ZHCSLU2C December 2021 – August 2024 LM63440-Q1 , LM63460-Q1
PRODUCTION DATA
- 1
- 1 特性
- 2 應用
- 3 說明
- 4 Device Comparison Table
- 5 Pin Configuration and Functions
- 6 Specifications
-
7 Detailed Description
- 7.1 Overview
- 7.2 Functional Block Diagram
- 7.3
Feature Description
- 7.3.1 Input Voltage Range (VIN1, VIN2)
- 7.3.2 Output Voltage Setpoint (FB)
- 7.3.3 Precision Enable and Input Voltage UVLO (EN/SYNC)
- 7.3.4 Frequency Synchronization (EN/SYNC)
- 7.3.5 Clock Locking
- 7.3.6 Adjustable Switching Frequency (RT)
- 7.3.7 Power-Good Monitor (PGOOD)
- 7.3.8 Bias Supply Regulator (VCC, BIAS)
- 7.3.9 Bootstrap Voltage and UVLO (CBOOT)
- 7.3.10 Spread Spectrum
- 7.3.11 Soft Start and Recovery From Dropout
- 7.3.12 Overcurrent and Short-Circuit Protection
- 7.3.13 Thermal Shutdown
- 7.3.14 Input Supply Current
- 7.4 Device Functional Modes
-
8 Application and Implementation
- 8.1 Application Information
- 8.2
Typical Applications
- 8.2.1 Design 1 – Automotive Synchronous 6A Buck Regulator at 2.1MHz
- 8.2.2
Design 2 – Automotive Synchronous 4A Buck Regulator at 2.1MHz
- 8.2.2.1 Design Requirements
- 8.2.2.2
Detailed Design Procedure
- 8.2.2.2.1 Custom Design With WEBENCH? Tools
- 8.2.2.2.2 Setting the Output Voltage
- 8.2.2.2.3 Choosing the Switching Frequency
- 8.2.2.2.4 Inductor Selection
- 8.2.2.2.5 Output Capacitor Selection
- 8.2.2.2.6 Input Capacitor Selection
- 8.2.2.2.7 Bootstrap Capacitor
- 8.2.2.2.8 VCC Capacitor
- 8.2.2.2.9 BIAS Power Connection
- 8.2.2.2.10 Feedforward Network
- 8.2.2.2.11 Input Voltage UVLO
- 8.2.2.3 Application Curves
- 8.2.3 Design 3 – Automotive Synchronous 6A Buck Regulator at 400kHz
- 8.3 Power Supply Recommendations
- 8.4 Layout
- 9 Device and Documentation Support
- 10Revision History
- 11Mechanical, Packaging, and Orderable Information
8.2.2.3 Application Curves
Unless otherwise indicated, VIN = 13.5V, VOUT = 5V, IOUT = 6A, fSW = 2.1MHz, AUTO mode, and TA = 25°C. Figure 8-1 shows the circuit schematic with relevant BOM components specified in Table 8-10.
Figure 8-3 LM634x0-Q1 Efficiency
Figure 8-5 LM634x0-Q1 Start-Up,6A Resistive Load
Figure 8-7 LM634x0-Q1 Load Transient,IOUT = 3A to 6A
Figure 8-9 LM634x0-Q1 Short-Circuit Hiccup
Figure 8-11 LM634x0-Q1 Line
Transient and Recovery from Dropout
Figure 8-15 CISPR
25 Class 5 Conducted EMI,150kHz to 30MHz
Figure 8-17 CISPR
25 Class 5 Radiated EMI,Bicon Antenna, Horizontal Polarization,
30MHz to 200MHz
Figure 8-19 CISPR
25 Class 5 Radiated EMI,Log Antenna, Horizontal Polarization,
200MHz to 1GHz
Figure 8-4 LM634x0-Q1 Load and Line Regulation
Figure 8-6 LM634x0-Q1 Enable On and Off,6A Resistive Load
Figure 8-8 LM634x0-Q1 Load Transient,IOUT = 0A to 6A
Figure 8-10 LM634x0-Q1 Short-Circuit Recovery to No
Load
Figure 8-12 LM634x0-Q1 Frequency Foldback in Dropout,
VIN = 3V
Figure 8-16 CISPR
25 Class 5 Conducted EMI,30MHz to 108MHz
Figure 8-18 CISPR
25 Class 5 Radiated EMI,Bicon Antenna, Vertical Polarization,
30MHz to 200MHz
Figure 8-20 CISPR
25 Class 5 Radiated EMI,Log Antenna, Vertical Polarization,
200MHz to 1GHz