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LTC4264
24
4264f
Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417
(408) 432-1900 ● FAX: (408) 434-0507 ● www.linear.com
LINEAR TECHNOLOGY CORPORATION 2007
LT 0307 PRINTED IN USA
RELATED PARTS
TYPICAL APPLICATION
PART NUMBER
DESCRIPTION
COMMENTS
LT1952
Single Switch Synchronous Forward Counter
Synchronous Controller, Programmable Volt-Sec Clamp, Low Start Current
LTC3803
Current Mode Flyback DC/DC Controller in ThinSOT
TM
200kHz Constant Frequency, Adjustable Slope Compensation, Optimized
for High Input Voltage Applications
LTC3805
Adjustable Frequency Current Mode Flyback Controller
Slope Comp Overcurrent Protect, Internal/External Clock
LTC3825
Isolate No-Opto Synchronous Flyback Controller with
Wide Input Supply Range
Adjustable Switching Frequency, Programmable Undervoltage Lockout,
Accurate Regulation without Trim, Synchronous for High Efciency
LTC4257-1
IEEE 802.3af PD Interface Controller
100V 400mA Internal Switch, Programmable Classication Dual
Current Limit
LTC4258
Quad IEEE 802.3af Power over Ethernet Controller
DC Disconnect Only, IEEE-Compliant PD Detection and Classication,
Autonomous Operation or I2C
TM Control
LTC4259A-1
Quad IEEE 802.3af Power over Ethernet Controller
AC or DC Disconnect IEEE-Compliant PD Detection and Classication,
Autonomous Operation or I2C Control
LTC4263
Single IEEE 802.3af Power over Ethernet Controller
AC or DC Disconnect IEEE-Compliant PD Detection and Classication,
Autonomous Operation or I2C Control
LTC4263-1
High Power Single PSE Controller
Internal Switch, Autonomous Operation, 30W
LTC4267
IEEE 802.3af PD Interface with an Integrated Switching
Regulator
100V 400mA Internal Switch, Programmable Classication, 200kHz
Constant Frequency PWM, Interface and Switcher Optimized for IEEE-
Compliant PD System
Burst Mode is a registered trademark of Linear Technology Corporation. No RSENSE and ThinSOT are trademarks of Linear Technology Corporation.
+
SHDN
NC
RCLASS
ILIM_EN
VIN
GND
NC
PWRGD
VOUT
1
2
3
4
5
6
12
11
10
9
8
7
LTC4264
NC
13
D15 B2100
PWRGD
VOUT
–
VOUT
+
OUT TO DC/DC
CONVERTER
R12
100k
RCLASS
22.1
1%
R21
100k
R7
75
R18
100k
D8
D9
B2100 4 PLCS
T3 ETH1-230LD
D7
TO
PHY
D6
D4
D5
D3
D2
1
2
3
4
5
6
14
PD IN
36V TO 57V
J1
SS-6488-NF-K1
13
12
11
10
9
R14
100k
C8
0.1
F
100V
C16
0.01
F
200V
C17
1000pF
2kV
R6
75
C15
0.01
F
200V
D1
SMAJ58A
Q5
FMMT23
C5
12
F
100V
D12 B2100
AC ADAPTER
24V
30W
+
–
R5
75
C14
0.01
F
200V
R4
75
IN
FROM
HIGH
POWER
PSE
C13
0.01
F
200V
1
2
3
6
4
5
7
8
LTC4264 with Auxiliary Supply