ltc4270 Linear Technology Corporation, ltc4270 Datasheet - Page 32

• Manufacturer Part Number: ltc4270
• Description: 12-port Poe/poe+/ltpoe++ Pse Controller
• Manufacturer: Linear Technology Corporation

LTC4270/LTC4271
TYPICAL APPLICATION
RELATED PARTS
PART NUMBER DESCRIPTION
LTC4257-1
LTC4263
LTC4263-1
LTC4265
LTC4266
LTC4267
LTC4267-1
LTC4267-3
LTC4269-1
LTC4269-2
LTC4272
LTC4278
LTC4274
LTC4311
32
Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417
[phone]
IEEE 802.3af PD Interface Controller
Single IEEE 802.3af PSE Controller
High Power Single PoE PSE Controller
IEEE 802.3at PD Interface Controller
Quad IEEE 802.3at PoE PSE Controller
IEEE 802.3af PD Interface With Integrated
Switching Regulator
IEEE 802.3af PD Interface With Integrated
Switching Regulator
IEEE 802.3af PD Interface With Integrated
Switching Regulator
IEEE 802.3af PD Interface With Integrated
Flyback Switching Regulator
IEEE 802.3af PD Interface With Integrated
Forward Switching Regulator
Single-chip 12-port IEEE 802.3at PoE PSE
Controller
IEEE 802.3af PD Interface With Integrated
Flyback Switching Regulator
Single IEEE 802.3at PoE PSE Controller
SMBus/ I
GP0
GP1
MID
RESET
MSD
AUTO
INT
SCL
SDAIN
SDAOUT
AD0
AD1
AD2
AD3
AD6
DGND
LTC4271
V
3.3V
DD33
CAP1
2
●
C Accelerator
FAX: [phone]
0.1μF
1μF
DND
CPD
CND
DPD
3.3V
3.3V
100Ω
100Ω
100Ω
100Ω
2nF 2000V
1μF
1μF
T2
T3
D
TSS
●
www.linear.com
–54V
–54V
1μF
100V
X7R
BULK CAP
CPA
CNA
DPA
DNA
AGND
SYSTEM
XIO0
>47μF
CAP2
LTC4270
ISOLATED
COMMENTS
Internal 100V, 400mA Switch, Dual Current Limit, Programmable Class
Internal FET Switch
With Internal FET Switch
Internal 100V, 1A Switch, 2-Event Classification Recognition
With Programmable CUT/LIM, 2-Event Classification, and Port Current and Voltage Monitoring
Internal 100V, 400mA Switch, Dual Inrush Current, Programmable Class
Internal 100V, 400mA Switch, Programmable Class, 200kHz Constant Frequency PWM
Internal 100V, 400mA Switch, Programmable Class, 300kHz Constant Frequency PWM
2-Event Classification, Programmable Class, Synchronous No-Opto Flyback Controller,
50kHz to 250kHz, Aux Support
2-Event Classification, Programmable Class, Synchronous Forward Controller, 100kHz to
500kHz, Aux Support
With Programmable CUT/LIM, 2-Event Class, and Port Current and Voltage Monitoring
2-Event Classification, Programmable Class, Synchronous No-Opto Flyback Controller,
50kHz to 250kHz, 12V Aux Support
With Programmable CUT/LIM, 2-Event Classification, and Port Current and Voltage Monitoring
Improved I
–54V
–54V
+
V
EE
SENSE12
XIO1
ISOLATED
SENSE1
GATE12
VSSK
OUT12
GATE1
GND
OUT1
2
C Rise Time, Ensures Data Integrity
(NETWORK
PHYSICAL
LAYER
CHIP)
PHY
0.25Ω, 1%
RS
S1B
T1
S1B
FDMC3612
0.22μF
100V
X7R
0.01μF
0.01μF
200V
200V
75Ω
75Ω
© LINEAR TECHNOLOGY CORPORATION 2011
75Ω
75Ω
0.01μF
0.01μF
200V
200V
CONNECTOR
0.01μF
0.01μF
42701 F16
200V
200V
RJ45
CONNECTOR
1
2
3
4
5
6
7
8
LT 0411 • PRINTED IN USA
1
2
RJ45
1
2
3
4
5
6
7
8
11
12
42701f