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 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.
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
Features
1.0%-Accurate Threshold Specified Over
Temperature
Single/Dual, Low-Battery Output Options
Low 3μA Battery Current
Open-Drain or Push-Pull Low-Battery Outputs
Fixed or Adjustable Hysteresis
Low-Input Leakage Current Allows Use of Large
Resistors
Guaranteed Valid Low-Battery-Output Logic State
Down to V
BATT
= 1V
Immune to Short Battery Transients
Fully Specified from -40°C to +85°C
Small 5-Pin SC70 or Ultra-Small 6-Pin μDFN
(1mm x 1.5mm) Package
M
Low-Power, 1%-Accurate Battery
Monitors in μDFN and SC70 Packages
________________________________________________________________
Maxim Integrated Products
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.
1
Ordering Information
LBI
3.6V
LBO
BATT
MAX6775
SHDN
OUT
DC-DC
CONVERTER
IN
Typical Operating Circuit
19-3774; Rev 2; 1/06
Ordering Information continued at end of data sheet.
+
Denotes lead-free package.
*
Future product—contact factory for availability.
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.
Pin Configurations appear at end of data sheet.
PART
TEMP RANGE
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
PIN-PACKAGE
5 SC70-5
6 μDFN-6
5 SC70-5
6 μDFN-6
5 SC70-5
6 μDFN-6
MAX6775
XK_+T
MAX6775LT_+T*
MAX6776
XK_+T
MAX6776LT_+T
MAX6777
XK+T
MAX6777LT+T