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
パッケージ・オプション
メカニカル・データ(パッケージ|ピン)
DRC|10
MPDS117L
サーマルパッド・メカニカル・データ
DRC|10
QFND013N
発注情報
slvsd01b_oa
slvsd01b_pm
6.6
Typical Characteristics
Figure 2.
On Resistance vs Junction Temperature
Figure 4.
Switch Current Limit vs Junction Temperature
Figure 6.
Switching Frequency vs RT/CLK Resistance, High-Frequency Range
Figure 8.
EA Transconductance During Slow Start vs Junction Temperature
Figure 10.
EN Pin Voltage vs Junction Temperature
Figure 12.
EN Pin Current vs Junction Temperature
Figure 14.
SS/TR Discharge Current vs Junction Temperature
Figure 16.
Shutdown Supply Current vs Junction Temperature
Figure 18.
V
IN
Supply Current vs Junction Temperature
Figure 20.
PWRGD On Resistance vs Junction Temperature
Figure 22.
BOOT-PH UVLO vs Junction Temperature
Figure 24.
SS/TR to V
SENSE
Offset vs V
SENSE
Figure 3.
Voltage Reference vs Junction Temperature
Figure 5.
Switching Frequency vs Junction Temperature
Figure 7.
Switching Frequency vs RT/CLK Resistance, Low-Frequency Range
Figure 9.
EA Transconductance vs Junction Temperature
Figure 11.
EN Pin Current vs Junction Temperature
Figure 13.
SS/TR Charge Current vs Junction Temperature
Figure 15.
Switching Frequency vs V
SENSE
Figure 17.
Shutdown Supply Current vs Input Voltage (V
IN
)
Figure 19.
V
IN
Supply Current vs Input Voltage
Figure 21.
PWRGD Threshold vs Junction Temperature
Figure 23.
Input Voltage (UVLO) vs Junction Temperature
Figure 25.
SS/TR to V
SENSE
Offset vs Temperature