ISL6421ERZ Intersil, ISL6421ERZ Datasheet

ISL6421ERZ

Manufacturer Part Number

ISL6421ERZ

Description

IC REG SGL LNB CONTROL 32-QFN

Manufacturer

Intersil

Datasheet

1.ISL6421ERZ.pdf (10 pages)

Specifications of ISL6421ERZ

Applications

Converter, Satellite Set-Top Box Designs

Voltage - Input

8 ~ 14 V

Number Of Outputs

Voltage - Output

13 ~ 18 V

Operating Temperature

-20°C ~ 85°C

Mounting Type

Surface Mount

Package / Case

32-VQFN Exposed Pad, 32-HVQFN, 32-SQFN, 32-DHVQFN

Lead Free Status / RoHS Status

Lead free / RoHS Compliant

Available stocks

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Part Number

Manufacturer

Quantity

Price

Company:

Bonase Electronics (HK) Co., Limited

Part Number:

ISL6421ERZ

Manufacturer:

Intersil

Quantity:

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Download datasheet (262Kb)

Single Output LNB Supply and Control

Voltage Regulator with I

Advanced Satellite Set-top Box Designs

The ISL6421 is a highly integrated solution for supplying

power and control signals from advanced satellite set-top

box (STB) modules to the low noise block (LNB). This device

is comprised of a current-mode boost PWM and a low-noise

linear regulator, along with the circuitry required for I

device interfacing and for providing DiSEqC

control signals to the LNB.

A regulated output voltage is available at the output terminal

(VOUT) to support the operation of the antenna port in

advanced satellite STB applications. The regulated output

may be set to either 13V or 18V by use of the voltage select

command (VSEL) through the I

compensate for the voltage drop in the coaxial cable, the

voltage may be increased by 1V with the line length

compensation (LLC) feature. An enable command sent on

the I

linear combination, disabling the output to conserve power.

A current-mode boost converter provides the linear regulator

with an input voltage that is set to the required output

voltage, plus 1.2V (typ.) to insure minimum power

dissipation. This maintains a constant voltage drop across

the linear pass element, while permitting an adequate

voltage range for tone injection.

The device is capable of providing 450mA (typ.).

Ordering Information

NOTE: Intersil Pb-free products employ special Pb-free material

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

plate termination finish, which is 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-020B.

ISL6421ER

ISL6421ER-T

ISL6421ERZ

(See Note)

ISL6421ERZ-T

(See Note)

PART NUMBER

C bus provides standby mode control for the PWM and

32 Ld 5x5 QFN Tape and Reel

(Pb-free)

TEMP. RANGE

-20 to 85

(

C bus. Additionally, to

32 Ld 5x5 QFN L32.5x5

32 Ld 5x5 QFN

(Pb-free)

C Interface for

Data Sheet

PACKAGE

standard

L32.5x5

DWG. #

PKG.

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

1-888-INTERSIL or 321-724-7143

Features

• Switch-Mode Power Converter for Lowest Dissipation

• External Pin to Select 13V/18V Options

• I

• Built-In Tone Oscillator Factory Trimmed to 22kHz

• Internal Over-Temperature Protection and Diagnostics

• Internal Overload and Overtemp Flags (Visible on I

• LNB Short-Circuit Protection and Diagnostics

• QFN Package

• Pb-free available

Applications

• LNB Power Supply and Control for Satellite Set-Top Box

References

• Tech Brief 389 (TB389) - “PCB Land Pattern Design and

- Boost PWM with >92% Efficiency

- Selectable 13V or 18V Outputs

- Digital Cable Length Compensation (1V)

- Registered Slave Address 0001 00XX

- Fully Functional 3.3V, 5V Operation up to 400kHz

- Facilitates DiSEqC (EUTELSAT) Encoding

- Compliant to JEDEC PUB95 MO-220 QFN - Quad Flat

- Near Chip-Scale Package Footprint

Surface Mount Guidelines for QFN Packages”; Available

on the Intersil website, www.intersil.com

C Compatible Interface for Remote Device Control

No Leads - Product Outline

July 2004

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

ISL6421

FN9130.1

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