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LTC4263IDE-1#TRPBF

P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18P19-P20
LTC4263-1
1
42631fa
TYPICAL APPLICATION
FEATURES
APPLICATIONS
DESCRIPTION
High Power
Single PSE Controller
with Internal Switch
The LTC
®
4263-1 is a high power, single PSE controller for
use in Power over Ethernet systems. The internal current
limit and short-circuit protection are designed to provide
up to 30W of PSE output power for power hungry PoE
applications such as WAPs, security cameras and RFID
readers.
The LTC4263-1 includes IEEE 802.3af compliant PD detec-
tion circuitry along with selectable AC and DC disconnect
sensing, allowing seamless operation in conventional
IEEE 802.3af systems as well as propriety, high power
applications. The LTC4263-1 simplifi es PSE implementa-
tion, needing only a single supply and a small number of
passive support components. Onboard control algorithms
provide complete PSE functionality without the need of a
microcontroller and built-in foldback and thermal shutdown
provide comprehensive fault protection. An LED pin indi-
cates the state of the port and detection backoff timing is
confi gurable for either endpoint or midspan operation.
The LTC4263-1 is available in a miniature 14-pin 4mm ×
3mm DFN package.
n
30W PSE Output Power
n
IEEE 802
®
.3af Compatible
n
Operation from a Single 56V Supply
n
Fully Autonomous Operation Without a
Microcontroller
n
Internal MOSFET with Thermal Protection
n
Precision Inrush Control with Internal Sense Resistor
n
Forced Current PD Detection for Noise Immunity
n
AC and DC Disconnect Sensing
n
Legacy PD Detection
n
Robust Short-Circuit Protection
n
Pin-Selectable Detection Backoff for Midspan PSEs
n
LED Driver Indicates Port On and Blinks
Status Codes
n
Available in a Miniature14-Pin 4mm × 3mm DFN
Package
n
High Power Endpoint/Midspan PSEs
n
Single-Port or Multi-Port Power Injectors
n
Low Port Count PSEs
n
Environment B PSEs
n
Standalone PSEs
Single-Port Fully Autonomous High Power PSE
42631 TA01
0.1μF
100V
0.1μF
0.1μF
100V
SMAJ58A
LED
LEGACY
MIDSPAN
V
SS
V
SS
V
SS
OSC
LTC4263-1
ISOLATED
56V SUPPLY
+
–
TO PORT
MAGNETICS
V
DD5
V
SS
SD
V
DD48
OUT
OUT
ACOUT
1A
L, LT, LTC and LTM are registered trademarks of Linear Technology Corporation.
All other trademarks are the property of their respective owners.
LTC4263-1
2
42631fa
ELECTRICAL CHARACTERISTICS
ABSOLUTE MAXIMUM RATINGS
Supply Voltages
V
SS
– V
DD48
........................................... 0.3V to –80V
V
DD5
........................................V
SS
– 0.3V to V
SS
+ 6V
Pin Voltages and Currents
LEGACY, MIDSPAN, SD, OSC ..V
SS
– 0.3V to V
SS
+6V
LED .......................................V
SS
– 0.3V to V
SS
+ 80V
OUT, ACOUT ............................................ (See Note 3)
Operating Ambient Temperature Range
LTC4263CDE-1 ............................................ 0°C to 70°C
LTC4263IDE-1 ......................................... –40°C to 85°C
Junction Temperature (Note 4) ............................. 125°C
Storage Temperature Range ................... –65°C to 150°C
Lead Temperature (Soldering, 10 sec) .................. 300°C
(Note 1, Note 2)
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
Power Supplies
V
SUPPLY
Supply Voltage V
DD48
– V
SS
30W Output Power
l
33 48
56
66 V
V
V
UVLO_OFF
UVLO Turn-Off Voltage V
DD48
– V
SS
Decreasing
l
29 31 33 V
V
UVLO_HYS
UVLO Hysteresis
l
0.1 1 V
V
OVLO_OFF
OVLO Turn-Off Voltage V
DD48
– V
SS
Increasing
l
66 70 74 V
V
OVLO_HYS
OVLO Hysteresis
l
0.2 2 V
V
DD5
V
DD5
Supply Voltage Driven Externally
l
4.5 5 5.5 V
V
DD5
Internal Supply Driven Internally
l
4.3 4.4 4.5 V
I
DD48
V
DD48
Supply Current V
DD5
– V
SS
= 5V
Internal V
DD5
l
l
1
2
2
4
mA
mA
I
DD5
V
DD5
Supply Current V
DD5
– V
SS
= 5V
l
12 mA
The l denotes the specifi cations which apply over the full operating
temperature range, otherwise specifi cations are at T
A
= 25°C. V
DD48
– V
SS
= 48V and V
DD5
not driven externally. All voltages are
relative to V
SS
unless otherwise noted. (Note 2, Note 5)
PIN CONFIGURATION
1
2
3
4
5
6
7
14
13
12
11
10
9
8
15
V
DD5
V
SS
SD
V
DD48
OUT
OUT
ACOUT
LED
LEGACY
MIDSPAN
V
SS
V
SS
V
SS
OSC
TOP VIEW
DE14 PACKAGE
14-LEAD (4mm s 3mm) PLASTIC DFN
T
JMAX
= 125°C, θ
JA
= 43°C/W, θ
JC
= 4.3°C/W
EXPOSED PAD (PIN 15) IS V
SS
, MUST BE SOLDERED TO PCB
LEAD FREE FINISH TAPE AND REEL PART MARKING* PACKAGE DESCRIPTION TEMPERATURE RANGE
LTC4263CDE-1#PBF
LTC4263IDE-1#PBF
LTC4263CDE-1#TRPBF
LTC4263IDE-1#TRPBF
42631
42631
14-Lead (4mm × 3mm) Plastic DFN
14-Lead (4mm × 3mm) Plastic DFN
0°C to 70°C
–40°C to 85°C
Consult LTC Marketing for parts specifi ed with wider operating temperature ranges. *The temperature grade is identifi ed by a label on the shipping container.
Consult LTC Marketing for information on non-standard lead based fi nish parts.
For more information on lead free part marking, go to: http://www.linear.com/leadfree/
For more information on tape and reel specifi cations, go to: http://www.linear.com/tapeandreel/
ORDER INFORMATION
LTC4263-1
3
42631fa
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
Power MOSFET
R
ON
On-Resistance I = 350mA, Measured From OUT to V
SS
l
1.5 2.4
3.0
Ω
Ω
I
OUT_LEAK
OUT Pin Leakage V
OUT
– V
SS
= V
DD48
– V
SS
= 57V
l
110 μA
R
PU
OUT Pin Pull-Up Resistance to V
DD48
0V ≤ (V
DD48
– V
OUT
) ≤ 5V
l
360 500 640
kΩ
Current Control
I
CUT
Overload Current Threshold
l
540 570 600 mA
I
LIM
Short-Circuit Current Limit V
OUT
– V
SS
= 5V
V
DD48
– V
OUT
= 30V
l
l
615
615
645
645
675
675
mA
mA
I
FB
Foldback Current Limit V
DD48
– V
OUT
= 0V (Note 6)
V
DD48
– V
OUT
= 10V
l
l
45
165
90
220
180
275
mA
mA
I
MIN
DC Disconnect Current Threshold
l
5.2 7.5 9.8 mA
I
FAULT
High Speed Fault Current Limit (Note 7)
l
750 1000 1200 mA
Detection
I
DET
Detection Current First Point, V
DD48
– V
OUT
= 10V
Second Point, V
DD48
– V
OUT
= 3.5V
l
l
235
160
255
180
275
200
μA
μA
V
DET
Detection Voltage Compliance V
DD48
– V
OUT
, Open Port
V
DD48
– V
SS
= 57V
l
21 V
R
DETMIN
Minimum Valid Signature Resistance
l
15.5 17 18.5
kΩ
R
DETMAX
Maximum Valid Signature Resistance
l
27.5 29.7 32
kΩ
R
OPEN
Open-Circuit Threshold
l
500 2000
kΩ
AC Disconnect
R
OSC
OSC Pin Input Impedance 2V ≤ (V
OSC
– V
SS
) ≤ 3V
l
175 250 325
kΩ
I
OSC
OSC Pin Output Current V
OSC
– V
SS
= 2V
l
–140 140 μA
f
OSC
OSC Pin Frequency V
OSC
– V
SS
= 2V
l
103 110 115 Hz
A
VACD
Voltage Gain OSC to ACOUT 2V ≤ (V
OSC
– V
SS
) ≤ 3V
l
0.95 1.0 1.05 V/V
I
ACDMAX
AC Disconnect Output Current V
OSC
– V
SS
= 2V, 0V ≤ (V
ACOUT
– V
SS
) ≤ 4V
l
–1 1 mA
I
ACDMIN
Remain Connected AC Pin Current V
OSC
– V
SS
= 2V
l
130 160 190 μA
V
ACDEN
AC Disconnect Enable Signal V
OSC
– V
SS
, Port On
l
1.5 V
Digital Interface (Note 8)
V
OLED
LED Output Low Voltage I
LED
= 10mA
l
1.1 2.2 V
V
ILD
Digital Input Low Voltage MIDSPAN, SD
LEGACY
l
l
0.8
0.4
V
V
V
IHD
Digital Input High Voltage MIDSPAN, SD
LEGACY
l
l
2.2
2.2
V
V
V
OZ
Voltage of Legacy Pin if Left Floating
l
1.1 1.25 1.4 V
I
OLEG
Current In/Out of Legacy Pin 0V ≤ (V
LEGACY
– V
SS
) ≤ 5V
l
–60 60 μA
I
FLT
Maximum Allowed Leakage at Legacy
Pin When Floating
l
–10 10 μA
ELECTRICAL CHARACTERISTICS
The l denotes the specifi cations which apply over the full operating
temperature range, otherwise specifi cations are at T
A
= 25°C. V
DD48
– V
SS
= 48V and V
DD5
not driven externally. All voltages are
relative to V
SS
unless otherwise noted. (Note 2, Note 5)
P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18P19-P20

LTC4263IDE-1#TRPBF

Mfr. #:
Buy LTC4263IDE-1#TRPBF
Manufacturer:
Analog Devices Inc.
Description:
Power Switch ICs - POE / LAN IEEE 802.3af Single PSE Controller
Lifecycle:
New from this manufacturer.
Delivery:
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