ISL6441

The ISL6441 is a high-performance, triple-output controller optimized for converting wall adapter, battery or network intermediate bus DC input supplies into the system supply voltages required for a wide variety of applications. Each output is adjustable down to 0.8V. The two PWMs are synchronized 180° out-of-phase reducing the RMS input current and ripple voltage.

The ISL6441 incorporates several protection features. An adjustable overcurrent protection circuit monitors the output current by sensing the voltage drop across the lower MOSFET. Hiccup mode overcurrent operation protects the DC/DC components from damage during output overload/short circuit conditions. Each PWM has an independent logic-level shutdown input (SD1 and SD2).

A single PGOOD signal is issued when soft-start is complete on both PWM controllers and their outputs are within 10% of the set point and the linear regulator output is greater than 75% of its setpoint. Thermal shutdown circuitry turns off the device if the junction temperature exceeds +150°C..

Applications

• Power Supplies with Multiple Outputs
• xDSL Modems/Routers
• DSP, ASIC, and FPGA Power Supplies
• Set-Top Boxes
• Dual Output Supplies for DSP, Memory, Logic, μP Core and I/O
• Telecom Systems

ISL6441 特点

• Wide Input Supply Voltage Range
  • 5.6V to 24V
  • 4.5V to 5.6V
• Three Independently Programmable Output Voltages
• Switching Frequency 1.4MHz
• Out-of-Phase PWM Controller Operation
  • Reduces Required Input Capacitance and Power Supply Induced Loads
• No External Current Sense Resistor
  • Uses Lower MOSFET's rDS(ON)
• Bi-directional Frequency Synchronization for Synchronizing Multiple ISL6441s
• Programmable Soft-Start
• Extensive Circuit Protection Functions
  • PGOOD
  • UVLO
  • Overcurrent
  • Over-temperature
  • Independent Shutdown for Both PWMs
• Excellent Dynamic Response
  • Voltage Feed-Forward with Current Mode Control
• QFN Package:
  • QFN - Compliant to JEDEC PUB95 MO-220 QFN - Quad Flat No Leads - Package Outline
  • Near Chip-Scale Package footprint, which improves PCB efficiency and has a thinner profile
• Pb-Free (RoHS Compliant)

ISL6441 芯片订购指南

芯片型号	产品状态	温度范围	封装尺寸图
ISL6441IRZ	量产	工业级	28 Ld QFN
ISL6441IRZ-T	量产	工业级	28 Ld QFN T+R
ISL6441IRZ-TK	量产	工业级	28 Ld QFN T+R
ISL6441EVAL1	Coming Soon		评估板
ISL6441IR	停产	工业级	28 Ld QFN
ISL6441IR-T	停产	工业级	28 Ld QFN T+R
ISL6441IR-TK	停产	工业级	28 Ld QFN T+R

ISL6441 应用技术支持与电子电路设计开发资源下载

1. ISL6441 数据资料 datatSheet 下载.PDF
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