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TPS4333x-Q1 Low-IQ, Single-Boost, Dual Synchronous-Buck Controller
SLVSAV6E
June 2011 – December 2015
TPS43335-Q1
,
TPS43336-Q1
PRODUCTION DATA.
CONTENTS
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TPS4333x-Q1 Low-IQ, Single-Boost, Dual Synchronous-Buck Controller
1
Features
2
Applications
3
Description
3.1
Typical Application Diagram
4
Revision History
5
Pin Configuration and Functions
6
Specifications
6.1
Absolute Maximum Ratings
6.2
ESD Ratings
6.3
Recommended Operating Conditions
6.4
Thermal Information
6.5
DC Electrical Characteristics
6.6
Typical Characteristics
7
Detailed Description
7.1
Overview
7.2
Functional Block Diagram
7.3
Feature Description
7.3.1
Buck Controllers: Normal Mode PWM Operation
7.3.1.1
Frequency Selection and External Synchronization
7.3.1.2
Enable Inputs
7.3.1.3
Feedback Inputs
7.3.1.4
Soft-Start Inputs
7.3.1.5
Current-Mode Operation
7.3.1.6
Current Sensing and Current Limit With Foldback
7.3.1.7
Slope Compensation
7.3.1.8
Power-Good Outputs and Filter Delays
7.3.1.9
Light-Load PFM Mode
7.3.2
Boost Controller
7.3.3
Frequency-Hopping Spread Spectrum (TPS43336-Q1 Only)
7.3.4
Gate-Driver Supply (VREG, EXTSUP)
7.3.5
External P-Channel Drive (GC2) and Reverse Battery Protection
7.3.6
Undervoltage Lockout and Overvoltage Protection
7.3.7
Thermal Protection
7.4
Device Functional Modes
7.4.1
Buck Controllers: Current-Mode Operation
7.4.2
Buck Controllers: Light-Load PFM Mode
8
Application and Implementation
8.1
Application Information
8.2
Typical Applications
8.2.1
Automotive Infotainment Supply
8.2.1.1
Design Requirements
8.2.1.2
Detailed Design Procedure
8.2.1.2.1
Boost Component Selection
8.2.1.2.2
Boost Maximum Input Current IIN_MAX
8.2.1.2.3
Boost Inductor Selection, L
8.2.1.2.4
Inductor Ripple Current, IRIPPLE
8.2.1.2.5
Peak Current in Low-Side FET, IPEAK
8.2.1.2.6
Right Half-Plane Zero RHP Frequency, fRHP
8.2.1.2.7
Output Capacitor, COUTx
8.2.1.2.8
Bandwidth of Boost Converter, fC
8.2.1.2.9
Output Ripple Voltage Due to Load Transients, ∆VOUTx
8.2.1.2.10
Selection of Components for Type II Compensation
8.2.1.2.11
Input Capacitor, CIN
8.2.1.2.12
Output Schottky Diode D1 Selection
8.2.1.2.13
Low-Side MOSFET (BOT_SW3)
8.2.1.2.14
BuckA Component Selection
8.2.1.2.14.1
BuckA Component Selection
8.2.1.2.14.2
Current-Sense Resistor RSENSE
8.2.1.2.15
Inductor Selection L
8.2.1.2.16
Inductor Ripple Current IRIPPLE
8.2.1.2.17
Output Capacitor COUTA
8.2.1.2.18
Bandwidth of Buck Converter fC
8.2.1.2.19
Selection of Components for Type II Compensation
8.2.1.2.20
Resistor Divider Selection for Setting VOUTA Voltage
8.2.1.2.21
BuckB Component Selection
8.2.1.2.22
Resistor Divider Selection for Setting VOUT Voltage
8.2.1.2.23
BuckX High-Side and Low-Side N-Channel MOSFETs
8.2.1.3
Application Curves
8.2.2
Automotive ADAS Supply
8.2.2.1
Design Requirements
8.2.2.2
Detailed Design Procedure
9
Power Supply Recommendations
10
Layout
10.1
Layout Guidelines
10.1.1
Grounding and PCB Circuit Layout Considerations
10.1.1.1
Boost converter
10.1.1.2
Buck Converter
10.1.2
Other Considerations
10.2
Layout Example
10.3
Power Dissipation Derating Profile, 38-Pin HTTSOP PowerPAD Package
11
Device and Documentation Support
11.1
Device Support
11.1.1
Third-Party Products Disclaimer
11.2
Documentation Support
11.2.1
Related Documentation
11.3
Related Links
11.4
Community Resources
11.5
Trademarks
11.6
Electrostatic Discharge Caution
11.7
Glossary
12
Mechanical, Packaging, and Orderable Information
IMPORTANT NOTICE
Package Options
Mechanical Data (Package|Pins)
DAP|38
MPDS381A
Thermal pad, mechanical data (Package|Pins)
DAP|38
PPTD158C
Orderable Information
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slvsav6e_pm
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