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LTC3618IUF#TRPBF PDF预览

LTC3618IUF#TRPBF

更新时间： 2024-11-25 19:37:39
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
24页 614K
描述
LTC3618 - Dual 4MHz, ±3A Synchronous Buck Converter for DDR Termination; Package: QFN; Pins: 24; Temperature Range: -40°C to 85°C

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中文翻译

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LTC3618IUF#TRPBF 技术参数

是否Rohs认证：符合生命周期：Transferred
零件包装代码：QFN包装说明：HVQCCN, LCC24,.16SQ,20
针数：24Reach Compliance Code：compliant
ECCN代码：EAR99HTS代码：8542.39.00.01
风险等级：6.97Is Samacsys：N
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：5.5 V最小输入电压：2.25 V
标称输入电压：3.3 VJESD-30 代码：S-PQCC-N24
JESD-609代码：e3长度：4 mm
湿度敏感等级：1功能数量：1
端子数量：24最高工作温度：125 °C
最低工作温度：-40 °C最大输出电流：8 A
封装主体材料：PLASTIC/EPOXY封装代码：HVQCCN
封装等效代码：LCC24,.16SQ,20封装形状：SQUARE
封装形式：CHIP CARRIER, HEAT SINK/SLUG, VERY THIN PROFILE峰值回流温度（摄氏度）：225
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：PHASE-SHIFT最大切换频率：2700 kHz
技术：CMOS温度等级：AUTOMOTIVE
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：4 mm
Base Number Matches：1

LTC3618IUF#TRPBF 数据手册

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LTC3618  
Dual 4MHz, ±±3  
Synchronous Buck Converter  
for DDR Termination  
FeaTures  
DescripTion  
DDR Power Supply, Termination and Reference  
The LTC®3618 is a dual synchronous step-down regulator  
using a current mode, constant-frequency architecture. It  
provides a complete DDR solution with an input voltage  
range from 2.25V to 5.5V.  
n
n
High Efficiency: Up to 94%  
n
Dual Outputs with ±±3 Output Current Capaꢀility  
n
2.25V to 5.5V Input Voltage Range  
±ꢁ% Output Voltage 3ccuracy  
n
The output of the first step-down regulator offers a high  
n
V
Output Voltage Down to 0.5V  
TT  
accuracy V  
supply. A buffered reference generates  
DDQ  
n
n
n
n
n
n
Shutdown Current ≤1µA  
VTTR at 50% of VDDQIN and drives loads up to 10mA.  
The second regulator generates the DDR termination volt-  
VTTR = VDDQIN/2, V = VTTR  
FB2  
Adjustable Switching Frequency Up to 4MHz  
Internal or External Compensation  
age (V ) equal to VTTR. Both regulators are capable of  
TT  
delivering 3Aofloadcurrentat1MHzswitchingfrequency.  
Selectable 0°/90°/180° Phase Shift Between Channels  
The operating frequency is externally programmable up to  
4MHz, allowing the use of small surface mount inductors.  
0°, 90°, or 180° of phase shift between the two channels  
can be selected to minimize input current ripple. For  
switching noise-sensitive applications, the LTC3618 can  
be synchronized to an external clock up to 4MHz.  
Internal or External Soft-Start for V , Internal  
DDQ  
Soft-Start for V  
TT  
n
n
Power Good Status Outputs  
Low Profile 4mm × 4mm QFN-24 and TSSOP-24  
Packages  
applicaTions  
The LTC3618 is offered in leadless 24-pin 4mm × 4mm  
QFN and thermally enhanced 24-pin TSSOP packages.  
L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks of Linear  
Technology Corporation. All other trademarks are the property of their respective owners.  
Protected by U.S. Patents, including 5481178, 6498466, 6580258, 6611131.  
n
DDR Memory  
Supports DDR, DDR2, and DDR3 Standards  
n
n
Tracking Supplies  
Typical applicaTion  
V
IN  
Efficiency and Power Loss vs Load Current  
3.3V  
100µF  
100  
90  
80  
70  
60  
50  
40  
30  
20  
10  
0
10  
SV  
PV  
PV  
IN2  
IN  
IN1  
VDDQIN  
V
= 1.8V  
RUN1  
DDQ  
1µH  
1µH  
V
DDQ  
1.8V/3A  
47µF  
TRACK/SS1  
PGOOD1  
ITH1  
SW1  
1
422k  
210k  
LTC3618  
V
TT  
= 0.9V  
FB1  
RT  
MODE/SYNC  
PHASE  
392k  
V
TT  
0.1  
SW2  
FB2  
0.9V/ 3A  
47µF  
RUN2  
PGOOD2  
ITH2  
0.01  
10  
0.01  
0.1  
1
V
DDQ  
V
=
LOAD CURRENT (A)  
VTTR  
REF  
3618 TA01b  
2
SGND  
PGND  
3618 TA01a  
0.01µF  
3618fc  
1
For more information www.linear.com/LTC3618  
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