SLUSF98 November 2024 TPSM84338
PRODUCTION DATA
- 1
- 1 Features
- 2 Applications
- 3 Description
- 4 Pin Configuration and Functions
- 5 Specifications
-
6 Detailed Description
- 6.1 Overview
- 6.2 Functional Block Diagram
- 6.3
Feature Description
- 6.3.1 Fixed Frequency Peak Current Mode
- 6.3.2 Mode Selection
- 6.3.3 Voltage Reference
- 6.3.4 Output Voltage Setting
- 6.3.5 Switching Frequency Selection, Synchronization
- 6.3.6 Phase Shift
- 6.3.7 Enable and Adjusting Undervoltage Lockout
- 6.3.8 External Soft Start and Prebiased Soft Start
- 6.3.9 Power Good
- 6.3.10 Minimum On Time, Minimum Off Time, and Frequency Foldback
- 6.3.11 Frequency Spread Spectrum
- 6.3.12 Overvoltage Protection
- 6.3.13 Overcurrent and Undervoltage Protection
- 6.3.14 Thermal Shutdown
- 6.4 Device Functional Modes
-
7 Application and Implementation
- 7.1
Typical Application
- 7.1.1 Design Requirements
- 7.1.2
Detailed Design Procedure
- 7.1.2.1 Custom Design With WEBENCH® Tools
- 7.1.2.2 Output Voltage Resistors Selection
- 7.1.2.3 Choosing Switching Frequency
- 7.1.2.4 Soft-Start Capacitor Selection
- 7.1.2.5 Output Capacitor Selection
- 7.1.2.6 Input Capacitor Selection
- 7.1.2.7 Feedforward Capacitor CFF Selection
- 7.1.2.8 Maximum Ambient Temperature
- 7.1.3 Application Curves
- 7.2 Best Design Practices
- 7.3 Power Supply Recommendations
- 7.4 Layout
- 7.1
Typical Application
- 8 Device and Documentation Support
- 9 Revision History
- 10Mechanical, Packaging, and Orderable Information
Package Options
Mechanical Data (Package|Pins)
- RCJ|9
Thermal pad, mechanical data (Package|Pins)
Orderable Information
5.6 Typical Characteristics
TJ = –40°C to 125°C, VIN = 12V, unless otherwise noted.
Figure 5-1 TPSM84338
Quiescent Current (PFM) vs Junction Temperature
Figure 5-3 Feedback
Voltage vs Junction Temperature
Figure 5-5 Disable Threshold vs Junction
Temperature
Figure 5-7 VIN UVLO Falling
Threshold vs Junction Temperature
Figure 5-9 TPSM84338
High-Side Current Limit vs Junction Temperature
Figure 5-11 OVP Threshold vs Junction
Temperature
Figure 5-13 Soft-Start Charge Current vs
Junction Temperature
Figure 5-15 TPSM84338 Load Regulation (PFM), VIN = 24V, VOUT = 12V, fSW = 2200kHz
Figure 5-2 TPSM84338
Shutdown Current vs Junction Temperature
Figure 5-4 Enable
Threshold vs Junction Temperature
Figure 5-6 VIN
UVLO Rising Threshold vs Junction Temperature
Figure 5-8 Switching
Frequency (RT Floating) vs Junction Temperature
Figure 5-10 TPSM84338
Low-Side Current Limit vs Junction Temperature
Figure 5-12 UVP Threshold vs Junction
Temperature
Figure 5-14 TPSM84338
Efficiency (PFM), VIN = 24V, VOUT = 12V, fSW = 2200kHz
Figure 5-16 TPSM84338 Load Regulation (FCCM),
VIN = 24V, VOUT = 12V, fSW = 2200kHz