ISL6420AIAZ-TK Intersil, ISL6420AIAZ-TK Datasheet

ISL6420AIAZ-TK

Manufacturer Part Number

ISL6420AIAZ-TK

Description

IC CTRLR PWM SYNC BUCK 20-QSOP

Manufacturer

Intersil

Datasheets

1.ISL6420AIAZ-TK.pdf (20 pages)

2.ISL6420AIAZ-TK.pdf (21 pages)

Specifications of ISL6420AIAZ-TK

Pwm Type

Voltage Mode

Number Of Outputs

Frequency - Max

1.4MHz

Duty Cycle

100%

Voltage - Supply

4.5 V ~ 28 V

Buck

Yes

Boost

Flyback

Inverting

Doubler

Divider

Cuk

Isolated

Operating Temperature

-40°C ~ 85°C

Package / Case

20-QSOP

Frequency-max

1.4MHz

Lead Free Status / RoHS Status

Lead free / RoHS Compliant

Other names

ISL6420AIAZ-TKTR

Available stocks

Company

Part Number

Manufacturer

Quantity

Price

Company:

Bonase Electronics (HK) Co., Limited

Part Number:

ISL6420AIAZ-TK

Manufacturer:

Intersil

Quantity:

2 400

Current page: 1 of 21
Download datasheet (606Kb)

Advanced Single Synchronous Buck Pulse-Width

Modulation (PWM) Controller

ISL6420A

The ISL6420A simplifies the implementation of a

complete control and protection scheme for a

high-performance DC/DC buck converter. It is designed

to drive N-Channel MOSFETs in a synchronous rectified

buck topology. The ISL6420A 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.

The ISL6420A provides simple, single feedback loop,

voltage mode control with fast transient response. The

output voltage of the converter can be precisely

regulated to as low as 0.6V.

The operating frequency is fully adjustable from

100kHz to 1.4MHz. High frequency operation offers

cost and space savings.

The error amplifier features a 15MHz gain-bandwidth

product and 6V/µs slew rate that enables high

converter bandwidth for fast transient response. The

PWM duty cycle ranges from 0% to 100% in transient

conditions. Selecting the capacitor value from the

ENSS pin to ground sets a fully adjustable PWM

soft-start. Pulling the ENSS pin LOW disables the

controller.

The ISL6420A monitors the output voltage and

generates a PGOOD (power good) signal when

soft-start sequence is complete and the output is

within regulation. A built-in overvoltage protection

circuit prevents the output voltage from going above

typically 115% of the set point. Protection from

overcurrent conditions is provided by monitoring the

operation appropriately. This approach simplifies the

implementation and improves efficiency by eliminating

the need for a current sensing resistor.

December 4, 2009

FN9169.4

DS(ON)

of the upper MOSFET to inhibit the PWM

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

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

Features

• Operates From:

• 0.6V Internal Reference Voltage

• Resistor-Selectable Switching Frequency

• Voltage Margining and External Reference Tracking

• Output can Sink or Source Current

• Lossless, Programmable Overcurrent Protection

• Programmable Soft-Start

• Drives N-Channel MOSFETs

• Simple Single-Loop Control Design

• Fast Transient Response

• Extensive Circuit Protection Functions

• Diode Emulation during Startup for Pre-Biased

• Offered in 20 Ld QFN and QSOP Packages

• QFN (4x4) Package

• Pb-Free (RoHS Compliant)

Applications

• Power Supplies for Microprocessors/ASICs

• Ethernet Routers and Switchers

• High-Power DC/DC Regulators

• Distributed DC/DC Power Architecture

• Personal Computer Peripherals

• Externally Referenced Buck Converters

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

- 4.5V to 5.5V Input

- 5.5V to 28V Input

- ±1.0% Reference Accuracy

- 100kHz to 1.4MHz

Modes

- Uses Upper MOSFET’s r

- Voltage-Mode PWM Control

- High-Bandwidth Error Amplifier

- Full 0% to 100% Duty Cycle

- PGOOD, Overvoltage, Overcurrent, Shutdown

Load Applications

- QFN compliant to JEDEC PUB95 MO-220

- QFN Near Chip Scale Package Footprint;

- Embedded Controllers

- DSP and Core Processors

- DDR SDRAM Bus Termination

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

QFN -Quad Flat No Leads - Product Outline

Improves PCB Efficiency, Thinner in Profile

DS(ON)

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