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LT1767EMS8E-1.8#TR PDF预览

LT1767EMS8E-1.8#TR

更新时间: 2024-09-17 19:30:19
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
16页 239K
描述
LT1767 - Monolithic 1.5A, 1.25MHz Step-Down Switching Regulators; Package: MSOP; Pins: 8; Temperature Range: -40°C to 85°C

LT1767EMS8E-1.8#TR 技术参数

是否Rohs认证: 不符合生命周期:Transferred
零件包装代码:MSOP包装说明:PLASTIC, MSOP-8
针数:8Reach Compliance Code:not_compliant
ECCN代码:EAR99HTS代码:8542.39.00.01
风险等级:5.1模拟集成电路 - 其他类型:SWITCHING REGULATOR
控制模式:CURRENT-MODE最大输入电压:25 V
最小输入电压:3 V标称输入电压:15 V
JESD-30 代码:S-PDSO-G8JESD-609代码:e0
长度:3 mm湿度敏感等级:1
功能数量:1端子数量:8
最高工作温度:125 °C最低工作温度:
最大输出电流:3 A标称输出电压:1.8 V
封装主体材料:PLASTIC/EPOXY封装代码:HTSSOP
封装等效代码:TSSOP8,.19封装形状:SQUARE
封装形式:SMALL OUTLINE, HEAT SINK/SLUG, THIN PROFILE, SHRINK PITCH峰值回流温度(摄氏度):235
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:1500 kHz
技术:BIPOLAR温度等级:OTHER
端子面层:Tin/Lead (Sn/Pb)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:20宽度:3 mm
Base Number Matches:1

LT1767EMS8E-1.8#TR 数据手册

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LT1767/LT1767-1.8/  
LT1767-2.5/LT1767-3.3/LT1767-5  
Monolithic 1.5A, 1.25MHz  
Step-Down Switching Regulators  
U
DESCRIPTIO  
FEATURES  
The LT®1767 is a 1.25MHz monolithic buck switching  
regulator. Ahighefficiency1.5A, 0.22switchisincluded  
on the die together with all the control circuitry required to  
complete a high frequency, current mode switching regu-  
lator. Current mode control provides fast transient re-  
sponse and excellent loop stability.  
1.5A Switch in a Small MSOP Package  
Constant 1.25MHz Switching Frequency  
High Power Exposed Pad (MS8E) Package  
Wide Operating Voltage Range: 3V to 25V  
High Efficiency 0.22Switch  
1.2V Feedback Reference Voltage  
Fixed Output Voltages of 1.8V, 2.5V, 3.3V, 5V  
New design techniques achieve high efficiency at high  
switching frequencies over a wide operating range. A low  
dropout internal regulator maintains consistent perfor-  
manceoverawiderangeofinputsfrom24VsystemstoLi-  
Ion batteries. An operating supply current of 1mA im-  
proves efficiency, especially at lower output currents.  
Shutdown reduces quiescent current to 6µA. Maximum  
switch current remains constant at all duty cycles. Syn-  
chronization allows an external logic level signal to in-  
crease the internal oscillator from 1.4MHz to 2MHz.  
2% Overall Output Tolerance  
Uses Low Profile Surface Mount Components  
Low Shutdown Current: 6µA  
Synchronizable to 2MHz  
Current Mode Loop Control  
Constant Maximum Switch Current Rating at All Duty  
Cycles*  
U
APPLICATIO S  
DSL Modems  
TheLT1767isavailableinan8-pinMSOPfusedleadframe  
package and a low thermal resistance exposed pad pack-  
age. Full cycle-by-cycle short-circuit protection and ther-  
mal shutdown are provided. High frequency operation  
allows the reduction of input and output filtering compo-  
nents and permits the use of chip inductors.  
Portable Computers  
Wall Adapters  
Battery-Powered Systems  
Distributed Power  
, LTC and LT are registered trademarks of Linear Technology Corporation.  
*Patent Pending  
U
TYPICAL APPLICATIO  
Efficiency vs Load Current  
95  
12V to 3.3V Step-Down Converter  
D2  
V
V
= 10V  
OUT  
IN  
CMDSH-3  
= 5V  
90  
85  
80  
75  
70  
C2  
0.1µF  
L1  
5µH  
OUTPUT  
3.3V  
BOOST  
V
V
V
= 5V  
OUT  
IN  
IN  
V
IN  
V
SW  
FB  
C
12V  
= 3.3V  
C3  
1.2A*  
OPEN  
OR  
LT1767-3.3  
2.2µF  
CERAMIC  
SHDN  
SYNC GND  
HIGH  
= ON  
V
C
C1  
10µF  
CERAMIC  
D1  
C
1.5nF  
UPS120  
R
C
0
0.2 0.4 0.6 0.8  
1
1.2 1.4  
4.7k  
LOAD CURRENT (A)  
*MAXIMUM OUTPUT CURRENT IS SUBJECT TO THERMAL DERATING.  
1767 TA01  
1767 TA01a  
sn1767 1767fas  
1

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