ISL6521 PWM Buck DC/DC and Triple Linear Power Controller Print Friendly

ISL6521

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PWM Buck DC/DC and Triple Linear Power Controller

Ordering Information

Available in RoHS/Pb-Free

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Part No.

Design-In
Status

Temp.

Package

MSL

Price
US $

ISL6521CB

Active

Comm

16 Ld SOIC

2.97

ISL6521CB-T

Active

Comm

16 Ld SOIC T+R

2.97

ISL6521CBZ

Active

Comm

16 Ld SOIC

2.97

ISL6521CBZ-T

Active

Comm

16 Ld SOIC T+R

2.97

ISL6521CBZA

Active

Comm

16 Ld SOIC

2.97

ISL6521CBZA-T

Active

Comm

16 Ld SOIC T+R

2.97

ISL6521EVAL1Z

Active

Eval Board

N/A

ISL6521IBZ

Active

Ind

16 Ld SOIC

2.97

ISL6521IBZ-T

Active

Ind

16 Ld SOIC T+R

2.97

ISL6521EVAL1

InActive

Eval Board

N/A

The price listed is the manufacturer's suggested retail price for quantities of 1K units. However, prices in today's market are fluid and may change without notice.

MSL = Moisture Sensitivity Level - per IPC/JEDEC J-STD-020

SMD = Standard Microcircuit Drawing

Description

The ISL6521 provides the power control and protection for four output voltages in low-voltage, high-performance applications. The IC integrates a voltage-mode PWM controller and three linear controllers, as well as monitoring and protection functions into a 16-lead SOIC package. The PWM controller is intended to regulate the low voltage supply that requires the greatest amount of current (usually the core voltage for the FPGA, ASIC, or processor) with a synchronous rectified buck converter. The linears are intended to regulate other system voltages, such as I/O (input/output) and memory circuits. Both the switching regulator and linear voltage reference provide ±2% of static regulation over line, load, and temperature ranges. All outputs are user-adjustable by means of an external resistor divider. All linear controllers can supply up to 120mA with no external pass devices. Employing bipolar NPNs for the pass transistors, the linear regulators can achieve output currents of 3A or higher with proper device selection.

The ISL6521 monitors all the output voltages. The PWM controller’s adjustable overcurrent function monitors the output current by using the voltage drop across the upper MOSFET’s r_DS(ON). The linear regulator outputs are monitored via the FB pins for undervoltage events.

Key Features

Provides 4 Regulated Voltages-Switching Regulator 20A Capable-Three Linear Regulators - Capable of 120mA - Capable of up to 3A with an External Transistor
Externally Resistor-Adjustable Outputs
Simple Single-Loop Control Design-Voltage-Mode PWM Control
Fast PWM Converter Transient Response-High-Bandwidth Error Amplifier-Full 0% to 100% Duty Ratio
Excellent Output Voltage Regulation-All Outputs: ±2% Over Temperature
Overcurrent Fault Monitors-Switching Regulator Does Not Require Extra Current Sensing Element, Uses MOSFET’s r_DS(ON)
Small Converter Size-300kHz Constant Frequency Operation-Small External Component Count
Commercial and Industrial Temperature Range Support
Pb-free Available (RoHS Compliant)

Related Documentation

Datasheet(s):
PWM Buck DC-DC and Triple Linear Power Controller

Evaluation Board(s):
Power Management Controller For Mixed-Voltage FPGA Based Systems

Technical Homepage:
Broadband

i-Sim:
Getting Started with iSim and iSim:PE ISL6521 iSim

Parametric Data


V_IN (min) (V)		5

V_IN (max) (V)		5

V_OUT1 (min) (V)		.8

V_OUT1 (max) (V)		4.5

V_OUT2 (V)		Adj.

V_OUT3 (V)		Adj.

V_OUT4 (V)		Adj.

I_OUT1 (A)		20

Application Block Diagrams

Applications

FPGA and PowerPC™-based boards
General purpose, low voltage power supplies

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Parametric Table

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