Supervisor. TPS3837 Datasheet

TPS3837 Datasheet PDF


Part

TPS3837

Description

Nano Power Voltage Supervisor

Manufacture

etcTI

Page 29 Pages
Datasheet
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TPS3837 Datasheet
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TPS3836, TPS3837, TPS3838
SLVS292F – JUNE 2000 – REVISED SEPTEMBER 2019
TPS383x Nano Power Voltage Supervisor With Selectable Reset Delay
1 Features
1 Supply current: 220 nA (typical)
• Precision supply voltage supervision range:
1.8 V, 2.5 V, 3.0 V, and 3.3 V
• Power-on reset generator with selectable delay
time: 10 ms or 200 ms
• Push and pull RESET output (TPS3836),
Push and pull RESET output (TPS3837), or open-
drain RESET output (TPS3838)
• Manual reset
• 5-pin SOT23 and 2-mm × 2-mm, 6-pin SON
packages
• Temperature range: –40°C to 85°C
2 Applications
• Applications using low-power DSPs,
microcontrollers, or microprocessors
• Portable- and battery-powered equipment
• Intelligent instruments
• Wireless communication systems
• Notebook computers
• Applications using the MSP430™
• For automotive systems, see TPS383x-Q1
3 Description
The TPS3836, TPS3837, and TPS3838 device
families of supervisory circuits provide circuit
initialization and timing supervision, primarily for
digital signal processors (DSP) and processor-based
systems.
During power-on, RESET is asserted when the
supply voltage VDD becomes higher than 1.1 V.
Thereafter, the supervisory circuit monitors VDD and
keeps the RESET output active as long as VDD
remains below the threshold voltage of VIT. An
internal timer delays the return of the output to the
inactive state (high) to ensure proper system reset.
The delay time starts after VDD rises above the
threshold voltage VIT.
When CT is connected to GND, a fixed delay time of
typically 10 ms is asserted. When connected to VDD,
the delay time is typically 200 ms. When the supply
voltage drops below the threshold voltage VIT, the
output becomes active (low) again. All the devices of
this family have a fixed-sense threshold voltage (VIT)
set by an internal voltage divider.
The TPS3836 has an active-low, push-pull RESET
output. The TPS3837 has an active-high, push-pull
RESET, and the TPS3838 integrates an active-low,
open-drain RESET output. The product spectrum is
designed for supply voltages of 1.8 V, 2.5 V, 3.0 V,
and 3.3 V. The circuits are available in either a
SOT23-5 or a 2-mm × 2-mm SON-6 package. The
TPS3836, TPS3837, and TPS3838 families are
characterized for operation over a temperature range
of –40°C to 85°C.
Device Information(1)
PART NUMBER
PACKAGE
BODY SIZE (NOM)
TPS383x
WSON (6)
SOT (5)
2.00 mm × 2.00 mm
2.90 mm × 1.60 mm
(1) For all available packages, see the orderable addendum at
the end of the data sheet.
Typical Application Circuit
TPS3836K33
VDD
MSP430
VCC
CT
RESET
MR
T GND
RST
VSS
Lithium
Battery
3.6 V
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.

TPS3837 Datasheet
TPS3836, TPS3837, TPS3838
SLVS292F – JUNE 2000 – REVISED SEPTEMBER 2019
www.ti.com
Table of Contents
1 Features .................................................................. 1
2 Applications ........................................................... 1
3 Description ............................................................. 1
4 Revision History..................................................... 2
5 Device Comparison Table..................................... 3
6 Pin Configuration and Functions ......................... 3
7 Specifications......................................................... 4
7.1 Absolute Maximum Ratings ...................................... 4
7.2 Dissipation Ratings .................................................. 4
7.3 ESD Ratings.............................................................. 4
7.4 Recommended Operating Conditions....................... 4
7.5 Thermal Information .................................................. 5
7.6 Electrical Characteristics........................................... 5
7.7 Timing Requirements ................................................ 6
7.8 Switching Characteristics .......................................... 6
7.9 Typical Characteristics .............................................. 7
8 Parameter Measurement Information .................. 8
8.1 Timing Diagram......................................................... 8
9 Detailed Description .............................................. 9
9.1 Overview ................................................................... 9
9.2 Functional Block Diagram ......................................... 9
9.3 Feature Description................................................... 9
9.4 Device Functional Modes........................................ 10
10 Application and Implementation........................ 11
10.1 Application Information.......................................... 11
10.2 Typical Application ............................................... 11
11 Power Supply Recommendations ..................... 13
12 Layout................................................................... 13
12.1 Layout Guidelines ................................................. 13
12.2 Layout Example .................................................... 13
13 Device and Documentation Support ................. 14
13.1 Related Links ........................................................ 14
13.2 Receiving Notification of Documentation Updates 14
13.3 Support Resources ............................................... 14
13.4 Trademarks ........................................................... 14
13.5 Electrostatic Discharge Caution ............................ 14
13.6 Glossary ................................................................ 14
14 Mechanical, Packaging, and Orderable
Information ........................................................... 14
4 Revision History
Changes from Revision E (October 2010) to Revision F
Page
• Changed format to meet latest data sheet standards; changed data sheet title, added Device Information table, Pin
Configurations and Functions, Parameter Measurement Information, Detailed Description, Application and
Implementation, Power Supply Recommendations, Layout, Receiving Notification of Documentation Updates, and
Support Resources sections. Moved existing sections into the new format .......................................................................... 1
• Changed 2x2 WSON to 2-mm × 2-mm WSON in fifth Features bullet .................................................................................. 1
• Changed link to automotive data sheet .................................................................................................................................. 1
• Added full acronym name for DSP to first sentence of Description section .......................................................................... 1
• Changed 2x2 WSON to 2-mm × 2-mm WSON in last paragraph of Description section ...................................................... 1
• Changed Ordering Information table to Device Comparison Table........................................................................................ 3
• Deleted soldering temperature parameter from Absolute Maximum Ratings table ............................................................... 4
• Moved storage temperature range to Absolute Maximum Ratings table ............................................................................... 4
• Changed Handling Ratings table to ESD Ratings .................................................................................................................. 4
• Added Thermal Information table ........................................................................................................................................... 5
• Moved propagation (delay) time maximum values to the TYP column ................................................................................. 6
• Changed propagation times for the high-to-low-level output and low-to-high-level output from: 0.1 µs to: 0.3 µs ................ 6
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Product Folder Links: TPS3836 TPS3837 TPS3838


Features Datasheet pdf Product Folder Order Now Technical Doc uments Tools & Software Support & Com munity TPS3836, TPS3837, TPS3838 SLVS2 92F – JUNE 2000 – REVISED SEPTEMBER 2019 TPS383x Nano Power Voltage Superv isor With Selectable Reset Delay 1 Fea tures •1 Supply current: 220 nA (typi cal) • Precision supply voltage super vision range: 1.8 V, 2.5 V, 3.0 V, and 3.3 V • Power-on reset generator with selectable delay time: 10 ms or 200 ms • Push and pull RESET output (TPS383 6), Push and pull RESET output (TPS3837 ), or opendrain RESET output (TPS3838) • Manual reset • 5-pin SOT23 and 2- mm × 2-mm, 6-pin SON packages • Temp erature range: –40°C to 85°C 2 Appl ications • Applications using low-pow er DSPs, microcontrollers, or microproc essors • Portable- and battery-powere d equipment • Intelligent instruments • Wireless communication systems • Notebook computers • Applications us ing the MSP430™ • For automotive sy stems, see TPS383x-Q1 3 Description The TPS3836, TPS3837, and TPS3838 device families of supervisory .
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