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Temperature (qC)
Accuracy (%)
-50 -25 0 25 50 75 100 125
-0.75
-0.5
-0.25
0
0.25
0.5
0.75
D001
Unit 1
Unit 2
Unit 3
Unit 4
Unit 5
Avg
TPS389012-Q1
RESET
VDD
GND
SENSE
1.8 V
Microcontroller
MR
1.2 V
V
CORE
V
I/O
RESET
C
T
GND
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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. PRODUCTION DATA.
TPS3890-Q1
SBVS303 –MARCH 2017
TPS3890-Q1
Low Quiescent Current, 1% Accurate Supervisor with Programmable Delay
1
1 Features
1
• Qualified for Automotive Applications
• Power-On-Reset (POR) Generator with Adjustable
Delay Time: 25 μs to 30 s
• Very Low Supply Current: 2.1 μA (Typical)
• High Threshold Accuracy: 1% (max)
• Precision Hysteresis
• Fixed and Adjustable Threshold Voltages:
– Fixed Thresholds for Standard Rails:
1.2 V to 3.3 V
– Adjustable Down to 1.15 V
• Manual Reset (MR) Input
• Open-Drain RESET Output
• Temperature Range: –40°C to +125°C
• Package: 1.5-mm × 1.5-mm WSON
2 Applications
• Automotive Vision Systems
• Automotive RADAR Systems
• Automotive Infotainment Systems
• Body Electronics
• Cluster Electronics
3 Description
The TPS3890-Q1 is a precision voltage supervisor
with low-quiescent current that monitors system
voltages as low as 1.15 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-Q1 family uses
a precision reference to achieve 1% threshold
accuracy. The reset delay time can be user-adjusted
between 25 μs and 30 s by connecting the CT pin to
an external capacitor. The TPS3890-Q1 has a very
low quiescent current of 2.1 μA and is available in a
small 1.5-mm × 1.5-mm package, making the device
well-suited for battery-powered and space-
constrained applications. The device is fully specified
over a temperature range of –40°C to +125°C (T
J
).
Device Information
(1)
PART NUMBER PACKAGE BODY SIZE (NOM)
TPS3890-Q1 WSON (6) 1.50 mm × 1.50 mm
(1) For all available packages, see the orderable addendum at
the end of the data sheet.
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Typical Application Circuit
V
ITN
Accuracy vs Temperature
