ZHCSMC1B october 2020 – august 2023 LM5157-Q1 , LM51571-Q1
PRODUCTION DATA
- 1
- 1 特性
- 2 應用
- 3 說明
- 4 Revision History
- 5 說明（續）
- 6 Device Comparison Table
- 7 Pin Configuration and Functions
- 8 Specifications
-
9 Detailed Description
- 9.1 Overview
- 9.2 Functional Block Diagram
- 9.3
Feature Description
- 9.3.1 Line Undervoltage Lockout (UVLO/SYNC/EN Pin)
- 9.3.2 High Voltage VCC Regulator (BIAS, VCC Pin)
- 9.3.3 Soft Start (SS Pin)
- 9.3.4 Switching Frequency (RT Pin)
- 9.3.5 Dual Random Spread Spectrum – DRSS (MODE Pin)
- 9.3.6 Clock Synchronization (UVLO/SYNC/EN Pin)
- 9.3.7 Current Sense and Slope Compensation
- 9.3.8 Current Limit and Minimum On Time
- 9.3.9 Feedback and Error Amplifier (FB, COMP Pin)
- 9.3.10 Power-Good Indicator (PGOOD Pin)
- 9.3.11 Hiccup Mode Overload Protection (MODE Pin)
- 9.3.12 Maximum Duty Cycle Limit and Minimum Input Supply Voltage
- 9.3.13 Internal MOSFET (SW Pin)
- 9.3.14 Overvoltage Protection (OVP)
- 9.3.15 Thermal Shutdown (TSD)
- 9.4 Device Functional Modes
- 10Application and Implementation
- 11Power Supply Recommendations
- 12Layout
- 13Device and Documentation Support
- 14Mechanical, Packaging, and Orderable Information
8.6 Typical Characteristics
Figure 8-1 BIAS
Shutdown Current vs VBIAS
Figure 8-3 BIAS
Operating Current vs Temperature
Figure 8-5 VVCC vs
IVCC
Figure 8-7 EN
Threshold vs Temperature
Figure 8-9 FB
Reference vs Temperature
Figure 8-11 Frequency vs Temperature
Figure 8-13 Peak
Current Limit vs Duty Cycle
Figure 8-15 Minimum On Time vs Frequency
Figure 8-2 BIAS
Shutdown Current vs Temperature
Figure 8-4 VVCC vs VBIAS
Figure 8-6 ISS vs Temperature
Figure 8-8 UVLO
Threshold vs Temperature
Figure 8-10 Frequency vs RT Resistance
Figure 8-12 Current Limit Threshold vs Temperature
Figure 8-14 Internal MOSFET Drain Source On-state Resistance vs Temperature
Figure 8-16 Maximum Duty Cycle Limit vs Frequency