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LT1268BCT#PBF

更新时间： 2024-11-23 13:09:35
品牌 Logo 应用领域
凌特 - Linear 稳压器开关
页数 文件大小 规格书
4页 67K
描述
LT1268 - 7.5A, 150kHz Switching Regulators; Package: TO-220; Pins: 5; Temperature Range: 0°C to 70°C

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中文翻译

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LT1268BCT#PBF 技术参数

是否Rohs认证：符合生命周期：Transferred
零件包装代码：TO-220包装说明：,
针数：5Reach Compliance Code：not_compliant
ECCN代码：EAR99HTS代码：8542.39.00.01
风险等级：5.12Is Samacsys：N
模拟集成电路 - 其他类型：SWITCHING REGULATOR控制模式：CURRENT-MODE
最大输入电压：30 V最小输入电压：3 V
标称输入电压：15 VJESD-30 代码：R-PSFM-T5
JESD-609代码：e3湿度敏感等级：1
功能数量：1端子数量：5
最大输出电流：7.5 A标称输出电压：1.244 V
封装主体材料：PLASTIC/EPOXY封装形状：RECTANGULAR
封装形式：FLANGE MOUNT峰值回流温度（摄氏度）：NOT SPECIFIED
认证状态：Not Qualified最大供电电流 (Isup)：10 mA
表面贴装：NO切换器配置：BOOST
最大切换频率：150 kHz技术：BIPOLAR
端子面层：Matte Tin (Sn) - with Nickel (Ni) barrier端子形式：THROUGH-HOLE
端子位置：SINGLE处于峰值回流温度下的最长时间：NOT SPECIFIED
Base Number Matches：1

LT1268BCT#PBF 数据手册

 浏览型号LT1268BCT#PBF的Datasheet PDF文件第2页浏览型号LT1268BCT#PBF的Datasheet PDF文件第3页浏览型号LT1268BCT#PBF的Datasheet PDF文件第4页 
LT1268B/ LT1268  
7.5A, 150kHz  
Switc hing Re g ula to rs  
U
DESCRIPTIO  
EATURE  
S
F
■
■
■
■
■
■
Wide Input Voltage Range: 3.5V to 30V  
Low Quiescent Current: 7mA  
Internal 7.5A Switch  
Very Few External Parts Required  
Self-Protected Against Overloads  
Available in Standard and Surface Mount  
5-Pin Packages  
The LT1268B and LT1268 are monolithic high power  
switching regulators. Identical to the popular LT1070,  
except for switching frequency (150kHz) and higher  
switch current, they can be operated in all standard  
switching configurations including buck, boost, flyback,  
and inverting. A high current, high efficiency switch is  
included on the die along with all oscillator, control, and  
protection circuitry. Integration of all functions allows  
the LT1268 to be built in standard 5-pin power packages.  
This makes it extremely easy to use and provides “bust  
proof” operations similar to that obtained with 3-pin  
linear regulators.  
■
Can Be Externally Synchronized  
(See LT1072 Data Sheet)  
O U  
PPLICATI  
S
A
■
High Efficiency Boost Converter  
PC Power Supply with Multiple Outputs  
Battery Upconverter  
■
■
■
The LT1268 operate with supply voltages from 3.5V to  
30V and draw only 7mA quiescent current. By utilizing  
current mode switching techniques, it provides excellent  
AC and DC load and line regulation.  
Negative-to-Positive Converter  
USER NOTE:  
This data sheet is only intended to provide specifications, graphs, and a general functional  
description of the LT1268B/LT1268. Application circuits are included to show the capability of the  
LT1268B/LT1268.Acompletedesignmanual(AN19)shouldbeobtainedtoassistindevelopingnew  
designs. This manual contains a comprehensive discussion of both the LT1070 and the external  
components used with it, as well as complete formulas for calculating the values of these  
components. The manual can also be used for the LT1268B/LT1268 factoring in the higher switch  
current rating and higher operating frequency.  
TheLT1268useanadaptiveanti-satswitchdrivetoallow  
verywiderangingloadcurrents withnoloss inefficiency.  
An externally activated shutdown mode reduces total  
supply current to 100µA typical for standby operation.  
U
O
TYPICAL APPLICATI  
Boost Regulator with 5.3V ±1% Output  
Efficiency of 5.3V Boost Converter  
D1  
MBR1035  
100  
L1  
8µH, 5A*  
L2  
2µH, 5A**  
V
V
OUT  
IN  
4.7V TO  
5.3V  
5.3V ±1%  
3.75A  
V
= 5.3V  
IN  
D2, D3†  
1N4001  
90  
80  
70  
60  
C3  
390µF  
16V  
+
V
IN  
= 4.7V  
C5  
0.02  
R1  
4.043k  
0.1%  
V
IN  
= 5V  
V
V
SW  
IN  
LT1268B FB  
CASE GND  
C4  
+
C1  
220µF  
16V  
+
390µF  
16V  
V
C
R2  
1.24k  
0.1%  
C2  
0.068  
R3  
220Ω  
2
LOAD CURRENT (A)  
0
1
3
4
LT1268 • TA01  
*COILTRONICS CTX8-5-52  
**COILTRONICS CTX2-5-52  
†OPTIONAL. D2 AND D3 ARE USED TO INCREASE  
LT1268 • TA02  
UNDERVOLTAGE LOCKOUT FROM 2.7V TO ≈4V.  
1
1234

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