LM5642 / LM5642X高电压,双通道同步降压转换器与振荡器同步 LM5642/LM5642X High Voltage, Dual Synchronous Buck Converter with Oscillator Synchronization
DESCRIPON
The LM5642 series consists of two current mode synchronous buck regulator controllers operating 180° out of phase with each other at a normal switching frequency of 200kHz for the LM5642 and at
375kHz for the LM5642X.
FEATURES
• Two Synchronous Buck Regulators
• 180° Out of Phase Operation
• 200 kHz Fixed Nominal Frequency: LM5642
• 375 kHz Fixed Nominal Frequency: LM5642X
• Synchronizable Switching Frequency from 150 kHz to 250 kHz for the LM5642 and 200 kHz to
500 kHz for the LM5642X
• 4.5V to 36V Input Range
• 50 µA Shutdown Current
• Adjustable Output from 1.3V to 90% of Vin
• 0.04% Typical Line and Load Regulation Accuracy
• Current Mode Control with or without a Sense Resistor
• Independent Enable/Soft-start Pins Allow Simple Sequential Startup Configuration.
• Adjustable Cycle-by-cycle Current Limit
• Input Under-voltage Lockout
• Output Over-voltage Latch Protection
• Output Under-voltage Protection with Delay
• Thermal Shutdown
• Self Discharge of Output Capacitors when the Regulator is OFF
• TSSOP and HTSSOP Exposed PAD Packages
输出接口数 2
输出电压 1.3V ~ 32.4V
输出电流 20 A
通道数 2
耗散功率 1100 mW
静态电流 1.10 mA
调节输出数 2
开关频率 375 kHz
拓扑结构 Buck
占空比 98.9 %
输入电压Max 36 V
输入电压Min 4.5 V
最大占空比 0.989
工作温度Max 125 ℃
工作温度Min -40 ℃
耗散功率Max 1100 mW
电源电压 4.5V ~ 36V
输入电压 4.5V ~ 36V
安装方式 Surface Mount
引脚数 28
封装 TSSOP-28
封装 TSSOP-28
工作温度 -40℃ ~ 125℃ TJ
产品生命周期 Active
包装方式 Tape & Reel TR
RoHS标准 RoHS Compliant
含铅标准 Lead Free
型号/品牌 | 代替类型 | 替代型号对比 |
---|---|---|
LM5642XMTX/NOPB TI 德州仪器 | 当前型号 | 当前型号 |
LM5642XMT/NOPB 德州仪器 | 完全替代 | LM5642XMTX/NOPB和LM5642XMT/NOPB的区别 |
LM5642XMTX 德州仪器 | 完全替代 | LM5642XMTX/NOPB和LM5642XMTX的区别 |
LM5642XMT 德州仪器 | 类似代替 | LM5642XMTX/NOPB和LM5642XMT的区别 |