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

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

Specifications of LTC4263CDE#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
10V/DIV
10V/DIV
500mA/
V
V
V
I
V
V
V
DD48
DD48
PORT
DD48
V
OUT
V
OUT
DIV
OUT
V
SS
SS
SS
Powering an IEEE 802.3af PD
Overload Restart Delay
Response to PD Removal with
AC Disconnect Enabled
DETECTION
PHASE 1
PD REMOVAL
DETECTION
PHASE 2
CLASSIFICATION
100ms/DIV
500ms/DIV
t
50ms/DIV
MPDO
t
ED
PORT OFF
POWER
ON
4263 G13
4263 G10
4263 G01
200mA/DIV
I
PORT
20A/
DIV
20V/DIV
20V/DIV
400mA
2V/DIV
V
V
V
V
V
V
DD48
DD48
DD48
I
0mA
V
V
20A
OUT
OUT
OUT
OUT
0A
SS
SS
Midspan Backoff with Invalid PD
Rapid Response to 1Ω Short
Powering a Legacy PD with
220μF Bypass Capacitor
CLASSIFICATION
R
PORT
1Ω SHORT
APPLIED
= 15.5kΩ
425mA CURRENT LIMIT
500ms/DIV
25ms/DIV
1μs/DIV
FOLDBACK
t
I
1Ω RESISTOR APPLIED
TO OUTPUT OF CIRCUIT
ON FRONT PAGE
DBO
PORT
= CURRENT IN
LOAD
FULLY
CHARGED
4263 G14
4263 G02
4263 G11
V
V
200mA/DIV
400mA/DIV
DD48
DD48
20mA/DIV
20V/DIV
20V/DIV
400mA
800mA
2V/DIV
V
V
– 18V
– 19V
40mA
I
V
V
V
DD48
DD48
PORT
0mA
0mA
0mA
I
I
OUT
OUT
OUT
V
OUT
OUT
V
SS
SS
I
TO OUTPUT OF CIRCUIT ON FRONT PAGE
Classifi cation Transient
Response to 40mA Load Step
Overcurrent Response Time
Rapid Response to
Momentary 50Ω Short
PORT
50Ω SHORT APPLIED
V
T
A
DD48
= 25°C
= CURRENT IN 50Ω RESISTOR APPLIED
– V
FOLDBACK CURRENT LIMIT
SS
CURRENT
LIMIT ACTIVE
= 48V
LOAD
APPLIED
100μs/DIV
100μs/DIV
10ms/DIV
LTC4263
PORT OFF
t
OVLD
SHORT
REMOVED
4263fe
5
4263 G15
4263 G06
4263 G12