CXEP3476 CXEP3477 CXEP3478 CXEP3478B线性调节器高速运算放大器对负载瞬变有很好的响应提供1.5A的连续电流3A瞬态峰值低输出偏移精确的VTT和VREF电压

CXEP3476 CXEP3477 CXEP3478 CXEP3478B是一种线性调节器，设计用于满足DDR-SDRAM端接的JEDEC SSTL-2和SSTL-3（系列存根端接逻辑）规范。它包含一个高速运算放大器，对负载瞬变有很好的响应。根据DDR-SDRAM终端的要求，该装置可在应用中提供1.5A的连续电流和高达3A的瞬态峰值。CXEP3476 CXEP3477 CXEP3478 CXEP3478B具有独立的VSENSE引脚，可提供优越的负载调节。CXEP3476 CXEP3477 CXEP3478 CXEP3478B提供VREF输出，作为芯片组和dimm应用的参考。CXEP3476 CXEP3477 CXEP3478 CXEP3478B无需外部电阻即可轻松提供精确的VTT和VREF电压，从而减少PCB面积。静态电流在2.5V时低至280μA，满足低功耗应用。
工作电源电压：1.6V至5.5V
·低供电电流：280μA@2.5V
“低输出偏移
·源和汇电流
·外部组件数量少
无需感应器
无需外部电阻器
热关机保护

目录

1.产品概述       2.产品特点     

3.应用范围       4.技术规格书下载（PDF文档）

5.产品封装       6.电路原理图  

7.相关产品

   产品概述 返回TOP

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The CXEP3476 CXEP3477 CXEP3478 CXEP3478B is a linear regulator designed to meet the JEDEC SSTL-2 and SSTL-3 (Series Stub Termination Logic) specifications for termination of DDR-SDRAM. It contains a high-speed operational amplifier that provides excellent response to the load transients. This device can deliver 1.5A continuous current and transient peaks up to 3A in the application as required for DDR-SDRAM termination. With an independent VSENSE pin, the CXEP3476 CXEP3477 CXEP3478 CXEP3478B can provide superior load regulation. The CXEP3476 CXEP3477 CXEP3478 CXEP3478B provides a VREF output as the reference for the applications of the chipset and DIMMs.
The CXEP3476 CXEP3477 CXEP3478 CXEP3478Bcan easily provide the accurate VTT and VREF voltages without external resistors that PCB areas can be reduced. The quiescent current is as low as 280μA @ 2.5V. So the power consumption can meet the low power consumption applications.

   产品特点 返回TOP

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„ Operation Supply Voltage: 1.6V to 5.5V 

„ Low Supply Current: 280μA @ 2.5V 

„ Low Output Offset 

„ Source and Sink Current 

„ Low External Component Count 

„ No Inductor Required 

„ No external Resistors Required 

„ Thermal Shutdown Protection 

„ SOP-8 with Power-Pad package

   应用范围 返回TOP

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„ DDR-SDRAM Termination Voltage 

„ DDR-I / DDR-II Termination Voltage 

„ SSTL-2 

„ SSTL-3

   技术规格书（产品PDF) 返回TOP 

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产品封装图 返回TOP

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电路原理图 返回TOP

 

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DDR Terminator
Part   NO.	VDDQ (V)min	VDDQ (V)max	VCNTL (V)	Isource (A)	Isink (A)	IVREF (mA)	Isupply (μA)	Note	Package
CXEP3473	1.2	3.6	3.3~5.5	3	3	10	750	DDR3/3L,LPDDR2/3	TDFN2X2-10
CXEP3474	1.2	3.6	3~5.5	1.8	1.8	--	700	DDR1/2/3/3L	SOP8(FD)/MSOP-8(FD)
CXEP3475	1.2	3.6	3.3~5.5	3	3	--	750	DDR1/2/3/3L	SOP8(FD)
CXEP3475B	1.2	3.6	3~5.5	2	2	--	1300	DDR1/2/3	SOT23-5/SOP8/ MSOP8(FD)
CXEP3476/7	1.6	5.5	1.6~5.5	1.5	1.5	0.03	280	DDR1/2	SOP8(FD)
CXEP3478/B	1.2	3.6	3~5.5	4~3	4~3	10	800	DDR1/2/3/3L	MSOP10(FD)/MSOP8(FD)
CXEP3479	1.2	3.6	3~5.5	4~3	4~3	10	900	DDR1/2/3/3L	MSOP8/SOP8(FD)
CXEP3480	1.2	3.6	3~5.5	4	4	10	900	DDR1/2/3	SOP8(FD)