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LT3844IFE#TRPBF

更新时间： 2024-02-12 04:20:27
品牌 Logo 应用领域
凌特 - Linear 开关控制器
页数 文件大小 规格书
24页 241K
描述
LT3844 - High Voltage, Current Mode Switching Regulator Controller with Programmable 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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LT3844IFE#TRPBF 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：5.13Is Samacsys：N
其他特性：ALSO HAS OUTPUT VOLTAGES UP TO 36V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：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）：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：500 kHz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：30宽度：4.4 mm
Base Number Matches：1

LT3844IFE#TRPBF 数据手册

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LT3844  
High Voltage, Current Mode  
Switching Regulator Controller with  
Programmable Operating Frequency  
U
FEATURES  
DESCRIPTIO  
The LT®3844 is a DC/DC controller used for medium  
power, low part count, high efficiency supplies. It offers  
a wide 4V-60V input range (7.5V minimum startup volt-  
age) and can implement step-down, step-up, inverting  
and SEPIC topologies.  
■
High Voltage Operation: Up to 60V  
Output Voltages up to 36V (Step-Down)  
Programmable Constant Frequency: 100kHz to  
■
■
500kHz  
■
Synchronizable up to 600kHz  
Burst Mode® Operation: 120μA Supply Current  
■
The LT3844 includes Burst Mode operation, which re-  
duces quiescent current below 120μA and maintains high  
efficiency at light loads. An internal high voltage bias  
regulator allows for simple biasing.  
■
10μA Shutdown Supply Current  
■
1.3% Reference Accuracy  
■
Drives N-Channel MOSFET  
Programmable Soft-Start  
Programmable Undervoltage Lockout  
Internal High Voltage Regulator for Gate Drive  
Thermal Shutdown  
Current Limit Unaffected by Duty Cycle  
16-Pin Thermally Enhanced TSSOP Package  
■
■
Additional features include current mode control for fast  
line and load transient response; programmable fixed  
operating frequency that can be synchronized to an exter-  
nal clock for noise sensitive applications; a gate driver  
capable of driving large N-channel MOSFETs; a precision  
undervoltage lockout function; 10μA shutdown current;  
short-circuit protection and a programmable soft-start  
function.  
■
■
■
■
U
APPLICATIO S  
■
Industrial Power Distribution  
12V and 42V Automotive and Heavy Equipment  
High Voltage Single Board Systems  
Distributed Power Systems  
Avionics  
Telecom Power  
■
The LT3844 is available in a 16-lead thermally enhanced  
TSSOP package.  
■
■
, LT, LTC and LTM are registered trademarks of Linear Technology Corporation.  
Burst Mode is a registered trademark of Linear Technology Corporation.  
All other trademarks are the property of their respective owners.  
■
■
Protected by U.S. Patents including 5731694, 6498466, 6611131.  
U
TYPICAL APPLICATIO  
High Voltage Step-Down Regulator 48V to 12V, 50W  
Efficiency and Power Loss  
vs Load Current  
V
IN  
90  
88  
86  
84  
82  
80  
78  
76  
7
6
5
4
3
2
1
0
36V  
TO  
0.22μF  
68μF  
22μF  
1 MEG  
60V  
V
BOOST  
TG  
IN  
SHDN  
Si7850DP  
EFFICIENCY  
1000pF  
10Ω  
82.5k  
C
SW  
SS  
BURST_EN  
V
CC  
10μH  
0.02Ω  
LOSS  
LT3844  
1μF  
V
OUT  
V
V
PGND  
12V  
FB  
C
PDS5100H  
50W  
10k  
680p  
+
SENSE  
68μF  
33μF  
130k  
14.7k  
120pF  
V
= 48V  
–
IN  
SYNC  
SENSE  
0.1  
10  
1
3844 TA01  
f
SGND  
LOAD CURRENT (A)  
SET  
3844 TA01b  
R7  
49.9k  
3844fa  
1
1234567...24

中文翻译

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LT3844IFE#TRPBF 替代型号

型号 品牌 替代类型 描述 数据表
LT3844IFE#PBF Linear

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