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LTC3736EGN-2 PDF预览

LTC3736EGN-2

更新时间： 2024-09-24 05:43:55
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 409K
描述
Dual 2-Phase, No RSENSE Synchronous Controller with Output Tracking

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中文翻译

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LTC3736EGN-2 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：0.150 INCH, PLASTIC, SSOP-24
针数：24Reach Compliance Code：not_compliant
ECCN代码：EAR99HTS代码：8542.39.00.01
风险等级：5.19Is 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：9.8 V
最小输入电压：2.75 V标称输入电压：4.2 V
JESD-30 代码：R-PDSO-G24JESD-609代码：e0
长度：8.2 mm湿度敏感等级：1
功能数量：1端子数量：24
最高工作温度：85 °C最低工作温度：
最大输出电流：1 A封装主体材料：PLASTIC/EPOXY
封装代码：SSOP封装等效代码：SSOP24,.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：PUSH-PULL
最大切换频率：825 kHz技术：CMOS
温度等级：OTHER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

LTC3736EGN-2 数据手册

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LTC3736-2  
TM  
Dual 2-Phase, No RSENSE  
,
Synchronous Controller  
with Output Tracking  
U
FEATURES  
DESCRIPTIO  
TheLTC®3736-2isa2-phasedualsynchronousstep-down  
switching regulator controller with tracking that drives ex-  
ternalcomplementarypowerMOSFETsusingfewexternal  
components. The constant frequency current mode archi-  
tecture with MOSFET VDS sensing eliminates the need for  
sense resistors and improves efficiency. Power loss and  
noise due to the ESR of the input capacitance are mini-  
mized by operating the two controllers out of phase.  
■
No Current Sense Resistors Required  
■
Out-of-Phase Controllers Reduce Required  
Input Capacitance  
Tracking Function  
■
■
Wide VIN Range: 2.75V to 9.8V  
■
0.6V ±1% Voltage Reference  
■
High Current Limit  
■
Constant Frequency Current Mode Operation  
■
Low Dropout Operation: 100% Duty Cycle  
Pulse-skipping operation provides high efficiency at light  
loads. 100% duty cycle capability provides low dropout  
operation, extending operating time in battery-powered  
systems.  
■
True PLL for Frequency Locking or Adjustment  
■
Selectable Pulse-Skipping/Forced Continuous  
Operation  
■
Auxiliary Winding Regulation  
■
■
■
■
■
Theswitchingfrequencycanbeprogrammedupto750kHz,  
allowing the use of small surface mount inductors and ca-  
pacitors. For noise sensitive applications, the LTC3736-2  
switching frequency can be externally synchronized from  
250kHz to 850kHz. An internal soft-start, which can be  
lengthened externally, smoothly ramps the output voltage  
during start-up.  
Internal Soft-Start Circuitry  
Power-Good Output Voltage Monitor  
Output Overvoltage Protection  
Micropower Shutdown: IQ = 9µA  
Tiny Low Profile (4mm × 4mm) QFN and Narrow  
SSOP Packages U  
APPLICATIO S  
The LTC3736-2 is available in the tiny thermally enhanced  
(4mm × 4mm) QFN and 24-lead narrow SSOP packages.  
■
One or Two Lithium-Ion Powered Devices  
Notebook and Palmtop Computers, PDAs  
Portable Instruments  
Distributed DC Power Systems  
■
, LTC and LT are registered trademarks of Linear Technology Corporation.  
No R  
is a trademark of Linear Technology Corporation. All other trademarks are the  
SENSE  
■
property of their respective owners. Protected by U.S. Patents, including 5481178,  
5929620, 6144194, 6580258, 6304066, 6611131, 6498466.  
■
U
TYPICAL APPLICATIO  
Efficiency and Power Loss  
vs Load Current (Figure 15 Circuit)  
High Efficiency, 2-Phase, Dual Synchronous DC/DC Step-Down Converter  
V
IN  
2.75V TO 9.8V  
100  
95  
90  
85  
80  
75  
70  
65  
60  
55  
50  
10  
V
OUT  
= 2.5V  
10µF  
×2  
V
+
IN  
+
SENSE1 SENSE2  
EFFICIENCY  
1
TG1  
TG2  
2.2µH  
2.2µH  
SW1  
SW2  
LTC3736-2  
0.1  
0.01  
0.001  
POWER LOSS  
BG1  
BG2  
PGND  
PGND  
118k  
187k  
V
OUT1  
2.5V  
V
OUT2  
1.8V  
V
FB1  
V
FB2  
I
I
TH1  
TH2  
220pF  
15k  
220pF  
59k  
SGND  
47µF  
47µF  
1
10  
100  
1000  
10000  
15k  
59k  
LOAD CURRENT (mA)  
37362 TA01b  
37362 TA01a  
37362fa  
1
1234567...28

中文翻译

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