High-Speed Response Non-Isolated POL DC-DC Converter
4A/9.5A BSV-M Series
8-4 Adjustable method for output voltage
Keep Trim pin (1pin) OPEN, when using output voltage at 3.3V without adjustment. Output voltage
may be adjusted between 0.8 to 3.3V by connecting a resistor between Trim pin (1pin) and GND pin
(3pin).
Wiring for Trim pin should be short and straight preferably when using adjustable output voltage
feature. If noise appears on the pin, it causes mal-function.
The below formula should be referred for external resistance. It is important to check output voltage
and adjust resistance in an actual device.
When setting output voltage between 0.8V to 3.3V
R2 R4Vout
(Ω)
Rx
R3
R1 R2 R4 I1 R2Vout
R1=51Ω, R2=182Ω, R3=24kΩ, R4=94.3kΩ, I1=0.02733mA, Vout=Desired output voltage (V)
e.g.
Desired output Rx
voltage (V) value (kΩ)
OPEN
+Vout
calculated
2
R1
3.3
2.5
2.0
1.8
1.5
1.2
1.0
0.8
271.0(270+1)
121.1(120+1.1)
89.5(82+7.5)
54.6(51+3.6)
30.0
R3
Trim
1
I1
Rx
17.0(15+2)
6.2
GND
3
9
BDD20150226
BELLNIX [ Bellnix ]
