LTC4269CDKD-2#TRPBF Linear Technology, LTC4269CDKD-2#TRPBF Datasheet - Page 12

IC PD/SYNC FORWARD CTRLR 32-DFN

LTC4269CDKD-2#TRPBF

Manufacturer Part Number
LTC4269CDKD-2#TRPBF
Description
IC PD/SYNC FORWARD CTRLR 32-DFN
Manufacturer
Linear Technology
Type
Power Over Ethernet (PoE)r
Datasheet

Specifications of LTC4269CDKD-2#TRPBF

Applications
Power Interface Switch for Power Over Ethernet (PoE) Devices
Voltage - Supply
14 V ~ 16 V
Operating Temperature
0°C ~ 70°C
Mounting Type
Surface Mount
Package / Case
32-DFN
Current - Supply
1.35mA
Interface
IEEE 802.3af
Controller Type
Powered Device Interface Controller (PD)
Lead Free Status / RoHS Status
Lead free / RoHS Compliant

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LTC4269-2
block DiagraMs

EXPOSED PAD
SD_V
SYNC
R
OSC
SEC
15
11
12
33
V
V
IN
IN
OFF
ON
1.32V
V
23
+
+
IN
1.23V
10
FB
V
V
R
START-UP
INPUT CURRENT (ISTART)
PORTN
PORTN
SHDN
CLASS
T2P 2
I
10µA SD_V
0µA SD_V
HYST
1
3
5
6
+
(VOLTAGE)
ERROR AMPLIFIER
SEC
SEC
> 1.32V
= 1.32V
CONTROL
CIRCUITS
+
(TYPICAL 200kHz)
OSC
(100 TO 500)kHz
COMP
1.23V
9
REF
BOLD LINE INDICATES
HIGH CURRENT PATH
V
REF
14
2.5V
SOURCE
2.5mA
+
SS_MAXDC
RAMP
CLASSIFICATION
13
CURRENT LOAD
EN
GND
16
+
SLOPE COMP
35µA 80% DC
8µA 0% DC
(LINEAR)
DUTY CYCLE
MAXIMUM
ADAPTIVE
0.45V
0mV TO 220mV
CLAMP
25k
+
CURRENT
SENSE
S
R
Q
+
Q
16k
R
S
SOFT-START CONTROL
42692 BD1
DELAY
DELAY
ON
20
32
29
28
27
26
BLANK
BLANK
V
PWRGD
PWRGD
V
V
PORTP
NEG
NEG
17
DRIVER
1A
13V
107mV
CURRENT
OVER
>90%
V
REF
50mA
+
12V
42692 BD2
19 OC
18
24 SOUT
22
21
OUT
PGND
I
SENSE
42692fb

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