SLVSD01B
September 2015 – May 2019
TPS57140-EP
PRODUCTION DATA.
1
Features
2
Applications
3
Description
Device Images
Simplified Schematic
Efficiency vs Load Current
4
Revision History
5
Pin Configuration and Functions
Pin Functions
6
Specifications
6.1
Absolute Maximum Ratings
6.2
ESD Ratings
6.3
Recommended Operating Conditions
6.4
Thermal Information
6.5
Electrical Characteristics
6.6
Typical Characteristics
7
Detailed Description
7.1
Overview
7.2
Functional Block Diagram
7.3
Feature Description
7.3.1
Fixed Frequency PWM Control
7.3.2
Slope-Compensation Output Current
7.3.3
Bootstrap Voltage (Boot)
7.3.4
Low-Dropout Operation
7.3.5
Error Amplifier
7.3.6
Voltage Reference
7.3.7
Adjusting the Output Voltage
7.3.8
Enable and Adjusting UVLO
7.3.9
Slow-Start or Tracking Pin (SS/TR)
7.3.10
Overload Recovery Circuit
7.3.11
Constant Switching Frequency and Timing Resistor (RT/CLK Pin)
7.3.12
Overcurrent Protection and Frequency Shift
7.3.13
Selecting the Switching Frequency
7.3.14
How to Interface to RT/CLK Pin
7.3.15
Power Good (PWRGD Pin)
7.3.16
Overvoltage Transient Protection (OVTP)
7.3.17
Thermal Shutdown
7.3.18
Small-Signal Model for Loop Response
7.3.19
Simple Small-Signal Model for Peak-Current-Mode Control
7.3.20
Small-Signal Model for Frequency Compensation
7.4
Device Functional Modes
7.4.1
Sequencing
7.4.2
Pulse-Skip Eco-mode Control Scheme
8
Application and Implementation
8.1
Application Information
8.2
Typical Application
8.2.1
Design Requirements
8.2.2
Detailed Design Procedure
8.2.2.1
Selecting the Switching Frequency
8.2.2.2
Output Inductor Selection (LO)
8.2.2.3
Output Capacitor
8.2.2.4
Catch Diode
8.2.2.5
Input Capacitor
8.2.2.6
Slow-Start Capacitor
8.2.2.7
Bootstrap Capacitor Selection
8.2.2.8
UVLO Set Point
8.2.2.9
Output Voltage and Feedback Resistors Selection
8.2.2.10
Compensation
8.2.3
Application Curves
9
Power Supply Recommendations
10
Layout
10.1
Layout Guidelines
10.2
Layout Example
10.3
Power-Dissipation Estimate
11
Device and Documentation Support
11.1
Receiving Notification of Documentation Updates
11.2
Community Resources
11.3
Trademarks
11.4
Electrostatic Discharge Caution
11.5
Glossary
12
Mechanical, Packaging, and Orderable Information
Package Options
Mechanical Data (Package|Pins)
DRC|10
MPDS117L
Thermal pad, mechanical data (Package|Pins)
DRC|10
QFND013N
Orderable Information
slvsd01b_oa
slvsd01b_pm
8.2
Typical Application
Figure 52.
High-Frequency, 3.3-V Output Power-Supply Design With Adjusted UVLO