SLUSAE6B
December 2010 – November 2023
TPS53315
PRODUCTION DATA
1
1
Features
2
Applications
3
Description
4
Pin Configuration and Functions
5
Specifications
5.1
Absolute Maximum Ratings
5.2
ESD Ratings
5.3
Recommended Operating Conditions
5.4
Thermal Information
5.5
Electrical Characteristics
5.6
Typical Characteristics
6
Detailed Description
6.1
Overview
6.2
Functional Block Diagram
6.3
Feature Description
6.3.1
D-CAP™ Integrated Circuit with Adaptive On-Time
6.3.2
Small Signal Model
6.3.3
Ramp Signal
6.3.4
Auto-Skip Eco-mode Light Load Operation
6.3.5
Adaptive Zero Crossing
6.3.6
Forced Continuous Conduction Mode
6.3.7
Power Good
6.3.8
Current Sense and Overcurrent Protection
6.3.9
Overvoltage and Undervoltage Protection
6.3.10
UVLO Protection
6.3.11
Thermal Shutdown
6.4
Device Functional Modes
6.4.1
Enable and Soft Start
7
Application and Implementation
7.1
Application Information
7.2
Typical Application
7.2.1
Typical Application Circuit Diagram
7.2.1.1
Design Requirements
7.2.1.2
Detailed Design Procedure
7.2.1.2.1
Step 1: Select Operation Mode and Soft-Start Time
7.2.1.2.2
Step 2: Select Switching Frequency
7.2.1.2.3
Step 3: Select the Inductance
7.2.1.2.4
Step 4: Select Output Capacitors
7.2.1.2.5
Step 5: Determine the Voltage-Divider Resistance (R1 and R2)
7.2.1.2.6
Step 6: Select the Overcurrent Resistance (RTRIP)
7.2.1.3
Application Curves
7.2.2
Typical Application Circuit Diagram With Ceramic Output Capacitors
7.2.2.1
Design Requirements
7.2.2.2
Detailed Design Procedure
7.2.2.2.1
Step 1: Select Operation Mode and Soft-Start Time
7.2.2.2.2
Step 2: Select Switching Frequency
7.2.2.2.3
Step 3: Select the Inductance
7.2.2.2.4
Step 4: Select Output Capacitance for Ceramic Capacitors
7.2.2.2.5
Step 5: Select the Overcurrent Setting Resistance (RTRIP)
7.2.2.3
External Component Selection When Using All Ceramic Output Capacitors
7.2.2.4
Application Curves
7.3
Power Supply Recommendations
7.4
Layout
7.4.1
Layout Guidelines
7.4.2
Layout Example
7.4.2.1
Thermal Considerations
8
Device and Documentation Support
8.1
Receiving Notification of Documentation Updates
8.2
Support Resources
8.3
Trademarks
8.4
Electrostatic Discharge Caution
8.5
Glossary
9
Revision History
10
Mechanical, Packaging, and Orderable Information
Package Options
Mechanical Data (Package|Pins)
RGF|40
MPQF173F
Thermal pad, mechanical data (Package|Pins)
RGF|40
QFND162J
Orderable Information
slusae6b_oa
slusae6b_pm
1
Features
Conversion input voltage range: 3 V to 15 V
VDD input voltage range: 4.5 V to 25 V
Output voltage range: 0.6 V to 5.5 V
5-V LDO output
Integrated power MOSFETs with 12-A continuous output current
< 10-μA shutdown current
Auto-skip Eco-mode for light-load efficiency
D-CAP integrated circuit with fast transient response
Selectable switching frequency from 250 kHz to 1 MHz with an external resistor
Built-in 1%, 0.6-V reference
0.7-ms, 1.4-ms, 2.8-ms and 5.6-ms selectable internal voltage servo soft start
Pre-charged start-up capability
Integrated boost switch
Adjustable overcurrent limit through external resistor
Overvoltage, undervoltage, UVLO, and overtemperature protection
Support all ceramic output capacitors
Open drain power-good indication
40-pin VQFN package with thermal pad