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LT3669-2_15

更新时间： 2024-09-18 01:16:59
品牌 Logo 应用领域
凌特 - Linear /
页数 文件大小 规格书
40页 539K
描述
IO-Link Transceiver with Integrated Step-Down Regulator and LDO

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LT3669-2_15 数据手册

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LT3669/LT3669-2  
IO-Link Transceiver with  
Integrated Step-Down  
Regulator and LDO  
FEATURES  
DESCRIPTION  
IO-Link® PHY Compatible (COM1/COM2/COM3)  
The LT®3669 is an industrial transceiver that includes a  
step-down switching regulator and a low dropout linear  
regulator. Wake-up detect functionality, as well as a pro-  
grammable power-on reset timer are also included. The  
currentlimitandslewrateofthetransmittersareexternally  
adjustable for optimum EMC performance.  
n
n
Cable Interface Protected to ±±60  
n
Operation from 7.50 to 460  
n
Integrated Step-Down Switching Regulator  
n
Max Load Current: 100mA (LT3669)/  
300mA (LT3669-2)  
n
Synchronizable and Adjustable Switching  
Frequency: 250kHz to 2.2MHz  
Output Voltage: 0.8V to 16V  
The line drivers can source/sink up to 250mA of current  
each or 500mA when connected together, with a minimal  
residual voltage of less than 2.1V. An internal adaptive  
pulsing scheme allows the drivers to safely switch heavy  
capacitive loads and incandescent bulbs. Thermal shut-  
down provides additional protection. Line protection of  
60V in the line interface pins allows the use of standard  
TVS diodes with L+ operating voltages up to 40V.  
n
n
Integrated 156mA LDO Linear Regulator  
n
Rugged Line Drivers with Adjustable Slew Rate and  
Current Limit  
n
Adaptive Line Driver Pulsing Scheme to Switch  
Heavy Loads Safely  
n
Drivers Configurable as Push-Pull, Pull-Up or  
The switching regulator integrates the catch diode in  
LT3669 (up to 100mA load current) and requires an exter-  
nal catch diode in LT3669-2 (up to 300mA load current).  
Pull-Down  
n
n
Adjustable Power-On Reset Timer  
Small 28-Pin Thermally Enhanced 4mm × 5mm  
QFN Package  
TheLT3669implementsanIO-LinkdevicePHY.ForIO-Link  
master designs, see the LTC2874.  
L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks and Hot Swap  
is a trademark of Linear Technology Corporation. IO-Link is a registered trademark of PROFIBUS  
User Organization (PNO). All other trademarks are the property of their respective owners.  
APPLICATIONS  
n
Industrial Sensors and Actuators  
TYPICAL APPLICATION  
Operating Waveforms  
5V  
53.6k  
10.2k  
LT3669  
100mA  
BD  
FB  
OUT  
82µH  
TXD1  
LDO  
SW  
0.1µF  
10µF  
IN  
5V/DIV  
0V  
CPOR  
RT  
RXD1  
5V/DIV  
0.1µF  
t = 12.5ms  
RST  
f = 600kHz  
SW  
BST  
38.3k  
42.2k  
0V  
SYNC  
SR  
ILIM  
LDO  
CQ1  
5V/DIV  
RESET  
I/O  
RST  
14k  
3.3V  
100mA  
FB  
SC1  
LDO  
4.42k  
I/O  
SC2  
AGND  
1µF  
0V  
I/O  
WAKE  
RXD1  
µC  
10µs/DIV  
I/O  
I/O  
I/O  
I/O  
I/O  
DIO  
V
, 7.5V TO 40V  
L+  
TXEN1 EN/UVLO  
(RXD1 PULL-UP RESISTOR = 10k)  
36692 TA01b  
TRANSIENT TO 60V  
TXD1  
TXEN2  
TXD2  
L+  
Q2  
250mA  
250mA  
1
4
CQ1  
2
GND  
470pF  
470pF  
4.7µF  
3
3669fa  
36692 TA01a  
1
For more information www.linear.com/LT3669  
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