UC3903N UNITRODE, UC3903N Datasheet - Page 2

• Manufacturer Part Number: UC3903N
• Description: IC, SUPPLY/LINE MONITOR 18mA, 40V 18-DIP
• Manufacturer: UNITRODE

Specifications of UC3903N

• Threshold Voltage: 2.5V
• No. Of Supervisors / Monitors: 4
• Supply Voltage Range: 8V To 40V
• Reset Type: Active-Low
• Supply Current: 18mA
• Delay Time: 30ms
• Digital Ic Case Style: DIP
• No. Of Pins: 18
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

UC1903
UC2903
UC3903
SLUS233A – OCTOBER 1999 – REVISED SEPTEMBER 2008
DESCRIPTION (CONT.)
An additional, uncommitted, general purpose op-amp is also included. This op-amp, capable of sourcing 20 mA
of output current, can be used for a number of auxiliary functions including the sensing and amplification of a
feedback error signal when the 2.5-V output is used as a system reference.
These parts operate over an 8-V to 40-V input supply range and require a typical stand-by current of only 7 mA.
CONNECTION DIAGRAMS
ABSOLUTE MAXIMUM RATINGS
over operating free-air temperature range (unless otherwise noted)
(1) Voltages are referenced to ground (Pin 3). Currents are positive into, negative out of, the specified terminals. Consult Packaging Section
2
+VIN
WINDOW ADJUST
INVERT INPUT
of Databook for thermal limitations and considerations of package.
V
Submit Documentation Feedback
Supply Voltage
Open Collector Output Voltages.
Open Collector Output Currents.
Sense 1-4 Input Voltages
Line/Switcher Sense Input Voltage
Op-Amp and Inverter Input Voltages
Op-Amp and Inverter Output Currents .
Window Adjust Voltage.
Delay Pin Voltages
Reference Output Current
Power Dissipation at T
Power Dissipation at T
Operating Junction Temperature
Storage Temperature
Lead Temperature (Soldering, 10 Seconds)
REF
SENSE 4
SENSE 4
SENSE 3
SENSE 2
SENSE 1
(2.5 V)
GND
+VIN
J or N, DW PACKAGE
DIL-18, SOIC-18
(TOP VIEW)
1
2
3
4
5
6
7
8
9
A
C
18
17
16
15
14
13
12
11
10
= 25°C
= 25°C
G.P. OP-AMP OUT
G.P. OP-AMP INV.
G.P. OP-AMP N.I.
LINE/SWITCHER SENSE
POWER OK
UV DELAY
UV FAULT
OV FAULT
OV DELAY
(1)
(1)
Product Folder Link(s):
(1)
........................................................................................................................................
UC1903 UC2903 UC3903
WINDOW ADJUST
SENSE 4 INVERT
SENSE 4
INPUT
GND
NC
Copyright © 1999–2008, Texas Instruments Incorporated
7
8
6
4
5
9
3
PLCC-20, LCC-20
Q, L PACKAGE
10
(TOP VIEW)
2
11 12 13
1 20 19
–55 to +150
–65 to +150
–0.3 to +20
–0.3 to +40
–0.3 to +40
0.0 to +10
0.0 to +5
VALUE
1000
2000
+40
+40
–40
–40
300
50
18
17
16
15
14
G.P. OP-AMP OUT
LINE/SWITCHER
SENSE
POWER OK
UV DELAY
UV FAULT
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UNIT
mW
mW
mA
mA
mA
°C
°C
V
V
V
V
V
V
V
C