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LTC3731CG#PBF PDF预览

LTC3731CG#PBF

更新时间： 2024-11-13 20:05:23
品牌 Logo 应用领域
凌特 - Linear 开关光电二极管
页数 文件大小 规格书
34页 367K
描述
LTC3731 - 3-Phase, 600kHz, Synchronous Buck Switching Regulator Controller; Package: SSOP; Pins: 24; Temperature Range: 0°C to 70°C

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中文翻译

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LTC3731CG#PBF 技术参数

是否Rohs认证： 符合生命周期：Transferred
零件包装代码：SSOP包装说明：SSOP, SSOP36,.3
针数：24Reach Compliance Code：compliant
ECCN代码：EAR99HTS代码：8542.39.00.01
风险等级：3.37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：32 V最小输入电压：4.5 V
标称输入电压：5 VJESD-30 代码：R-PDSO-G36
JESD-609代码：e3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：5 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）：260
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：PHASE-SHIFT最大切换频率：750 kHz
技术：CMOS温度等级：COMMERCIAL
端子面层：Matte Tin (Sn)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：30宽度：5.3 mm
Base Number Matches：1

LTC3731CG#PBF 数据手册

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LTC3731  
3-Phase, 600kHz,  
Synchronous Buck Switching  
Regulator Controller  
FEATURES  
DESCRIPTION  
The LTC®3731 is a PolyPhase® synchronous step-down  
switching regulator controller that drives all N-channel  
external power MOSFET stages in a phase-lockable fixed  
frequency architecture. The 3-phase controller drives its  
output stages with 120° phase separation at frequencies  
of up to 600kHz per phase to minimize the RMS current  
losses in both the input and output filter capacitors. The  
3-phase technique effectively triples the fundamental fre-  
quency,improvingtransientresponsewhileoperatingeach  
controlleratanoptimalfrequencyforefficiencyandeaseof  
thermaldesign.Lightloadefficiencyisoptimizedbyusinga  
choice of output Stage Shedding or Burst Mode operation.  
n
3-Phase Current Mode Controller with Onboard  
MOSFET Drivers  
n
±±5 Outꢀut Current Matꢁhinꢂ Oꢀtiꢃiꢄes Therꢃal  
Perforꢃanꢁe and Siꢄe of Induꢁtors and MOSFETs  
n
Differential Aꢃꢀlifier Aꢁꢁurately Senses V  
OUT  
n
n
n
n
n
n
n
n
n
n
n
n
1ꢀ ꢁ Accuracy Over Temperature  
REF  
ꢁ
ꢁ
Range: 0.6ꢁ to 5.5ꢁ without Diffamp  
Range: 0.6ꢁ to (ꢁ – 1.2ꢁ) with Diffamp  
OUT  
OUT  
CC  
250kHz to 600kHz Per Phase, PLL, Fixed Frequency  
PWM, Stage Shedding™ or Burst Mode® Operation  
OPTI-LOOP® Compensation Minimizes C  
OUT  
Adjustable Soft-Start Current Ramping  
Short-Circuit Shutdown Timer with Defeat Option  
Overvoltage Soft Latch  
Adjustable Undervoltage Lockout Threshold  
Selectable Phase Output for Up to 12-Phase Operation  
Available in 5mm × 5mm QFN and 36-Pin Narrow  
(0.209") SSOP Packages  
A differential amplifier provides true remote sensing of  
both the high and low side of the output voltage at the  
point of load.  
Soft-startandadefeatable, timedshort-circuitshutdown  
protect the MOSFETs and the load. Current foldback  
provides protection for the external MOSFETs under  
short-circuit or overload conditions.  
L, LT, LTC, LTM, Bust Mode, OPTI-LOOP, PolyPhase, Linear Technology and the Linear logo  
are registered and Stage Shedding is a trademark of Linear Technology Corporation. All other  
trademarks are the property of their respective owners. Protected by U.S. Patents, including  
5481178, 5929620, 6177787, 6144194, 6100678, 5408150, 6580258, 6462525, 630466,  
5705919.  
APPLICATIONS  
n
Desktop Computers and Servers  
n
High Performance Notebook Computers  
n
High Output Current DC/DC Power Supplies  
TYPICAL APPLICATION  
V
IN  
5V TO 28V  
V
CC  
V
TG1  
SW1  
BG1  
CC  
+
0.8µH  
0.8µH  
4.5V TO 7V  
10µF  
0.003Ω  
0.003Ω  
22µF  
35V  
LTC3731  
BOOST1  
BOOST2  
BOOST3  
+
SENSE1  
0.1µF  
–
SENSE1  
V
V
SW3 SW2 SW1  
IN  
TG2  
PGOOD  
PLLIN  
POWER GOOD INDICATOR  
OPTIONAL SYNC IN  
V
OUT  
SW2  
BG2  
1.35V  
55A  
PLLFLTR  
PGND  
36k  
V
IN  
UVADJ  
+
SENSE2  
12k  
–
680pF  
SENSE2  
IN  
I
TH  
TG3  
SW3  
BG3  
0.8µH  
0.003Ω  
5k  
RUN/SS  
0.01µF  
SGND  
EAIN  
100pF  
7.5k  
+
SENSE3  
DIFFOUT  
IN  
IN  
–
–
+
SENSE3  
+
C
OUT  
470µF  
6.04k  
4V  
3731 F01  
Fiꢂure 1. Hiꢂh Current Triꢀle Phase Steꢀ-Down Converter  
3731fc  
1
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中文翻译

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