TPS3890_16 Datasheet, PDF (1/25 Pages) Texas Instruments – Low Quiescent Current, 1% Accurate Supervisor with Programmable Delay

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TPS3890
SLVSD65A – MARCH 2016 – REVISED MAY 2016
TPS3890
Low Quiescent Current, 1% Accurate Supervisor with Programmable Delay
1 Features
•1 Power-On-Reset (POR) Generator with Adjustable
Delay Time: 40 μs to 30 s
• Very Low Quiescent 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
• DSPs or Microcontrollers
• FPGAs, ASICs
• Notebooks, Desktop Computers
• Smartphones, Hand-Held Products
• Portable, Battery-Powered Products
• Solid-State Drives
• Set-Top Boxes
• Industrial Control Systems
3 Description
The TPS3890 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 family uses a precision
reference to achieve 1% 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 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
WSON (6)
1.50 mm × 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
MR
TPS389012
RESET
CT
GND
VCORE
VI/O
Microcontroller
RESET
GND
Copyright © 2016, Texas Instruments Incorporated
V_ITN Accuracy vs Temperature
0.75
Unit 1
Unit 3
Unit 5
Unit 2
Unit 4
Avg
0.5
0.25
0
-0.25
-0.5
-0.75
-50 -25
0
25
50
75
Temperature (qC)
100 125
D001
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. PRODUCTION DATA.