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LT1777CS PDF预览

LT1777CS

更新时间: 2024-01-31 06:31:03
品牌 Logo 应用领域
凌特 - Linear 稳压器开关
页数 文件大小 规格书
24页 272K
描述
Low Noise Step-Down Switching Regulator

LT1777CS 技术参数

是否无铅:含铅是否Rohs认证:符合
生命周期:Active包装说明:SOP,
针数:16Reach Compliance Code:compliant
风险等级:5.15Is 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最小输入电压:7.4 V
标称输入电压:24 VJESD-30 代码:R-PDSO-G16
JESD-609代码:e3长度:9.9 mm
湿度敏感等级:1功能数量:1
端子数量:16最大输出电流:1 A
封装主体材料:PLASTIC/EPOXY封装代码:SOP
封装形状:RECTANGULAR封装形式:SMALL OUTLINE
峰值回流温度(摄氏度):250认证状态:Not Qualified
座面最大高度:1.75 mm表面贴装:YES
切换器配置:BUCK最大切换频率:115 kHz
端子面层:Matte Tin (Sn)端子形式:GULL WING
端子节距:1.27 mm端子位置:DUAL
处于峰值回流温度下的最长时间:NOT SPECIFIED宽度:3.9 mm
Base Number Matches:1

LT1777CS 数据手册

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LT1777  
Low Noise Step-Down  
Switching Regulator  
U
FEATURES  
DESCRIPTIO  
TheLT®1777isaBuck(step-down)regulatordesignedfor  
noise sensitive applications. It contains a dI/dt limiting  
circuit programmed via a small external inductor in the  
switchingpath.Internalcircuitryalsogeneratescontrolled  
dV/dt ramp rates.  
Programmable dI/dt Limit  
Internally Limited dV/dt  
High Input Voltage: 48V Max  
700mA Peak Switch Rating  
True Current Mode Control  
100kHz Fixed Operating Frequency  
The monolithic die includes all oscillator, control and  
protection circuitry. The part can accept operating input  
voltages as high as 48V, and contains an output switch  
rated at 700mA peak current. Current mode control offers  
excellent dynamic input supply rejection and short-circuit  
protection. The internal control circuitry is normally pow-  
ered via the VCC pin, thereby minimizing power drawn  
directly from the VIN supply (see Applications Informa-  
tion). The fused-lead SO16 package and 100kHz switch-  
ing frequency allow for minimal PC board area  
Synchronizable to 250kHz  
Low Supply Current in Shutdown: 30µA  
Low Thermal Resistance 16-Pin SO Package  
U
APPLICATIO S  
Automotive Cellular and GPS Receivers  
Telecom Power Supplies  
Industrial Instrument Power Supplies  
requirements.  
, LTC and LT are registered trademarks of Linear Technology Corporation.  
U
TYPICAL APPLICATIO  
Low Noise 5V Step-Down Supply  
VSW Switching Waveforms  
V
IN  
24V  
10  
+
39µF  
63V  
V
IN  
3
4
SHDN  
LT1777  
SYNC  
V
CC  
100pF  
VSW  
VOLTAGE  
10V/DIV  
1µH*  
220µH  
V
OUT  
12  
14  
6
V
5V  
SW  
5
400mA  
+
V
V
D
C
100µF  
10V  
36.5k  
1%  
13  
MBRS1100  
FB  
100pF 12k  
2200pF  
SGND  
VSW  
CURRENT  
200mA/DIV  
7
12.1k  
1%  
1777 TA01  
*PROGRAMS dI/dT  
1777 TA02  
500ns/DIV  
1

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