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UPC2933AT Datasheet(PDF) 4 Page - NEC

Part # UPC2933AT
Description  THREE-TERMINAL LOW DROPOUT VOLTAGE REGULATOR
PDF  16 Pages
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Manufacturer  NEC [NEC]
Direct Link  http://www.nec.com/
Logo NEC - NEC

UPC2933AT Datasheet(HTML) 4 Page - NEC

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Data Sheet G15374EJ2V0DS
4
µµµµPC2933A, 2905A
ABSOLUTE MAXIMUM RATINGS (TA = 25°C unless otherwise specified)
Rating
Parameter
Symbol
µ PC2933AHF,
2905AHF
µPC2933AHB, 2905AHB
µPC2933AT, 2905AT
Unit
Input Voltage
VIN
20
V
Internal Power Dissipation
Note
(TC = 25
°C)
PT
15
10
W
Operating Ambient Temperature
TA
–30 to +85
°C
Operating Junction Temperature
TJ
–30 to +150
°C
Storage Temperature
Tstg
–55 to +150
°C
Thermal Resistance (junction to case)
Rth(J-C)
7
12.5
°C/W
Thermal Resistance (junction to ambient)
Rth(J-A)
65
125
°C/W
Note Internally limited. When the operating junction temperature rises over 150
°C, the internal circuit shuts down the
output voltage.
Caution If the absolute maximum rating of any of the above parameters is exceeded even momentarily, the
quality of the product may be degraded. In other words, absolute maximum ratings specify the
values exceeding which the product may be physically damaged. Be sure to use the product with
these ratings never exceeded.
STANDARD CONNECTION
INPUT
CIN
PC2933A, 2905A
OUTPUT
COUT
D1
D2
+
CIN: 0.1
µF or higher. Set this value according to the length of the line between the regulator and INPUT pin. Be sure
to connect CIN to prevent parasitic oscillation. Use of a film capacitor or other capacitor with excellent voltage and
temperature characteristics is recommended. If using a laminated ceramic capacitor, it is necessary to ensure
that CIN is 0.1
µF or higher for the voltage and temperature range to be used.
COUT: 47
µF or higher. Be sure to connect COUT to prevent oscillation and improve excessive load regulation. Place
CIN and COUT as close as possible to the IC pins (within 2 cm). Also, use an electrolytic capacitor with low
impedance characteristics if considering use at sub-zero temperatures.
D1: If the OUTPUT pin has a higher voltage than the INPUT pin, connect a diode.
D2: If the OUTPUT pin has a lower voltage than the GND pin, connect a Schottky barrier diode.
Caution Make sure that no voltage is applied to the OUTPUT pin from external.
5



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