Data Sheet
Pico TLynxTM 6A: Non-isolated DC-DC Power Modules
January 13, 2011
2.4 – 5.5Vdc input; 0.6Vdc to 3.63Vdc output; 6A output current
6
5
Vout
VIN(+)
VO(+)
TRIM
Upper Limit
4
3
2
1
0
ON/OFF
LOAD
Lower Limit
R
trim
GND
0.5
1
1.5
2
2.5
3
3.5
4
Figure 41. Circuit configuration for programming
output voltage using an external resistor.
Output Voltage (V)
Figure 40. Output Voltage vs. Input Voltage Set
Point Area plot showing limits where the output
voltage can be set for different input voltages.
Remote Sense
The Pico TLynxTM 6A modules have a Remote Sense
feature to minimize the effects of distribution losses by
regulating the voltage at the SENSE pin. The voltage
between the SENSE pin and VOUT pin must not
exceed 0.5V. Note that the output voltage of the module
cannot exceed the specified maximum value. This
includes the voltage drop between the SENSE and Vout
pins. When the Remote Sense feature is not being
used, connect the SENSE pin to the VOUT pin.
Without an external resistor between Trim and GND
pins, the output of the module will be 0.6Vdc. To
calculate the value of the trim resistor, Rtrim for a
desired output voltage, use the following equation:
1.2
Vo − 0.6
Rtrim =
kΩ
(
)
Rtrim is the external resistor in kΩ
Voltage Margining
Vo is the desired output voltage.
Output voltage margining can be implemented in the
Pico TLynxTM 6A modules by connecting a resistor,
Table 1 provides Rtrim values required for some
common output voltages.
R
margin-up, from the Trim pin to the ground pin for
margining-up the output voltage and by connecting a
resistor, Rmargin-down, from the Trim pin to the Output pin
for margining-down. Figure 42 shows the circuit
configuration for output voltage margining. The POL
Programming Tool, available at www.lineagepower.com
under the Design Tools section, also calculates the
values of Rmargin-up and Rmargin-down for a specific output
voltage and % margin. Please consult your local
Lineage Power technical representative for additional
details.
Table 1
VO, set (V)
Rtrim (KΩ)
0.6
1.0
1.2
1.5
1.8
2.5
3.3
Open
3.0
2.0
1.333
1.0
0.632
0.444
By using a ±0.5% tolerance trim resistor with a TC of
±25ppm, a set point tolerance of ±1.5% can be 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 trim resistor needed for a specific output
voltage.
LINEAGE POWER
14
LINEAGEPOWER [ LINEAGE POWER CORPORATION ]
