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YNV05T06 DC-DC Converter Data Sheet
3.0-5.5 VDC Input; 0.7525-3.63 VDC Programmable @ 6A
Table 1: Trim Resistor Value
Nex -v Series
Vin
R*
Vin
ON/OFF
TM
Converter
(Top View)
Vout
V 0-REG [V] R TRIM [k ? ]
0.7525 open
1.0
80.02
The Closest
Standard Value [k ? ]
80.6
GND
TRIM
Rload
1.2
1.5
41.97
23.08
42.2
23.2
CONTROL
INPUT
Fig. C: Circuit configuration for ON/OFF function.
Output Voltage Programming (Pin 2)
1.8
2.0
2.5
3.3
3.63
15.00
11.78
6.95
3.16
2.21
15
11.8
6.98
3.16
2.21
The output voltage can be programmed from
0.7525V to 3.63V by connecting an external
resistor between TRIM pin (Pin 2) and GND pin
(Pin 3); see Fig. D. Note that when a trim resistor
is not connected, the output voltage of the
converter is 0.7525V.
The output voltage can also be programmed by an
external voltage source. To make trimming less
sensitive, a series external resistor Rext is
recommended between the TRIM pin and the
programming voltage source. Control Voltage can
be calculated by the formula:
A trim resistor, R TRIM , for a desired output voltage
can be calculated using the following equation:
V CTRL ? 0 . 7 ?
(5.1 1 ? R EXT )(V O -REQ - 0.7525)
30.1
[V]
R T RIM ?
21.07
(V O - REQ - 0.7525)
? 5.11
[k ? ]
where,
where,
R TRIM ? Required value of trim resistor [k ? ]
V O ? REQ ? Desired (trimmed) output voltage [V]
Note that the tolerance of a trim resistor directly
affects the output voltage tolerance. It is
recommended to use standard 1% or 0.5%
resistors; for tighter tolerance, two resistors in
parallel are recommended rather than one
standard value from Table 1.
The ground pin of the trim resistor should be
connected directly to the converter GND pin with
no voltage drop in between. Table 1 provides the
trim resistor values for popular output voltages.
V CTRL ? Control voltage [V]
R EXT ? External resistor between TRIM pin and
voltage source; the value can be chosen
depending on the required output voltage range
[k ? ]
Control voltages with R EXT ? 0 and R EXT ? 15K are
shown in Table 2.
Table 2: Control Voltage [Vdc]
V 0-REG [V]
V CTRL (R EXT = 0) V CTRL (R EXT = 15 K)
Nex -v Series
Vin
Vin
ON/OFF
TM
Converter
(Top View)
Vout
0.7525
1.0
1.2
1.5
0.700
0.658
0.624
0.573
0.700
0.535
0.401
0.201
GND
TRIM
R TRIM
Rload
1.8
2.0
0.522
0.488
0.000
-0.133
2.5
3.3
0.403
0.268
-0.468
-1.002
Fig. D: Configuration for programming output voltage.
MCD10197 Rev. 1.0, 21-Jun-10
Page 6 of 25
3.63
0.212
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