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Texas Instruments TPS3801 Manuals
Manuals and User Guides for Texas Instruments TPS3801. We have
1
Texas Instruments TPS3801 manual available for free PDF download: Application Report
Texas Instruments TPS3801 Application Report (28 pages)
Smallest SVS For MOnitoring DSPs and Processors
Brand:
Texas Instruments
| Category:
Computer Hardware
| Size: 0.19 MB
Table of Contents
Table of Contents
3
Introduction
5
Circuit Description
6
Overview of Features
6
Supervised Supply Voltages
6
Features Overview
6
Terminals
7
Terminal Functions
7
Block Diagram
7
Terminal Assignment
7
The Nominal Supply Voltages and Their Threshold Voltages
7
Basic Timings
8
Block Diagram of TPS3801 and TPS3809
8
Typical Values of Internal Voltage Divider
8
Timing Diagram of TPS3801
9
Voltage Supervision at the VDD Terminal
10
Functional Description
10
Relations between
10
And Vhys
10
DD Terminal
10
Measurement of a Voltage Drop on the Supply Line
11
Measurement Circuit for Measuring the Reaction of a Voltage Drop
11
The Specified Values of
11
Threshold Overdrive Versus Pulsewidth
12
Measurement of the Voltage Drop at
12
Breakdown Voltage Versus Pulsewidth at a Tps380Xi50
13
Breakdown Voltage Versus Pulsewidth at a Tps380Xj25
13
Making the Supervisor Circuit Less Sensitive
14
TPS3801 with a Low Pass Filter at
14
Breakdown Voltage Versus Pulsewidth with a Low Pass Filter
14
Manual Reset
15
Functional Description
15
A Measurement of Low Pulse at the Manual Reset Input
15
Minimum Conditions for Triggering a Manual Reset
15
Reset Pulse, Triggered by Manual Reset
15
Saving Current While Using the Manual Reset Function
16
Current Flow off the Manual Reset Input
16
Lateral Current from VDD to GND
16
Minimum Conditions for Triggering a Reset at Manual Reset Input
16
Internal Realization of the Manual Reset Circuit
16
Lateral Current in Dependence of the Voltage at a CMOS Input Stage
17
Applications
18
A TPS3801 Supervises a DSP
18
Switching the Power Supply with a TPS3801
18
TPS3801 Supervises the TMS320LC542-DSP
18
System Power Control with the TPS3801
19
Keeping a Low Signal at Reset Output for Voltages below 1.1
20
Measurements of Switching Power with a TPS2051
20
An Additional Resistor Ensures a Valid Reset down to 0 V
20
Supervising a Customer Defined Threshold Voltage
21
Threshold Voltage Change Application 1
21
Higher Accuracy Supervision
22
Measurement Plot of the 3.6 V Voltage Supervision
22
Worst Case Considerations for Application 1
23
Threshold Voltage Change Application 2
23
Worst Case Considerations for Application 2
24
Supervision of 3.6 V with Less Current Consumption
24
Mechanical Data and Layout Considerations
25
Mechanical Data
25
Linear Dimensions of SOT323 Package
25
Linear Dimensions of SOT23-3 Package
25
Layout Considerations
26
Layout Suggestion Using a TPS3801
26
Layout Suggestion Using a TPS3809
26
Summary
27
References
27
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