V7803-1000-SMT-TR(2012) Ver la hoja de datos (PDF) - CUI INC
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V7803-1000-SMT-TR Datasheet PDF : 6 Pages
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CUI Inc │ SERIES: V78-1000-SMT │ DESCRIPTION: NON-ISOLATED SWITCHING REGULATOR
date 10/31/2012 │ page 5 of 6
ADJUSTMENT RESISTOR VALUES
MODEL
Vo (nominal)
Vadj (V)
1.5
1.8
2.5
3.0
3.3
3.6
3.9
4.5
4.9
5.0
5.1
5.5
6.0
6.5
V7802
2.5 V
R1 (kΩ) R2 (kΩ)
51.1
-
104.3
-
-
-
-
88.7
-
41.3
-
20.1
-
8.0
-
-
-
-
-
-
-
-
-
-
-
-
-
-
V7803
3.3 V
R1 (kΩ) R2 (kΩ)
-
-
15.4
-
87
-
339
-
-
-
-
121
-
51.0
-
16.6
-
8.0
-
6.5
-
5.2
-
1.1
-
-
-
-
V7805
5.0 V
R1 (kΩ) R2 (kΩ)
-
-
-
-
9.7
-
30.5
-
48.8
-
75
-
115
-
338
-
1,835
-
-
-
-
426
-
58.7
-
16.9
-
3.2
The R1, R2 in the above table are used to set the output voltage. If no need to adjust the output voltage, connect a ceramic capacitor to
GND with 470pF typical value for increase immunity. Insure the output voltage is in the adjust range or else may cause permanent
damage to the device. Fine-tune output voltage must appease Vin-Vo>2V.
EMC RECOMMENDED CIRCUIT
+Vin
L1
TVS
C1
GND
V7805-1000-SMT
1
5
10 7,9
6
ON/OFF
C2
470pF
+Vo
RL
GND
TVS: SMCJ18A, 1500W
L1: 68 μH
C1: 680 μF / 50 V electrolytic capacitors
+Vin
L2
C3
GND
V7805-1000-SMT
1
5
10 7,9
6
ON/OFF
C4
470pF
L2: 516 μH
C3: 1 μF / 50 V ceramic capacitor
+Vo
RL
GND
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