ISL6540CRZ INTERSIL [Intersil Corporation], ISL6540CRZ Datasheet

ISL6540CRZ

Manufacturer Part Number

ISL6540CRZ

Description

Single-Phase Buck PWM Controller with Integrated High Speed MOSFET Driver and Pre-Biased Load Capability

Manufacturer

INTERSIL [Intersil Corporation]

Datasheet

1.ISL6540CRZ.pdf (20 pages)

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Single-Phase Buck PWM Controller with

Integrated High Speed MOSFET Driver

and Pre-Biased Load Capability

The ISL6540 is a single-phase voltage-mode PWM controller

with input voltage feedforward compensation to maintain a

constant loop gain for optimal transient response, especially for

applications with a wide input voltage range. Its integrated high

speed synchronous rectified MOSFET drivers and other

sophisticated features provide complete control and protection

for a DC/DC converter with minimum external components,

resulting in minimum cost and less engineering design efforts.

The output voltage of the converter can be precisely regulated

with an internal reference voltage of 0.591V, and has a system

tolerance of ±0.85% over commercial temperature and line load

variations. An external voltage can be used in place of the

internal reference for voltage tracking/DDR applications.

The ISL6540 has an internal linear regulator or external linear

regulator drive options for applications with only a single supply

rail. The internal oscillator is adjustable from 250kHz to 2MHz.

The integrated voltage margining, programmable pre-biased

soft-start, differential remote sensing amplifier, and

programmable input voltage POR features enhance the

ISL6540 value.

Pinout

REFOUT

VSEN+

VSEN-

REFIN

OFS+

OFS-

(28 LD 5x5 QFN)

TOP VIEW

ISL6540

SIDE PAD

BOTTOM

GND

Data Sheet

BOOT

UGATE

PHASE

PGND

LGATE

PVCC

LINDRV

1-888-INTERSIL or 1-888-468-3774

CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.

Features

• VIN and Power Rail Operation from +3.3V to +20V

• Fast Transient Response - 0 to 100% Duty Cycle

• 2.9V to 5.6V High Speed 2A/4A MOSFET Gate Drivers

• Internal Linear Regulator (LR) - 5.6V Bias from VIN

• External LR Drive for Optimal Thermal Performance

• Voltage Margining with Independently Adjustable Upper and

• Reference Voltage I/O for DDR/Tracking Applications

• Precise 0.591V Internal Reference with Buffered Output

• Source and Sink Overcurrent Protections

• Overvoltage and Undervoltage Protections

• Small Converter Size - QFN package

• Oscillator Programmable from 250kHz to 2MHz

• Differential Remote Voltage Sensing with Unity Gain

• Programmable Soft-start with Pre-Biased Load Capability

• Power Good Indication with Programmable Delay

• EN Input with Voltage Monitoring Capability

• Pb-Free Plus Anneal Available (RoHS Compliant)

Applications

• Power Supply for some Microprocessors and GPUs

• Wide and Narrow Input Voltage Range Buck Regulators

• Point of Load Applications

• Low-Voltage and High Current Distributed Power Supplies

Ordering Information

*Add “-T” suffix for tape and reel.

NOTE: Intersil Pb-free plus anneal products employ special Pb-free

material sets; molding compounds/die attach materials and 100% matte

tin plate termination finish, which are RoHS compliant and compatible

with both SnPb and Pb-free soldering operations. Intersil Pb-free

products are MSL classified at Pb-free peak reflow temperatures that

meet or exceed the Pb-free requirements of IPC/JEDEC J STD-020.

ISL6540CRZ

ISL6540CRZA ISL6540CRZ

ISL6540IRZ

ISL6540IRZA

- 15MHz Bandwidth Error Amplifier with 6V/

- Voltage-Mode PWM Leading and Trailing-edge

- Input Voltage Feedforward Compensation

- Tri-state for Power Stage Shutdown

Lower Settings for System Stress Testing & Over Clocking

- ±0.85%/±1.25% Over Commercial/Industrial Range

- Low- and High-Side MOSFET r

NUMBER*

(Note)

Modulation Control

PART

March 9, 2006

All other trademarks mentioned are the property of their respective owners.

Intersil (and design) is a registered trademark of Intersil Americas Inc.

ISL6540CRZ

ISL6540IRZ

MARKING

PART

RANGE (°C)

-40 to 85

0 to 70

TEMP.

DS(ON)

28 Ld QFN L28.5x5

PACKAGE

(Pb-Free)

ISL6540

Sensing

FN9214.0

s Slew Rate

DWG. #

PKG.

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