit Maxims website at www.maxim-ic.com.Low-Power, 1%-Accurate Battery Monitors in DFN and SC70 Packages ABSOLUTE MAXIMUM RATINGS BATT to GND............................................................-0.3V to +6V Continuous Power Dissipation (T = +70C) A LBI, LBL, LBH, LBI1, LBI2 to GND...............-0.3V to minimum of 5-Pin SC70 (derate 3.1mW/C above +70C)..............247mW ((V + 0.3V) and +6V) 6-Pin DFN (derate 2.1mWC above +70C) ..............168mW BATT LBO, LBO1, LBO2 to GND (open-drain) .................-0.3V to +6V Junction Temperature......................................................+150C LBO, LBO1, LBO2 to GND (push-pull).........-0.3V to minimum of Storage Temperature Range .............................-65C to +150C ((V + 0.3V) and +6V) Lead Temperature (soldering, 10s) .................................+300C BATT Input Current (all pins) ........................................................20mA Output Current (all pins) .....................................................20mA 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. ELECTRICAL CHARACTERISTICS (V = 1.6V to 5.5V, T = -40C to +85C, unless otherwise specified. Typical values are at T = +25C.) (Note 1) BATT A A PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS T = 0C to +70C 1.0 5.5 A Operating Voltage Range V V BATT (Note 2) T = -40C to +85C 1.2 5.5 A V = 3.7V, no load 4 7 BATT Supply Current I A Q V = 1.8V, no load 3.2 6 BATT FIXED HYSTERESIS (MAX6775/MAX6776/MAX6779/MAX6780/MAX6781) 0.5% hysteresis version 1.2037 1.2159 1.2280 LBI, LBI Falling Threshold V V LBIF 5% hysteresis version 1.1493 1.1609 1.1725 (Note 3) 10% hysteresis version 1.0888 1.0998 1.1108 LBI Rising Threshold V 1.2098 1.222 1.2342 V LBIR LBI Input Leakage Current 0.2V V V - 0.2V -5 +5 nA LBI BATT ADJUSTABLE HYSTERESIS (MAX6777/MAX6778) LBL, LBH Threshold V = 1.8V to 5.5V 1.2098 1.222 1.2342 V BATT LBL, LBH Input Leakage Current V - 0.2V V 0.2V -5 +5 nA BATT LBL/LBH 2 MAX6775MAX6781