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TPS6281xM, Extended Temperature, 2.75-V to 6-V Adjustable-Frequency Step-Down DC/DC Converter
SLVSFM8
March 2021
TPS62810M
,
TPS62811M
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TPS62812M
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TPS62813M
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TPS6281xM, Extended Temperature, 2.75-V to 6-V Adjustable-Frequency Step-Down DC/DC Converter
1
Features
2
Applications
3
Description
4
Revision History
5
Device Comparison Table
6
Pin Configuration and Functions
7
Specifications
7.1
Absolute Maximum Ratings
7.2
ESD Ratings
7.3
Recommended Operating Conditions
7.4
Thermal Information
7.5
Electrical Characteristics
7.6
Typical Characteristics
8
Parameter Measurement Information
8.1
Schematic
9
Detailed Description
9.1
Overview
9.2
Functional Block Diagram
9.3
Feature Description
9.3.1
Precise Enable
9.3.2
COMP/FSET
9.3.3
MODE/SYNC
9.3.4
Spread Spectrum Clocking (SSC)
9.3.5
Undervoltage Lockout (UVLO)
9.3.6
Power Good Output (PG)
9.3.7
Thermal Shutdown
9.4
Device Functional Modes
9.4.1
Pulse Width Modulation (PWM) Operation
9.4.2
Power Save Mode Operation (PWM/PFM)
9.4.3
100% Duty-Cycle Operation
9.4.4
Current Limit and Short Circuit Protection
9.4.5
Foldback Current Limit and Short Circuit Protection
9.4.6
Output Discharge
9.4.7
Soft Start/Tracking (SS/TR)
10
Application and Implementation
10.1
Application Information
10.1.1
Programming the Output Voltage
10.1.2
Inductor Selection
10.1.3
Capacitor Selection
10.1.3.1
Input Capacitor
10.1.3.2
Output Capacitor
10.2
Typical Application
10.2.1
Design Requirements
10.2.2
Detailed Design Procedure
10.2.3
Application Curves
10.3
System Examples
10.3.1
Voltage Tracking
10.3.2
Synchronizing to an External Clock
11
Power Supply Recommendations
12
Layout
12.1
Layout Guidelines
12.2
Layout Example
13
Device and Documentation Support
13.1
Device Support
13.1.1
Third-Party Products Disclaimer
13.2
Documentation Support
13.2.1
Related Documentation
13.3
Receiving Notification of Documentation Updates
13.4
Support Resources
13.5
Trademarks
13.6
Electrostatic Discharge Caution
13.7
Glossary
14
Mechanical, Packaging, and Orderable Information
IMPORTANT NOTICE
Package Options
Mechanical Data (Package|Pins)
RWY|9
MPQF509B
Thermal pad, mechanical data (Package|Pins)
RWY|9
QFND653
Orderable Information
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slvsfm8_pm
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DATA SHEET
TPS6281xM, Extended Temperature, 2.75-V to 6-V Adjustable-Frequency Step-Down DC/DC Converter
1
Features
Functional Safety-Capable
Documentation available to aid functional safety system design
Extended junction temperature from –55°C to +150°C
Input voltage range: 2.75 V to 6 V
Family of 1-A, 2-A, 3-A, and 4-A converters
Quiescent current: 15 µA typical
Output voltage from 0.6 V to 5.5 V
Output voltage accuracy ±1% (FPWM operation)
Adjustable soft start
Start-up at –55°C
Forced PWM or PWM and PFM operation
Adjustable switching frequency of
1.8 MHz to 4 MHz
Precise ENABLE input allows
User-defined undervoltage lockout
Exact sequencing
100% duty cycle mode
Active output discharge
Spread spectrum clocking - optional
Power good output with window comparator
Package with wettable flanks
2
Applications
Aircraft electrical power
Defense radio
Seeker front end
In-flight entertainment
Rail transport