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TPS62147, TPS62148 High-Accuracy, 3-V to 17-V, 2-A Step-Down Converter with DCS-Control
SLVSDR8B
April 2018 – February 2023
TPS62147
,
TPS62148
PRODUCTION DATA
CONTENTS
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TPS62147, TPS62148 High-Accuracy, 3-V to 17-V, 2-A Step-Down Converter with DCS-Control
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
Power Good (PG)
9.3.3
MODE
9.3.4
Undervoltage Lockout (UVLO)
9.3.5
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 (for TPS62148)
9.4.5
HICCUP Current Limit And Short Circuit Protection (for TPS62147)
9.4.6
Soft Start / Tracking (SS/TR)
9.4.7
Output Discharge Function (TPS62148 only)
9.4.8
Starting into a Pre-Biased Load
10
Application and Implementation
10.1
Application Information
10.1.1
Programming the Output Voltage
10.1.2
External Component Selection
10.1.3
Inductor Selection
10.1.4
Capacitor Selection
10.1.4.1
Output Capacitor
10.1.4.2
Input Capacitor
10.1.4.3
Soft-Start Capacitor
10.1.5
Tracking Function
10.1.6
Output Filter and Loop Stability
10.2
Typical Applications
10.2.1
Typical Application with Adjustable Output Voltage
10.2.1.1
Design Requirements
10.2.1.2
Detailed Design Procedure
10.2.1.3
Application Curves
10.3
System Examples
10.3.1
LED Power Supply
10.3.2
Powering Multiple Loads
10.3.3
Voltage Tracking
10.3.4
Precise Soft-Start Timing
10.4
Power Supply Recommendations
10.5
Layout
10.5.1
Layout Guidelines
10.5.2
Layout Example
10.5.3
Thermal Considerations
11
Device and Documentation Support
11.1
Device Support
11.1.1
Third-Party Products Disclaimer
11.2
Receiving Notification of Documentation Updates
11.3
Support Resources
11.4
Trademarks
11.5
Electrostatic Discharge Caution
11.6
Glossary
12
Mechanical, Packaging, and Orderable Information
IMPORTANT NOTICE
Package Options
Mechanical Data (Package|Pins)
RGX|11
MPQF454
Thermal pad, mechanical data (Package|Pins)
Orderable Information
slvsdr8b_oa
slvsdr8b_pm
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DATA SHEET
TPS62147, TPS62148 High-Accuracy, 3-V to 17-V, 2-A Step-Down Converter with DCS-Control
1
Features
Output voltage accuracy ± 1% over specified T
J
range (PWM mode)
Input voltage range: 3 V to 17 V
Quiescent current 18-µA typical
Output voltage from 0.8 V to 12 V
Adjustable soft start
Forced PWM or PWM/PFM operation
Switching frequency of 1.25 MHz or 2.5 MHz in forced PWM
Precise ENABLE input allows
User-defined undervoltage lockout
Exact sequencing
100% duty cycle mode
Automatic efficiency enhancement AEE
DCS-Control topology
Active output discharge (TPS62148)
HICCUP overcurrent protection (TPS62147)
Power-good output
Available in 2-mm × 3-mm VQFN package
2
Applications
Standard 12-V rail supplies
Mobile and embedded computers
POL supply from multiple batteries
Factory automation, PLC, industrial PC
Building automation, video surveillance
