MCD10207 Rev. 1.0, 24-Jun-10 Page 1 of 27 www.power-one.com
YS12S16 DC-DC Converter Data Sheet
9.6-14 VDC Input; 0.7525-5.5 VDC Programmable @ 16A
Applications
Intermediate Bus Architectures
Telecommunications
Data communications
Distributed Power Architectures
Servers, workstations
Benefits
High efficiency – no heat sink required
Reduces total solution board area
Tape and reel packing
Compatible with pick & place equipment
Minimizes part numbers in inventory
Low cost
The Products: Y-Series
Features
RoHS lead-free solder and lead-solder-exempted
products are available
Delivers up to 16 A (88 W)
Extended input range 9.6 V – 14 V
High efficiency (0.948 at 5 V output)
Surface-mount package
Industry-standard footprint and pinout
Small size and low profile: 1.30” x 0.53” x 0.314”
(33.02 x 13.46 x 7.98 mm)
Weight: 0.23 oz [6.50 g]
Coplanarity less than 0.003”, maximum
Synchronous Buck Converter topology
Start-up into pre-biased output
No minimum load required
Programmable output voltage via external resistor
Operating ambient temperature: -40 °C to 85 °C
Remote output sense
Remote ON/OFF (positive or negative)
Fixed-frequency operation
Auto-reset output overcurrent protection
Auto-reset overtemperature protection
High reliability, MTBF approx. 27.2 Million Hours
calculated per Telcordia TR-332, Method I Case 1
All materials meet UL94, V-0 flammability rating
UL 60950 recognition in U.S. & Canada, and
DEMKO certification per IEC/EN 60950
Description
Power-One’s point-of-load converters are recommended for use with regulated bus converters in an Intermediate
Bus Architecture (IBA). The YS12S16 non-isolated DC-DC converters deliver up to 16 A of output current in an
industry-standard surface-mount package. Operating from a 9.6-14 VDC input, the YS12S16 converters are ideal
choices for Intermediate Bus Architectures where point-of-load power delivery is generally a requirement. They
provide an extremely tight regulated programmable output voltage of 0.7525 V to 5.5 V.
The YS12S16 converters provide exceptional thermal performance, even in high temperature environments with
minimal airflow. This is accomplished through the use of advanced circuitry, packaging, and processing
techniques to achieve a design possessing ultra-high efficiency, excellent thermal management and a very low
body profile.
The low 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.
MCD10207 Rev. 1.0, 24-Jun-10 Page 2 of 27 www.power-one.com
YS12S16 DC-DC Converter Data Sheet
9.6-14 VDC Input; 0.7525-5.5 VDC Programmable @ 16A
Electrical Specifications
Conditions: TA=25ºC, Airflow=300 LFM (1.5 m/s), Vin=12VDC, Vout = 0.7525 - 5.5V, unless otherwise specified.
Parameter Notes Min Typ Max Units
Absolute Maximum Ratings
Input Voltage Continuous -0.3 15 VDC
Operating Ambient Temperature -40 85 °C
Storage Temperature -55 125 °C
Feature Characteristics
Switching Frequency 300 kHz
Output Voltage Trim Range1 By external resistor, See Trim Table 1 0.7525 5.5 VDC
Remote Sense Compensation1 Percent of VOUT(NOM) 0.5 VDC
Turn-On Delay Time2 Full resistive load
With Vin = (Converter Enabled, then
Vin applied) From Vin = Vin(min) to Vo=0.1* Vo(nom) 3 ms
With Enable (Vin = Vin(nom) applied,
then enabled) From enable to Vo= 0.1*Vo(nom) 3 ms
Rise time2 (Full resistive load) From 0.1*Vo(nom) to 0.9*Vo(nom) 4 ms
ON/OFF Control (Positive Logic)3
Converter Off -5 0.8 VDC
Converter On 2.4 Vin VDC
ON/OFF Control (Negative Logic) 3
Converter Off 2.4 Vin VDC
Converter On -5 0.8 VDC
Additional Notes:
1. The output voltage should not exceed 5.5V (taking into account both the programming and remote sense compensation).
2. Note that start-up time is the sum of turn-on delay time and rise time.
3. The converter is on if ON/OFF pin is left open.
MCD10207 Rev. 1.0, 24-Jun-10 Page 3 of 27 www.power-one.com
YS12S16 DC-DC Converter Data Sheet
9.6-14 VDC Input; 0.7525-5.5 VDC Programmable @ 16A
Electrical Specifications (continued)
Conditions: TA=25ºC, Airflow=300 LFM (1.5 m/s), Vin=12VDC, Vout = 0.7525 - 5.5V, unless otherwise specified.
Parameter Notes Min Typ Max Units
Input Characteristics
Operating Input Voltage Range 9.6 12 14 VDC
Input Under Voltage Lockout
Turn-on Threshold 9 VDC
Turn-off Threshold 8.5 VDC
Maximum Input Current 16 ADC Out @ 9.6 VDC In
VOUT = 5.0 VDC 8.9 ADC
VOUT = 3.3 VDC 6 ADC
V
OUT = 2.5 VDC 4.6 ADC
V
OUT = 2.0 VDC 3.8 ADC
V
OUT = 1.8 VDC 3.4 ADC
V
OUT = 1.5 VDC 2.9 ADC
V
OUT = 1.2 VDC 2.4 ADC
V
OUT = 1.0 VDC 2.1 ADC
V
OUT = 0.7525 VDC 1.7 ADC
Input Stand-by Current (Converter disabled) 3 mA
Input No Load Current (Converter enabled) VOUT = 5.0 VDC 83 mA
VOUT = 3.3 VDC 63 mA
VOUT = 2.5 VDC 53 mA
VOUT = 2.0 VDC 47 mA
VOUT = 1.8 VDC 45 mA
VOUT = 1.5 VDC 43 mA
VOUT = 1.2 VDC 41 mA
VOUT = 1.0 VDC 39 mA
VOUT = 0.7525 VDC 35 mA
Input Reflected-Ripple Current -
i
s See Fig. E for setup. (BW = 20 MHz)
VOUT = 5.0 VDC 60 mAP-P
VOUT = 3.3 VDC 43 mAP-P
VOUT = 2.5 VDC 35 mAP-P
VOUT = 2.0 VDC 35 mAP-P
VOUT = 1.8 VDC 35 mAP-P
VOUT = 1.5 VDC 33 mAP-P
VOUT = 1.2 VDC 23 mAP-P
VOUT = 1.0 VDC 21 mAP-P
VOUT = 0.7525 VDC 19 mAP-P
Input Voltage Ripple Rejection 120 Hz 72 dB
MCD10207 Rev. 1.0, 24-Jun-10 Page 4 of 27 www.power-one.com
YS12S16 DC-DC Converter Data Sheet
9.6-14 VDC Input; 0.7525-5.5 VDC Programmable @ 16A
Electrical Specifications (continued)
Conditions: TA=25ºC, Airflow=300 LFM (1.5 m/s), Vin=12VDC, Vout = 0.7525 - 5.5V, unless otherwise specified.
Parameter Notes Min Typ Max Units
Output Characteristics
Output Voltage Set Point (no load) -1.5 Vout +1.5 %Vout
Output Regulation
Over Line Full resistive load 0.5 mV
Over Load From no load to full load 5 mV
Output Voltage Range
(Over all operating input voltage, resistive load
and temperature conditions until end of life )
-2.5
+2.5 %Vout
Output Ripple and Noise - 20MHz bandwidth Over line, load and temperature (Fig. E)
Peak-to-Peak VOUT = 0.7525 VDC 12 19 mVP-P
Peak-to-Peak VOUT = 5.0 VDC 40 65 mVP-P
External Load Capacitance Plus full load (resistive)
Min ESR > 1m 1,000
F
Min ESR > 10 m 5,000
F
Output Current Range 0 16 A
Output Current Limit Inception (IOUT) 25
A
Output Short- Circuit Current , RMS Value Short=10 m, continuous 4 A
Dynamic Response
Load current change from 8A – 16A,
di/dt = 5 A/S Co = 100F ceramic + 470 F POS 140 mV
Settling Time (VOUT < 10% peak deviation) 45 µs
Unloading current change from 16A – 8A,
di/dt = -5 A/S Co = 100 F ceramic + 470 F POS 140 mV
Settling Time (VOUT < 10% peak deviation) 45 µs
Efficiency Full load (16A)
VOUT = 5.0 VDC 94.8 %
V
OUT = 3.3 VDC 92.5 %
V
OUT = 2.5 VDC 90.5 %
V
OUT = 2.0 VDC 89.0 %
V
OUT = 1.8 VDC 88.0 %
V
OUT = 1.5 VDC 86.0 %
V
OUT = 1.2 VDC 84.0 %
V
OUT = 1.0 VDC 80.5 %
V
OUT = 0.7525 VDC 77.0 %
MCD10207 Rev. 1.0, 24-Jun-10 Page 5 of 27 www.power-one.com
YS12S16 DC-DC Converter Data Sheet
9.6-14 VDC Input; 0.7525-5.5 VDC Programmable @ 16A
Operations
Input and Output Impedance
The YS12S16 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
(minimum 47 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 30 F (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 F-
100 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 YS12S16 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 F) are recommended for
improved 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 1)
The ON/OFF pin is used to turn the power 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. The typical connections are
shown in Fig. A.
The positive logic version turns the converter on
when the ON/OFF pin is at a logic high or left open,
and turns the converter off when at a logic low or
shorted to GND.
Rload
Vin
CONTROL
INPUT
Vin
Vin
GND
ON/OFF
SENSE
(Top View)
Converter
TRIM
Vout
R*
R* is for negative logic option only
Y-Series
Fig. A: Circuit configuration for ON/OFF function.
The negative logic version turns the converter on
when the ON/OFF pin is at logic low or left open, and
turns the converter off when the ON/OFF pin is at a
logic high or connected to Vin.
The ON/OFF pin is internally pulled-up to Vin for a
positive logic version, and pulled-down for a negative
logic version. A TTL or CMOS logic gate, open
collector (open drain) transistor can be used to drive
the ON/OFF pin. When using open collector (open
drain) transistor with a negative logic option, add a
pull-up resistor (R*) of 75K 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 V – 5 V
- sourcing up to 0.75 mA when connected to Vin.
Remote Sense (Pin 2)
The remote sense feature of the converter
compensates for voltage drops occurring only
between Vout pin (Pin 4) of the converter and the
load. The SENSE (Pin 2) pin should be connected at
the load or at the point where regulation is required
(see Fig. B). There is no sense feature on the output
GND return pin, where the solid ground plane should
provide low voltage drop.
If remote sensing is not required, the SENSE pin
must be connected to the Vout pin (Pin 4) to ensure
the converter will regulate at the specified output
voltage. If these connections are not made, the
converter will deliver an output voltage that is slightly
higher than the specified value.
MCD10207 Rev. 1.0, 24-Jun-10 Page 6 of 27 www.power-one.com
YS12S16 DC-DC Converter Data Sheet
9.6-14 VDC Input; 0.7525-5.5 VDC Programmable @ 16A
VinVin
Rw
Rw
Rload
Vin
GND
ON/OFF
(Top View)
Converter
TRIM
SENSE
Vout
Y-Series
Fig. B: Remote sense circuit configuration.
Because the sense lead carries minimal current,
large trace on the end-user board are not required.
However, sense trace should be located close to a
ground plane to minimize system noise and insure
optimum performance.
When utilizing the remote sense feature, care must
be taken not to exceed the maximum allowable
output power capability of the converter, equal to the
product of the nominal output voltage and the
allowable output current for the given conditions.
When using remote sense, the output voltage at the
converter can be increased up to 0.5 V above the
nominal rating in order to maintain the required
voltage across the load. Therefore, the designer
must, if necessary, decrease the maximum current
(originally obtained from the derating curves) by the
same percentage to ensure the converter’s actual
output power remains at or below the maximum
allowable output power.
Output Voltage Programming (Pin 3)
The output voltage can be programmed from
0.7525 V to 5.5 V by connecting an external resistor
between TRIM pin (Pin 3) and GND pin (Pin 5); see
Fig. C.
A trim resistor, RTRIM, for a desired output voltage
can be calculated using the following equation:
1
0.7525)- (V
5.10
R
REQ-O
RIMT [k]
where,
TRIMRRequired value of trim resistor [k]
REQOVDesired (trimmed) output voltage [V]
Vin
RTRIM
Rload
Converter
Vin
GND
ON/OFF
(Top View)
TRIM
Vout
SENSE
Y-Series
Fig. C: 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.
Ground pin of the trim resistor should be connected
directly to the converter GND pin (Pin 5) with no
voltage drop in between. Table 1 provides the trim
resistor values for popular output voltages.
Table 1: Trim Resistor Value
V0-REG [V] RTRIM [kΩ] The Closest
Standard Value
[
kΩ
]
0.7525 open
1.0 41.42 41.2
1.2 22.46 22.6
1.5 13.05 13.0
1.8 9.02 9.09
2.0 7.42 7.50
2.5 5.01 4.99
3.3 3.12 3.09
5.0 1.47 1.47
5.5 1.21 1.21
The output voltage can be also programmed by
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:
15
0.7525)- )(VR1(
7.0V REQ-OEXT
CTRL
[V]
where,
CTRLVControl voltage [V]
MCD10207 Rev. 1.0, 24-Jun-10 Page 7 of 27 www.power-one.com
YS12S16 DC-DC Converter Data Sheet
9.6-14 VDC Input; 0.7525-5.5 VDC Programmable @ 16A
EXTRExternal resistor between TRIM pin and
voltage source; the value can be chosen depending
on the required output voltage range [k].
Control voltages with EXTR0 and
EXTR15K are
shown in Table 2.
Table 2: Control Voltage [VDC]
V0-REG [V] VCTRL (REXT = 0) VCTRL(REXT = 15K)
0.7525 0.700 0.700
1.0 0.684 0.436
1.2 0.670 0.223
1.5 0.650 -0.097
1.8 0.630 -0.417
2.0 0.617 -0.631
2.5 0.584 -1.164
3.3 0.530 -2.017
5.0 0.417 -3.831
5.5 0.384 -4.364
Protection Features
Input Undervoltage Lockout
Input undervoltage 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 at least 9.6V (typically 9V)
for the converter to turn on. Once the converter has
been turned on, it will shut off when the input voltage
drops below typically 8.5V.
Output Overcurrent Protection (OCP)
The converter is protected against overcurrent and
short circuit conditions. Upon sensing an over-
current 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 over-
temperature 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
The converter meets North American and
International safety regulatory requirements per
UL60950 and EN60950. 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 SELV 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 15 Amps must be used in
series with the input line.
Characterization
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 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, comprising two-ounce copper, were used to
provide traces for connectivity to the converter.
The lack of metalization 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 tunnel facilities using
Infrared (IR) thermography and thermocouples for
thermometry.
MCD10207 Rev. 1.0, 24-Jun-10 Page 8 of 27 www.power-one.com
YS12S16 DC-DC Converter Data Sheet
9.6-14 VDC Input; 0.7525-5.5 VDC Programmable @ 16A
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. . It is recommended the use of AWG #40
gauge thermocouples to ensure measurement
accuracy. Careful routing of the thermocouple leads
will further minimize measurement error. Refer to
Fig. D for optimum measuring thermocouple
locations.
Fig. D: Location of the thermocouple for thermal testing.
Thermal Derating
Load current vs. ambient temperature and airflow
rates are given in Figs. x.1 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 m/s to 2.5 m/s), and vertical converter
mounting. The airflow during the testing is parallel to
the short axis of the converter, going from pin 1 and
pin 6 to pins 2 – 5.
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 thermo-
graphic image, or
(ii) The maximum current rating of the converter
(16 A)
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. D
should not exceed 120 °C in order to operate inside
the derating curves.
Efficiency
Figure x.2 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.3 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. E.
iS
Vout
Vsource
1F
ceramic
capacitor
1 H
source
inductance
DC/DC
Converter
4x47F
ceramic
capacitor
100F
ceramic
capacitor
CO
CIN
Y-Series
Fig. E: Test setup for measuring input reflected ripple
currents, is and output voltage ripple.
MCD10207 Rev. 1.0, 24-Jun-10 Page 9 of 27 www.power-one.com
YS12S16 DC-DC Converter Data Sheet
9.6-14 VDC Input; 0.7525-5.5 VDC Programmable @ 16A
Ambient Temperature [°C]
20 30 40 50 60 70 80 90
Load Current [Adc]
0
4
8
12
16
20
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)
Fig. 5.0V.1: Available load current vs. ambient temperature
and airflow rates for Vout = 5.0V converter mounted vertically
with Vin = 12V, and maximum MOSFET temperature 120C.
Load Current [Adc]
0 3 6 9 12 15 18
Efficiency
0.75
0.80
0.85
0.90
0.95
1.00
14 V
12 V
9.6 V
Fig. 5.0V.2: Efficiency vs. load current and input voltage
for Vout = 5.0V converter mounted vertically with air
flowing at a rate of 200 LFM (1 m/s) and Ta = 25C.
Load Current [Adc]
0369121518
Power Dissipation [W]
0
1
2
3
4
5
6
14 V
12 V
9.6 V
Fig. 5.0V.3: Power loss vs. load current and input voltage
for Vout = 5.0V converter mounted vertically with air flowing
at a rate of 200 LFM (1 m/s) and Ta = 25C.
MCD10207 Rev. 1.0, 24-Jun-10 Page 10 of 27 www.power-one.com
YS12S16 DC-DC Converter Data Sheet
9.6-14 VDC Input; 0.7525-5.5 VDC Programmable @ 16A
Fig. 5.0V.4: Turn-on transient for Vout = 5.0V with
application of Vin at full rated load current (resistive) and
100F external capacitance at Vin = 12V. Top trace: Vin
(10V/div.); Bottom trace: output voltage (1V/div.); Time
scale: 2ms/div.
Fig. 5.0V.6: Output voltage response for Vout = 5.0V to
positive load current step change from 8A to 16A with slew
rate of 5A/s at Vin = 12V. Top trace: output voltage
(200mV/div.); Bottom trace: load current (5A/div.). Co =
100F ceramic. Time scale: 20s/div.
Fig. 5.0V.5: Output voltage ripple (20mV/div.) at full rated
load current into a resistive load with external capacitance
100F ceramic + 1F ceramic and Vin = 12V for Vout =
5.0V. Time scale: 2s/div.
Fig. 5.0V.7: Output voltage response for Vout = 5.0V to
negative load current step change from 16A to 8A with slew
rate of -5A/s at Vin = 12V. Top trace: output voltage
(200mV/div.); Bottom trace: load current (5A/div.). Co =
100F ceramic. Time scale: 20s/div.
MCD10207 Rev. 1.0, 24-Jun-10 Page 11 of 27 www.power-one.com
YS12S16 DC-DC Converter Data Sheet
9.6-14 VDC Input; 0.7525-5.5 VDC Programmable @ 16A
Ambient Temperature [°C]
20 30 40 50 60 70 80 90
Load Current [Adc]
0
4
8
12
16
20
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)
Fig. 3.3V.1: Available load current vs. ambient temperature
and airflow rates for Vout = 3.3V converter mounted vertically
with Vin = 12V, and maximum MOSFET temperature 120C.
Load Current [Adc]
0369121518
Efficiency
0.75
0.80
0.85
0.90
0.95
1.00
14 V
12 V
9.6 V
Fig. 3.3V.2: Efficiency vs. load current and input voltage
for Vout = 3.3V converter mounted vertically with air
flowing at a rate of 200 LFM (1 m/s) and Ta = 25C.
Load Current [Adc]
0369121518
Power Dissipation [W]
0
1
2
3
4
5
6
14 V
12 V
9.6 V
Fig. 3.3V.3: Power loss vs. load current and input voltage
for Vout = 3.3V converter mounted vertically with air flowing
at a rate of 200 LFM (1 m/s) and Ta = 25C.
MCD10207 Rev. 1.0, 24-Jun-10 Page 12 of 27 www.power-one.com
YS12S16 DC-DC Converter Data Sheet
9.6-14 VDC Input; 0.7525-5.5 VDC Programmable @ 16A
Fig. 3.3V.4: Turn-on transient for Vout = 3.3V with
application of Vin at full rated load current (resistive) and
100F external capacitance at Vin = 12V. Top trace: Vin
(10V/div.); Bottom trace: output voltage (1V/div.); Time
scale: 2ms/div.
Fig. 3.3V.6: Output voltage response for Vout = 3.3V to
positive load current step change from 8A to 16A with slew
rate of 5A/s at Vin = 12V. Top trace: output voltage
(200mV/div.); Bottom trace: load current (5A/div.). Co =
100F ceramic. Time scale: 20s/div.
Fig. 3.3V.5: Output voltage ripple (20mV/div.) at full rated
load current into a resistive load with external capacitance
100F ceramic + 1F ceramic and Vin = 12V for Vout =
3.3V. Time scale: 2s/div.
Fig. 3.3V.7: Output voltage response for Vout = 3.3V to
negative load current step change from 16A to 8A with slew
rate of -5A/s at Vin = 12V. Top trace: output voltage
(200mV/div.); Bottom trace: load current (5A/div.). Co =
100F ceramic. Time scale: 20s/div.
MCD10207 Rev. 1.0, 24-Jun-10 Page 13 of 27 www.power-one.com
YS12S16 DC-DC Converter Data Sheet
9.6-14 VDC Input; 0.7525-5.5 VDC Programmable @ 16A
Ambient Temperature [°C]
20 30 40 50 60 70 80 90
Load Current [Adc]
0
4
8
12
16
20
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)
Fig. 2.5V.1: Available load current vs. ambient temperature
and airflow rates for Vout = 2.5V converter mounted vertically
with Vin = 12V, and maximum MOSFET temperature 120C.
Load Current [Adc]
0 3 6 9 12 15 18
Efficiency
0.75
0.80
0.85
0.90
0.95
1.00
14 V
12 V
9.6 V
Fig. 2.5V.2: Efficiency vs. load current and input voltage
for Vout = 2.5V converter mounted vertically with air
flowing at a rate of 200 LFM (1 m/s) and Ta = 25C.
Load Current [Adc]
0369121518
Power Dissipation [W]
0
1
2
3
4
5
6
14 V
12 V
9.6 V
Fig. 2.5V.3: Power loss vs. load current and input voltage
for Vout = 2.5V converter mounted vertically with air flowing
at a rate of 200 LFM (1 m/s) and Ta = 25C.
MCD10207 Rev. 1.0, 24-Jun-10 Page 14 of 27 www.power-one.com
YS12S16 DC-DC Converter Data Sheet
9.6-14 VDC Input; 0.7525-5.5 VDC Programmable @ 16A
Fig. 2.5V.4: Turn-on transient for Vout = 2.5V with
application of Vin at full rated load current (resistive) and
100F external capacitance at Vin = 12V. Top trace: Vin
(10V/div.); Bottom trace: output voltage (1V/div.); Time
scale: 2ms/div.
Fig. 2.5V.6: Output voltage response for Vout = 2.5V to
positive load current step change from 8A to 16A with slew
rate of 5A/s at Vin = 12V. Top trace: output voltage
(200mV/div.); Bottom trace: load current (5A/div.). Co =
100F ceramic. Time scale: 20s/div.
Fig. 2.5V.5: Output voltage ripple (20mV/div.) at full rated
load current into a resistive load with external capacitance
100F ceramic + 1F ceramic and Vin = 12V for Vout =
2.5V. Time scale: 2s/div.
Fig. 2.5V.7: Output voltage response for Vout = 2.5V to
negative load current step change from 16A to 8A with slew
rate of -5A/s at Vin = 12V. Top trace: output voltage
(200mV/div.); Bottom trace: load current (5A/div.). Co =
100F ceramic. Time scale: 20s/div.
MCD10207 Rev. 1.0, 24-Jun-10 Page 15 of 27 www.power-one.com
YS12S16 DC-DC Converter Data Sheet
9.6-14 VDC Input; 0.7525-5.5 VDC Programmable @ 16A
Ambient Temperature [°C]
20 30 40 50 60 70 80 90
Load Current [Adc]
0
4
8
12
16
20
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)
Fig. 2.0V.1: Available load current vs. ambient temperature
and airflow rates for Vout = 2.0V converter mounted vertically
with Vin = 12V, and maximum MOSFET temperature 120C.
Load Current [Adc]
0 3 6 9 12 15 18
Efficiency
0.75
0.80
0.85
0.90
0.95
1.00
14 V
12 V
9.6 V
Fig. 2.0V.2: Efficiency vs. load current and input voltage
for Vout = 2.0V converter mounted vertically with air
flowing at a rate of 200 LFM (1 m/s) and Ta = 25C.
Load Current [Adc]
0369121518
Power Dissipation [W]
0
1
2
3
4
5
6
14 V
12 V
9.6 V
Fig. 2.0V.3: Power loss vs. load current and input voltage
for Vout = 2.0V converter mounted vertically with air flowing
at a rate of 200 LFM (1 m/s) and Ta = 25C.
MCD10207 Rev. 1.0, 24-Jun-10 Page 16 of 27 www.power-one.com
YS12S16 DC-DC Converter Data Sheet
9.6-14 VDC Input; 0.7525-5.5 VDC Programmable @ 16A
Fig. 2.0V.4: Turn-on transient for Vout = 2.0V with
application of Vin at full rated load current (resistive) and
100F external capacitance at Vin = 12V. Top trace: Vin
(10V/div.); Bottom trace: output voltage (1V/div.); Time
scale: 2ms/div.
Fig. 2.0V.6: Output voltage response for Vout = 2.0V to
positive load current step change from 8A to 16A with slew
rate of 5A/s at Vin = 12V. Top trace: output voltage
(200mV/div.); Bottom trace: load current (5A/div.). Co =
100F ceramic. Time scale: 20s/div.
Fig. 2.0V.5: Output voltage ripple (20mV/div.) at full rated
load current into a resistive load with external capacitance
100F ceramic + 1F ceramic and Vin = 12V for Vout =
2.0V. Time scale: 2s/div.
Fig. 2.0V.7: Output voltage response for Vout = 2.0V to
negative load current step change from 16A to 8A with slew
rate of -5A/s at Vin = 12V. Top trace: output voltage
(200mV/div.); Bottom trace: load current (5A/div.). Co =
100F ceramic. Time scale: 20s/div.
MCD10207 Rev. 1.0, 24-Jun-10 Page 17 of 27 www.power-one.com
YS12S16 DC-DC Converter Data Sheet
9.6-14 VDC Input; 0.7525-5.5 VDC Programmable @ 16A
Ambient Temperature [°C]
20 30 40 50 60 70 80 90
Load Current [Adc]
0
4
8
12
16
20
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)
Fig. 1.8V.1: Available load current vs. ambient temperature
and airflow rates for Vout = 1.8V converter mounted vertically
with Vin = 12V, and maximum MOSFET temperature 120C.
Load Current [Adc]
0369121518
Efficiency
0.75
0.80
0.85
0.90
0.95
1.00
14 V
12 V
9.6 V
Fig. 1.8V.2: Efficiency vs. load current and input voltage
for Vout = 1.8V converter mounted vertically with air
flowing at a rate of 200 LFM (1 m/s) and Ta = 25C.
Load Current [Adc]
0369121518
Power Dissipation [W]
0
1
2
3
4
5
6
14 V
12 V
9.6 V
Fig. 1.8V.3: Power loss vs. load current and input voltage
for Vout = 1.8V converter mounted vertically with air flowing
at a rate of 200 LFM (1 m/s) and Ta = 25C.
MCD10207 Rev. 1.0, 24-Jun-10 Page 18 of 27 www.power-one.com
YS12S16 DC-DC Converter Data Sheet
9.6-14 VDC Input; 0.7525-5.5 VDC Programmable @ 16A
Fig. 1.8V.4: Turn-on transient for Vout = 1.8V with
application of Vin at full rated load current (resistive) and
100F external capacitance at Vin = 12V. Top trace: Vin
(10V/div.); Bottom trace: output voltage (1V/div.); Time
scale: 2ms/div.
Fig. 1.8V.6: Output voltage response for Vout = 1.8V to
positive load current step change from 8A to 16A with slew
rate of 5A/s at Vin = 12V. Top trace: output voltage
(200mV/div.); Bottom trace: load current (5A/div.). Co =
100F ceramic. Time scale: 20s/div.
Fig. 1.8V.5: Output voltage ripple (20mV/div.) at full rated
load current into a resistive load with external capacitance
100F ceramic + 1F ceramic and Vin = 12V for Vout =
1.8V. Time scale: 2s/div.
Fig. 1.8V.7: Output voltage response for Vout = 1.8V to
negative load current step change from 16A to 8A with slew
rate of -5A/s at Vin = 12V. Top trace: output voltage
(200mV/div.); Bottom trace: load current (5A/div.). Co =
100F ceramic. Time scale: 20s/div.
MCD10207 Rev. 1.0, 24-Jun-10 Page 19 of 27 www.power-one.com
YS12S16 DC-DC Converter Data Sheet
9.6-14 VDC Input; 0.7525-5.5 VDC Programmable @ 16A
Ambient Temperature [°C]
20 30 40 50 60 70 80 90
Load Current [Adc]
0
4
8
12
16
20
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)
Fig. 1.5V.1: Available load current vs. ambient temperature
and airflow rates for Vout = 1.5V converter mounted vertically
with Vin = 12V, air flowing and maximum MOSFET
temperature 120C.
Load Current [Adc]
0 3 6 9 12 15 18
Efficiency
0.70
0.75
0.80
0.85
0.90
0.95
14 V
12 V
9.6 V
Fig. 1.5V.2: Efficiency vs. load current and input voltage
for Vout = 1.5V converter mounted vertically with air
flowing at a rate of 200 LFM (1 m/s) and Ta = 25C.
Load Current [Adc]
0369121518
Power Dissipation [W]
0
1
2
3
4
5
14 V
12 V
9.6 V
Fig. 1.5V.3: Power loss vs. load current and input voltage
for Vout = 1.5V converter mounted vertically with air flowing
at a rate of 200 LFM (1 m/s) and Ta = 25C.
MCD10207 Rev. 1.0, 24-Jun-10 Page 20 of 27 www.power-one.com
YS12S16 DC-DC Converter Data Sheet
9.6-14 VDC Input; 0.7525-5.5 VDC Programmable @ 16A
Fig. 1.5V.4: Turn-on transient for Vout = 1.5V with
application of Vin at full rated load current (resistive) and
100F external capacitance at Vin = 12V. Top trace: Vin
(10V/div.); Bottom trace: output voltage (1V/div.); Time
scale: 2ms/div.
Fig. 1.5V.6: Output voltage response for Vout = 1.5V to
positive load current step change from 8A to 16A with slew
rate of 5A/s at Vin = 12V. Top trace: output voltage
(200mV/div.); Bottom trace: load current (5A/div.). Co =
100F ceramic. Time scale: 20s/div.
Fig. 1.5V.5: Output voltage ripple (20mV/div.) at full rated
load current into a resistive load with external capacitance
100F ceramic + 1F ceramic and Vin = 12V for Vout =
1.5V. Time scale: 2s/div.
Fig. 1.5V.7: Output voltage response for Vout = 1.5V to
negative load current step change from 16A to 8A with slew
rate of -5A/s at Vin = 12V. Top trace: output voltage
(200mV/div.); Bottom trace: load current (5A/div.). Co =
100F ceramic. Time scale: 20s/div.
MCD10207 Rev. 1.0, 24-Jun-10 Page 21 of 27 www.power-one.com
YS12S16 DC-DC Converter Data Sheet
9.6-14 VDC Input; 0.7525-5.5 VDC Programmable @ 16A
Ambient Temperature [°C]
20 30 40 50 60 70 80 90
Load Current [Adc]
0
4
8
12
16
20
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)
Fig. 1.2V.1: Available load current vs. ambient temperature
and airflow rates for Vout = 1.2V converter mounted vertically
with Vin = 12V, and maximum MOSFET temperature 120C.
Load Current [Adc]
0 3 6 9 12 15 18
Efficiency
0.70
0.75
0.80
0.85
0.90
0.95
14 V
12 V
9.6 V
Fig. 1.2V.2: Efficiency vs. load current and input voltage
for Vout = 1.2V converter mounted vertically with air
flowing at a rate of 200 LFM (1 m/s) and Ta = 25C.
Load Current [Adc]
0369121518
Power Dissipation [W]
0
1
2
3
4
5
14 V
12 V
9.6 V
Fig. 1.2V.3: Power loss vs. load current and input voltage
for Vout = 1.2V converter mounted vertically with air flowing
at a rate of 200 LFM (1 m/s) and Ta = 25C.
MCD10207 Rev. 1.0, 24-Jun-10 Page 22 of 27 www.power-one.com
YS12S16 DC-DC Converter Data Sheet
9.6-14 VDC Input; 0.7525-5.5 VDC Programmable @ 16A
Fig. 1.2V.4: Turn-on transient for Vout = 1.2V with
application of Vin at full rated load current (resistive) and
100F external capacitance at Vin = 12V. Top trace: Vin
(10V/div.); Bottom trace: output voltage (1V/div.); Time
scale: 2ms/div.
Fig. 1.2V.6: Output voltage response for Vout = 1.2V to
positive load current step change from 8A to 16A with slew
rate of 5A/s at Vin = 12V. Top trace: output voltage
(200mV/div.); Bottom trace: load current (5A/div.). Co =
100F ceramic. Time scale: 20s/div.
Fig. 1.2V.5: Output voltage ripple (20mV/div.) at full rated
load current into a resistive load with external capacitance
100F ceramic + 1F ceramic and Vin = 12V for Vout =
1.2V. Time scale: 2s/div.
Fig. 1.2V.7: Output voltage response for Vout = 1.2V to
negative load current step change from 16A to 8A with slew
rate of -5A/s at Vin = 12V. Top trace: output voltage
(200mV/div.); Bottom trace: load current (5A/div.). Co =
100F ceramic. Time scale: 20s/div.
MCD10207 Rev. 1.0, 24-Jun-10 Page 23 of 27 www.power-one.com
YS12S16 DC-DC Converter Data Sheet
9.6-14 VDC Input; 0.7525-5.5 VDC Programmable @ 16A
Ambient Temperature [°C]
20 30 40 50 60 70 80 90
Load Current [Adc]
0
4
8
12
16
20
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)
Fig. 1.0V.1: Available load current vs. ambient temperature
and airflow rates for Vout = 1.0V converter mounted vertically
with Vin = 12V, and maximum MOSFET temperature 120C.
Load Current [Adc]
0 3 6 9 12 15 18
Efficiency
0.60
0.65
0.70
0.75
0.80
0.85
0.90
14 V
12 V
9.6 V
Fig. 1.0V.2: Efficiency vs. load current and input voltage
for Vout = 1.0V converter mounted vertically with air
flowing at a rate of 200 LFM (1 m/s) and Ta = 25C.
Load Current [Adc]
0369121518
Power Dissipation [W]
0
1
2
3
4
5
14 V
12 V
9.6 V
Fig. 1.0V.3: Power loss vs. load current and input voltage
for Vout = 1.0V converter mounted vertically with air flowing
at a rate of 200 LFM (1 m/s) and Ta = 25C.
MCD10207 Rev. 1.0, 24-Jun-10 Page 24 of 27 www.power-one.com
YS12S16 DC-DC Converter Data Sheet
9.6-14 VDC Input; 0.7525-5.5 VDC Programmable @ 16A
Fig. 1.0V.4: Turn-on transient for Vout = 1.0V with
application of Vin at full rated load current (resistive) and
100F external capacitance at Vin = 12V. Top trace: Vin
(10V/div.); Bottom trace: output voltage (1V/div.); Time
scale: 2ms/div.
Fig. 1.0V.6: Output voltage response for Vout = 1.0V to
positive load current step change from 8A to 16A with slew
rate of 5A/s at Vin = 12V. Top trace: output voltage
(200mV/div.); Bottom trace: load current (5A/div.). Co =
100F ceramic. Time scale: 20s/div.
Fig. 1.0V.5: Output voltage ripple (20mV/div.) at full rated
load current into a resistive load with external capacitance
100F ceramic + 1F ceramic and Vin = 12V for Vout =
1.0V. Time scale: 2s/div.
Fig. 1.0V.7: Output voltage response for Vout = 1.0V to
negative load current step change from 16A to 8A with slew
rate of -5A/s at Vin = 12V. Top trace: output voltage
(200mV/div.); Bottom trace: load current (5A/div.). Co =
100F ceramic. Time scale: 20s/div.
MCD10207 Rev. 1.0, 24-Jun-10 Page 25 of 27 www.power-one.com
YS12S16 DC-DC Converter Data Sheet
9.6-14 VDC Input; 0.7525-5.5 VDC Programmable @ 16A
Ambient Temperature [°C]
20 30 40 50 60 70 80 90
Load Current [Adc]
0
4
8
12
16
20
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)
Fig. 0.7525V.1: Available load current vs. ambient
temperature and airflow rates for Vout = 1.0V converter
mounted vertically with Vin = 12V, and maximum MOSFET
temperature 120C.
Load Current [Adc]
0 3 6 9 12 15 18
Efficiency
0.65
0.70
0.75
0.80
0.85
0.90
14 V
12 V
9.6 V
Fig. 0.7525V.2: Efficiency vs. load current and input
voltage for Vout = 0.7525V converter mounted vertically
with air flowing at a rate of 200 LFM (1 m/s) and Ta =
25C.
Load Current [Adc]
0369121518
Power Dissipation [W]
0
1
2
3
4
5
14 V
12 V
9.6 V
Fig. 0.7525V.3: Power loss vs. load current and input
voltage for Vout = 0.7525V converter mounted vertically
with air flowing at a rate of 200 LFM (1 m/s) and Ta = 25C.
MCD10207 Rev. 1.0, 24-Jun-10 Page 26 of 27 www.power-one.com
YS12S16 DC-DC Converter Data Sheet
9.6-14 VDC Input; 0.7525-5.5 VDC Programmable @ 16A
Fig. 0.7525V.4: Turn-on transient for Vout = 0.7525V with
application of Vin at full rated load current (resistive) and
100F external capacitance at Vin = 12V. Top trace: Vin
(10V/div.); Bottom trace: output voltage (1V/div.); Time
scale: 2ms/div.
Fig. 0.7525V.6: Output voltage response for Vout =
0.7525V to positive load current step change from 8A to
16A with slew rate of 5A/s at Vin = 12V. Top trace: output
voltage (200mV/div.); Bottom trace: load current (5A/div.).
Co = 100F ceramic. Time scale: 20s/div.
Fig. 0.7525V.5: Output voltage ripple (20mV/div.) at full
rated load current into a resistive load with external
capacitance 100F ceramic + 1F ceramic and Vin = 12V
for Vout = 0.7525V. Time scale: 2s/div.
Fig. 0.7525V.7: Output voltage response for Vout =
0.7525V to negative load current step change from 16A to
8A with slew rate of -5A/s at Vin = 12V. Top trace: output
voltage (200mV/div.); Bottom trace: load current (5A/div.).
Co = 100F ceramic. Time scale: 20s/div.
MCD10207 Rev. 1.0, 24-Jun-10 Page 27 of 27 www.power-one.com
YS12S16 DC-DC Converter Data Sheet
9.6-14 VDC Input; 0.7525-5.5 VDC Programmable @ 16A
Physical Information
TOP VIEW
(*) PIN # 1 ROTATED 90°
6
SIDE VIEW
345
1(*)
2
YS12S Pinout (Surface Mount)
Converter Part Numbering Scheme
Product
Series
Input
Voltage
Mounting
Scheme
Rated Load
Current Enable Logic RoHS
Compatible
YS 12 S 16 – 0 G
Y-Series 9.6V – 14V
S Surface
Mount
16A
(0.7525V to 5.5V)
0 Standard
(Positive Logic)
D Opposite of
Standard
(Negative Logic)
Not Populated
RoHS lead solder
exemption compliant
G RoHS
compliant for all six
substances
The example above describes P/N YS12S16-0G: 9.6V – 14V input, surface mount, 16A at 0.7525V to 5.5V output, standard enable
logic, and RoHS compliant for all six substances. Please consult factory regarding availability of a specific version.
NUCLEAR AND MEDICAL APPLICATIONS - Power-One products are not designed, intended for use in, or authorized for use as critical
components in life support systems, equipment used in hazardous environments, or nuclear control systems without the express written
consent of the respective divisional president of Power-One, Inc.
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.
Pad/Pin Connections
Pad/Pin # Function
1 ON/OFF
2 SENSE
3 TRIM
4 Vout
5 GND
6 Vin
YS12S Platform Notes
All dimensions are in inches [mm]
Connector Material: Copper
Connector Finish: Gold over Nickel
Converter Weight: 0.23 oz [6.50 g]
Converter Height: 0.327” Max., 0.301” Min.
Recommended Surface-Mount Pads:
Min. 0.080” X 0.112” [2.03 x 2.84]
