Enhanced Product (EP) Advanced Single Synchronous Buck Pulse-Width Modulation (PWM) Controller

The ISL6420BMAEP simplifies the implementation of a complete control and protection scheme for a highperformance DC/DC buck converter. It is designed to drive N-Channel MOSFETs in a synchronous rectified buck topology, the ISL6420BMAEP integrates control, output adjustment, monitoring and protection functions into a single package. Additionally, the IC features an external reference voltage tracking mode for externally referenced buck converter applications and DDR termination supplies, as well as a voltage margining mode for system testing in networking DC/DC converter applications.

Features

• Specifications per DSCC VID V62/07640

• Full Mil-Temp Electrical Performance from -55°C to +125°C

• Controlled Baseline with One Wafer Fabrication Site and One Assembly/Test Site

• Full Homogeneous Lot Processing in Wafer Fab

• No Combination of Wafer Fabrication Lots in Assembly

• Full Traceability Through Assembly and Test by Date/Trace Code Assignment

• Enhanced Process Change Notification

• Enhanced Obsolescence Management

• Eliminates Need for Up-Screening a COTS Component

• Operates from 4.5V thru 5.5V and 5.6V thru 28V Inputs

• Excellent Output Voltage Regulation

- 0.6V Internal Reference

- ±2.0 Reference Accuracy Over Line and Temperature

• Resistor-Selectable Switching Frequency

- 100kHz to 1.4MHz

• Voltage Margining and External Reference Tracking Modes

• Output Can Sink or Source Current

• Lossless, Programmable Overcurrent Protection

- Uses Upper MOSFET’s rDS(ON)

• Programmable Soft-Start

• Drives N-Channel MOSFETs

• Simple Single-Loop Control Design

- Voltage-Mode PWM Control

• Fast Transient Response

- High-Bandwidth Error Amplifier

- Full 0 to 100 Duty Cycle

• Extensive Circuit Protection Functions

- PGOOD, Overvoltage, Overcurrent, Shutdown

• Diode Emulation during Startup for Pre-Biased Load Applications

Applications

• Power Supplies for Microprocessors/ASICs

- DSP and Core Processors

- DDR SDRAM Bus Termination

• Distributed Power Systems

• Externally Referenced Buck Converters