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TPS6244x-Q1 2.75-V to 6-V Dual Step-Down Converter with Adjustable Frequency in a QFN Package
SLUSDN9B
November 2021 – July 2022
TPS62441-Q1
,
TPS62442-Q1
PRODUCTION DATA
CONTENTS
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TPS6244x-Q1 2.75-V to 6-V Dual Step-Down Converter with Adjustable Frequency in a QFN Package
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
Timing Requirements
7.7
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 (EN)
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 and 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
10
Application and Implementation
10.1
Application Information
10.1.1
Programming the Output Voltage
10.1.2
External Component Selection
10.1.2.1
Inductor Selection
10.1.2.2
Capacitor Selection
10.1.2.2.1
Input Capacitor
10.1.2.2.2
Output Capacitor
10.2
Typical Application
10.2.1
Design Requirements
10.2.2
Detailed Design Procedure
10.2.3
Application Curves
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)
RQR|14
MPQF624
Thermal pad, mechanical data (Package|Pins)
RQR|14
QFND745
Orderable Information
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DATA SHEET
TPS6244x-Q1 2.75-V to 6-V Dual Step-Down Converter with Adjustable Frequency in a QFN Package
1
Features
AEC-Q100-qualified for automotive applications
Device temperature grade 1:
–40°C to +125°C T
A
Functional Safety-Capable
Documentation available to aid functional safety system design
Input voltage range: 2.75 V to 6 V
Dual-channel output, output voltage from 0.6 V to 5.5 V
Output voltage accuracy ±1% (PWM operation)
Forced PWM or PWM and PFM operation
Adjustable switching frequency of
1.8 MHz to 4 MHz
Two precise ENABLE inputs allow:
User-defined undervoltage lockout
Exact sequencing
Two power-good outputs with window comparator
180° phase shifted operation
100% duty cycle mode
Active output discharge
Optional spread spectrum clocking
Optional foldback overcurrent protection
T
J
= –40°C to +150°C
2.3-mm × 2.7-mm QFN package with wettable flanks
2
Applications
ADAS camera
and
ADAS sensor fusion
Surround view ECU
Hybrid
and
reconfigurable cluster
Infotainment head unit
and
digital cockpit
Telematics control unit