TPS3807A30 Datasheet, PDF (1/13 Pages) Texas Instruments – Low Quiescent Current, Dual-Channel Supervisory Circuit

TPS3807
www.ti.com
SBVS061B – AUGUST 2005 – REVISED DECEMBER 2006
Low Quiescent Current, Dual-Channel Supervisory Circuit
FEATURES
• Two Supply Monitors in One Package
• One Monitor with Fixed High-Accuracy
Thresholds for System Supply Monitoring
• Second Monitor with Variable Threshold and
30mV Hysteresis to Provide Failsafe
• Very Low Quiescent Current: 3.5µA typ
• High Threshold Accuracy: 1% max
(0°C to +85°C)
• Open-Drain Reset Outputs
• Temperature Range: –40°C to +85°C
• Ultra-Small SC70-5 Package
APPLICATIONS
• DSP, Microcontroller, or Microprocessor
Applications Requiring User-Selected Delay
Times
• Notebook/Desktop Computers
• PDAs and SmartPhones
• Other Hand-Held Products
• Portable, Battery-Powered Products
• FPGA/ASIC Applications
DESCRIPTION
The TPS3807 family microprocessor supervisory
circuits monitor system voltages as low as 1.225V.
These devices assert an open-drain RSTVDD signal
when the V_DD voltage drops below a preset
threshold. The RSTVDD output remains asserted
until the V_DD voltage returns above its threshold. The
device also provides an additional RSTSENSE
output for a SENSE input with adjustable thresholds
and hysteresis.
The TPS3807 uses a precision reference to achieve
1% threshold accuracy. The TPS3807 has a very low
typical quiescent current of 3.5µA, so it is well-suited
to battery-powered applications. It is available in a
small SC70-5 package, which is half the size of a
SOT-23 package, and is fully specified over a
temperature range of –40°C to +85°C.
Supply 2
V_DD
RSTVDD
Battery
TPS3807
SENSE
RSTSENSE
GND
System Supply
Battery Enable
Battery Good
DCK Package
SC70−5
(Top View)
RSTSENSE 1
GND 2
RSTVDD 3
TPS3807
5 SENSE
4 V_DD
Typical Application Circuit
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PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of the Texas
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necessarily include testing of all parameters.
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