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LTC1709EG-9 PDF预览

LTC1709EG-9

更新时间： 2024-09-23 22:25:55
品牌 Logo 应用领域
凌特 - Linear 稳压器开关式稳压器或控制器电源电路开关式控制器光电二极管
页数 文件大小 规格书
28页 299K
描述
2-Phase, 5-Bit VID, Current Mode, High Efficiency, Synchronous Step-Down Switching Regulators

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LTC1709EG-9 技术参数

是否Rohs认证：不符合生命周期：Transferred
零件包装代码：SSOP包装说明：SSOP, SSOP36,.3
针数：36Reach Compliance Code：not_compliant
ECCN代码：EAR99HTS代码：8542.39.00.01
风险等级：5.16Is Samacsys：N
模拟集成电路 - 其他类型：DUAL SWITCHING CONTROLLER控制模式：CURRENT-MODE
控制技术：PULSE WIDTH MODULATION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：R-PDSO-G36JESD-609代码：e0
长度：12.8 mm湿度敏感等级：1
功能数量：1端子数量：36
最高工作温度：70 °C最低工作温度：
最大输出电流：3 A封装主体材料：PLASTIC/EPOXY
封装代码：SSOP封装等效代码：SSOP36,.3
封装形状：RECTANGULAR封装形式：SMALL OUTLINE, SHRINK PITCH
峰值回流温度（摄氏度）：235认证状态：Not Qualified
座面最大高度：2 mm子类别：Switching Regulator or Controllers
表面贴装：YES切换器配置：BUCK
最大切换频率：360 kHz技术：CMOS
温度等级：COMMERCIAL端子面层：Tin/Lead (Sn/Pb)
端子形式：GULL WING端子节距：0.65 mm
端子位置：DUAL处于峰值回流温度下的最长时间：20
宽度：5.3 mmBase Number Matches：1

LTC1709EG-9 数据手册

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Final Electrical Specifications  
LTC1709-8/LTC1709-9  
2-Phase, 5-Bit VID,  
Current Mode, High Efficiency,  
Synchronous Step-Down Switching Regulators  
May 2000  
U
DESCRIPTIO  
FEATURES  
The LTC®1709-8/LTC1709-9 are 2-phase, VID program-  
mable, synchronous step-down switching regulator con-  
trollersthatdrivetwoallN-channelexternalpowerMOSFET  
stages in a fixed frequency architecture. The 2-phase  
controller drives its two output stages out of phase at  
■
Single Controller Operates Two Output Stages:  
Antiphase Reducing Required Input Capacitance  
and Power Supply Induced Noise  
■
Two 5-Bit Desktop VID Codes:  
LTC1709-8 For VRM8.4 (VOUT from 1.3V to 3.5V)  
LTC1709-9 For VRM9.0 (VOUT from 1.1V to 1.85V) frequencies up to 300kHz to minimize the RMS ripple  
■
■
■
■
■
■
■
■
■
■
■
■
Current Mode Control Ensures Best Current Sharing  
True Remote Sensing Differential Amplifier  
Power Good Output Indicator  
currents in both input and output capacitors. The 2-phase  
techniqueeffectivelymultipliesthefundamentalfrequency  
by two, improving transient response while operating  
each channel at an optimum frequency for efficiency.  
Thermal design is also simplified.  
OPTI-LOOPTM Compensation Minimizes COUT  
Programmable Fixed Frequency: 150kHz to 300kHz  
±1% Output Voltage Accuracy  
An internal differential amplifier provides true remote  
sensing of the regulated supply’s positive and negative  
output terminals as required for high current applications.  
Wide VIN Range: 4V to 36V Operation  
Adjustable Soft-Start Current Ramping  
Internal Current Foldback and Short-Circuit Shutdown  
Overvoltage Soft Latch Eliminates Nuisance Trips  
Low Shutdown Current: 20µA  
The RUN/SS pin provides soft-start and optional timed,  
short-circuit shutdown. Current foldback limits MOSFET  
dissipation during short-circuit conditions when the  
overcurrent latchoff is disabled. OPTI-LOOP compensa-  
tion allows the transient response to be optimized for a  
wide range of output capacitors and ESR values. The  
LTC1709-8/LTC1709-9 implement two different VID  
tables compliant with VRM8.4 and VRM9.0 respectively.  
Available in 36-LUead SSOP Package  
APPLICATIO S  
■
Workstations  
Internet Servers  
Large Memory Arrays  
DC Power Distribution Systems  
■
■
, LTC and LT are registered trademarks of Linear Technology Corporation.  
OPTI-LOOP is a trademark of Linear Technology Corporation.  
■
U
TYPICAL APPLICATIO  
V
IN  
5V TO 28V  
+
10µF  
35V  
×4  
0.1µF  
V
IN  
TG1  
S
0.002Ω  
RUN/SS  
BOOST1  
SW1  
0.47µF  
220pF  
3.3k  
1µH  
S
LTC1709-8  
I
BG1  
TH  
SGND  
PGND  
+
SENSE1  
SENSE1  
PGOOD  
–
5 VID BITS VID0–VID4  
TG2  
BOOST2  
SW2  
0.002Ω  
V
OUT  
1.3V TO 3.5V  
40A  
EAIN  
0.47µF  
1µH  
ATTENOUT  
ATTENIN  
BG2  
V
V
V
INTV  
DIFFOUT  
CC  
+
10µF  
C
OUT  
+
–
SENSE2  
SENSE2  
OS  
1000µF  
4V  
+
–
OS  
×2  
17097 F01  
Figure 1. High Current Dual Phase Step-Down Converter  
Information furnished by Linear Technology Corporation is believed to be accurate and reliable.  
However, no responsibility is assumed for its use. Linear Technology Corporation makes no represen-  
tationthattheinterconnectionofitscircuitsasdescribedhereinwillnotinfringeonexistingpatentrights.  
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