CAT808 Datasheet, PDF (1/8 Pages) Catalyst Semiconductor – Low-Power Precision Voltage Detector

Low-Power Precision Voltage Detector
CAT808
FEATURES
„ Ultra Low Current Consumption 2.4µA
„ Accurate Voltage Detection Threshold
„ Fine Voltage Detection Threshold Resolution
„ Active Low Open Drain Output
„ Available in 5-pin TSOT- 23 and 3-pin SOT- 89
RoHS compliant packages
„ Industrial temperature range -40°C to +85°C
APPLICATIONS
„ Battery-Powered Systems
„ Power Supply Monitoring
„ Handheld and Portable Equipment
„ Processor Supervisor Reset
DESCRIPTION
The CAT808 is a high-precision voltage detector
designed for monitoring single cell and multi-cell batteries.
Voltage detection thresholds between 2.0V and 3.2V are
provided with 0.1V resolution and ±3.0% accuracy.
The CAT808 open-drain output is active low until the
V_DD voltage exceeds the detection threshold. A low
hysteresis is built into the device to minimize output
“chatter”, while V_DD passes through the detection
threshold, and the output transitions high.
After the CAT808 asserts the output high condition, it
continues to monitor V_DD until it drops below the
detection threshold, when the output goes low until
V_DD once again exceeds the detection threshold.
For Ordering Information details, see page 7.
PIN CONFIGURATION
TYPICAL APPLICATION
SOT-89
OUT 1
V_DD 2
GND 3
5-Lead Thin SOT-23
OUT 1
V_DD 2
GND 3
5 NC
Battery
Voltage
4 NC
V_DD
CAT808
OUT
GND
IN
DC-DC
10kΩ ^CONVERTER
SHDN OUT
GND
Note: The value of the pull-up resistor is not critical
© 2006 Catalyst Semiconductor, Inc.
1
Characteristics subject to change without notice
Doc. No. 3024 Rev. A