TPS3806J20_15 Datasheet, PDF (1/14 Pages) Texas Instruments – Dual Voltage Detector with Adjustable Hysteresis

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TPS3806J20
TPS3806I33
SLVS393A – JULY 2001 – REVISED NOVEMBER 2004
Dual Voltage Detector with Adjustable Hysteresis
FEATURES
• Dual Voltage Detector With Adjustable
Hysteresis 3.3-V/Adjustable and
2-V/Adjustable
• Assured Reset at V_DD = 0.8 V
• Supply Current: 3 µA Typical at V_DD = 3.3 V
• Independent Open-Drain Reset Outputs
• Temperature Range: -40°C to +85°C
• 6-Pin SOT-23 Package
DESCRIPTION
The TPS3806 integrates two independent voltage
detectors for battery voltage monitoring. During
power-on, RESET and RSTSENSE are asserted
when supply voltage V_DD or the voltage at LSENSE
input become higher than 0.8 V. Thereafter, the
supervisory circuit monitors V_DD and LSENSE, keep-
ing RESET and RSTSENSE active as long as V_DD
and LSENSE remain below the threshold voltage, V_IT.
As soon as V_DD or LSENSE rise above the threshold
voltage V_IT, RESET or RSTSENSE is deasserted,
respectively. The TPS3806 device has a fixed-sense
threshold voltage V_IT set by an internal voltage divider
at V_DD and an adjustable second-LSENSE input. In
addition, an upper voltage threshold can be set at
HSENSE to allow a wide adjustable
hysteresis window.
The devices are available in a 6-pin SOT-23 pack-
age. The TPS3806 device is characterized for oper-
ation over a temperature range of -40°C to +85°C.
TPS3806
DBV PACKAGE
(TOP VIEW)
RSTSENSE ¹
6 HSENSE
GND 2
5 _LSENSE
RESET ³
4
V_DD
3.6 V
Li-lon
Cell
V_DD
RESET
R1
TPS3806I33
LSENSE RSTSENSE
R2
HSENSE
GND
R3
R4 R5
Typical Operating Circuit
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas
Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
Copyright © 2001–2004, Texas Instruments Incorporated