Dc-dc switching regulator – Powersolve PMQ7250 Series User Manual
Page 2
Powersolve Electronics Ltd. 8A Arnhem Road, Newbury, RG14 5RU. England
Tel: 01635 521858 Fax: 01635 523771 Email: [email protected]
www.powersolve.co.uk
DC-DC Switching Regulator
Test Configurations
Trim resistors for common output voltages
PMQ7250-1 PMQ7250-2
Output Voltage Trimming
Resistor values are in Ω, Vout is desired output voltage:
Formula: PMQ7250-1
Formula: PMQ7250-2
Rtrim = 10500 -3480 = Resistor Value
Rtrim = 10500 -1000 = Resistor Value
Vout-3.018
Vout-5.021
Example: Trim to 5V
Example: Trim to 12V
Rtrim = 3037.8 -3480 = 1817Ω
Rtrim = 10500 -1000 = 504Ω
5 -3.018
12 -5.021
V out
Resistor (kΩ)
Vout
Resistor (kΩ)
3V
open cct
5V
open cct
4V
7.212K
6V
9.72K
5V
1.817K
7V
4.3K
6V
0.041K
8V
2.525K
9V
1.64K
10V
1.11K
11V
0.756K
12V
0.505K
13V
0.316K
14V
0.169K
15V
0.0522K
2
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