LTC4269CDKD-2#PBF Linear Technology, LTC4269CDKD-2#PBF Datasheet - Page 3

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

Specifications of LTC4269CDKD-2#PBF

• 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

elecTrical characTerisTics
temperature range, otherwise specifications are at T
PARAMETER
Interface Controller (Note 5)
Operating Input Voltage
ON/UVLO Hysteresis Window
Signature/Class Hysteresis Window
Reset Threshold
Supply Current
Supply Current at 57V
Class O Current
Signature
Signature Resistance
Invalid Signature Resistance, SHDN Invoked
Invalid Signature Resistance During Mark Event
Classification
Class Accuracy
Classification Stability Time
Normal Operation
Inrush Current
Power FET On-Resistance
Power FET Leakage Current at V
Digital Interface
SHDN Input High Level Voltage
SHDN Input Low Level Voltage
SHDN Input Resistance
PWRGD, T2P Output Low Voltage
PWRGD, T2P Leakage Current
PWRGDP Output Low Voltage
PWRGDP Clamp Voltage
PWRGDP Leakage Current
PWM Controller (Note 11)
Operational Input Voltage
V
V
V
SD_V
IN
IN
IN
Signature Range
Classification Range
On Voltage
Undervoltage Lockout
Overvoltage Lockout
Quiescent Current
Start-Up Current
Shutdown Current
SEC
Threshold
NEG
CONDITIONS
At V
State Machine Reset for 2-Event Classification
Measured at V
V
1.5V ≤ V
1.5V ≤ V
(Notes 7, 8)
10mA < I
(Notes 9, 10)
V
I
V
Tested at 600mA into V
V
V
Tested at 1mA, V
Complete 2-Event Classification to See Active Low
Pin Voltage Pulled 57V, V
Tested at 0.5mA, V
Voltage is with Respect to V
Tested at 2mA, V
to V
V
to V
I
I
FB = 0V, SS_MAXDC = 0V (Notes 12, 13)
SD_V
10V < SD < 25V
CLASS
VREF
VREF
PORTP
PORTP
PORTP
PORTP
PORTP
PWRGD
NEG
NEG
PORTP
A
= 0µA
= 0µA, I
SEC
within 3.5% of Ideal Value (Notes 9, 10)
= 25°C.
= 17.5V, No R
Pin Step to 17.5V, R
= 54V, V
= SHDN = V
= 9.8V, SHDN = 9.65V
= 11V, V
PORTP
PORTP
CLASS
= 0V (Notes 12, 13)
(Note 6)
The
SENSE
PORTP
≤ 9.8V (Note 7)
≤ 9.8V, V
< 40mA, 12.5V < V
NEG
NEG
PORTP
NEG
l
PORTP
NEG
= OC = Open
= 3V
denotes the specifications which apply over the full operating
= 0V, Voltage is with Respect
Pin
= 0V, Voltage is with Respect
CLASS
NEG
= 57V, For T2P, Must
SHDN
= 57V
PORTP
= 52V, V
, V
Resistor
CLASS
NEG
= 3V (Note 7)
PORTP
= V
NEG
= 30.9Ω,
PORTP
PORTN
= 54V
= 4V, Output
< 21V
= 0V
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
V
23.25
1.261
IN(OFF)
12.5
30.0
2.57
12.0
MIN
100
1.5
4.1
1.4
60
3
LTC4269-2
71.0
1.32
TYP
100
460
240
0.7
5.2
26.00
1.379
MAX
21.0
37.2
5.40
1.35
0.40
±3.5
0.45
0.15
16.5
180
700
350
9.8
1.0
0.4
6.5
60
11
11
25
1
1
1
1
42692fb
UNITS

mA
mA
mA
mA
kΩ
kΩ
kΩ
ms
kΩ
µA
µA
µA
µA
µA
%
Ω
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V