Datasheet > ISL6539IA

ISL6539IA

更新时间： 2024-11-27 22:13:47

品牌	Logo	应用领域
英特矽尔 - INTERSIL		开关光电二极管双倍数据速率控制器
页数	文件大小	规格书
20页	501K
描述
Wide Input Range Dual PWM Controller with DDR Option

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ISL6539IA 数据手册

ISL6539

Data Sheet

FN9144.4

June 6, 2005

Wide Input Range Dual PWM Controller

with DDR Option

Features

• Provides regulated output voltage in the range 0.9V-5.5V

The ISL6539 dual PWM controller delivers high efficiency and

tight regulation from two voltage regulating synchronous buck

DC/DC converters. It was designed especially for DDR DRAM,

SDRAM, graphic chipset applications, and system regulators in

high performance applications.

• Complete DDR memory power solution with VTT tracks

VDDQ/2 and VDDQ/2 buffered reference output

• Supports both DDR-I and DDR2 memory

• Lossless r

DS(ON)

current-sense sensing

Voltage-feed-forward ramp modulation, current mode

control, and internal feedback compensation provide fast

response to input voltage and output load transients. Input

current ripple is minimized by channel-to-channel PWM

phase shift of 0°, 90°, or 180° (determined by input voltage

and status of the DDR pin).

• Excellent dynamic response with voltage feed-forward and

current mode control accommodating wide range LC filter

selections

• Dual mode operation–operates directly from a 5.0-15V

input or 3.3V/5V system rail

• Undervoltage lock-out on VCC pin

The ISL6539 can control two independent output voltages

adjustable from 0.9V to 5.5V or, by activating the DDR pin,

transform into a complete DDR memory power supply

solution. In DDR mode, CH2 output voltage VTT tracks CH1

output voltage VDDQ. CH2 output can both source and sink

current, an essential power supply feature for DDR memory.

The reference voltage VREF required by DDR memory is

generated as well.

• Power-good, overcurrent, overvoltage, undervoltage

protection for both channels

• Synchronized 300kHz PWM operation in PWM mode

• Pb-Free Plus Anneal Available (RoHS Compliant)

Applications

•

Single and Dual Channel DDR Memory Power Systems

In dual power supply applications the ISL6539 monitors the

output voltage of both CH1 and CH2. An independent

PGOOD (power good) signal is asserted for each channel

after the soft-start sequence has completed, and the output

voltage is within PGOOD window. In DDR mode CH1

generates the only PGOOD signal.

•

Graphics cards - GPU and memory supplies

• Supplies for Servers, Motherboards, FPGAs

• ASIC power supplies

• Embedded processor and I/O supplies

• DSP supplies

Built-in overvoltage protection prevents the output from going

above 115% of the set point by holding the lower MOSFET on

and the upper MOSFET off. When the output voltage decays

below the overvoltage threshold, normal operation

automatically resumes. Once the soft-start sequence has

completed, undervoltage protection latches the offending

channel off if the output drops below 75% of its set point value

for the dual switcher. Adjustable overcurrent protection (OCP)

monitors the voltage drop across the r

MOSFET. If more precise current-sensing is required, an

external current sense resistor may be used.

of the lower

DS(ON)

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.

12 3 4 5 6 7...20

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ISL6539IA 替代型号

型号	品牌	替代类型	描述	数据表
ISL6539CA	INTERSIL	完全替代	Wide Input Range Dual PWM Controller with DDR Option
ISL6539CAZ-T	INTERSIL	完全替代	Wide Input Range Dual PWM Controller with DDR Option
ISL6539IAZ-T	INTERSIL	完全替代	Wide Input Range Dual PWM Controller with DDR Option

与ISL6539IA相关器件

型号	品牌	获取价格	描述	数据表
ISL6539IA-T	INTERSIL	获取价格	Wide Input Range Dual PWM Controller with DDR Option
ISL6539IAZ	INTERSIL	获取价格	Wide Input Range Dual PWM Controller with DDR Option
ISL6539IAZ-T	INTERSIL	获取价格	Wide Input Range Dual PWM Controller with DDR Option
ISL6540	INTERSIL	获取价格	Single-Phase Buck PWM Controller with Integrated High Speed MOSFET Driver and Pre-Biased L
ISL6540_06	INTERSIL	获取价格	Single-Phase Buck PWM Controller with Integrated High Speed MOSFET Driver and Pre-Biased L
ISL6540A	INTERSIL	获取价格	Single-Phase Buck PWM Controller with Integrated High Speed MOSFET Driver and Pre-Biased L
ISL6540ACRZ	INTERSIL	获取价格	Single-Phase Buck PWM Controller with Integrated High Speed MOSFET Driver and Pre-Biased L
ISL6540ACRZA	INTERSIL	获取价格	Single-Phase Buck PWM Controller with Integrated High Speed MOSFET Driver and Pre-Biased L
ISL6540ACRZA	RENESAS	获取价格	4A SWITCHING CONTROLLER, 2000kHz SWITCHING FREQ-MAX, PQCC28, 5 X 5 MM, ROHS COMPLIANT, PLA
ISL6540ACRZA-T	RENESAS	获取价格	4A SWITCHING CONTROLLER, 2000kHz SWITCHING FREQ-MAX, PQCC28, 5 X 5 MM, ROHS COMPLIANT, PLA

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