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LT3845AIFE#PBF

更新时间： 2024-01-30 12:16:53
品牌 Logo 应用领域
凌特 - Linear 开关光电二极管
页数 文件大小 规格书
26页 277K
描述
LT3845A - High Voltage Synchronous Current Mode Step-Down Controller with Adjustable Operating Frequency; Package: TSSOP; Pins: 16; Temperature Range: -40°C to 85°C

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中文翻译

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LT3845AIFE#PBF 技术参数

是否Rohs认证： 符合生命周期：Transferred
零件包装代码：TSSOP包装说明：HTSSOP, TSSOP16,.25
针数：16Reach Compliance Code：compliant
ECCN代码：EAR99HTS代码：8542.39.00.01
风险等级：3.49其他特性：ALSO OPERATES IN ADJUSTABLE MODE UP TO 36V
模拟集成电路 - 其他类型：SWITCHING CONTROLLER控制模式：CURRENT-MODE
最大输入电压：60 V最小输入电压：4 V
标称输入电压：20 VJESD-30 代码：R-PDSO-G16
JESD-609代码：e3长度：5 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标称输出电压：8 V
封装主体材料：PLASTIC/EPOXY封装代码：HTSSOP
封装等效代码：TSSOP16,.25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）：NOT SPECIFIED
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：PUSH-PULL最大切换频率：500 kHz
技术：CMOS温度等级：AUTOMOTIVE
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：NOT SPECIFIED宽度：4.4 mm
Base Number Matches：1

LT3845AIFE#PBF 数据手册

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LT3845A  
High Voltage Synchronous  
Current Mode Step-Down  
Controller with Adjustable  
Operating Frequency  
FEATURES  
DESCRIPTION  
The LT®3845A is a high voltage, synchronous, current  
mode controller used for medium to high power, high  
efficiency supplies. It offers a wide 4V to 60V input range  
(7.5V minimum start-up voltage). An onboard regulator  
simplifies the biasing requirements by providing IC power  
n
High Voltage Operation: Up to 60V  
n
Synchronizable Up to 600kHz  
n
Adjustable Constant Frequency: 100kHz to 500kHz  
n
Output Voltages Up to 36V  
Stable Operation in Current Limit  
n
n
Adaptive Nonoverlap Circuitry Prevents Switch  
directly from V .  
IN  
Shoot-Through  
Burst Mode® operation maintains high efficiency at light  
loadsbyreducingICquiescentcurrentto120µA.Lightload  
efficiencyisalsoimprovedwiththereverseinductorcurrent  
inhibit function which supports discontinuous operation.  
n
Reverse Inductor Current Inhibit for Discontinuous  
Operation Improves Efficiency with Light Loads  
n
Programmable Soft-Start  
n
120µA No Load Quiescent Current  
n
Additional features include adjustable fixed operating  
frequency that can be synchronized to an external clock  
for noise sensitive applications, gate drivers capable of  
drivinglargeN-channelMOSFETs,aprecisionundervoltage  
lockout, 10µA shutdown current, short-circuit protection  
and a programmable soft-start.  
10µA Shutdown Supply Current  
n
1% Regulation Accuracy  
n
Standard Gate N-Channel Power MOSFETs  
n
Reverse Overcurrent Protection  
n
16-Lead Thermally Enhanced TSSOP Package  
APPLICATIONS  
The LT3845A is available in a 16-lead thermally enhanced  
TSSOP package.  
L, LT, LTC, LTM, Burst Mode, Linear Technology and the Linear logo are registered trademarks of  
Linear Technology Corporation. All other trademarks are the property of their respective owners..  
Protected by U.S. Patents, including 5481178, 6611131, 6304066, 6498466, 6580258.  
n
12V and 42V Automotive and Heavy Equipment  
n
48V Telecom Power Supplies  
n
Avionics and Industrial Control Systems  
Distributed Power Converters  
n
TYPICAL APPLICATION  
High Voltage Step-Down Regulator 48V to 12V at 75W  
Efficiency and Power Loss  
vs Load Current  
V
IN  
20V  
0.1µF  
TO 55V  
2.2µF  
100V  
100  
95  
90  
85  
80  
75  
70  
65  
7
6
5
4
3
2
1
0
V
= 48V  
1M  
IN  
V
BOOST  
TG  
IN  
47µF  
63V  
SHDN  
Si7370DP  
15µH  
1500pF  
LT3845A  
BAS521  
V
0.008Ω  
OUT  
C
SW  
SS  
12V  
82.5k  
20k  
75W  
V
CC  
BURST_EN  
B160  
33µF  
×3  
Si7370DP  
V
BG  
FB  
16.2k  
V
C
PGND  
100pF  
49.9k  
LOSS  
+
SYNC  
SENSE  
–
f
1µF  
SET  
SENSE  
2200pF  
SGND  
1N4148  
143k  
0.1  
10  
1
LOAD CURENT (A)  
3845A TA01b  
3845A TA01a  
3845afa  
1
1234567...26

中文翻译

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LT3845AIFE#PBF 替代型号

型号 品牌 替代类型 描述 数据表
LT3845AIFE#TRPBF Linear

完全替代

 LT3845A - High Voltage Synchronous Current Mode Step-Down Controller with Adjustable Opera
LT3845AEFE#TRPBF Linear

完全替代

 LT3845A - High Voltage Synchronous Current Mode Step-Down Controller with Adjustable Opera

与LT3845AIFE#PBF相关器件

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LT3845AIFE#TRPBF Linear

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LT3845AMPFE#PBF Linear

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LT3845EFE Linear

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LT3845EFE#PBF Linear

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LT3845EFE#TRPBF Linear

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 		LT3845 - High Voltage Synchronous Current Mode Step-Down Controller with Adjustable Operat
LT3845EFEPBF Linear

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 		High Voltage Synchronous Current Mode Step-Down Controller with Adjustable Operating Frequ
LT3845EFE-PBF Linear

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 		High Voltage Synchronous Current Mode Step-Down Controller with Adjustable Operating Frequ
LT3845EFETRPBF Linear

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 		High Voltage Synchronous Current Mode Step-Down Controller with Adjustable Operating Frequ
LT3845EFE-TRPBF Linear

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 		High Voltage Synchronous Current Mode Step-Down Controller with Adjustable Operating Frequ

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