LTC4263CDE-1#PBF Linear Technology, LTC4263CDE-1#PBF Datasheet - Page 5

• Manufacturer Part Number: LTC4263CDE-1#PBF
• Description: IC IEEE 803.2AF CNTRLR 14-DFN
• Manufacturer: Linear Technology
• Type: Power Over Ethernet (PoE)r

Specifications of LTC4263CDE-1#PBF

• Applications: Power Interface Switch for Power Over Ethernet (PoE) Devices
• Voltage - Supply: 48V
• Operating Temperature: 0°C ~ 70°C
• Mounting Type: Surface Mount
• Package / Case: 14-DFN
• Current - Supply: 1mA
• Interface: IEEE 802.3af
• Controller Type: Power Sourcing Equipment Controller (PSE)
• Operating Temperature (max): 70C
• Operating Temperature (min): 0C
• Pin Count: 14
• Mounting: Surface Mount
• Package Type: DFN EP
• Case Length: 4mm
• Screening Level: Commercial
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

TYPICAL PERFORMANCE CHARACTERISTICS
10V/DIV
2V/DIV
V
V
V
V
DD48
DD48
V
OUT
OUT
SS
Powering an IEEE 802.3af PD
Midspan Backoff with Invalid PD
R
DETECTION
PHASE 1
PORT
= 15.5k
20A/DIV 0A
DETECTION
PHASE 2
I
PORT
20V/DIV
100ms/DIV
500ms/DIV
V
V
DD48
t
V
20A
OUT
DBO
SS
Rapid Response to 1Ω Short
1Ω SHORT
APPLIED
POWER
ON
42631 G01
42631 G11
1μs/DIV
I
1Ω RESISTOR APPLIED
TO OUTPUT OF CIRCUIT
ON FRONT PAGE
PORT
300mA/DIV
300mA/DIV
= CURRENT IN
20V/DIV
20V/DIV
600mA
600mA
V
V
V
V
DD48
DD48
I
0mA
0mA
I
V
V
OUT
OUT
OUT
OUT
SS
SS
Powering a Legacy PD with
470μF Bypass Capacitor
Overcurrent Response Time
42631 G14
570mA CURRENT LIMIT
LOAD
APPLIED
25ms/DIV
10ms/DIV
PORT OFF
FOLDBACK
t
OVLD
300mA/DIV
20V/DIV
600mA
V
I
V
PORT
DD48
0mA
V
42631 G12
OUT
42631 G02
SS
LOAD
FULLY
CHARGED
Rapid Response to
Momentary 33Ω Short
I
TO OUTPUT OF CIRCUIT ON FRONT PAGE
PORT
33Ω SHORT APPLIED
= CURRENT IN 33Ω RESISTOR APPLIED
FOLDBACK CURRENT LIMIT
CURRENT
LIMIT ACTIVE
10V/DIV
10V/DIV
1A/DIV
V
V
I
V
V
DD48
PORT
DD48
V
OUT
V
OUT
100μs/DIV
SS
SS
Overload Restart Delay
Response to PD Removal with
AC Disconnect Enabled
PD REMOVAL
SHORT
REMOVED
LTC4263-1
42631 G15
500ms/DIV
t
50ms/DIV
MPDO
t
ED
PORT OFF
42631fa
42631 G13
42631 G10
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