V7812-500-SMT(2009) Ver la hoja de datos (PDF) - CUI INC
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V7812-500-SMT Datasheet PDF : 5 Pages
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PART NUMBER: V78XX-500-SMT
rev.
page 3 of 5
date 04/2009
DESCRIPTION: DC switching regulator, non-isolated
TYPICAL APPLICATION CIRCUIT
Choose a ceramic type capacitors; C3 is require ,for best performance , use a 100 F or more capacitor please.
Vin
1 V78XX-500-SMT 5
Vo u t
C1
106K/50V
10
ON /OF F
GND
7 ,9
6
C5
470pF
R1
C2
C3
226K/25V 100 F
R2
GND
1. C1,C2: Use ceramic capacitors; C3: Use a 100 µF or more capacitor.
2. C1,C2 are required and should be placed close to the pins of the converter, with shortest possible leads.
3. No parallel connection or plug and play.
EXTERNAL CAPACITOR TABLE
Part
Number
C1
C2
(ceramic capacitor) (ceramic capacitor)
V7803-500-SMT
10uF/50V
22uF/16V
V7805-500-SMT
10uF/50V
22uF/16V
V7812-500-SMT
10uF/50V
10uF/25V
V7815-500-SMT
10uF/50V
10uF/25V
OUTPUT TRIMMING
Part Name
Vo nom
V7803-500-SMT
3.3V
V7805-500-SMT
5.0V
V7812-500-SMT
12V
V7815-500-SMT
15V
Trim Down
R 1(KΩ )
6 1 *Vo - 7 5 . 1 0
=
3 . 3 -Vo
6 1 * Vo -9 1 . 5 2
=
5.0 -Vo
7 1 *Vo - 2 8 7 . 0 2
=
12-Vo
6 6*Vo -26 9.37
=
15-Vo
Trim Up
R2(KΩ )
7 5 . 1 0 -1 0 *Vo
=
Vo -3.3
9 1 . 5 2 -1 0 *Vo
=
Vo -5.0
2 8 7 . 0 2 - 2 0 * Vo
=
Vo -1 2
2 6 9 . 3 7 - 1 5 * Vo
=
Vo -1 5
To trim the output of the device input the desired output voltage (Vo) into the proper equation.
R1 trims the output voltage down and R2 trims the voltage up. If not using the trim feature
place a 470pF ceramic capacitor between pin 6 and GND. Make sure that the desired output
voltage is within the trim range.
20050 SW 112th Ave. Tualatin, Oregon 97062 phone 503.612.2300 fax 503.612.2382
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