SC443ULTRT Semtech, SC443ULTRT Datasheet - Page 10

• Manufacturer Part Number: SC443ULTRT
• Description: TVS
• Manufacturer: Semtech

Specifications of SC443ULTRT

• Constant Current: *
• Constant Voltage: *
• Topology: *
• Number Of Outputs: *
• Internal Driver: *
• Type - Primary: *
• Type - Secondary: *
• Frequency: *
• Voltage - Supply: *
• Voltage - Output: *
• Mounting Type: Surface Mount
• Package / Case: 16-UFQFN Exposed Pad
• Operating Temperature: *
• Current - Output / Channel: *
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: SC443ULTRTTR

5
5
Block Diagram
© 2008 Semtech Corp.
IOGND
OVPIN
IOSET
VOUT
IO2
SS
IO3
IO1
0.8mA
0.8mA
LED CURRENT
SETTING
ONE IO CHANNEL SHOWN
OVP
Detect
LED OPEN CIRCUIT
PROTECTION
HICCUP
OVP
Fault
4
4
CURRENT
SOURCE
1.5uA
1.5uA
5uA
5uA
3V3
Figure 1. SC443 Block Diagram
DISABLE1
HICCUP
CONTROL
LOGIC
HICCUP
3
HICCUP
3
I to V
Fault
-
UVLO
TSD
OSC
FSET
ILIM
ISENSE
UVLO & TSD
SS
S
R
Bandgap
Q
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-
-
2
2
SC443
SW
PGND
COMP
VIN
AGND
PWM
EN
0