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LTC3729EG

更新时间： 2024-11-12 22:55:55
品牌 Logo 应用领域
凌特 - Linear 稳压器开关
页数 文件大小 规格书
28页 343K
描述
550kHz, PolyPhase, High Efficiency, Synchronous Step-Down Switching Regulator

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中文翻译

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LTC3729EG 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, SSOP28,.3
针数：28Reach Compliance Code：not_compliant
ECCN代码：EAR99HTS代码：8542.39.00.01
风险等级：5.12模拟集成电路 - 其他类型：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 VJESD-30 代码：R-PDSO-G28
JESD-609代码：e0长度：10.2 mm
湿度敏感等级：1功能数量：1
端子数量：28最高工作温度：85 °C
最低工作温度：-40 °C最大输出电流：5 A
封装主体材料：PLASTIC/EPOXY封装代码：SSOP
封装等效代码：SSOP28,.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：1.99 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：590 kHz
技术：CMOS温度等级：INDUSTRIAL
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：5.29 mm
Base Number Matches：1

LTC3729EG 数据手册

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LTC3729  
550kHz, PolyPhase,  
High Efficiency, Synchronous  
Step-Down Switching Regulator  
U
DESCRIPTIO  
FEATURES  
The LTC®3729 is a multiple phase, synchronous step-  
down current mode switching regulator controller that  
drives N-channel external power MOSFET stages in a  
phase-lockablefixedfrequencyarchitecture.ThePolyPhase  
■
Wide VIN Range: 4V to 36V Operation  
■
Reduces Required Input Capacitance and Power  
Supply Induced Noise  
■
■
■
■
■
■
■
■
■
■
■
■
■
■
±1% Output Voltage Accuracy  
Phase-Lockable Fixed Frequency: 250kHz to 550kHz controller drives its two output stages out of phase at  
True Remote Sensing Differential Amplifier  
PolyPhaseTM Extends from Two to Twelve Phases  
Reduces the Size and Value of Inductors  
Current Mode Control Ensures Current Sharing  
1.1MHz Effective Switching Frequency (2-Phase)  
OPTI-LOOP® Compensation Reduces COUT  
Power Good Output Voltage Indicator  
Very Low Dropout Operation: 99% Duty Cycle  
Adjustable Soft-Start Current Ramping  
Internal Current Foldback Plus Shutdown Timer  
Overvoltage Soft-Latch Eliminates Nuisance Trips  
Available in 5mm × 5mm QFN  
frequencies up to 550kHz to minimize the RMS ripple  
currents in both input and output capacitors. The output  
clock signal allows expansion for up to 12 evenly phased  
controllers for systems requiring 15A to 200A of output  
current. The multiple phase technique effectively multi-  
plies the fundamental frequency by the number of chan-  
nels used, improving transient response while operating  
each channel at an optimum frequency for efficiency.  
Thermal design is also simplified.  
An internal differential amplifier provides true remote  
sensing of the regulated supply’s positive and negative  
output terminals as required for high current applications.  
and 28-Lead SSOP Packages  
A RUN/SS pin provides both 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 over a  
wide range of output capacitance and ESR values. The  
LTC3729 includes a power good output pin that indicates  
when the output is within±7.5% of the designed set point.  
U
APPLICATIO S  
■
Desktop Computers/Servers  
■
Large Memory Arrays  
■
DC Power Distribution Systems  
, LTC and LT are registered trademarks of Linear Technology Corporation.  
OPTI-LOOP is a registered trademark of Linear Technology Corporation.  
PolyPhase is a trademark of Linear Technology Corporation.  
U
TYPICAL APPLICATIO  
V
IN  
5V TO 28V  
0.1µF  
10Ω  
S
10µF  
35V  
CERAMIC  
×4  
M1  
S
LTC3729  
V
TG1  
BOOST1  
SW1  
IN  
0.002Ω  
0.47µF  
0.1µF  
L1  
0.8µH  
S
M2  
×2  
D1  
RUN/SS  
PGOOD  
BG1  
PGND  
+
SENSE1  
SENSE1  
I
TH  
–
3.3k  
16k  
1000pF  
16k  
M3  
TG2  
BOOST2  
SW2  
S
S
S
0.002Ω  
SGND  
V
OUT  
1.6V/40A  
0.47µF  
L2  
0.8µH  
S
S
S
M4  
×2  
V
BG2  
DIFFOUT  
D2  
EAIN  
–
INTV  
CC  
+
10µF  
+
C
OUT  
V
V
SENSE2  
SENSE2  
OS  
OS  
1000µF ×2  
+
–
4V  
C
: T510E108K004AS  
L1, L2: CEPH149-IROMC  
M1, M3: IRF7811W  
M2, M4: IRF7822  
OUT  
3729 TA01  
D1, D2: UP5840  
Figure 1. High Current Dual Phase Step-Down Converter  
sn3729 3729fas  
1
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中文翻译

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