Bel Power Solutions point-of-load converters are
recommended for use with regulated bus
converters in an Intermediate Bus Architecture
(IBA). The YNV12T05 non-isolated DC-DC
converters deliver up to 5 A of output current in
an
industry-standard
through-hole
(SIP)
package. The YNV12T05 converters operate
from a 9.6 VDC–14 VDC input. These converters
are ideal choices for Intermediate Bus
Architectures where Point-of-Load power
delivery is generally a requirement. They provide
a resistor-programmable regulated output
voltage of 0.7525 to 5.5 VDC.
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
RoHS lead-free solder and lead-solder-exempted
products are available
Delivers up to 5 A (27.5 W)
Industry-standard footprint and pinout
Single-in-Line (SIP) Package:
0.90” x 0.44” x 0.240”
22.86 mm x 11.16 mm x 6.10 mm
Weight: 0.07 oz [2.00 g]
Synchronous Buck Converter Topology
Start-up into pre-biased output
No minimum load required
Operating ambient temperature: -40 °C to 85 °C
Remote ON/OFF
Fixed-frequency operation
Auto-reset output overcurrent protection
Auto-reset overtemperature protection
High reliability, MTBF approx. 71.8 million hours
All materials meet UL94, V-0 flammability rating
Safety approved to UL/CSA 62368-1 and
EN/IEC 62368-1
The YNV12T05 converters provide exceptional
thermal performance, even in high temperature
environments with minimal airflow. This is
accomplished using circuit, packaging and
processing techniques to achieve ultra-high
efficiency, excellent thermal management, and a
very sleek body profile.
The sleek body profile and the preclusion of heat
sinks minimize impedance to system airflow,
thus enhancing cooling for both upstream and
downstream devices. The use of 100%
automation for assembly, coupled with
advanced power electronics and thermal design,
results in a product with extremely high reliability.
▪
▪
▪
▪
▪
Intermediate Bus Architectures
Telecommunications
Data Communications
Distributed Power Architectures
Servers, Workstations
▪
▪
High Efficiency – no heat sink required
Reduces Total Solution Board Area
Minimizes Part Numbers in Inventory
▪
2
YNV12T05 DC-DC Converter
Conditions: TA = 25 ºC, Airflow = 300 LFM (1 m/s), Vin = 12 VDC, Vout = 0.7525 - 5.5 VDC, unless otherwise specified.
PARAMETER
NOTES
MIN
Continuous
TYP
MAX
UNITS
-0.3
15
VDC
Operating Ambient Temperature
-40
85
°C
Storage Temperature
-55
125
°C
5.5
VDC
0.5
VDC
ABSOLUTE MAXIMUM RATINGS
Input Voltage
FEATURE CHARACTERISTICS
Switching Frequency
480
kHz
Output Voltage Trim Range1
By external resistor, See Trim Table 1
Remote Sense Compensation1
Percent of VOUT(NOM)
Turn-On Delay Time2
Full resistive load
With Vin (Converter Enabled, then Vin applied)
From Vin = Vin(min) to Vo = 0.1* Vo(nom)
6.5
ms
With Enable (Vin = Vin(nom) applied, then enabled)
From enable to Vo = 0.1*Vo(nom)
6.5
ms
Rise time2 (Full resistive load)
From 0.1*Vo(nom) to 0.9*Vo(nom)
6.5
ms
ON/OFF Control (Negative Logic) 3
0.7525
Converter Off
2.4
Vin
VDC
Converter On
-5
0.8
VDC
14
VDC
INPUT CHARACTERISTICS
Operating Input Voltage Range
9.6
12
Input Under Voltage Lockout
Turn-on Threshold
Turn-off Threshold
Maximum Input Current
Input Reflected-Ripple Current - is
VDC
8.4
VDC
5 ADC Out @ 9.6 VDC In
VOUT = 5.0 VDC
2.9
ADC
VOUT = 3.3 VDC
2.0
ADC
VOUT = 2.5 VDC
1.6
ADC
VOUT = 2.0 VDC
1.3
ADC
VOUT = 1.8 VDC
1.2
ADC
VOUT = 1.5 VDC
1.0
ADC
VOUT = 1.2 VDC
0.85
ADC
VOUT = 1.0 VDC
0.75
ADC
VOUT = 0.7525 VDC
0.6
ADC
Input Stand-by Current (Converter disabled)
Input No Load Current (Converter enabled)
9.2
5
mA
VOUT = 5.0 VDC
85
mA
VOUT = 3.3 VDC
65
mA
VOUT = 2.5 VDC
55
mA
VOUT = 2.0 VDC
45
mA
VOUT = 1.8 VDC
40
mA
VOUT = 1.5 VDC
35
mA
VOUT = 1.2 VDC
30
mA
VOUT = 1.0 VDC
25
mA
VOUT = 0.7525 VDC
20
mA
See Fig. D for setup. (BW = 20 MHz)
10
mAP-P
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3
YNV12T05 DC-DC Converter
OUTPUT CHARACTERISTICS
Output Voltage Set Point (no load)
-1.5
Vout
+1.5
%Vout
Output Regulation
Over Line
Full resistive load @ 3.3 VDC
0.2
%Vout
Over Load
From no load to full load
0.4
%Vout
Output Voltage Range
(Overall operating input voltage, resistive
load and temperature conditions until end
of life )
Output Ripple and Noise – 20 MHz bandwidth
Over line, load and temperature (Fig. D)
Peak-to-Peak
-2.5
+2.5
%Vout
VOUT = 1.0 VDC
10
20
mVP-P
VOUT = 5.0 VDC
25
40
mVP-P
Min ESR > 1mΩ
1,000
μF
Min ESR > 10 mΩ
2,000
μF
5
ADC
Peak-to-Peak
External Load Capacitance
Plus full load (resistive)
Output Current Range
0
Output Current Limit Inception (IOUT)
Output Short- Circuit Current, RMS Value
8.5
ADC
2
Arms
Co = 47 μF tant. + 1 μF ceramic
1201
mV
60
µs
Co = 47 μF tant. + 1 μF ceramic
1201
mV
60
µs
VOUT = 5.0 VDC
90.0
%
VOUT = 3.3 VDC
86.0
%
VOUT = 2.5 VDC
83.0
%
VOUT = 2.0 VDC
81.0
%
VOUT = 1.8 VDC
80.0
%
VOUT = 1.5 VDC
78.0
%
VOUT = 1.2 VDC
75.5
%
VOUT = 1.0 VDC
73.0
%
VOUT = 0.7525 VDC
68.0
%
Short = 10 mΩ, continuous
DYNAMIC RESPONSE
Iout step from 2.5 A to 5 A with di/dt = 5 A/μs
Settling Time (VOUT < 10% peak deviation)
Iout step change from 5 A to 2.5 A with di/dt = -5 A/μs
Settling Time (VOUT < 10% peak deviation)
EFFICIENCY
FULL LOAD (5 A)
Notes:
1
2
3
4
The output voltage should not exceed 5.5V (taking into account both the programming and remote sense compensation).
Note that start-up time is the sum of turn-on delay time and rise time.
The converter is on if ON/OFF pin is left open.
See attached waveforms for dynamic response and settling time for different output voltages.
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4
YNV12T05 DC-DC Converter
Input and Output Impedance
The Y-Series 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 stability
of the converter. It is recommended to use decoupling capacitors placed as close as possible to the converter’s input
pins in order to ensure stability of the converter and reduce input ripple voltage. Internally, the converter has 20 μF
(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 to 100 μF 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 YNV12T05 has been designed for stable operation with or without external capacitance. Low ESR ceramic
capacitors placed as close as possible to the load (minimum 47 μF) are recommended for better transient
performance and lower output voltage ripple.
It is important to keep low resistance and low inductance PCB traces for connecting load to the output pins of the
converter in order to maintain good load regulation.
ON/OFF (Pin 5)
The ON/OFF pin (Pin 5) is used to turn the converter on or off remotely via a system signal that is referenced to GND
(Pin 3). Typical connections are shown in Fig. A.
Vin
Y-Series
Vout
Converter
R*
(Top View)
ON/OFF
Vin
Rload
GND
TRIM
CONTROL
INPUT
Fig. A: Circuit configuration for ON/OFF function.
To turn the converter on the ON/OFF pin should be at a logic low or left open, and to turn the converter off the
ON/OFF pin should be at a logic high or connected to Vin.
The ON/OFF pin is internally pulled down. A TTL or CMOS logic gate, open-collector (open-drain) transistor can be
used to drive ON/OFF pin. When using open collector (open-drain) transistor, add a pull-up resistor (R*) of 75 k to
Vin as shown in Fig. A. This device must be capable of:
-
sinking up to 0.2 mA at a low level voltage of 0.8 V
sourcing up to 0.25 mA at a high logic level of 2.3 to 5 V
sourcing up to 0.75 mA when connected to Vin.
Output Voltage Programming (Pin 2)
The output voltage can be programmed from 0.7525 to 5.5 V by connecting an external resistor between the TRIM
pin (Pin 2) and the GND pin (Pin 3); see Fig. B.
A trim resistor, RTRIM, for a desired output voltage can be calculated using the following equation:
RTRIM =
10.5
−1
(VO -REQ - 0.7525)
[k]
where,
RTRIM = Required value of trim resistor [k]
VO−REQ = Desired (trimmed) output voltage [V]
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5
YNV12T05 DC-DC Converter
Y-Series
Converter
Vin
Vout
(Top View)
ON/OFF
Vin
Rload
TRIM
GND
RTRIM
Fig. B: Configuration for programming output voltage.
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’s GND pin (Pin 3) with no voltage
drop in between. Table 1 provides the trim resistor values for popular output voltages.
V0-REG [V]
RTRIM [kΩ]
0.7525
1.0
1.2
1.5
1.8
2.0
2.5
3.3
5.0
5.5
open
41.42
22.46
13.05
9.02
7.42
5.01
3.12
1.47
1.21
The Closest Standard
Value [kΩ]
41.2
22.6
13.0
9.09
7.50
4.99
3.09
1.47
1.21
Table 1: Trim Resistor Value
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 TRIM pin and programming voltage source. Control Voltage can be
calculated by the formula:
VCTRL = 0.7 −
(1 + REXT )(VO-REQ - 0.7525)
15
[V]
where,
VCTRL = Control voltage [V]
REXT = External resistor between TRIM pin and voltage source; the k value can be chosen depending on the required
output voltage range.
The control voltages with REXT = 0 and REXT = 15 k are shown in Table 2.
V0-REG [V]
0.7525
1.0
1.2
1.5
1.8
2.0
2.5
3.3
5.0
5.5
VCTRL (REXT = 0)
0.700
0.684
0.670
0.650
0.630
0.617
0.584
0.530
0.417
0.384
VCTRL(REXT = 15 k)
0.700
0.436
0.223
-0.097
-0.417
-0.631
-1.164
-2.017
-3.831
-4.364
Table 2: Control Voltage [VDC]
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6
YNV12T05 DC-DC Converter
Input Under-Voltage Lockout
Input under-voltage lockout is standard with this converter. The converter will shut down when the input voltage drops
below a pre-determined voltage; it will start automatically when Vin returns to a specified range.
The input voltage must be typically 9.2 V for the converter to turn on. Once the converter has been turned on, it will
shut off when the input voltage drops below typically 8.4 V.
Output Overcurrent Protection (OCP)
The converter is protected against overcurrent and short circuit conditions. Upon sensing an overcurrent condition, the
converter will enter hiccup mode. Once over-load or short circuit condition is removed, Vout will return to nominal value.
Overtemperature Protection (OTP)
The converter will shut down under an overtemperature condition to protect itself from overheating caused by operation
outside the thermal derating curves, or operation in abnormal conditions such as system fan failure. After the converter
has cooled to a safe operating temperature, it will automatically restart.
Safety Requirements
Approved to the latest edition and amendment of ITE Safety standards, UL/CSA 62368-1 and EN/IEC 62368-1
The maximum DC voltage between any two pins is Vin under all operating conditions. Therefore, the unit has ELV (extra
low voltage) output; it meets ES1 requirements under the condition that all input voltages are ELV.
The converter is not internally fused. To comply with safety agencies requirements, a recognized fuse with a maximum
rating of 7.5 Amps must be used in series with the input line.
General Information
The converter has been characterized for many operational aspects, to include thermal derating (maximum load current
as a function of ambient temperature and airflow) for vertical and horizontal mounting, efficiency, start-up and shutdown
parameters, output ripple and noise, transient response to load step-change, overload, and short circuit.
The figures are numbered as Fig. x.y, where x indicates the different output voltages, and y associates with specific
plots (y = 1 for the vertical thermal derating, …). For example, Fig. x.1 will refer to the vertical thermal derating for all
the output voltages in general.
The following pages contain specific plots or waveforms associated with the converter. Additional comments for
specific data are provided below.
Test Conditions
All data presented were taken with the converter soldered to a test board, specifically a 0.060” thick printed wiring
board (PWB) with four layers. The top and bottom layers were not metalized. The two inner layers, comprised of twoounce copper, were used to provide traces for connectivity to the converter.
The lack of metallization on the outer layers as well as the limited thermal connection ensured that heat transfer from
the converter to the PWB was minimized. This provides a worst-case but consistent scenario for thermal derating
purposes.
All measurements requiring airflow were made in the vertical and horizontal wind tunnels using Infrared (IR)
thermography and thermocouples for thermometry.
Ensuring components on the converter do not exceed their ratings is important to maintaining high reliability. If one
anticipates operating the converter at or close to the maximum loads specified in the derating curves, it is prudent to
check actual operating temperatures in the application. Thermographic imaging is preferable; if this capability is not
available, then thermocouples may be used. The use of AWG #40 gauge thermocouples is recommended to ensure
measurement accuracy. Careful routing of the thermocouple leads will further minimize measurement error. Refer to
Fig. C for optimum measuring thermocouple location.
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7
YNV12T05 DC-DC Converter
Fig. C: Location of the thermocouple for thermal testing.
Thermal Derating
Load current vs. ambient temperature and airflow rates are given in Figs. x.1 to x.2 for maximum temperature of 120
°C. Ambient temperature was varied between 25 °C and 85 °C, with airflow rates from 30 to 500 LFM (0.15 to 2.5
m/s), and vertical and horizontal converter mounting. The airflow during the testing is parallel to the long axis of the
converter, going from input pins to output pins.
For each set of conditions, the maximum load current is defined as the lowest of:
(i) The output current at which any MOSFET temperature does not exceed a maximum
specified temperature (120 °C) as indicated by the thermographic image, or
(ii) The maximum current rating of the converter (5A)
During normal operation, derating curves with maximum FET temperature less than or equal to
120 °C should not be exceeded. Temperature on the PCB at the thermocouple location shown in Fig. C should not
exceed 120 °C in order to operate inside the derating curves.
Efficiency
Figure x.3 shows the efficiency vs. load current plot for ambient temperature of 25 ºC, airflow rate of
200 LFM (1 m/s) and input voltages of 9.6 V, 12 V, and 14 V.
Power Dissipation
Fig. x.4 shows the power dissipation vs. load current plot for Ta = 25 ºC, airflow rate of 200 LFM (1 m/s) with vertical
mounting and input voltages of 9.6 V,
12 V, and 14 V.
Ripple and Noise
The output voltage ripple waveform is measured at full rated load current. Note that all output voltage waveforms are
measured across a 1 F ceramic capacitor. The output voltage ripple and input reflected ripple current waveforms are
obtained using the test setup shown in Fig. D.
iS
1 H
source
inductance
Vsource
Vin
Vout
Y-Series
CO
CIN
DC/DC
Converter
4 x 47F
ceramic
capacitor
GND
1F
ceramic
capacitor
47F
ceramic
capacitor
Vout
GND
Fig. D: Test Set-up for measuring input reflected ripple currents, is and output voltage ripple
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8
6
6
5
5
Load Current [Adc]
Load Current [Adc]
YNV12T05 DC-DC Converter
4
3
500 LFM (2.5 m/s)
400 LFM (2.0 m/s)
300 LFM (1.5 m/s)
200 LFM (1.0 m/s)
100 LFM (0.5 m/s)
30 LFM (0.15 m/s)
2
1
4
3
500 LFM (2.5 m/s)
400 LFM (2.0 m/s)
300 LFM (1.5 m/s)
200 LFM (1.0 m/s)
100 LFM (0.5 m/s)
30 LFM (0.15 m/s)
2
1
0
0
20
30
40
50
60
70
80
90
20
30
40
Ambient Temperature [°C]
50
60
70
80
90
Ambient Temperature [°C]
Fig. 5.0V.1: Available load current vs. ambient temperature
and airflow rates for Vout = 5.0 V converter mounted
vertically with Vin = 12 V, and maximum MOSFET
temperature 120 C.
Fig. 5.0V.2: Available load current vs. ambient temperature
and airflow rates for Vout = 5.0 V converter mounted
horizontally with Vin = 12 V, and maximum MOSFET
temperature 120 C.
0.95
4
Power Dissipation [W]
Efficiency
0.90
0.85
0.80
14 V
12 V
9.6 V
0.75
0.70
3
2
14 V
12 V
9.6 V
1
0
0
1
2
3
4
5
Load Current [Adc]
6
0
1
2
3
4
5
6
Load Current [Adc]
Fig. 5.0V.3: Efficiency vs. load current and input voltage for
Vout = 5.0 V converter mounted vertically with air flowing at
a rate of 200 LFM (1 m/s) and Ta = 25 C.
Fig. 5.0V.4: Power Loss vs. load current and input voltage for
Vout = 5.0 V converter mounted vertically with air flowing at
a rate of 200 LFM (1 m/s) and Ta = 25 C.
Fig. 5.0V.5: Turn-on transient for Vout = 5.0 V with
application of Vin at full rated load current (resistive) and 100
µF external capacitance at Vin = 12 V. Top trace: Vin (10
V/div.); Bottom trace: output voltage (1 V/div.); Time scale: 5
ms/div.
Fig. 5.0V.6: Output voltage ripple (20 mV/div.) at full rated
load current into a resistive load with external capacitance
100 μF ceramic and Vin = 12 V for Vout = 5.0 V. Time scale:
1 μs/div.
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YNV12T05 DC-DC Converter
Fig. 5.0V.8: Output voltage response for Vout = 5.0 V to
negative load current step change from 5 A to 2.5 A with
slew rate of -5A/μs at Vin = 12 V. Top trace: output voltage
(100 mV/div.); Bottom trace: load current (2 A/div.). Co =
100μF ceramic. Time scale: 20 μs/div.
6
6
5
5
Load Current [Adc]
Load Current [Adc]
Fig. 5.0V.7: Output voltage response for Vout = 5.0 V to
positive load current step change from 2.5 A to 5 A with slew
rate of 5 A/μs at Vin = 12 V. Top trace: output voltage (100
mV/div.); Bottom trace: load current (2 A/div.). Co = 100 μF
ceramic. Time scale: 20 μs/div.
4
3
500 LFM (2.5 m/s)
400 LFM (2.0 m/s)
300 LFM (1.5 m/s)
200 LFM (1.0 m/s)
100 LFM (0.5 m/s)
30 LFM (0.15 m/s)
2
1
4
3
500 LFM (2.5 m/s)
400 LFM (2.0 m/s)
300 LFM (1.5 m/s)
200 LFM (1.0 m/s)
100 LFM (0.5 m/s)
30 LFM (0.15 m/s)
2
1
0
0
20
30
40
50
60
70
80
90
20
30
40
Ambient Temperature [°C]
50
60
70
80
90
Ambient Temperature [°C]
Fig. 3.3V.1: Available load current vs. ambient temperature
and airflow rates for Vout = 3.3 V converter mounted
vertically with Vin = 12 V, and maximum MOSFET
temperature 120 C.
Fig. 3.3V.2: Available load current vs. ambient temperature
and airflow rates for Vout = 3.3 V converter mounted
horizontally with Vin = 12 V, and maximum MOSFET
temperature 120 C.
0.95
4
Power Dissipation [W]
Efficiency
0.90
0.85
0.80
14 V
12 V
9.6 V
0.75
0.70
3
2
14 V
12 V
9.6 V
1
0
0
1
2
3
4
5
6
0
1
Load Current [Adc]
Fig. 3.3V.3: Efficiency vs. load current and input voltage for
Vout = 3.3 V converter mounted vertically with air flowing at
a rate of 200 LFM (1 m/s) and Ta = 25 C.
2
3
4
5
6
Load Current [Adc]
Fig. 3.3V.4: Power Loss vs. load current and input voltage for
Vout = 3.3 V converter mounted vertically with air flowing at
a rate of 200 LFM (1 m/s) and Ta = 25 C.
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YNV12T05 DC-DC Converter
Fig. 3.3V.6: Output voltage ripple (20 mV/div.) at full rated
load current into a resistive load with external capacitance
100 μF ceramic and Vin = 12 V for Vout = 3.3 V. Time scale:
1 μs/div.
Fig. 3.3V.7: Output voltage response for Vout = 3.3 V to
positive load current step change from 2.5 A to 5 A with slew
rate of 5 A/μs at Vin = 12 V. Top trace: output voltage (100
mV/div.); Bottom trace: load current (2 A/div.). Co = 100 μF
ceramic. Time scale: 20 μs/div.
Fig. 3.3V.8: Output voltage response for Vout = 3.3 V to
negative load current step change from 5 A to 2.5 A with
slew rate of -5 A/μs at Vin = 12 V. Top trace: output voltage
(100 mV/div.); Bottom trace: load current (2 A/div.). Co = 100
μF ceramic. Time scale: 20 μs/div.
6
6
5
5
Load Current [Adc]
Load Current [Adc]
Fig. 3.3V.5: Turn-on transient for Vout = 3.3 V with
application of Vin at full rated load current (resistive) and 100
μF external capacitance at Vin = 12 V. Top trace: Vin (10
V/div.); Bottom trace: output voltage (1 V/div.); Time scale: 5
ms/div.
4
3
500 LFM (2.5 m/s)
400 LFM (2.0 m/s)
300 LFM (1.5 m/s)
200 LFM (1.0 m/s)
100 LFM (0.5 m/s)
30 LFM (0.15 m/s)
2
1
4
3
500 LFM (2.5 m/s)
400 LFM (2.0 m/s)
300 LFM (1.5 m/s)
200 LFM (1.0 m/s)
100 LFM (0.5 m/s)
30 LFM (0.15 m/s)
2
1
0
0
20
30
40
50
60
70
80
Ambient Temperature [°C]
Fig. 2.5V.1: Available load current vs. ambient temperature
and airflow rates for Vout = 2.5 V converter mounted
vertically with Vin = 12 V, and maximum MOSFET
temperature 120 C.
90
20
30
40
50
60
70
80
90
Ambient Temperature [°C]
Fig. 2.5V.2: Available load current vs. ambient temperature
and airflow rates for Vout = 2.5 V converter mounted
horizontally with Vin = 12 V, and maximum MOSFET
temperature 120 C.
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11
YNV12T05 DC-DC Converter
0.90
3.0
2.5
Power Dissipation [W]
Efficiency
0.85
0.80
0.75
14 V
12 V
9.6 V
0.70
2.0
1.5
1.0
14 V
12 V
9.6 V
0.5
0.65
0.0
0
1
2
3
4
5
6
0
1
Load Current [Adc]
2
3
4
5
6
Load Current [Adc]
Fig. 2.5V.3: Efficiency vs. load current and input voltage for
Vout = 2.5 V converter mounted vertically with air flowing at
a rate of 200 LFM (1 m/s) and Ta = 25 C.
Fig. 2.5V.4: Power Loss vs. load current and input voltage for
Vout = 2.5 V converter mounted vertically with air flowing at
a rate of 200 LFM (1 m/s) and Ta = 25 C.
Fig. 2.5V.5: Turn-on transient for Vout = 2.5 V with
application of Vin at full rated load current (resistive) and 100
μF external capacitance at Vin = 12 V. Top trace: Vin (10
V/div.); Bottom trace: output voltage (1 V/div.); Time scale: 5
ms/div.
Fig. 2.5V.6: Output voltage ripple (20 mV/div.) at full rated
load current into a resistive load with external capacitance
100 μF ceramic + 1 μF ceramic and Vin = 12 V for Vout = 2.5
V. Time scale: 2 μs/div.
Fig. 2.5V.7: Output voltage response for Vout = 2.5 V to
positive load current step change from 2.5 A to 5 A with slew
rate of 5 A/μs at Vin = 12 V. Top trace: output voltage (100
mV/div.); Bottom trace: load current (2 A/div.). Co = 100 μF
ceramic. Time scale: 20 μs/div.
Fig. 2.5V.8: Output voltage response for Vout = 2.5 V to
negative load current step change from 5 A to 2.5 A with
slew rate of -5 A/μs at Vin = 12 V. Top trace: output voltage
(100 mV/div.); Bottom trace: load current (2 A/div.). Co = 100
μF ceramic. Time scale: 20 μs/div.
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North America
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© 2020 Bel Power Solutions & Protection
BCD.00677_C1
Asia-Pacific
+86 755 298 85888
12
6
6
5
5
Load Current [Adc]
Load Current [Adc]
YNV12T05 DC-DC Converter
4
3
500 LFM (2.5 m/s)
400 LFM (2.0 m/s)
300 LFM (1.5 m/s)
200 LFM (1.0 m/s)
100 LFM (0.5 m/s)
30 LFM (0.15 m/s)
2
1
4
3
500 LFM (2.5 m/s)
400 LFM (2.0 m/s)
300 LFM (1.5 m/s)
200 LFM (1.0 m/s)
100 LFM (0.5 m/s)
30 LFM (0.15 m/s)
2
1
0
0
20
30
40
50
60
70
80
90
20
30
40
Ambient Temperature [°C]
Fig. 2.0V.1: Available load current vs. ambient temperature
and airflow rates for Vout = 2.0 V converter mounted
vertically with Vin = 12 V, and maximum MOSFET
temperature 120 C.
60
70
80
90
Fig. 2.0V.2: Available load current vs. ambient temperature
and airflow rates for Vout = 2.0 V converter mounted
horizontally with Vin = 12 V, and maximum MOSFET
temperature 120 C.
0.90
3.0
2.5
Power Dissipation [W]
0.85
Efficiency
50
Ambient Temperature [°C]
0.80
0.75
14 V
12 V
9.6 V
0.70
2.0
1.5
1.0
14 V
12 V
9.6 V
0.5
0.65
0.0
0
1
2
3
4
5
Load Current [Adc]
6
0
1
2
3
4
5
6
Load Current [Adc]
Fig. 2.0V.3: Efficiency vs. load current and input voltage for
Vout = 2.0 V converter mounted vertically with air flowing at
a rate of 200 LFM (1 m/s) and Ta = 25 C.
Fig. 2.0V.4: Power Loss vs. load current and input voltage for
Vout = 2.0 V converter mounted vertically with air flowing at
a rate of 200 LFM (1 m/s) and Ta = 25 C
Fig. 2.0V.5: Turn-on transient for Vout = 2.0 V with
application of Vin at full rated load current (resistive) and 100
μF external capacitance at Vin = 12 V. Top trace: Vin (10
V/div.); Bottom trace: output voltage (1 V/div.); Time scale: 5
ms/div.
Fig. 2.0V.6: Output voltage ripple (20 mV/div.) at full rated
load current into a resistive load with external capacitance
100 μF ceramic and Vin = 12 V for Vout = 2.0 V. Time scale:
1 μs/div.
tech.support@psbel.com
13
YNV12T05 DC-DC Converter
Fig. 2.0V.8: Output voltage response for Vout = 2.0 V to
negative load current step change from 5 A to 2.5 A with
slew rate of -5 A/μs at Vin = 12 V. Top trace: output voltage
(100 mV/div.); Bottom trace: load current (2 A/div.). Co = 100
μF ceramic. Time scale: 20 μs/div.
6
6
5
5
Load Current [Adc]
Load Current [Adc]
Fig. 2.0V.7: Output voltage response for Vout = 2.0 V to
positive load current step change from 2.5 A to 5 A with slew
rate of 5 A/μs at Vin = 12 V. Top trace: output voltage (100
mV/div.); Bottom trace: load current (2 A/div.). Co = 100 μF
ceramic. Time scale: 20 μs/div.
4
3
500 LFM (2.5 m/s)
400 LFM (2.0 m/s)
300 LFM (1.5 m/s)
200 LFM (1.0 m/s)
100 LFM (0.5 m/s)
30 LFM (0.15 m/s)
2
1
4
3
500 LFM (2.5 m/s)
400 LFM (2.0 m/s)
300 LFM (1.5 m/s)
200 LFM (1.0 m/s)
100 LFM (0.5 m/s)
30 LFM (0.15 m/s)
2
1
0
0
20
30
40
50
60
70
80
90
20
30
40
Ambient Temperature [°C]
Fig. 1.8V.1: Available load current vs. ambient temperature
and airflow rates for Vout = 1.8 V converter mounted
vertically with Vin = 12 V, and maximum MOSFET
temperature 120 C.
60
70
80
90
Fig. 1.8V.2: Available load current vs. ambient temperature
and airflow rates for Vout = 1.8 V converter mounted
horizontally with Vin = 12 V, and maximum MOSFET
temperature 120 C.
0.90
3.0
2.5
Power Dissipation [W]
0.85
Efficiency
50
Ambient Temperature [°C]
0.80
0.75
14 V
12 V
9.6 V
0.70
2.0
1.5
1.0
14 V
12 V
9.6 V
0.5
0.65
0.0
0
1
2
3
4
5
6
0
1
Load Current [Adc]
Fig. 1.8V.3: Efficiency vs. load current and input voltage for
Vout = 1.8 V converter mounted vertically with air flowing at
a rate of 200 LFM (1 m/s) and Ta = 25 C
2
3
4
5
6
Load Current [Adc]
Fig. 1.8V.4: Power Loss vs. load current and input voltage for
Vout = 1.8 V converter mounted vertically with air flowing at
a rate of 200 LFM (1 m/s) and Ta = 25 C
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+353 61 225 977
North America
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© 2020 Bel Power Solutions & Protection
BCD.00677_C1
Asia-Pacific
+86 755 298 85888
14
YNV12T05 DC-DC Converter
Fig. 1.8V.6: Output voltage ripple (20 mV/div.) at full rated
load current into a resistive load with external capacitance
100 μF ceramic and Vin = 12 V for Vout = 1.8 V. Time scale:
1 μs/div.
Fig. 1.8V.5: Turn-on transient for Vout = 1.8 V with
application of Vin at full rated load current (resistive) and 100
μF external capacitance at Vin = 12 V. Top trace: Vin (10
V/div.); Bottom trace: output voltage (1 V/div.); Time scale: 5
ms/div.
Fig. 1.8V.8: Output voltage response for Vout = 1.8 V to
negative load current step change from 5 A to 2.5 A with
slew rate of -5 A/μs at Vin = 12 V. Top trace: output voltage
(100 mV/div.); Bottom trace: load current (2 A/div.). Co = 100
μF ceramic. Time scale: 20 μs/div.
6
6
5
5
Load Current [Adc]
Load Current [Adc]
Fig. 1.8V.7: Output voltage response for Vout = 1.8 V to
positive load current step change from 2.5 A to 5 A with slew
rate of 5 A/μs at Vin = 12 V. Top trace: output voltage (100
mV/div.); Bottom trace: load current (2 A/div.). Co = 100 μF
ceramic. Time scale: 20 μs/div.
4
3
500 LFM (2.5 m/s)
400 LFM (2.0 m/s)
300 LFM (1.5 m/s)
200 LFM (1.0 m/s)
100 LFM (0.5 m/s)
30 LFM (0.15 m/s)
2
1
4
3
500 LFM (2.5 m/s)
400 LFM (2.0 m/s)
300 LFM (1.5 m/s)
200 LFM (1.0 m/s)
100 LFM (0.5 m/s)
30 LFM (0.15 m/s)
2
1
0
0
20
30
40
50
60
70
80
Ambient Temperature [°C]
Fig. 1.5V.1: Available load current vs. ambient temperature
and airflow rates for Vout = 1.5 V converter mounted
vertically with Vin = 12 V, and maximum MOSFET
temperature 120 C.
90
20
30
40
50
60
70
80
90
Ambient Temperature [°C]
Fig. 1.5V.2: Available load current vs. ambient temperature
and airflow rates for Vout = 1.5 V converter mounted
horizontally with Vin = 12 V, and maximum MOSFET
temperature 120 C.
tech.support@psbel.com
15
YNV12T05 DC-DC Converter
3.0
0.90
2.5
Power Dissipation [W]
Efficiency
0.85
0.80
0.75
14 V
12 V
9.6 V
0.70
2.0
1.5
1.0
14 V
12 V
9.6 V
0.5
0.0
0.65
0
1
2
3
4
5
6
0
1
3
4
5
6
Load Current [Adc]
Load Current [Adc]
Fig. 1.5V.3: Efficiency vs. load current and input voltage for
Vout = 1.5 V converter mounted vertically with air flowing at
a rate of 200 LFM (1 m/s) and Ta = 25 C.
2
Fig. 1.5V.4: Power Loss vs. load current and input voltage for
Vout = 1.5 V converter mounted vertically with air flowing at
a rate of 200 LFM (1 m/s) and Ta = 25 C
Fig. 1.5V.5: Turn-on transient for Vout = 1.5 V with
application of Vin at full rated load current (resistive) and 100
μF external capacitance at Vin = 12 V. Top trace: Vin (10
V/div.); Bottom trace: output voltage (1 V/div.); Time scale: 5
ms/div.
Fig. 1.5V.6: Output voltage ripple (20 mV/div.) at full rated
load current into a resistive load with external capacitance
100 μF ceramic and Vin = 12 V for Vout = 1.5 V. Time scale:
1 μs/div.
Fig. 1.5V.7: Output voltage response for Vout = 1.5 V to
positive load current step change from 2.5 A to 5 A with slew
rate of 5 A/μs at Vin = 12 V. Top trace: output voltage (100
mV/div.); Bottom trace: load current (2 A/div.). Co = 100 μF
ceramic. Time scale: 20 μs/div.
Fig. 1.5V.8: Output voltage response for Vout = 1.5 V to
negative load current step change from 5 A to 2.5 A with
slew rate of -5 A/μs at Vin = 12 V. Top trace: output voltage
(100 mV/div.); Bottom trace: load current (2 A/div.). Co = 100
μF ceramic. Time scale: 20μs/div
Europe, Middle East
+353 61 225 977
North America
+1 408 785 5200
© 2020 Bel Power Solutions & Protection
BCD.00677_C1
Asia-Pacific
+86 755 298 85888
16
YNV12T05 DC-DC Converter
6
6
5
Load Current [Adc]
Load Current [Adc]
5
4
3
500 LFM (2.5 m/s)
400 LFM (2.0 m/s)
300 LFM (1.5 m/s)
200 LFM (1.0 m/s)
100 LFM (0.5 m/s)
30 LFM (0.15 m/s)
2
1
4
3
500 LFM (2.5 m/s)
400 LFM (2.0 m/s)
300 LFM (1.5 m/s)
200 LFM (1.0 m/s)
100 LFM (0.5 m/s)
30 LFM (0.15 m/s)
2
1
0
0
20
20
30
40
50
60
70
80
Ambient Temperature [°C]
50
60
70
80
90
Fig. 1.2V.2: Available load current vs. ambient temperature
and airflow rates for Vout = 1.2 V converter mounted
horizontally with Vin = 12 V, and maximum MOSFET
temperature 120 C.
0.85
2.5
0.80
2.0
Power Dissipation [W]
Efficiency
40
Ambient Temperature [°C]
Fig. 1.2V.1: Available load current vs. ambient temperature
and airflow rates for Vout = 1.2 V converter mounted
vertically with Vin = 12 V, and maximum MOSFET
temperature 120 C.
0.75
0.70
14 V
12 V
9.6 V
0.65
30
90
1.5
1.0
14 V
12 V
9.6 V
0.5
0.60
0.0
0
1
2
3
4
5
Load Current [Adc]
6
0
1
2
3
4
5
6
Load Current [Adc]
Fig. 1.2V.3: Efficiency vs. load current and input voltage for
Vout = 1.2 V converter mounted vertically with air flowing at
a rate of 200 LFM (1 m/s) and Ta = 25 C.
Fig. 1.2V.4: Power Loss vs. load current and input voltage for
Vout = 1.2 V converter mounted vertically with air flowing at
a rate of 200 LFM (1 m/s) and Ta = 25 C.
Fig. 1.2V.5: Turn-on transient for Vout = 1.2 V with
application of Vin at full rated load current (resistive) and 100
μF external capacitance at Vin = 12 V. Top trace: Vin (10
V/div.); Bottom trace: output voltage (1 V/div.); Time scale: 5
ms/div.
Fig. 1.2V.6: Output voltage ripple (20 mV/div.) at full rated
load current into a resistive load with external capacitance
100 μF ceramic and Vin = 12 V for Vout = 1.2 V. Time scale:
1 μs/div.
tech.support@psbel.com
17
YNV12T05 DC-DC Converter
Fig. 1.2V.8: Output voltage response for Vout = 1.2 V to
negative load current step change from 5 A to 2.5 A with
slew rate of -5 A/μs at Vin = 12 V. Top trace: output voltage
(100 mV/div.); Bottom trace: load current (2 A/div.). Co = 100
μF ceramic. Time scale: 20 μs/div.
6
6
5
5
Load Current [Adc]
Load Current [Adc]
Fig. 1.2V.7: Output voltage response for Vout = 1.2 V to
positive load current step change from 2.5 A to 5 A with slew
rate of 5 A/μs at Vin = 12 V. Top trace: output voltage (100
mV/div.); Bottom trace: load current (2 A/div.). Co = 100 μF
ceramic. Time scale: 20 μs/div.
4
3
500 LFM (2.5 m/s)
400 LFM (2.0 m/s)
300 LFM (1.5 m/s)
200 LFM (1.0 m/s)
100 LFM (0.5 m/s)
30 LFM (0.15 m/s)
2
1
4
3
500 LFM (2.5 m/s)
400 LFM (2.0 m/s)
300 LFM (1.5 m/s)
200 LFM (1.0 m/s)
100 LFM (0.5 m/s)
30 LFM (0.15 m/s)
2
1
0
0
20
30
40
50
60
70
80
90
20
30
40
Ambient Temperature [°C]
60
70
80
90
Ambient Temperature [°C]
Fig. 1.0V.1: Available load current vs. ambient temperature
and airflow rates for Vout = 1.0 V converter mounted
vertically with Vin = 12 V, and maximum MOSFET
temperature 120 C.
Fig. 1.0V.2: Available load current vs. ambient temperature
and airflow rates for Vout = 1.0 V converter mounted
horizontally with Vin = 12 V, and maximum MOSFET
temperature 120 C.
0.85
2.5
0.80
2.0
Power Dissipation [W]
Efficiency
50
0.75
0.70
14 V
12 V
9.6 V
0.65
1.5
1.0
14 V
12 V
9.6 V
0.5
0.60
0.0
0
1
2
3
4
5
6
0
1
Load Current [Adc]
Fig. 1.0V.3: Efficiency vs. load current and input voltage for
Vout = 1.0 V converter mounted vertically with air flowing at
a rate of 200 LFM (1 m/s) and Ta = 25 C.
2
3
4
5
6
Load Current [Adc]
Fig. 1.0V.4: Power Loss vs. load current and input voltage for
Vout = 1.0 V converter mounted vertically with air flowing at
a rate of 200 LFM (1 m/s) and Ta = 25 C.
Europe, Middle East
+353 61 225 977
North America
+1 408 785 5200
© 2020 Bel Power Solutions & Protection
BCD.00677_C1
Asia-Pacific
+86 755 298 85888
18
YNV12T05 DC-DC Converter
Fig. 1.0V.6: Output voltage ripple (20 mV/div.) at full rated
load current into a resistive load with external capacitance
100 μF ceramic and Vin = 12 V for Vout = 1.0 V. Time scale:
1 μs/div.
Fig. 1.0V.5: Turn-on transient for Vout = 1.0 V with
application of Vin at full rated load current (resistive) and 100
μF external capacitance at Vin = 12 V. Top trace: Vin (10
V/div.); Bottom trace: output voltage (1 V/div.); Time scale: 5
ms/div.
Fig. 1.0V.8: Output voltage response for Vout = 1.0 V to
negative load current step change from 5 A to 2.5 A with
slew rate of -5 A/μs at Vin = 12 V. Top trace: output voltage
(100 mV/div.); Bottom trace: load current (2 A/div.). Co = 100
μF ceramic. Time scale: 20μs/div
6
6
5
5
Load Current [Adc]
Load Current [Adc]
Fig. 1.0V.7: Output voltage response for Vout = 1.0 V to
positive load current step change from 2.5 A to 5 A with slew
rate of 5 A/μs at Vin = 12 V. Top trace: output voltage (100
mV/div.); Bottom trace: load current (2 A/div.). Co = 100 μF
ceramic. Time scale: 20 μs/div.
4
3
500 LFM (2.5 m/s)
400 LFM (2.0 m/s)
300 LFM (1.5 m/s)
200 LFM (1.0 m/s)
100 LFM (0.5 m/s)
30 LFM (0.15 m/s)
2
1
4
3
500 LFM (2.5 m/s)
400 LFM (2.0 m/s)
300 LFM (1.5 m/s)
200 LFM (1.0 m/s)
100 LFM (0.5 m/s)
30 LFM (0.15 m/s)
2
1
0
0
20
30
40
50
60
70
80
Ambient Temperature [°C]
Fig. 0.7525V.1: Available load current vs. ambient
temperature and airflow rates for Vout = 0.7525 V converter
mounted vertically with Vin = 12 V, and maximum MOSFET
temperature 120 C.
90
20
30
40
50
60
70
80
90
Ambient Temperature [°C]
Fig. 0.7525V.2: Available load current vs. ambient
temperature and airflow rates for Vout = 0.7525 V converter
mounted horizontally with Vin = 12 V, and maximum
MOSFET temperature 120 C.
tech.support@psbel.com
19
YNV12T05 DC-DC Converter
2.5
0.80
2.0
Power Dissipation [W]
Efficiency
0.75
0.70
0.65
14 V
12 V
9.6 V
0.60
1.5
1.0
14 V
12 V
9.6 V
0.5
0.0
0.55
0
1
2
3
4
5
6
0
1
3
4
5
6
Load Current [Adc]
Load Current [Adc]
Fig. 0.7525V.3: Efficiency vs. load current and input voltage
for Vout = 0.7525 V converter mounted vertically with air
flowing at a rate of 200 LFM (1 m/s) and Ta = 25 C
2
Fig. 0.7525V.4: Power Loss vs. load current and input
voltage for Vout = 0.7525 V converter mounted vertically with
air flowing at a rate of 200 LFM (1 m/s) and Ta = 25 C.
Fig. 0.7525V.5: Turn-on transient for Vout = 0.75250V with
application of Vin at full rated load current (resistive) and 100
μF external capacitance at Vin = 12 V. Top trace: Vin (10
V/div.); Bottom trace: output voltage (1 V/div.); Time scale: 5
ms/div.
Fig. 0.7525V.6: Output voltage ripple (20 mV/div.) at full rated
load current into a resistive load with external capacitance
100 μF ceramic and Vin = 12 V for Vout = 0.7525 V. Time
scale: 1 μs/div.
Fig. 0.7525V.7: Output voltage response for Vout = 0.7525 V
to positive load current step change from 2.5 A to 5 A with
slew rate of 5 A/μs at Vin = 12 V. Top trace: output voltage
(100 mV/div.); Bottom trace: load current (2 A/div.). Co = 100
μF ceramic. Time scale: 20 μs/div.
Fig. 0.7525V.8: Output voltage response for Vout = 0.7525V
to negative load current step change from 5 A to 2.5 A with
slew rate of -5 A/μs at Vin = 12 V. Top trace: output voltage
(100 mV/div.); Bottom trace: load current (2 A/div.). Co = 100
μF ceramic. Time scale: 20 μs/div.
Europe, Middle East
+353 61 225 977
North America
+1 408 785 5200
© 2020 Bel Power Solutions & Protection
BCD.00677_C1
Asia-Pacific
+86 755 298 85888
20
YNV12T05 DC-DC Converter
YNV12T05 Pinout (Through-Hole - SIP)
YNV12T05 Platform Notes
PAD/PIN CONNECTIONS
Pad/Pin #
Function
1
Vout
2
TRIM
3
GND
Product
Series
YNV
Y-Series
4
Vin
5
ON/OFF
•
•
•
•
•
•
Input Voltage
Mounting Scheme
12
T
9.6 – 14 VDC
T Through-Hole (SIP)
Rated Load
Current
05
5A
(0.7525 to 5.5 VDC)
All dimensions are in inches [mm]
Connector Material: Copper
Connector Finish: Gold
Converter Weight: 0.07 oz [2.00 g]
Converter Height: 0.45” Max.
Recommended Through Hole Via/Pad:
Min. 0.043” X 0.064” [1.09 x 1.63]
Environmental
–
No Suffix RoHS lead-solder-exempt compliant
G
RoHS compliant for all six substances
The example above describes P/N YNV12T05: 9.6 – 14 VDC input, through-hole (SIP), 5 A at 0.7525 to 5.5 VDC output, standard
enable logic, and RoHS lead-solder-exemption compliancy. Please consult factory regarding availability of a specific version.
NUCLEAR AND MEDICAL APPLICATIONS - Products are not designed or intended for use as critical components in life support
systems, equipment used in hazardous environments, or nuclear control systems.
TECHNICAL REVISIONS - The appearance of products, including safety agency certifications pictured on labels, may change
depending on the date manufactured. Specifications are subject to change without notice.
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