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UPC337 Datasheet(PDF) 3 Page - NEC

Part # UPC337
Description  3-TERMINAL NEGATIVE ADJUSTABLE REGULATOR
PDF  8 Pages
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Manufacturer  NEC [NEC]
Direct Link  http://www.nec.com/
Logo NEC - NEC

UPC337 Datasheet(HTML) 3 Page - NEC

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3
µPC337
TYPICAL CONNECTION
Remark R1, R2 : Resistor to set the output voltage.
VO = (1 +
) • VREF + IADJ • R2 = (1 +
) • VREF
VO (V)
R2 (
Ω : TYP.)
–1.25
0
–2.5
120
–5.0
360
–12
1032
–24
2184
–30
2760
CIN
: Need to stop the oscillation for the long input wiring length.
CO
: Need to stop the oscillation for the long output wiring length.
Improve the transient stability of the output voltage when the lord current is suddently changed.
CADJ
: Improve the ripple rejection and the oscillate rejection.
D1
: Protect against CADJ from output short.
D2
: Need for VIN > VO.
R2
R1
R2
R1
•
•
PC337
INPUT
OUTPUT
CADJ
10 F
VO
D1
D2
R2
ADJ
R1
120
Ω
CIN
1 F
CO
4.7 F
VIN
+
+
µ
µ
µ
µ



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