Data Sheet
Austin MiniLynxTM SMT Non-isolated Power Modules:
February 26, 2009
2.4 – 5.5Vdc input; 0.75Vdc to 3.63Vdc Output; 3A output current
margining-up the output voltage and by connecting a
Feature Descriptions (continued)
resistor, Rmargin-down, from the Trim pin to the Output
pin for margining-down. Figure 33 shows the circuit
configuration for output voltage margining. The POL
Programming Tool, available at
Output Voltage Programming (continued)
For example, to program the output voltage of the
Austin MiniLynxTM module to 1.8 Vdc, Rtrim is
calculated is follows:
www.lineagepower.com under the Design Tools
section, also calculates the values of Rmargin-up and
R
margin-down for a specific output voltage and % margin.
Please consult your local Lineage Power technical
representative for additional details.
21070
⎡
⎤
Rtrim =
− 5110
⎢
⎣
⎥
⎦
1.8 − 0.7525
Rtrim =15.004kΩ
Vo
Rmargin-down
VIN(+)
VO(+)
Austin Lynx or
Lynx II Series
Q2
LOAD
ON/OFF
TRIM
Trim
R
Rmargin-up
trim
GND
Rtrim
Q1
Figure 32. Circuit configuration to program
output voltage using an external resistor.
GND
Figure 33. Circuit Configuration for margining
Output voltage.
Table 1 provides Rtrim values required for some
common output voltages.
Table 1
V
O, set (V)
Rtrim (KΩ)
Open
0.7525
1.2
41.973
23.077
15.004
6.947
1.5
1.8
2.5
3.3
3.160
Using 1% tolerance trim resistor, set point
tolerance of ±2% is achieved as specified in the
electrical specification. The POL Programming
Tool, available at www.lineagepower.com under
the Design Tools section, helps determine the
required external trim resistor needed for a specific
output voltage.
Voltage Margining
Output voltage margining can be implemented in the
Austin MiniLynxTM modules by connecting a resistor,
Rmargin-up, from the Trim pin to the ground pin for
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13
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