The JTMA1280AMP also incorporates a high-speed differential

1.产品概述 2.产品特点 3.应用范围 4.技术规格书下载（产品PDF文档）
5.产品封装图 6.电路原理图 7.功能概述 8.相关产品

一,产品概述(General Description)

The JTMA1280AMP is a simple, cost-effective and high-speed linear regulator designed
to generate termination voltage in double data rate (DDR) memory system to comply with the
JEDEC SSTL_2 and SSTL_18 or other specific interfaces such as HSTL,SCSI-2 and SCSI-3 etc.
devices requirements. The regulator is cJTMAable of actively sinking or sourcing up to 2A while
regulating an output voltage to within 40mV.The output termination voltage cab be tightly regulated
to track 1/2VDDQ by two external voltage divider resistors or the desired output voltage can be
pro-grammed by externally forcing the REFEN pin voltage.
The JTMA1280AMP also incorporates a high-speed differential amplifier to provide ultra-fast
response in line/load transient. Other features include extremely low initial offset voltage, excellent
load regulation, current limiting in bi-directions and on-chip thermal shut-down protection.Built-in
softstart function avoids a misoperation by inrush current.
The JTMA1280AMP are available in the ESOP-8 (Exposed Pad) surface mount packages.
二.产品特点(Features)

Ideal for DDR-I, DDR-II and DDR-III VTT JTMAplications
Sink and Source up to 2Amp
Integrated Power MOSFETs
Generates Termination Voltage for SSTL_2, SSTL_18,
HSTL, SCSI-2 and SCSI-3 Interfaces.
High Accuracy Output Voltage at Full-Load
Output Adjustment by Two External Resistors
Built-in Soft-start Function
Shutdown for Suspend to RAM (STR) Functionality
with High-Impedance Output
Current Limiting Protection
On-Chip Thermal Protection
Available in ESOP-8 (Exposed Pad) Packages
VIN and VCNTL Under Voltage Protection
RoHS Compliant and Halogen Free
三,应用范围 (Applications)

Desktop PCs, Notebooks, and Workstations
GrJTMAhics Card Memory Termination
Set Top Boxes, Digital TVs, Printers
Embedded Systems
Active Termination Buses
DDR-I, DDR-II and DDR-III Memory Systems
四.技术规格书下载（产品PDF）

JTMA1280AMP

五,产品封装图 (Package)

六.电路原理图

七,功能概述

Input Voltage (VIN) ------------------------------------------ 6V
CNTL Pin Voltage (VCNTL) -------------------------------- 6V
Power Dissipation (PD) ------------------------------------ Internally Limited
Storage Temperature Range (TST) --------------------- -65 to +150°C

Lead Temperature (Soldering, 10sec.) ---------------260°C
Thermal Resistance from Junction to Case (R thjc)28°C/W
八,相关芯片选择指南

Power IC-DDR & Reset
Part Number	Package	Vin(typ)	Vin (max)	Max. Current (A)	Current Limit (A)	Quiescent Current Typ. (uA)
JTMA1210MP	ESOP-8	1.1/1.4/2.5	6	2.5	3	0.05
JTMA1270AMP	ESOP-8	1.5/1.8/2.5	6	2.5	3.2	0.05
JTMA1280AMP	ESOP-8	1.5/1.8/2.5	6	2	2.2	0.05
JTMA6800Y	SOT-26	1.65~5.5
JTMA6800GN15B	DFN-1.5X2-6L	1.65~5.5
JTMA3146O	TSSOP-28
JTMA3048O	TSSOP-16
JTMA3048M	SOP-16

(责任编辑：oumao18)