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LTC3717EUH-1 PDF预览

LTC3717EUH-1

更新时间: 2024-11-11 03:23:55
品牌 Logo 应用领域
凌特 - Linear 存储开关双倍数据速率控制器
页数 文件大小 规格书
20页 268K
描述
Wide Operating Range, No RSENSE TM Step-Down Controller for DDR/QDR Memory Termination

LTC3717EUH-1 技术参数

是否Rohs认证: 不符合生命周期:Transferred
零件包装代码:QFN包装说明:VQCCN, LCC32,.2SQ,20
针数:32Reach Compliance Code:not_compliant
ECCN代码:EAR99HTS代码:8542.39.00.01
风险等级:5.31模拟集成电路 - 其他类型:SWITCHING CONTROLLER
控制模式:CURRENT-MODE最大输入电压:36 V
最小输入电压:4 V标称输入电压:15 V
JESD-30 代码:S-PQCC-N32JESD-609代码:e0
长度:5 mm湿度敏感等级:1
功能数量:1端子数量:32
最高工作温度:70 °C最低工作温度:
最大输出电流:2 A封装主体材料:PLASTIC/EPOXY
封装代码:VQCCN封装等效代码:LCC32,.2SQ,20
封装形状:SQUARE封装形式:CHIP CARRIER, VERY THIN PROFILE
峰值回流温度(摄氏度):235认证状态:Not Qualified
座面最大高度:0.8 mm子类别:Switching Regulator or Controllers
表面贴装:YES切换器配置:PUSH-PULL
最大切换频率:1500 kHz技术:CMOS
温度等级:COMMERCIAL端子面层:Tin/Lead (Sn/Pb)
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:20
宽度:5 mm

LTC3717EUH-1 数据手册

 浏览型号LTC3717EUH-1的Datasheet PDF文件第2页浏览型号LTC3717EUH-1的Datasheet PDF文件第3页浏览型号LTC3717EUH-1的Datasheet PDF文件第4页浏览型号LTC3717EUH-1的Datasheet PDF文件第5页浏览型号LTC3717EUH-1的Datasheet PDF文件第6页浏览型号LTC3717EUH-1的Datasheet PDF文件第7页 
LTC3717-1  
Wide Operating Range,  
No RSENSETM Step-Down Controller  
for DDR/QDR Memory Termination  
U
DESCRIPTIO  
FEATURES  
The LTC®3717-1 is a synchronous step-down switching  
regulator controller for double data rate (DDR) and Quad  
Data RateTM (QDRTM) memory termination. The controller  
uses a valley current control architecture to deliver very  
lowdutycycleswithorwithoutasenseresistor. Operating  
frequency is selected by an external resistor and is com-  
VOUT = 1/2 VREF  
Adjustable and Symmetrical Sink/Source  
Current Limit up to 20A  
True Current Mode Control with Optional Use of  
Sense Resistor  
VON and ION Pins Allow Constant Frequency  
Operation During Input and Output Voltage Changes  
±0.65% Output Voltage Accuracy  
Up to 97% Efficiency  
pensated for variations in VIN and VOUT  
.
Forced continuous operation reduces noise and RF inter-  
ference. Output voltage is internally set to half of VREF  
which is user programmable.  
,
Ultrafast Transient Response  
2% to 90% Duty Cycle at 200kHz  
t
ON(MIN) 100ns  
Fault protection is provided by an output overvoltage  
comparator and optional short-circuit shutdown timer.  
Soft-start capability for supply sequencing is accom-  
plished using an external timing capacitor. The regulator  
current limit level is symmetrical and user programmable.  
Wide supply range allows operation from 4V to 36V at the  
VCC input.  
Stable with Ceramic COUT  
Power Good Output Voltage Monitor  
Wide VIN Range: 4V to 36V  
Adjustable Switching Frequency up to 1.5MHz  
Output Overvoltage Protection  
Optional Short-Circuit Shutdown Timer  
Available in a 5mm × 5mm QFN Package  
U
, LTC and LT are registered trademarks of Linear Technology Corporation.  
No RSENSE is a trademark of Linear Technology Corporation.  
QDR RAMs and Quad Data Rate RAMs comprise a new family of products developed by Cypress  
Semiconductor, Hitachi, IDT, Micron Technology, Inc. and Samsung.  
APPLICATIO S  
Bus Termination: DDR and QDR Memory, SSTL,  
HSTL, ...  
Notebook Computers, Desktop Servers  
Tracking/Margining Power Supply  
U
TYPICAL APPLICATIO  
V
CC  
5V TO 28V  
Efficiency vs Load Current  
715k  
1µF  
V
CC  
V
IN  
I
ON  
2.5V TO 5.5V  
100  
90  
80  
70  
60  
50  
40  
30  
20  
10  
0
V = 1.25V  
OUT  
+
+
150µF  
6.3V  
×2  
0.1µF  
V
DD  
= 2.5V  
V
REF  
Si7840DP  
Si7840DP  
RUN/SS  
TG  
B320A  
V
= 5V  
IN  
LTC3717-1  
SW  
V
OUT  
470pF  
V
IN  
= 2.5V  
+
20k  
SENSE  
BOOST  
1.25V  
0.22µF  
0.68µH  
I
TH  
±10A  
180µF  
4V  
×2  
CMDSH-3  
DRV  
SGND INTV  
CC  
CC  
V
ON  
BG  
B320A  
+
4.7µF  
PGOOD PGND  
SENSE  
37171 F01a  
V
FB  
0
2
4
6
8
10  
12  
14  
LOAD CURRENT (A)  
37171 F01b  
Figure 1. High Efficiency DDR Memory Termination Supply  
sn37171 37171fs  
1

LTC3717EUH-1 替代型号

型号 品牌 替代类型 描述 数据表
LTC3717EUH-1#PBF Linear

完全替代

LTC3717-1 - Wide Operating Range, No RSENSE Step-Down Controller for DDR/QDR Memory Termin

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