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LTC1736

更新时间： 2024-02-16 04:12:07
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 325K
描述
5-Bit Adjustable High Efficiency Synchronous Step-Down Switching Regulator

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中文翻译

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LTC1736 技术参数

是否无铅：含铅是否Rohs认证：符合
生命周期：Active包装说明：SSOP,
针数：24Reach Compliance Code：compliant
风险等级：5.15Is Samacsys：N
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：5.5 V
最小输入电压：2.7 V标称输入电压：5 V
JESD-30 代码：R-PDSO-G24JESD-609代码：e3
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：-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
表面贴装：YES切换器配置：PUSH-PULL
最大切换频率：500 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 mmBase Number Matches：1

LTC1736 数据手册

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LTC1736  
5-Bit Adjustable  
High Efficiency Synchronous  
Step-Down Switching Regulator  
U
FEATURES  
DESCRIPTIO  
The LTC®1736 is a synchronous step-down switching  
■
Dual N-Channel MOSFET Synchronous Drive  
■
Synchronizable/Programmable Fixed Frequency  
Wide VIN Range: 3.5V to 36V Operation  
regulator controller optimized for CPU power. The output  
voltage is programmed by a 5-bit digital-to-analog con-  
verter (DAC) that adjusts the output voltage from 0.925V  
to 2.00V according to Intel mobile VID specifications. The  
0.8V reference is compatible with future microprocessor  
generations.  
■
■
5-Bit Digital-to-Analog VOUT Selection:  
0.925V to 2.00V Range with 50mV/25mV Steps  
OPTI-LOOPTM Compensation Minimizes COUT  
■
■
■
■
■
■
■
±
1% Output Voltage Accuracy  
Power Good Output Voltage Monitor  
Active Voltage Positioning Compatible  
Output Overvoltage Crowbar Protection  
Internal Current Foldback  
The operating frequency (synchronizable up to 500kHz) is  
set by an external capacitor allowing maximum flexibility  
inoptimizingefficiency.Theoutputvoltageismonitoredby  
a power good window comparator that indicates when the  
output is within 7.5% of its programmed value.  
Latched Short-Circuit Shutdown Timer  
with Defeat Option  
Forced Continuous Control Pin  
Optional Programmable Soft-Start  
Remote Output Voltage Sense  
■
■
■
■
Protection features include: internal foldback current lim-  
iting, output overvoltage crowbar and optional short-cir-  
cuitshutdown.Soft-startisprovidedbyanexternalcapaci-  
tor that can be used to properly sequence supplies. The  
operatingcurrentlevelisuser-programmableviaanexter-  
nal current sense resistor. Wide input supply range allows  
operation from 3.5V to 30V (36V maximum).  
Pin defeatable Burst ModeTM operation provides high effi-  
ciency at low load currents. OPTI-LOOP compensation  
allows the transient response to be optimized over a wide  
range of output capacitance and ESR values.  
Available in 24-LUead SSOP Package  
APPLICATIO S  
■
Notebook and Palmtop Computers, PDAs  
Power Supply for Mobile Pentium® II and  
■
Pentium III Processors  
Low Voltage Power Supplies  
■
, LTC and LT are registered trademarks of Linear Technology Corporation.  
OPTI-LOOP and Burst Mode are trademarks of Linear Technology Corporation.  
Pentium is a registered trademark of Intel Corporation.  
U
TYPICAL APPLICATIO  
V
C
IN  
OSC  
5V TO 24V  
47pF  
C
V
IN  
OSC  
C
IN  
C
SS  
0.1µF  
22µF/50V  
×2  
M1  
TG  
L1  
1.2µH  
FDS6680A  
R
CERAMIC  
SENSE  
0.004Ω  
RUN/SS  
V
OUT  
C
C1  
330pF  
SW  
1.35V TO 1.60V  
12A  
R
C
33k  
D
B
LTC1736  
VIDV  
CMDSH-3  
CC  
CC  
C
B
0.22µF  
I
TH  
+
C
OUT  
C
C2  
47pF  
INTV  
180µF/4V  
×4  
PGOOD  
VID4  
BOOST  
+
VID3  
4.7µF  
VID2  
M2  
FDS6680A  
×2  
D1  
BG  
VID1  
MBRS340T3  
C
: PANASONIC EEFUEOG181R  
OUT  
VID0  
C
: MARCON THCR70EIH226ZT  
IN  
SGND  
PGND  
+
L1: PANASONIC ETQP6RZIR20HFA  
: IRC LRF2010-01-R004J  
–
V
SENSE SENSE  
1000pF  
OSENSE  
R
SENSE  
47pF  
1736 F01  
Figure 1. High Efficiency Step-Down Converter  
1
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中文翻译

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