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TPS3890 Datasheet, PDF (1/6 Pages) Texas Instruments – Low Quiescent Current, 1% Accurate Supervisor with Programmable Delay | |||
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TPS3890
SLVSD65 â MARCH 2016
TPS3890 Low Quiescent Current, 1% Accurate Supervisor with Programmable Delay
1 Features
â¢1 Power-On Reset Generator with Adjustable Delay
Time: 40 μs to 30 s
⢠Very Low Quiescent Current: 2.1 μA (Typical)
⢠High Threshold Accuracy: 0.5% (Typical)
⢠Fixed Threshold Voltages:
â Standard Voltage Rails From 1.2 V to 3.3 V
â Adjustable Voltage Down to 1.15 V
⢠Manual Reset (MR) Input
⢠Open-Drain RESET Output
⢠Temperature Range: â40°C to +125°C
⢠Package: Very Small 1.5-mm à 1.5-mm WSON
2 Applications
⢠DSP or Microcontroller Applications
⢠Notebook, Desktop Computers
⢠Smartphones, Hand-Held Products
⢠FPGA, ASIC Applications
⢠Portable, Battery-Powered Products
3 Description
The TPS3890 is a low-quiescent voltage supervisor
that monitors system voltages from 1.2 V to 3.3 V,
asserting an open-drain RESET signal when the
SENSE voltage drops below a preset threshold or
when the manual reset (MR) pin drops to a logic low.
The RESET output remains low for the user-
adjustable delay time after the SENSE voltage and
manual reset (MR) return above the respective
thresholds. The TPS3890 device uses a precision
reference to achieve 0.5% threshold accuracy. The
reset delay time can be user-adjusted between 40 μs
and 30 s by connecting the CT pin to an external
capacitor. The TPS3890 has a very low typical
quiescent current of 2.1 μA, making the device well-
suited to battery-powered applications. The device is
fully specified over a temperature range of â40°C to
+125°C (TJ).
Device Information(1)
PART NUMBER
PACKAGE
BODY SIZE (NOM)
TPS3890
WSON (6)
1.50 mm à 1.50 mm
(1) For all available packages, see the orderable addendum at
the end of the data sheet.
Typical Application Circuit
1.8 V
1.2 V
VDD
SENSE
TPS389012
MR
RESET
CT
GND
VCORE
VI/O
Microcontroller
RESET
GND
1
An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,
intellectual property matters and other important disclaimers. PRODUCT PREVIEW Information. Product in design phase of
development. Subject to change or discontinuance without notice.
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