ZHCS573I August 2010 – April 2018 LM25119
PRODUCTION DATA.
- 1 特性
- 2 應(yīng)用
- 3 說(shuō)明
- 4 修訂歷史記錄
- 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 High Voltage Start-Up Regulator
- 7.3.2 UVLO
- 7.3.3 Enable 2
- 7.3.4 Oscillator and Sync Capability
- 7.3.5 Error Amplifiers and PWM Comparators
- 7.3.6 Ramp Generator
- 7.3.7 Current Limit
- 7.3.8 Hiccup Mode Current Limiting
- 7.3.9 Soft Start
- 7.3.10 HO and LO Output Drivers
- 7.3.11 Maximum Duty Cycle
- 7.3.12 Thermal Protection
- 7.4 Device Functional Modes
-
8 Application and Implementation
- 8.1 Application Information
- 8.2
Typical Applications
- 8.2.1
Dual-output Design Example
- 8.2.1.1 Design Requirements
- 8.2.1.2
Detailed Design Procedure
- 8.2.1.2.1 Timing Resistor
- 8.2.1.2.2 Output Inductor
- 8.2.1.2.3 Current Sense Resistor
- 8.2.1.2.4 Ramp Resistor and Ramp Capacitor
- 8.2.1.2.5 Output Capacitors
- 8.2.1.2.6 Input Capacitors
- 8.2.1.2.7 VCC Capacitor
- 8.2.1.2.8 Bootstrap Capacitor
- 8.2.1.2.9 Soft Start Capacitor
- 8.2.1.2.10 Restart Capacitor
- 8.2.1.2.11 Output Voltage Divider
- 8.2.1.2.12 UVLO Divider
- 8.2.1.2.13 MOSFET Selection
- 8.2.1.2.14 MOSFET Snubber
- 8.2.1.2.15 Error Amplifier Compensation
- 8.2.1.3 Application Curves
- 8.2.2 Two-Phase Design Example
- 8.2.1
Dual-output Design Example
- 9 Power Supply Recommendations
- 10Layout
- 11器件和文檔支持
- 12機(jī)械、封裝和可訂購(gòu)信息
封裝選項(xiàng)
機(jī)械數(shù)據(jù) (封裝 | 引腳)
- RTV|32
散熱焊盤(pán)機(jī)械數(shù)據(jù) (封裝 | 引腳)
- RTV|32
訂購(gòu)信息
8.2.1.3 Application Curves
| VIN = 24 Vdc | IOUT rising from 2 A to 6 A |
| Top trace: VOUT = 3.3 V, 100 mV/div, AC-coupled | Bottom trace: IOUT, 2 A/div |
| Horizontal resolution: 0.5 ms/div |
Figure 22. Typical Efficiency vs Load Current