Datasheet > ISL9441IRZ

ISL9441IRZ

更新时间： 2024-11-06 01:08:51

品牌	Logo	应用领域
英特矽尔 - INTERSIL		/
页数	文件大小	规格书
20页	985K
描述
Triple, 180Â° Out-of-Phase, Step-Down

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ISL9441IRZ 数据手册

ISL9440, ISL9440A, ISL9441

Data Sheet

December 5, 2007

FN6383.1

Triple, 180° Out-of-Phase, Step-Down

PWM and Single Linear Controller

Features

• Three Integrated Synchronous Buck PWM Controllers

- Internal Bootstrap Diodes

The ISL9440, ISL9440A and ISL9441 are quad-output

synchronous buck controllers that integrate 3 PWM

- Internal Compensation

controllers and 1 low drop-out linear regulator controller, which

are full featured and designed to provide multi-rail power for

use in products such as cable and satellite set-top boxes,

VoIP gateways, cable modems, and other home connectivity

products as well as a variety of industrial and general purpose

applications. Each output is adjustable down to 0.8V. The

PWMs are synchronized at 180° out of phase thus reducing

the RMS input current and ripple voltage.

- Internal Soft-Start

• Independent Control for Each Regulator and

Programmable Output Voltages; Independent

Enable/Shutdown

• Fixed Switching Frequency: 300kHz (ISL9440, ISL9441);

600kHz (ISL9440A)

• Adaptive Shoot Through Protection on all Synchronous

Buck Controllers

The ISL9440, ISL9440A and ISL9441 offer internal soft-start,

independent enable inputs for ease of supply rail

sequencing, and integrated UV/OV/OC/OT protections in a

space conscious 5mmx5mm QFN package. The ISL9440

and ISL9440A offer an early warning function to output a

logic signal to warn the system to back up data when input

voltage falls below a certain level.

• Independently Programmable Voltage Outputs

• Out-of-Phase Switching to Reduce Input Capacitance

(0°/180°/0°)

• No External Current Sense Resistor

- Uses Lower MOSFET’s r_DS(ON)

• Current Mode Controller with Voltage Feed Forward

The ISL9440, ISL9440A and ISL9441 utilize internal loop

compensation to keep minimum peripheral components for

compact design and a low total solution cost. These devices

are implemented with current mode control with feed forward

to cover various applications even with fixed internal

compensations.

• Complete Protection

- Overcurrent, Overvoltage, Undervoltage Lockout,

Over-Temperature

• Cycle by Cycle Current Limiting

• Wide Input Voltage Range

The table below shows the difference in terms of ISL9440,

ISL9440A and ISL9441 features.

- Input Rail Powers VIN Pin: 5.6V to 24V

- Input Rail Powers VCC_5V Pin (VIN tied to VCC_5V, for

5V input applications): 4.5V to 5.6V

PART

NUMBER

EARLY

WARNING

SWITCHING FREQUENCY

(kHz)

• Early Warning (ISL9440, ISL9440A) on Input Voltage

Failure

ISL9440

YES

300

600

300

ISL9440A

ISL9441

• Integrated Reset Function (ISL9440, ISL9440A)

• Pb-free (RoHS compliant)

Applications

• Satellite and Cable Set-Top Boxes

• Cable Modems

• VoX Gateway Devices

• NAS/SAN Devices

Related Literature

• Technical Brief TB389 “PCB Land Pattern Design and

Surface Mount Guidelines for QFN (MLFP) Packages”

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

1-888-INTERSIL or 1-888-468-3774 | Intersil (and design) is a registered trademark of Intersil Americas Inc.

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

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ISL9441IRZ 替代型号

型号	品牌	替代类型	描述	数据表
ISL9444IRZ	INTERSIL	功能相似	Triple, 180° Out-of-Phase, Synchronous Step-D

与ISL9441IRZ相关器件

型号	品牌	获取价格	描述	数据表
ISL9441IRZ-T	ROCHESTER	获取价格	SWITCHING CONTROLLER, 340 kHz SWITCHING FREQ-MAX, PQCC32, 5 X 5 MM, ROHS COMPLIANT, PLASTI
ISL9441IRZ-T	RENESAS	获取价格	SWITCHING CONTROLLER, 340kHz SWITCHING FREQ-MAX, PQCC32, 5 X 5 MM, ROHS COMPLIANT, PLASTIC
ISL9441IRZ-T13	RENESAS	获取价格	SWITCHING CONTROLLER
ISL9443	INTERSIL	获取价格	Triple, 180° Out-of-Phase, Synchronous Step-D
ISL9443IRZ	INTERSIL	获取价格	Triple, 180° Out-of-Phase, Synchronous Step-D
ISL9443IRZ	RENESAS	获取价格	SWITCHING CONTROLLER, 1380kHz SWITCHING FREQ-MAX, PQCC32, 5 X 5 MM, ROHS COMPLIANT, PLASTI
ISL9443IRZ-T	RENESAS	获取价格	SWITCHING CONTROLLER, 1380kHz SWITCHING FREQ-MAX, PQCC32, 5 X 5 MM, ROHS COMPLIANT, PLASTI
ISL9444	INTERSIL	获取价格	Triple, 180° Out-of-Phase, Synchronous Step-D
ISL9444	RENESAS	获取价格	Triple, 180Â° Out-of-Phase, Synchronous Step-
ISL9444_1107	INTERSIL	获取价格	Triple, 180° Out-of-Phase, Synchronous Step-D

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