SI3500-A-GM Silicon Laboratories Inc, SI3500-A-GM Datasheet - Page 6

• Manufacturer Part Number: SI3500-A-GM
• Description: IC POE SWITCH PWR OVER LAN 20QFN
• Manufacturer: Silicon Laboratories Inc
• Type: Power over Ethernet Switch (PoE)r

Specifications of SI3500-A-GM

• Package / Case: 20-QFN
• Applications: IP Phones, Power over LAN, Network Routers and Switches
• Internal Switch(s): Yes
• Current Limit: 525mA
• Voltage - Supply: 42 V ~ 57 V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Minimum Operating Temperature: - 10 C
• Mounting Style: SMD/SMT
• Product: Ethernet Controllers
• Maximum Operating Temperature: + 85 C
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant, Lead free / RoHS Compliant
• Other names: 336-1844-5

Si3500
Table 5. Electrical Characteristics
Table 7. Package Thermal Characteristics
6
Table 6. Total Power Dissipation
Parameter
Thermal resistance
(junction to ambient)
Parameter
Current Limit
Hotswap FET On-Resistance +
R
Switcher Frequency
Maximum Switcher Duty Cycle
Switching FET On-Resistance
Regulated Feedback @ pin FB
Regulated Output Voltage Tolerance
VDD accuracy @ 0.8 mA
Softstart charging current
Thermal Shutdown
Thermal Shutdown Hysteresis
Notes:
Description
Power Dissipation
SENSE
1. At turn-on, before the HSO load capacitor is charged, the current limit is set at the inrush level. After the capacitor has
2. Applies to non-isolated applications only (VOUT on schematic in Figure 1).
been charged within ~1.25 V of VNEG, the operating current limit is engaged. This higher current limit remains active
until the UVLO lower limit has been tripped or until the hotswap switch is sufficiently current-limited to cause a foldback
of the HSO voltage.
1
VIN = 50 V, VOUT = 5 V, 2 A
2
Symbol

2
JA
Condition
Output voltage tolerance
ISOSSFT connected to
Junction temperature
42 V < VPOS < 57 V
Still air; assumes a minimum of
nine thermal vias are connected
to a 2 in
the package “pad” node
(VNEG).
Non-isolated
Description
Operating
@ VOUT
DC Avg.
Isolated
Inrush
VDD
Rev. 1.1
2
Test Condition
heat spreader plane for
Min
—
Min
400
4.5
0.5
0.3
—
—
—
—
—
—
—
—
–5
Typ
0.7
Typ
1.23
Typ
140
525
350
160
44
50
25
13
—
—
—
—
—
Max
—
Max
0.86
1.5
5.5
—
—
—
—
25
—
—
—
—
5
Units
°C/W
Units
W
Unit
kHz
mA
µA
mA
µA
°C
°C
%
%


V
V