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| UM5237 Datasheet, PDF (4/6 Pages) Unisonic Technologies – 3-TERMINAL ADJUSTABLE REGULATOR | |||
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UM5237
ï® TEST CIRCUIT
Preliminary
(a) Standard test circuit
VO=VREF
ï¦ï§ï§ï¨1ï«
R2
R1
ï¶
ï·ï·ï¸
ï»
1.26 ï´
ï¦ï§ï¨1ï«
R2
4.3
ï¶
ï·ï¸
(V)
R2=R1
ï¦
ï§ï§ï¨
VO
VREF
ï 1ï¶ï·ï·ï¸
ï»
4.3
ï´
ï¦
ï§
ï¨
VO
1.26
ï 1ï·ï¶ (Kâ¦)
ï¸
(R1=4.3Kâ¦, VRERâ1.26V)
LINEAR INTEGRATED CIRCUIT
(b) Ripple rejection test circuit
f=120Hz, ei=0.1Vrms
2SB1314
VI
1
220
UTC
3
UM5237
C
0.33µF
2
+
R2
CREF
R1
4.3K
+ C RL
47µ
C
+
IL
RR=20 log eeoi (dB)
VV eo
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
4 of 6
QW-R101-040.c
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