ISL6525数据手册集成电路（IC）的PMIC-稳压器-DCDC开关式控制器规格书PDF

描述 Description

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The ISL6525 provides complete control and protection for a DC-DC converter optimized for high-performance microprocessor applications. It is designed to drive two N Channel MOSFETs in a synchronous-rectified buck topology. The ISL6525 integrates all of the control, output adjustment, monitoring and protection functions into a single package. A programmable delay time for the PGOOD signal makes it especially suitable for the VTT regulation in VRM8. 5 applications. The output voltage of the converter can be precisely regulated to as low as 1. 20V, with a maximum tolerance of ±1% over temperature and line voltage variations. The ISL6525 provides simple, single feedback loop, voltage-mode control with fast transient response. It includes a 200kHz free-running triangle-wave oscillator that is adjustable from below 50kHz to over 1MHz. The error amplifier features a 15MHz gain-bandwidth product and 6V/µs slew rate which enables high converter bandwidth for fast transient performance. The resulting PWM duty ratio ranges from 0% to 100%. The ISL6525 protects against over-current conditions by inhibiting PWM operation. The ISL6525 monitors the current by using the rDS(ON) of the upper MOSFET which eliminates the need for a current sensing resistor.

特性 Features

• Drives Two N-Channel MOSFETs
• Operates From +5V or +12V Input
• Simple Single-Loop Control Design
• Voltage-Mode PWM Control
• Fast Transient Response
• High-Bandwidth Error Amplifier
• Full 0% to 100% Duty Ratio
• Excellent Output Voltage Regulation
• 1.20V Internal Reference
• ±1% Over Line Voltage and Temperature
• Programmable delay for PGOOD signal
• Over-Current Fault Monitor
• Does Not Require Extra Current Sensing Element
• Uses MOSFETs rDS(ON)
• Small Converter Size
• Constant Frequency Operation
• 200kHz Free-Running Oscillator Programmable from 50kHz to Over 1MHz
• 14 Pin, SOIC Package
• Pb-Free Available (RoHS Compliant)

应用 Application

• Power Supply for Various Microprocessors
• VTT Regulation for VRM85
• High-Power 5V to 3xV DC-DC Regulators
• Low-Voltage Distributed Power Supplies