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LTC3876EUHF#TRPBF PDF预览

LTC3876EUHF#TRPBF

更新时间: 2024-02-25 09:48:00
品牌 Logo 应用领域
凌特 - Linear 双倍数据速率开关
页数 文件大小 规格书
48页 616K
描述
LTC3876 - Dual DC/DC Controller for DDR Power with Differential VDDQ Sensing and ±50mA VTT Reference; Package: QFN; Pins: 38; Temperature Range: -40°C to 85°C

LTC3876EUHF#TRPBF 技术参数

是否无铅: 含铅是否Rohs认证: 符合
生命周期:Active包装说明:HVQCCN,
针数:38Reach Compliance Code:compliant
风险等级:5.63其他特性:OPERATES IN ADJUSTABLE MODE FROM 1 TO 2.5V
模拟集成电路 - 其他类型:DUAL SWITCHING CONTROLLER控制模式:CURRENT-MODE
最大输入电压:38 V最小输入电压:4.5 V
标称输入电压:15 VJESD-30 代码:R-PQCC-N38
JESD-609代码:e3长度:7 mm
湿度敏感等级:1功能数量:2
端子数量:38最高工作温度:85 °C
最低工作温度:封装主体材料:PLASTIC/EPOXY
封装代码:HVQCCN封装形状:RECTANGULAR
封装形式:CHIP CARRIER, HEAT SINK/SLUG, VERY THIN PROFILE峰值回流温度(摄氏度):NOT SPECIFIED
座面最大高度:0.8 mm表面贴装:YES
切换器配置:PHASE-SHIFT最大切换频率:550 kHz
技术:CMOS温度等级:OTHER
端子面层:Matte Tin (Sn)端子形式:NO LEAD
端子节距:0.5 mm端子位置:QUAD
处于峰值回流温度下的最长时间:NOT SPECIFIED宽度:5 mm
Base Number Matches:1

LTC3876EUHF#TRPBF 数据手册

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LTC3876  
Dual DC/DC Controller for  
DDR Power with Differential VDDQ  
Sensing and ±±50m VTT Referenꢀe  
DESCRIPTION  
FEATURES  
The LTC®3876 is a complete DDR power solution, com-  
patible with DDR1, DDR2, DDR3 and future DDRX lower  
voltage standards. The LTC3876 includes VDDQ and VTT  
DC/DC controllers and a precision linear VTT reference. A  
differential output sense amplifier and precision internal  
reference combine to offer an accurate VDDQ supply. The  
VTT controller tracks the precision VTTR linear reference  
with less than 20mV total DC error. The precision VTTR  
referencemaintains1.2%regulationaccuracytrackingone-  
half VDDQ over temperature for a ±±0mA reference load.  
n
Ctmnleꢁe DDR Ptwer StlpꢁitI wiꢁh VTT RefereIce  
n
n
n
n
n
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Wide V RaIge: ꢀ.5V ꢁt 38V, VDDQ: 1V ꢁt 2.5V  
ꢂN  
0.ꢃ7ꢄ VDDQ ꢅpꢁnpꢁ Vtlꢁage Accpracy  
VDDQ aId VTT TermiIaꢁitI CtIꢁrtllers  
1.2ꢄ 50mA ꢆiIear VTTR RefereIce ꢅpꢁnpꢁ  
CtIꢁrtlled ꢅI-Time, Valley CprreIꢁ Mtde CtIꢁrtl  
FreqpeIcy Prtgrammable frtm 200kHz ꢁt 2MHz  
SyIchrtIizable ꢁt ExꢁerIal Cltck  
n
n
n
n
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= 30Is, ꢁ  
= 90Is  
ꢅN(MꢂN)  
ꢅFF(MꢂN)  
R
or Inductor DCR Current Sensing  
SENSE  
Power Good Output Voltage Monitor  
Overvoltage Protection and Current Limit Foldback  
Thermally Enhanced 38-Pin (±mm × 7mm) QFN and  
TSSOP Packages  
TheLTC3876allowsoperationfrom4Vto38Vmaximum  
at the input. The VDDQ output can range from 1.0V to  
2.±V, with a corresponding VTT and VTTR output range  
of 0.±V to 1.2±V. Voltage tracking soft-start, PGOOD and  
fault protection features are provided.  
APPLICATIONS  
L, LT, LTC, LTM, Linear Technology, OPTI-LOOP, and the Linear logo are registered trademarks  
and Hot Swap and No R  
are trademarks of Linear Technology Corporation. All other  
SENSE  
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trademarks are the property of their respective owners. Protected by U.S. Patents including  
±481178, ±487±±4, 6±802±8, 6304066, 6476±89, 6774611.  
Motherboard Memory  
Servers  
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TYPICAL APPLICATION  
DDR3 1.5V VDDQ/20A 0.75VTT/ 10A ꢀ.5V ꢁt 1ꢀV ꢂInpꢁ  
V
IN  
EfficieIcy/Ptwer ꢆtss  
V
4.±V TO  
14V  
IN  
LTC3876  
+
VDDR ChaIIel 1  
SENSE1  
SENSE1  
SENSE2  
C
0.1μF  
1±k  
0.1μF  
IN1  
+
SENSE2  
100  
90  
80  
70  
60  
±0  
40  
4.±  
180μF  
1±k  
V
= 12V  
0.1μF  
0.1μF  
IN  
w2  
VDDQ = 1.±V  
4.0  
3.±  
BOOST1  
TG1  
BOOST2  
TG2  
3.±7k  
L2  
0.47μH  
3.±7k  
MT1  
L1  
0.47μH  
MT2  
MB2  
VTT  
0.7±V  
±10A  
1.±V, 20A  
VDDQ  
DISCONTINUOUS  
MODE  
3.0  
2.±  
2.0  
SW1  
SW2  
DB1  
DB2  
DRV  
CC1  
DRV  
CC2  
C
OUT4  
330μF  
C
OUT2  
330μF  
INTV  
CC  
C
OUT3  
100μF  
1μF  
4.7μF  
w2  
1.±  
1.0  
0.±  
0
C
OUT1  
100μF  
30.1k  
MB1  
BG1  
BG2  
FORCED  
CONTINUOUS  
MODE  
PGND  
20k  
+
V
1μF  
OUTSENSE1  
VTTRVCC  
VTTSNS  
VTTR  
0.1  
1
10  
V
OUTSENSE1  
100k  
LOAD CURRENT (A)  
PGOOD  
0.1μF  
PGOOD  
VTTR  
±±0mA  
3876 TA01b  
TRACK/SS1  
2.2μF  
1±k  
1±k  
1000pF  
100k  
1000pF  
ITH1  
RT  
ITH2  
SGND  
RUN  
3876 TA01a  
3876f  
1

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