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LTC1735CS-1 PDF预览

LTC1735CS-1

更新时间: 2024-01-23 16:16:50
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 335K
描述
High Efficiency Synchronous Step-Down Switching Regulator

LTC1735CS-1 技术参数

是否Rohs认证: 不符合生命周期:Active
包装说明:SOP,Reach Compliance Code:not_compliant
ECCN代码:EAR99HTS代码:8542.39.00.01
风险等级:5.08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:3.5 V
标称输入电压:15 VJESD-30 代码:R-PDSO-G16
JESD-609代码:e0长度:9.9 mm
湿度敏感等级:1功能数量:1
端子数量:16最高工作温度:85 °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:SOP
封装形状:RECTANGULAR封装形式:SMALL OUTLINE
峰值回流温度(摄氏度):235认证状态:Not Qualified
座面最大高度:1.75 mm表面贴装:YES
切换器配置:PUSH-PULL最大切换频率:550 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:1.27 mm端子位置:DUAL
处于峰值回流温度下的最长时间:20宽度:3.9 mm
Base Number Matches:1

LTC1735CS-1 数据手册

 浏览型号LTC1735CS-1的Datasheet PDF文件第2页浏览型号LTC1735CS-1的Datasheet PDF文件第3页浏览型号LTC1735CS-1的Datasheet PDF文件第4页浏览型号LTC1735CS-1的Datasheet PDF文件第5页浏览型号LTC1735CS-1的Datasheet PDF文件第6页浏览型号LTC1735CS-1的Datasheet PDF文件第7页 
LTC1735-1  
High Efficiency  
Synchronous Step-Down  
Switching Regulator  
U
FEATURES  
DESCRIPTIO  
The LTC®1735-1 is a synchronous step-down switching  
regulatorcontrolleroptimizedforCPUpower. OPTI-LOOP  
compensation allows the transient response to be opti-  
mized over a wide range of output capacitance and ESR  
values.  
Dual N-Channel MOSFET Synchronous Drive  
Programmable/Synchronizable Fixed Frequency  
VOUT Range: 0.8V to 7V  
Wide VIN Range: 3.5V to 36V Operation  
Very Low Dropout Operation: 99% Duty Cycle  
OPTI-LOOPTM Compensation Minimizes COUT  
The operating frequency (synchronizable up to 500kHz) is  
set by an external capacitor allowing maximum flexibility  
in optimizing efficiency. The output voltage is monitored  
by a power good window comparator that indicates when  
the output is within 7.5% of its programmed value, con-  
forming to Intel Mobile CPU Specifications.  
±
1% Output Voltage Accuracy  
Power Good Output Voltage Monitor  
Internal Current Foldback  
Output Overvoltage Crowbar Protection  
Latched Short-Circuit Shutdown Timer  
with Defeat Option  
Optional Programmable Soft-Start  
Remote Output Voltage Sense  
Logic Controlled Micropower Shutdown: IQ < 25µA  
Protection features include internal foldback current lim-  
iting, output overvoltage crowbar and optional short-  
circuit shutdown. Soft-start is provided by an external  
capacitor that can be used to properly sequence supplies.  
The operating current level is user-programmable via an  
external current sense resistor. Wide input supply range  
allows operation from 3.5V to 30V (36V maximum).  
Pin defeatable Burst ModeTM operation provides high  
efficiency at low load currents while 99% duty cycle  
provides low dropout operation.  
Available in 16-LUead Narrow SSOP and SO Packages  
APPLICATIO S  
Notebook and Palmtop Computers, PDAs  
Power Supply for Mobile Pentium® III Processor with  
SpeedStepTM Technology  
Cellular Telephones and Wireless Modems  
, LTC and LT are registered trademarks of Linear Technology Corporation.  
Burst Mode and OPTI-LOOP are trademarks of Linear Technology Corporation.  
Pentium is a registered trademark of Intel Corporation. SpeedStep is a trademark of Intel  
Corporation.  
U
TYPICAL APPLICATIO  
PGOOD  
V
IN  
4.5V TO 24V  
C
C
: MARCON THCR70E1H226ZT  
: PANASONIC EEFUE06181R  
C
22µF  
50V  
CERAMIC  
×2  
IN  
OUT  
IN  
L1: PANASONIC ETQP6RZ1R20HFA  
C
47pF  
1
2
3
4
5
6
7
8
OSC  
16  
15  
14  
13  
12  
11  
10  
9
Q1  
FDS6680A  
C
TG  
R
: IRC CRF2010-01-R004J  
OSC  
SENSE  
C
0.22µF  
C
0.1µF  
B
SS  
RUN/SS  
BOOST  
L1  
R
33k  
R
C1  
SENSE  
0.004Ω  
C
330pF  
C2  
1.2µH  
V
OUT  
I
LTC1735-1 SW  
TH  
C
C1  
47pF  
1.35V TO 1.60V  
12A  
D1  
PGOOD  
V
IN  
CMDSH-3  
D2  
R1  
SENSE  
SENSE  
INTV  
CC  
MBRS340T3  
10k  
0.5%  
+
47pF  
47pF  
1000pF  
C
OUT  
+
Q2, Q3  
FDS6680A  
×2  
47pF  
BG  
4.7µF  
+
180µF  
R3  
33.2k  
1%  
4V  
V
PGND  
OSENSE  
PANASONIC SP  
5V  
(OPTIONAL)  
SGND  
EXTV  
CC  
×4  
Q4  
2N7002  
V
V
= 1: V  
= 0: V  
= 1.60V  
= 1.35V  
SEL  
SEL  
OUT  
OUT  
10Ω  
10Ω  
R2  
14.3k  
0.5%  
GND  
1735-1 F01  
Figure 1. CPU Core DC/DC Converter with Dynamic Voltage Selection from SpeedStep Enabled Processors  
1

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