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YNV05T10 DC-DC Converter Data Sheet
3.0-5.5 VDC Input; 0.7525-3.63 VDC Programmable @ 10A
Operation
Input and Output Impedance
160
140
120
The YNV05T10 non-isolated converter should be
connected via a low impedance to the DC power
source. In many applications, the inductance
associated with the distribution from the power
source to the input of the converter can affect the
100
80
60
40
20
0
Vin=5.0V
Vin=3.3V
stability of the converter. It is recommended to use
0
1
2
3
4
decoupling capacitors (minimum 47 μ F) placed as
close as possible to the converter input pins in
order to ensure stability of the converter and
reduce input ripple voltage. Internally, the
converter has 52 uF (low ESR ceramics) of input
capacitance.
In a typical application, low - ESR tantalum or
POS capacitors will be sufficient to provide
adequate ripple voltage filtering at the input of the
converter. However, very low ESR ceramic
capacitors 47 μ F-100 μ F are recommended at the
input of the converter in order to minimize the
input ripple voltage. They should be placed as
close as possible to the input pins of the converter.
The YNV05T10 has been designed for stable
operation with or without external output
capacitance. Low ESR ceramic capacitors placed
as close as possible to the load (Min 47 μ F) are
recommended for improved transient performance
and lower output voltage ripple.
Vout [V]
Fig. B : Input Voltage Ripple, C IN = 470 μ F polymer +
2x47 μ F ceramic
Fig. A shows input voltage ripple for various output
voltages using four 47 μ F input ceramic
capacitors. The same plot is shown in Fig. B with
one 470 μ F polymer capacitor (6TPB470M from
Sanyo) in parallel with two 47 μ F ceramic
capacitors at full load.
ON/OFF (Pin 10)
The ON/OFF pin is used to turn the converter on
or off remotely via a system signal. There are two
remote control options available, positive logic
(standard option) and negative logic, and both are
referenced to GND. Typical connections are
shown in Fig. C.
Nex -v Series
It is important to keep low resistance and low
inductance PCB traces when the connecting load
7,8
Vin
TM
Converter
SENSE
3
to the output pins of the converter in order to
maintain good load regulation.
Vin
R*
10
ON/OFF
1,2,4
Vout
9
TRIM
Rload
140
120
6
GND
GND
5
100
80
CONTROL
INPUT
R* is for negative logic option only
60
40
20
Vin=5.0V
Vin=3.3V
Fig. C: Circuit configuration for ON/OFF function.
The positive logic version turns the converter on
0
0
1
2
Vout [V]
3
4
when the ON/OFF pin is at a logic high or left
open, and turns converter off when at a logic low
or shorted to GND.
Fig. A : Input Voltage Ripple, C IN = 4x47 μ F ceramic.
The negative logic version turns the converter on
when the ON/OFF pin is at a logic low or left open,
and turns the converter off when the ON/OFF pin
is at a logic high or connected to Vin.
MCD10198 Rev. 1.0, 23-Jun-10
Page 5 of 26
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