JUL 20, 2006 revised to OCT 18, 2006 Page 1 of 27 www.power-one.com
YS12S10 DC-DC Converter Data Sheet
9.6-14 VDC Input; 0.7525-5.5 VDC Programmable @ 10 A
Applications
• Intermediate Bus Architectures
• Telecommunications
• Data communications
• Distributed Power Architectures
• Servers, workstations
Benefits
• High efficiency– no heat sink required
(0.95 at 5 VDC output)
• 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 10 A (55 W)
• Extended input range 9.6 to 14 VDC
• No derating up to 85 °C (70 °C for 5 VDC)
• 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: 0.22 oz [6.12 g]
• Co-planarity < 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
• UL60950 recognition in U.S. & Canada, and
DEMKO certification per IEC/EN60950
Description
The YS12S10 non-isolated DC-DC converter delivers up to 10 A of output current in an industry-standard
surface-mount package. Operating from a 9.6 to 14 VDC input, the YS12S10 converters are ideal choices for
Intermediate Bus Architectures where Point-of-Load (POL) power delivery is generally a requirement. The
converters provide an extremely tight regulated, programmable output voltage of 0.7525 to 5.5 VDC.
The YS12S10 converters provide exceptional thermal performance, even in high temperature environments with
minimal airflow. No derating is required up to 85 °C (up to 70 °C for 5 VDC output), even without airflow at natural
convection. This performance 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.
JUL 20, 2006 revised to OCT 18, 2006 Page 2 of 27 www.power-one.com
YS12S10 DC-DC Converter Data Sheet
9.6-14 VDC Input; 0.7525-5.5 VDC Programmable @ 10 A
Electrical Specifications
Conditions: TA = 25 ºC, Airflow = 300 LFM (1.5 m/s), Vin = 12 VDC, Vout = 0.7525 - 5.5 VDC, 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 0.5 VDC
Turn-On Delay Time 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 5.5 VDC.
2 Note that the startup time is the sum of turn-on delay time and rise time.
3 The converter is ON if the ON/OFF pin is left open.
JUL 20, 2006 revised to OCT 18, 2006 Page 3 of 27 www.power-one.com
YS12S10 DC-DC Converter Data Sheet
9.6-14 VDC Input; 0.7525-5.5 VDC Programmable @ 10 A
Electrical Specifications (continued)
Conditions: TA = 25 ºC, Airflow = 300 LFM (1.5 m/s), Vin = 12 VDC, Vout = 0.7525 - 5.5 VDC, 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 9.0 VDC
Turn-off Threshold 8.5 VDC
Maximum Input Current 10 ADC Out @ 9.6 VDC In
VOUT = 5.0 VDC 5.5 ADC
VOUT = 3.3 VDC 3.7 ADC
V
OUT = 2.5 VDC 2.8 ADC
V
OUT = 2.0 VDC 2.3 ADC
V
OUT = 1.8 VDC 2.1 ADC
V
OUT = 1.5 VDC 1.8 ADC
V
OUT = 1.2 VDC 1.5 ADC
V
OUT = 1.0 VDC 1.3 ADC
V
OUT = 0.7525 VDC 1.1 ADC
Input Stand-by Current (Converter disabled) 5 mA
Input No Load Current (Converter enabled) VOUT = 5.0 VDC 76 mA
VOUT = 3.3 VDC 60 mA
VOUT = 2.5 VDC 45 mA
VOUT = 2.0 VDC 41 mA
VOUT = 1.8 VDC 38 mA
VOUT = 1.5 VDC 35 mA
VOUT = 1.2 VDC 33 mA
VOUT = 1.0 VDC 30 mA
VOUT = 0.7525 VDC 28 mA
Input Reflected-Ripple Current -
i
s See Fig. D for setup. (BW = 20 MHz)
VOUT = 5.0 VDC 36 mAP-P
VOUT = 3.3 VDC 34 mAP-P
VOUT = 2.5 VDC 32 mAP-P
VOUT = 2.0 VDC 31 mAP-P
VOUT = 1.8 VDC 30 mAP-P
VOUT = 1.5 VDC 29 mAP-P
VOUT = 1.2 VDC 26 mAP-P
VOUT = 1.0 VDC 23 mAP-P
V
OUT = 0.7525 VDC 20 mAP-P
Input Voltage Ripple Rejection 120 Hz 72 dB
JUL 20, 2006 revised to OCT 18, 2006 Page 4 of 27 www.power-one.com
YS12S10 DC-DC Converter Data Sheet
9.6-14 VDC Input; 0.7525-5.5 VDC Programmable @ 10 A
Electrical Specifications (continued)
Conditions: TA = 25 ºC, Airflow = 300 LFM (1.5 m/s), Vin = 12 VDC, Vout = 0.7525 - 5.5 VDC, unless otherwise specified.
Parameter Notes Min Typ Max Units
Output Characteristics
Output Voltage Set Point (no load) -1.5 Vout +1.5 %Vout
Output Regulation4
Over Line Full resistive load 1 2 mV
Over Load From no load to full load 5 12 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 – 20 MHz bandwidth Over line, load and temperature (Fig. D)
Peak-to-Peak VOUT = 1.0 VDC 10 20 mVP-P
Peak-to-Peak VOUT = 5.0 VDC 25 40 mVP-P
External Load Capacitance Plus full load (resistive)
Min ESR > 1mΩ 1,000
μF
Min ESR > 10 mΩ 5,000
μF
Output Current Range 0 10 ADC
Output Current Limit Inception (IOUT) 20
ADC
Output Short-Circuit Current Short = 10 mΩ, continuous 3 Arms
Dynamic Response
Iout step from 5 A to 10 A with di/dt = 5 A/μs Co = 10 μF ceramic. + 1 μF ceramic 150/(1805) mV
Settling Time (VOUT < 10% peak deviation) 30 µs
Iout step from 10 A to 5 A with di/dt = -5 A/μs Co = 10 μF ceramic + 1 μF ceramic 150/(1805) mV
Settling Time (VOUT < 10% peak deviation) 30 µs
Iout step from 5 A to 10 with di/dt = 5 A/μs Co = 330 μF polymer capacitors 100/(1205) mV
Settling Time (VOUT < 10% peak deviation) 55 µs
Iout step from 10 A to 5 A with di/dt = -5 A/μs Co = 330 μF polymer capacitors 100/(1205) mV
Settling Time (VOUT < 10% peak deviation) 55 µs
Efficiency Full load (10 A)
VOUT = 5.0 VDC 95.0 %
V
OUT = 3.3 VDC 94.0 %
V
OUT = 2.5 VDC 93.0 %
V
OUT = 2.0 VDC 91.5 %
V
OUT = 1.8 VDC 90.5 %
V
OUT = 1.5 VDC 89.5 %
V
OUT = 1.2 VDC 87.5 %
V
OUT = 1.0 VDC 86.0 %
V
OUT = 0.7525 VDC 84.0 %
Additional Notes:
4 Trim resistor connected across the GND and TRIM pins of the converter.
5 For VOUT = 5.0 VDC only. See the waveforms section for dynamic response and settling time for different output voltages.
JUL 20, 2006 revised to OCT 18, 2006 Page 5 of 27 www.power-one.com
YS12S10 DC-DC Converter Data Sheet
9.6-14 VDC Input; 0.7525-5.5 VDC Programmable @ 10 A
Operations
Input and Output Impedance
The YS12S10 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 μF) 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 YS12S10 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 your load to
the output pins of the converter. This is required to
maintain good load regulation since the converter
does not have a SENSE pin for compensating
voltage drops associated with the power distribution
system on your PCB.
ON/OFF (Pin 1)
The ON/OFF pin (Pin 1) 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,
with both are referenced to GND (Pin 5). 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.
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.
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 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 75 kΩ 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.
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 a low voltage drop.
VinVin
Rw
Rw
Rload
Vin
GND
ON/OFF
(Top View)
Converter
TRIM
SENSE
Vout
Y-Series
Fig. B: Circuit configuration for ON/OFF function.
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.
JUL 20, 2006 revised to OCT 18, 2006 Page 6 of 27 www.power-one.com
YS12S10 DC-DC Converter Data Sheet
9.6-14 VDC Input; 0.7525-5.5 VDC Programmable @ 10 A
Because the sense lead carries minimal current,
large traces on the end-user board are not required.
However, sense trace should be located close to a
ground plane to minimize system noise and ensure
the optimum performance.
When utilizing the remote sense feature, care must
be taken not to exceed the maximum allowable
output power capability of the converter which is
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 to 5.5 V by connecting an external resistor
between TRIM pin (Pin 3) and GND pin (Pin 5); see
Fig. C. Note that when trim resistor is not connected,
output voltage of the converter is 0.7525 V.
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 −= [kΩ]
where,
=TRIMRRequired value of trim resistor [kΩ]
=−REQOVDesired (trimmed) output voltage [V]
Rload
Vin
RT-INCR
Converter
Vin
GND
ON/OFF
SENSE
(Top View)
TRIM
Vout
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.
The 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 also be 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]
=
EXTRExternal resistor between TRIM pin and
voltage source; the kΩ value can be chosen
depending on the required output voltage range.
Control voltages with =EXTR0 and
=
EXTR15 kΩ are
shown in Table 2.
Table 2: Control Voltage [VDC]
V0-REG [V] VCTRL (REXT = 0) VCTRL(REXT = 15 kΩ)
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
JUL 20, 2006 revised to OCT 18, 2006 Page 7 of 27 www.power-one.com
YS12S10 DC-DC Converter Data Sheet
9.6-14 VDC Input; 0.7525-5.5 VDC Programmable @ 10 A
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 typically 9.0 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 8.5 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
overload 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
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 and horizontal
mountings, efficiency, startup 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 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 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. D for the
optimum measuring thermocouple location.
Fig. D: Location of the thermocouple for thermal testing.
JUL 20, 2006 revised to OCT 18, 2006 Page 8 of 27 www.power-one.com
YS12S10 DC-DC Converter Data Sheet
9.6-14 VDC Input; 0.7525-5.5 VDC Programmable @ 10 A
Thermal Derating
Load current vs. ambient temperature and airflow
rates are given in Figs. x.1 to x.2 for maximum
temperature of 110 °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 and horizontal converter mountings. The
airflow during the testing is parallel to the long 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 (110 °C) as indicated by the
thermographic image, or
(ii) The maximum current rating of the converter
(10 A)
During normal operation, derating curves with
maximum FET temperature less than or equal to
110 °C should not be exceeded. Temperature on the
PCB at the thermocouple location shown in Fig. D
should not exceed 110 °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 μF 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
1μF
ceramic
capacitor
1 μH
source
inductance
DC-DC
Converter
4x47μF
ceramic
capacitor
100μF
ceramic
capacitor
CO
CIN
Y-Series
Fig. E: Test setup for measuring input reflected-ripple currents, is
and output voltage ripple.
JUL 20, 2006 revised to OCT 18, 2006 Page 9 of 27 www.power-one.com
YS12S10 DC-DC Converter Data Sheet
9.6-14 VDC Input; 0.7525-5.5 VDC Programmable @ 10 A
Ambient Temperature [°C]
20 30 40 50 60 70 80 90
Load Current [Adc]
0
2
4
6
8
10
12
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 = 5.0 V converter mounted vertically with
Vin = 12 V, and maximum MOSFET temperature ≤ 110 °C.
Load Current [Adc]
024681012
Efficiency
0.75
0.80
0.85
0.90
0.95
1.00
14 V
12 V
9.6 V
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.
Ambient Temperature [°C]
20 30 40 50 60 70 80 90
Load Current [Adc]
0
2
4
6
8
10
12
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.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 ≤ 110 °C.
Load Current [Adc]
024681012
Power Dissipation [W]
0.0
0.5
1.0
1.5
2.0
2.5
3.0
14 V
12 V
9.6 V
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.
JUL 20, 2006 revised to OCT 18, 2006 Page 10 of 27 www.power-one.com
YS12S10 DC-DC Converter Data Sheet
9.6-14 VDC Input; 0.7525-5.5 VDC Programmable @ 10 A
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: 2 ms/div.
Fig. 5.0V.7: Output voltage response for Vout = 5.0 V to positive
load current step change from 5 A to 10 A with slew rate of 5 A/μs
at Vin = 12 V. Top trace: output voltage
(100 mV/div.); Bottom trace: load current (5 A/div.). Co =
100 μF ceramic. Time scale: 20 μs/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 + 1 μF ceramic, and Vin = 12 V for Vout =
5.0 V. Time scale: 2 μs/div.
Fig. 5.0V.8: Output voltage response for Vout = 5.0 V to negative
load current step change from 10 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 (5 A/div.). Co =
100 μF ceramic. Time scale: 20 μs/div.
JUL 20, 2006 revised to OCT 18, 2006 Page 11 of 27 www.power-one.com
YS12S10 DC-DC Converter Data Sheet
9.6-14 VDC Input; 0.7525-5.5 VDC Programmable @ 10 A
Ambient Temperature [°C]
20 30 40 50 60 70 80 90
Load Current [Adc]
0
2
4
6
8
10
12
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 = 3.3 V converter mounted vertically with
Vin = 12 V, and maximum MOSFET temperature ≤ 110 °C.
Load Current [Adc]
024681012
Effi
c
i
ency
0.75
0.80
0.85
0.90
0.95
1.00
14 V
12 V
9.6 V
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.
Ambient Temperature [°C]
20 30 40 50 60 70 80 90
Load Current [Adc]
0
2
4
6
8
10
12
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.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 ≤ 110 °C.
Load Current [Adc]
024681012
Power Dissipation [W]
0.0
0.5
1.0
1.5
2.0
2.5
3.0
14 V
12 V
9.6 V
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.
JUL 20, 2006 revised to OCT 18, 2006 Page 12 of 27 www.power-one.com
YS12S10 DC-DC Converter Data Sheet
9.6-14 VDC Input; 0.7525-5.5 VDC Programmable @ 10 A
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: 2 ms/div.
Fig. 3.3V.7: Output voltage response for Vout = 3.3 V to positive
load current step change from 5 A to 10 A with slew rate of 5 A/μs
at Vin = 12 V. Top trace: output voltage (100 mV/div.); Bottom
trace: load current (5 A/div.). Co = 100 μF ceramic. Time scale:
20 μs/div.
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 + 1 μF ceramic, and Vin = 12 V for Vout =
3.3 V. Time scale: 2 μs/div.
Fig. 3.3V.8: Output voltage response for Vout = 3.3 V to negative
load current step change from 10 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.
JUL 20, 2006 revised to OCT 18, 2006 Page 13 of 27 www.power-one.com
YS12S10 DC-DC Converter Data Sheet
9.6-14 VDC Input; 0.7525-5.5 VDC Programmable @ 10 A
Ambient Temperature [°C]
20 30 40 50 60 70 80 90
Load Current [Adc]
0
2
4
6
8
10
12
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 = 2.5 V converter mounted vertically with
Vin = 12 V, and maximum MOSFET temperature ≤ 110 °C.
Load Current [Adc]
024681012
Efficiency
0.75
0.80
0.85
0.90
0.95
1.00
14 V
12 V
9.6 V
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.
Ambient Temperature [°C]
20 30 40 50 60 70 80 90
Load Current [Adc]
0
2
4
6
8
10
12
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.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 ≤ 110 °C.
Load Current [Adc]
024681012
Power Dissipation [W]
0.0
0.5
1.0
1.5
2.0
2.5
3.0
14 V
12 V
9.6 V
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.
JUL 20, 2006 revised to OCT 18, 2006 Page 14 of 27 www.power-one.com
YS12S10 DC-DC Converter Data Sheet
9.6-14 VDC Input; 0.7525-5.5 VDC Programmable @ 10 A
Fig. 2.5V.5: Turn-on transient for Vout = 2.5 V with application of
Vin at full rated load current (resistive) and 47 μF external
capacitance at Vin = 12 V. Top trace: Vin (10 V/div.); Bottom
trace: output voltage (1 V/div.); Time scale: 2 ms/div.
Fig. 2.5V.7: Output voltage response for Vout = 2.5 V to positive
load current step change from 5 A to 10 A with slew rate of 5 A/μs
at Vin = 12 V. Top trace: output voltage (100 mV/div.); Bottom
trace: load current (5 A/div.). Co = 100 μF ceramic. Time scale:
20 μs/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.8: Output voltage response for Vout = 2.5 V to negative
load current step change from 10 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 (5 A/div.). Co = 100 μF ceramic. Time scale:
20 μs/div.
JUL 20, 2006 revised to OCT 18, 2006 Page 15 of 27 www.power-one.com
YS12S10 DC-DC Converter Data Sheet
9.6-14 VDC Input; 0.7525-5.5 VDC Programmable @ 10 A
Ambient Temperature [°C]
20 30 40 50 60 70 80 90
Load Current [Adc]
0
2
4
6
8
10
12
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 = 2.0 V converter mounted vertically with
Vin = 12 V, and maximum MOSFET temperature ≤ 110 °C.
Load Current [Adc]
024681012
Efficiency
0.75
0.80
0.85
0.90
0.95
1.00
14 V
12 V
9.6 V
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.
Ambient Temperature [°C]
20 30 40 50 60 70 80 90
Load Current [Adc]
0
2
4
6
8
10
12
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.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 ≤ 110 °C.
Load Current [Adc]
024681012
Power Dissipation [W]
0.0
0.5
1.0
1.5
2.0
2.5
3.0
14 V
12 V
9.6 V
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.
JUL 20, 2006 revised to OCT 18, 2006 Page 16 of 27 www.power-one.com
YS12S10 DC-DC Converter Data Sheet
9.6-14 VDC Input; 0.7525-5.5 VDC Programmable @ 10 A
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: 2 ms/div.
Fig. 2.0V.7: Output voltage response for Vout = 2.0 V to positive
load current step change from 5 A to 10 A with slew rate of 5 A/μs
at Vin = 12 V. Top trace: output voltage (100 mV/div.); Bottom
trace: load current (5 A/div.). Co = 100 μF ceramic. Time scale:
20 μs/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 + 1 μF ceramic, and Vin = 12 V for Vout =
2.0 V. Time scale: 2 μs/div.
Fig. 2.0V.8: Output voltage response for Vout = 2.0 V to negative
load current step change from 10 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 (5 A/div.). Co = 100 μF ceramic. Time scale:
20 μs/div.
JUL 20, 2006 revised to OCT 18, 2006 Page 17 of 27 www.power-one.com
YS12S10 DC-DC Converter Data Sheet
9.6-14 VDC Input; 0.7525-5.5 VDC Programmable @ 10 A
Ambient Temperature [°C]
20 30 40 50 60 70 80 90
Load Current [Adc]
0
2
4
6
8
10
12
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 = 1.8 V converter mounted vertically with Vin
= 12 V, and maximum MOSFET temperature ≤ 110 °C.
Load Current [Adc]
024681012
Efficiency
0.75
0.80
0.85
0.90
0.95
1.00
14 V
12 V
9.6 V
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.
Ambient Temperature [°C]
20 30 40 50 60 70 80 90
Load Current [Adc]
0
2
4
6
8
10
12
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.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 ≤ 110 °C.
Load Current [Adc]
024681012
Power Dissipation [W]
0.0
0.5
1.0
1.5
2.0
2.5
3.0
14 V
12 V
9.6 V
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.
JUL 20, 2006 revised to OCT 18, 2006 Page 18 of 27 www.power-one.com
YS12S10 DC-DC Converter Data Sheet
9.6-14 VDC Input; 0.7525-5.5 VDC Programmable @ 10 A
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: 2 ms/div.
Fig. 1.8V.7: Output voltage response for Vout = 1.8 V to positive
load current step change from 5 A to 10 A with slew rate of 5 A/μs
at Vin = 12 V. Top trace: output voltage (100 mV/div.); Bottom
trace: load current (5 A/div.). Co = 100 μF ceramic. Time scale:
20 μs/div.
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 + 1 μF ceramic, and Vin = 12 V for Vout =
1.8 V. Time scale: 2 μs/div.
Fig. 1.8V.8: Output voltage response for Vout = 1.8 V to negative
load current step change from 10 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 (5 A/div.). Co = 100 μF ceramic. Time scale:
20 μs/div.
JUL 20, 2006 revised to OCT 18, 2006 Page 19 of 27 www.power-one.com
YS12S10 DC-DC Converter Data Sheet
9.6-14 VDC Input; 0.7525-5.5 VDC Programmable @ 10 A
Ambient Temperature [°C]
20 30 40 50 60 70 80 90
Load Current [Adc]
0
2
4
6
8
10
12
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 = 1.5 V converter mounted vertically with Vin
= 12 V, and maximum MOSFET temperature ≤ 110 °C.
Load Current [Adc]
024681012
Efficienc
y
0.70
0.75
0.80
0.85
0.90
0.95
14 V
12 V
9.6 V
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.
Ambient Temperature [°C]
20 30 40 50 60 70 80 90
Load Current [Adc]
0
2
4
6
8
10
12
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.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 ≤ 110 °C.
Load Current [Adc]
024681012
Power Dissipation [W]
0.0
0.5
1.0
1.5
2.0
14 V
12 V
9.6 V
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.
JUL 20, 2006 revised to OCT 18, 2006 Page 20 of 27 www.power-one.com
YS12S10 DC-DC Converter Data Sheet
9.6-14 VDC Input; 0.7525-5.5 VDC Programmable @ 10 A
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: 2 ms/div.
Fig. 1.5V.7: Output voltage response for Vout = 1.5 V to positive
load current step change from 5 A to 10 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.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 =
1.5 V. Time scale: 2 μs/div.
Fig. 1.5V.8: Output voltage response for Vout = 1.5 V to negative
load current step change from 10 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.
JUL 20, 2006 revised to OCT 18, 2006 Page 21 of 27 www.power-one.com
YS12S10 DC-DC Converter Data Sheet
9.6-14 VDC Input; 0.7525-5.5 VDC Programmable @ 10 A
Ambient Temperature [°C]
20 30 40 50 60 70 80 90
Load Current [Adc]
0
2
4
6
8
10
12
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 = 1.2 V converter mounted vertically with Vin
= 12 V, and maximum MOSFET temperature ≤ 110 °C.
Load Current [Adc]
024681012
Efficiency
0.70
0.75
0.80
0.85
0.90
0.95
14 V
12 V
9.6 V
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.
Ambient Temperature [°C]
20 30 40 50 60 70 80 90
Load Current [Adc]
0
2
4
6
8
10
12
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.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 ≤ 110 °C.
Load Current [Adc]
024681012
Power Dissipation [W]
0.0
0.5
1.0
1.5
2.0
14 V
12 V
9.6 V
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.
JUL 20, 2006 revised to OCT 18, 2006 Page 22 of 27 www.power-one.com
YS12S10 DC-DC Converter Data Sheet
9.6-14 VDC Input; 0.7525-5.5 VDC Programmable @ 10 A
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.7: Output voltage response for Vout = 1.2 V to positive
load current step change from 5 A to 10 A with slew rate of 5 A/μs
at Vin = 12 V. Top trace: output voltage (100 mV/div.); Bottom
trace: load current (5 A/div.). Co = 100 μF ceramic. Time scale:
20 μs/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 + 1 μF ceramic, and Vin = 12 V for Vout = 1.2 V. Time
scale: 2 μs/div.
Fig. 1.2V.8: Output voltage response for Vout = 1.2 V to negative
load current step change from 10 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 (5 A/div.). Co = 100 μF ceramic. Time scale:
20 μs/div.
JUL 20, 2006 revised to OCT 18, 2006 Page 23 of 27 www.power-one.com
YS12S10 DC-DC Converter Data Sheet
9.6-14 VDC Input; 0.7525-5.5 VDC Programmable @ 10 A
Ambient Temperature [°C]
20 30 40 50 60 70 80 90
Load Current [Adc]
0
2
4
6
8
10
12
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 = 1.0 V converter mounted vertically with Vin
= 12 V, and maximum MOSFET temperature ≤ 110 °C.
Load Current [Adc]
024681012
Efficienc
y
0.65
0.70
0.75
0.80
0.85
0.90
14 V
12 V
9.6 V
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.
Ambient Temperature [°C]
20 30 40 50 60 70 80 90
Load Current [Adc]
0
2
4
6
8
10
12
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.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 ≤ 110 °C.
Load Current [Adc]
024681012
Power Dissipation [W]
0.0
0.5
1.0
1.5
2.0
14 V
12 V
9.6 V
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.
JUL 20, 2006 revised to OCT 18, 2006 Page 24 of 27 www.power-one.com
YS12S10 DC-DC Converter Data Sheet
9.6-14 VDC Input; 0.7525-5.5 VDC Programmable @ 10 A
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: 2 ms/div.
Fig. 1.0V.7: Output voltage response for Vout = 1.0 V to positive
load current step change from 5 A to 10 A with slew rate of 5 A/μs
at Vin = 12 V. Top trace: output voltage (100 mV/div.); Bottom
trace: load current (5 A/div.). Co =100 μF ceramic. Time scale:
20 μs/div.
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 + 1 μF ceramic, and Vin = 12 V for Vout = 1.0 V. Time
scale: 2 μs/div.
Fig. 1.0V.8: Output voltage response for Vout = 1.0 V to negative
load current step change from 10 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 (5 A/div.). Co = 100 μF ceramic. Time scale:
20 μs/div.
JUL 20, 2006 revised to OCT 18, 2006 Page 25 of 27 www.power-one.com
YS12S10 DC-DC Converter Data Sheet
9.6-14 VDC Input; 0.7525-5.5 VDC Programmable @ 10 A
Ambient Temperature [°C]
20 30 40 50 60 70 80 90
Load Current [Adc]
0
2
4
6
8
10
12
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 = 0.7525 V converter mounted vertically
with Vin = 12 V, and maximum MOSFET temperature ≤ 110 °C.
Load Current [Adc]
024681012
Efficienc
y
0.65
0.70
0.75
0.80
0.85
0.90
14 V
12 V
9.6 V
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.
Ambient Temperature [°C]
20 30 40 50 60 70 80 90
Load Current [Adc]
0
2
4
6
8
10
12
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.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
≤ 110 °C.
Load Current [Adc]
024681012
Power Dissipation [W]
0.0
0.5
1.0
1.5
2.0
14 V
12 V
9.6 V
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.
JUL 20, 2006 revised to OCT 18, 2006 Page 26 of 27 www.power-one.com
YS12S10 DC-DC Converter Data Sheet
9.6-14 VDC Input; 0.7525-5.5 VDC Programmable @ 10 A
Fig. 0.7525V.5: Turn-on transient for Vout = 0.7525 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 (0.5 V/div.); Time scale: 2
ms/div.
Fig. 0.7525V.7: Output voltage response for Vout = 0.7525 V to
positive load current step change from 5 A to 10 A with slew rate
of 5 A/μs at Vin = 12 V. Top trace: output voltage (100 mV/div.);
Bottom trace: load current (5 A/div.). Co =100 μF ceramic. Time
scale: 20 μs/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 + 1 μF ceramic, and Vin = 12 V for Vout =
0.7525 V. Time scale: 2 μs/div.
Fig. 0.7525V.8: Output voltage response for Vout = 0.7525 V to
negative load current step change from 10 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 (5 A/div.). Co = 100 μF ceramic. Time
scale: 20 μs/div.
JUL 20, 2006 revised to OCT 18, 2006 Page 27 of 27 www.power-one.com
YS12S10 DC-DC Converter Data Sheet
9.6-14 VDC Input; 0.7525-5.5 VDC Programmable @ 10 A
Physical Information
YS12S Pinout (Surface-mount)
TOP VIEW
(*) PIN # 1 ROTATED 90°
6
SIDE VIEW
345
1(*)
2
Converter Part Numbering Scheme
Product
Series
Input
Voltage
Mounting
Scheme
Rated Load
Current
Enable Logic Environmental
YS 12 S 10
–0
Y-Series 9.6 to14 VDC
S ⇒ Surface-
mount
10 A
(0.7525 to 5.5 VDC)
0 ⇒ Standard
(Positive Logic)
D ⇒ Opposite of
Standard
(Negative Logic)
No Suffix ⇒ RoHS
lead-solder-exempt
compliant
G ⇒ RoHS
compliant for all six
substances
The example above describes P/N YS12S10-0: 9.6 to 14 VDC input, surface-mount, 10 A at 0.7525 to 5.5 VDC output, standard
positive logic, and Eutectic Tin/Lead solder. 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: 0.22 oz [6.12 g]
• Converter Height: 0.327” Max., 0.301” Min.
• Recommended Surface-mount Pads:
Min. 0.080” X 0.112” [2.03 x 2.84]
