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LTC1876EG#TR

更新时间： 2024-01-16 13:17:14
品牌 Logo 应用领域
凌特 - Linear 控制器
页数 文件大小 规格书
24页 254K
描述
LTC1876 - High Efficiency, 2-Phase, Dual Synchronous Step-Down Switching Controller and Step-Up Regulator; Package: SSOP; Pins: 36; Temperature Range: -40°C to 85°C

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中文翻译

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LTC1876EG#TR 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：36Reach Compliance Code：compliant
ECCN代码：EAR99HTS代码：8542.39.00.01
风险等级：5.16模拟集成电路 - 其他类型：SWITCHING CONTROLLER
控制模式：CURRENT-MODE控制技术：PHASE-SHIFT CONTROL
最大输入电压：36 V最小输入电压：3.5 V
标称输入电压：15 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：85 °C
最低工作温度：-40 °C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）：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：360 kHz
技术：CMOS温度等级：INDUSTRIAL
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

LTC1876EG#TR 数据手册

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LTC1778/LTC1778-1  
Wide Operating Range,  
No RSENSETM Step-Down Controller  
U
FEATURES  
DESCRIPTIO  
The LTC®1778 is a synchronous step-down switching  
regulator controller optimized for CPU power. The con-  
troller uses a valley current control architecture to deliver  
very low duty cycles with excellent transient response  
without requiring a sense resistor. Operating frequency is  
selected by an external resistor and is compensated for  
variations in VIN.  
■
No Sense Resistor Required  
■
True Current Mode Control  
■
Optimized for High Step-Down Ratios  
■
t
ON(MIN) ≤ 100ns  
■
■
■
■
■
■
■
■
■
■
■
■
■
■
Extremely Fast Transient Response  
Stable with Ceramic COUT  
Dual N-Channel MOSFET Synchronous Drive  
Power Good Output Voltage Monitor (LTC1778)  
Adjustable On-Time (LTC1778-1)  
Wide VIN Range: 4V to 36V  
±1% 0.8V Voltage Reference  
Adjustable Current Limit  
Adjustable Switching Frequency  
Programmable Soft-Start  
Output Overvoltage Protection  
Optional Short-Circuit Shutdown Timer  
Micropower Shutdown: IQ < 30µA  
Available in a 16-Pin Narrow SSOP Package  
U
Discontinuous mode operation provides high efficiency  
operation at light loads. A forced continuous control pin  
reduces noise and RF interference, and can assist second-  
ary winding regulation by disabling discontinuous opera-  
tion when the main output is lightly loaded.  
Fault protection is provided by internal foldback current  
limiting, an output overvoltage comparator and optional  
short-circuitshutdowntimer.Soft-startcapabilityforsup-  
ply sequencing is accomplished using an external timing  
capacitor.Theregulatorcurrentlimitlevelisuserprogram-  
mable.Widesupplyrangeallowsoperationfrom4Vto36V  
at the input and from 0.8V up to (0.9)VIN at the output.  
, LTC and LT are registered trademarks of Linear Technology Corporation.  
APPLICATIO S  
■
Notebook and Palmtop Computers  
Distributed Power Systems  
No R  
is a trademark of Linear Technology Corporation.  
SENSE  
All other trademarks are the property of their respective owners.  
■
Protected by U.S. Patents, including 5481178, 6100678, 6580258, 5847554, 6304066  
U
TYPICAL APPLICATIO  
R
ON  
Efficiency vs Load Current  
1.4MΩ  
I
ON  
100  
C
SS  
V
= 2.5V  
OUT  
V
IN  
0.1µF  
V
IN  
V
= 5V  
IN  
5V TO 28V  
C
IN  
M1  
10µF  
50V  
×3  
RUN/SS  
TG  
Si4884  
L1  
90  
80  
70  
60  
C
C
1.8µH  
V
OUT  
SW  
500pF  
2.5V  
10A  
C
0.22µF  
V
= 25V  
B
IN  
C
I
TH  
BOOST  
OUT  
+
D
180µF  
4V  
B
R
C
20k  
LTC1778  
SGND INTV  
CMDSH-3  
×2  
CC  
M2  
Si4874  
D1  
B340A  
BG  
+
C
VCC  
4.7µF  
R2  
30.1k  
PGOOD PGND  
V
FB  
0.01  
1
10  
0.1  
R1  
14k  
LOAD CURRENT (A)  
1778 F01b  
1778 F01a  
Figure 1. High Efficiency Step-Down Converter  
1778fb  
1
1234567...24

中文翻译

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