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LT3990

更新时间： 2024-02-24 00:57:43
品牌 Logo 应用领域
Linear Systems 转换器
页数 文件大小 规格书
26页 260K
描述
High Efficiency, 65V 500mA Synchronous Step-Down Converter

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中文翻译

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LT3990 技术参数

是否Rohs认证：符合生命周期：Transferred
零件包装代码：MSOP包装说明：HTSSOP, TSSOP16,.19,20
针数：16Reach Compliance Code：compliant
ECCN代码：EAR99HTS代码：8542.39.00.01
风险等级：5.13Is Samacsys：N
模拟集成电路 - 其他类型：SWITCHING REGULATOR控制模式：CURRENT-MODE
控制技术：PULSE WIDTH MODULATION最大输入电压：62 V
最小输入电压：4.2 V标称输入电压：12 V
JESD-30 代码：R-PDSO-G16JESD-609代码：e3
长度：4.039 mm湿度敏感等级：1
功能数量：1端子数量：16
最高工作温度：125 °C最低工作温度：-40 °C
最大输出电流：0.865 A标称输出电压：3.3 V
封装主体材料：PLASTIC/EPOXY封装代码：HTSSOP
封装等效代码：TSSOP16,.19,20封装形状：RECTANGULAR
封装形式：SMALL OUTLINE, HEAT SINK/SLUG, THIN PROFILE, SHRINK PITCH峰值回流温度（摄氏度）：260
认证状态：Not Qualified座面最大高度：1.1 mm
子类别：Switching Regulator or Controllers表面贴装：YES
切换器配置：BUCK最大切换频率：2760 kHz
技术：BIPOLAR温度等级：AUTOMOTIVE
端子面层：Matte Tin (Sn)端子形式：GULL WING
端子节距：0.5 mm端子位置：DUAL
处于峰值回流温度下的最长时间：30宽度：3 mm
Base Number Matches：1

LT3990 数据手册

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LTC3630  
High Efficiency, 65V  
500mA Synchronous  
Step-Down Converter  
FEATURES  
DESCRIPTION  
The LTC®3630 is a high efficiency step-down DC/DC  
converter with internal high side and synchronous power  
switches that draws only 12μA typical DC supply current  
while maintaining a regulated output voltage at no load.  
n
Wide Operating Input Voltage Range: 4V to 65V  
n
Synchronous Operation for Highest Efficiency  
n
Internal High Side and Low Side Power MOSFETs  
n
No Compensation Required  
n
Adjustable 50mA to 500mA Maximum Output Current  
The LTC3630 can supply up to 500mA load current and  
features a programmable peak current limit that provides  
a simple method for optimizing efficiency and for reduc-  
ing output ripple and component size. The LTC3630’s  
combination of Burst Mode® operation, integrated power  
switches, low quiescent current, and programmable peak  
current limit provides high efficiency over a broad range  
of load currents.  
n
Low Dropout Operation: 100% Duty Cycle  
Low Quiescent Current: 12ꢀA  
Wide Output Range: 0.8V to V  
n
n
IN  
n
n
n
n
n
n
0.8V 1% Feedback Voltage Reference  
Precise RUN Pin Threshold  
Internal and External Soft-Start  
Programmable 1.8V, 3.3V, 5V or Adjustable Output  
Few External Components Required  
Low Profile (0.75mm) 3mm × 5mm DFN and  
Thermally-Enhanced MSE16 Packages  
With its wide input range of 4V to 65V, the LTC3630 is a  
robust converter suited for regulating a wide variety of  
powersources.Additionally,theLTC3630includesaprecise  
run threshold and soft-start feature to guarantee that the  
power system start-up is well-controlled in any environ-  
ment. A feedback comparator output enables multiple  
LTC3630s to be paralleled in higher current applications.  
APPLICATIONS  
n
Industrial Control Supplies  
n
Medical Devices  
n
Distributed Power Systems  
n
Portable Instruments  
The LTC3630 is available in the thermally-enhanced  
3mm × 5mm DFN and the MSE16 packages.  
L, LT, LTC, LTM, Burst Mode, Linear Technology and the Linear logo are registered trademarks  
and ThinSOT is a trademark of Linear Technology Corporation. All other trademarks are the  
property of their respective owners.  
n
Battery-Operated Devices  
n
Automotive  
Avionics  
n
TYPICAL APPLICATION  
Efficiency vs Load Current  
100  
V
= 3.3V  
OUT  
V
= 12V  
IN  
4V to 65V Input to 3.3V Output, 500mA Step-Down Converter  
90  
80  
70  
60  
50  
40  
30  
47ꢀH  
V
OUT  
V
IN  
3.3V  
V
SW  
LTC3630  
RUN  
IN  
4V TO 65V  
100ꢀF  
w2  
500mA  
2.2ꢀF  
V
= 65V  
IN  
V
FB  
SS  
V
PRG1  
V
PRG2  
FBO  
I
SET  
GND  
3630 TA01a  
I
I
= 220kΩ||220pF  
= OPEN  
SET  
SET  
0.1  
1
10  
100  
1000  
LOAD CURRENT (mA)  
3630 TA01b  
3630fb  
1
1234567...26

中文翻译

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