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LTC4267IGN-3#TRPBF PDF预览

LTC4267IGN-3#TRPBF

更新时间： 2024-09-15 15:38:11
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
34页 363K
描述
LTC4267-3 - Power over Ethernet IEEE 802.3af PD Interface with Integrated 300kHz Switching Regulator; Package: SSOP; Pins: 16; Temperature Range: -40°C to 85°C

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LTC4267IGN-3#TRPBF 技术参数

是否Rohs认证： 符合生命周期：Transferred
零件包装代码：SSOP包装说明：SSOP, SSOP16,.25
针数：16Reach Compliance Code：compliant
ECCN代码：EAR99HTS代码：8542.39.00.01
风险等级：5.16模拟集成电路 - 其他类型：SWITCHING CONTROLLER
控制模式：CURRENT-MODEJESD-30 代码：R-PDSO-G16
JESD-609代码：e3长度：4.8895 mm
湿度敏感等级：1功能数量：1
端子数量：16最高工作温度：85 °C
最低工作温度：-40 °C最大输出电流：1 A
封装主体材料：PLASTIC/EPOXY封装代码：SSOP
封装等效代码：SSOP16,.25封装形状：RECTANGULAR
封装形式：SMALL OUTLINE, SHRINK PITCH峰值回流温度（摄氏度）：260
认证状态：Not Qualified座面最大高度：1.75 mm
子类别：Switching Regulator or Controllers表面贴装：YES
切换器配置：SINGLE最大切换频率：330 kHz
技术：CMOS温度等级：INDUSTRIAL
端子面层：Matte Tin (Sn)端子形式：GULL WING
端子节距：0.635 mm端子位置：DUAL
处于峰值回流温度下的最长时间：30宽度：3.899 mm
Base Number Matches：1

LTC4267IGN-3#TRPBF 数据手册

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LTC4267-3  
Power over Ethernet  
IEEE 802.3af PD Interface with  
Integrated Switching Regulator  
FEATURES  
n
DESCRIPTION  
Complete Power Interface Port for IEEE 802®.3af  
Powered Device (PD)  
The LTC®4267-3 combines an IEEE 802.3af compliant  
PoweredDevice(PD)interfacewitha300kHzcurrentmode  
switching regulator, providing a complete power solution  
for PD applications. The LTC4267-3 integrates the 25k  
signature resistor, classification current source, thermal  
overload protection, signature disable and power good  
signal along with an undervoltage lockout optimized for  
use with the IEEE-required diode bridge. The LTC4267-3  
providesanincreasedoperationalcurrentlimit,maximizing  
power available for class 3 applications.  
n
n
n
n
n
n
n
n
n
n
Onboard 100V, UVLO Switch  
Constant-Frequency 300kHz Operation  
Precision Dual Level Inrush Current Limit  
Integrated Current Mode Switching Regulator  
Onboard 25k Signature Resistor with Disable  
Programmable Classification Current (Class 0-4)  
Thermal Overload Protection  
Power Good Signal  
Integrated Error Amplifier and Voltage Reference  
Low Profile 16-Pin SSOP or DFN Packages  
The 300kHz current mode switching regulator provides  
higher output power or smaller external size compared  
to its lower frequency counterparts. The LTC4267-3 is  
designed for driving a 6V rated N-channel MOSFET and  
features programmable slope compensation, soft-start,  
and constant-frequency operation, minimizing noise even  
with light loads. The LTC4267-3 includes an onboard er-  
ror amplifier and voltage reference allowing use in both  
isolated and nonisolated configurations.  
APPLICATIONS  
n
IP Phone Power Management  
n
Wireless Access Points  
n
Security Cameras  
Power over Ethernet  
n
L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks and  
++  
LTPoE is a trademark of Linear Technology Corporation. All other trademarks are the property  
The LTC4267-3 is available in a space saving, low profile  
16-pin SSOP or DFN packages.  
of their respective owners.  
TYPICAL APPLICATION  
Class 2 PD with 3.3V Isolated Power Supply  
PA1133 SBM1040  
3.3V  
1.5A  
10k  
+
–48V  
•
HD01  
FROM  
V
P
PORTP  
VCC  
+
320µF  
MIN  
P
CHASSIS  
DATA PAIR  
5µF  
MIN  
VCC  
+
–
•
4.7µF  
PWRGD  
LTC4267-3  
SMAJ58A  
NGATE  
SENSE  
/RUN  
Si3440  
10k  
0.1µF  
0.1Ω  
P
VCC  
R
I
TH  
CLASS  
470Ω  
+
HD01  
R
–48V  
FROM  
SPARE PAIR  
CLASS  
68.1Ω  
6.8k  
V
FB  
1%  
100k  
–
22nF  
SIGDISA  
PGND  
BAS516  
V
P
OUT  
PORTN  
PS2911  
60.4k  
TLV431  
42671 TA01  
42673fa  
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