YEV09T10 10A DC-DC POL Converter
4.5V to 13.8V Input • 0.59V to 5.1V Output
Product Brief
Member of the Family
Applications
• Low voltage, high density systems with
Intermediate Bus Architectures (IBA)
• Point-of-load regulators for high performance
DSP, FPGA, ASIC, and microprocessors
• Desktops, servers, and portable computing
• Broadband, networking, optical, and
communications systems
Benefits
• One part that covers many applications
• Reduces board space, system cost and
complexity, and time to market
Features
• RoHS lead free and lead-solder-exempt products are
available
• High efficiency synchronous buck topology
• Low noise fixed frequency operation
• Wide input voltage range: 4.5V–13.8V
• High continuous output current: 10A
• Programmable output voltage range: 0.59V–5.1V
• Overcurrent, and output overvoltage protections with
automatic restart
• Enable input
• Start up into prebiased load
• No minimum load requirements
• High MTBF of 67 million hours
• Industry standard size through-hole single-in-line
package and pinout
• 0.41”x0.40” (10.4mm x 10.16mm)
• Low height of 0.65” (16.51mm)
• Wide operating temperature range: 0 to 70ºC
• UL94 V-0 flammability rating
• UL60950, CSA C22.2 No. 60950-00, and TUV
EN60950-1:2001
Description
The YEV09T10-0 non-isolated DC-DC point of load (POL) converter delivers up to 10A of output current in an
industry-standard single-in-line (SIP) through-hole package. The YEV09T10-0 POL converter is an ideal choice
for Intermediate Bus Architectures where point of load conversion is a requirement. Operating from a 4.5-13.8V
input the POL converter provides an extremely tightly regulated programmable output voltage of 0.59V to 5.1V.
The POL converter offers exceptional thermal performance, even in high temperature environments with minimal
airflow. This performance is accomplished through the use of advanced circuit solutions, packaging and
processing techniques. The resulting design possesses ultra-high efficiency, excellent thermal management, and
a slim body profile that minimizes impedance to system airflow, thus enhancing cooling for both upstream and
downstream devices. The use of automation for assembly, coupled with advanced power electronics and thermal
design, results in a product with extremely high reliability.
Product Brief www.power-one.com Page 1 of 11
YEV09T10 10A DC-DC POL Converter
4.5V to 13.8V Input • 0.59V to 5.1V Output
Product Brief
1. Ordering Information
YE V 09 T 10 – 01 z
Product
Family
Profile Input
Voltage
PCB
Mounting
Output
Current
Dash ON/OFF Logic RoHS compliance
POL
Converter Vertical 4.5V to
13.8V
Through-
hole 10A
True High Logic:
POL is ON when the
ON/OFF pin is high
No suffix - RoHS compliant
with Pb solder exemption1
G - RoHS compliant for all six
substances
______________________________________
1 The solder exemption refers to all the restricted materials except lead in solder. These materials are Cadmium (Cd), Hexavalent chromium
(Cr6+), Mercury (Hg), Polybrominated biphenyls (PBB), Polybrominated diphenylethers (PBDE), and Lead (Pb) used anywhere except in
solder.
Example: YEV09T10-0G: YEV09T10-0 POL converter with lead-free solder.
2. Absolute Maximum Ratings
Stresses in excess of the absolute maximum ratings may cause performance degradation, adversely affect long-
term reliability, and cause permanent damage to the converter.
Parameter Conditions/Description Min Max Units
Input Voltage Continuous -0.3 15 VDC
Ambient Temperature Range Operating 0 70 °C
Storage Temperature (Ts) -55 125 °C
3. Environmental and Mechanical Specifications
Parameter Conditions/Description Min Nom Max Units
Weight 2.5 grams
MTBF
Calculated Per Telcordia Technologies SR-332,
Method I Case 1, 50% electrical stress,
40°C ambient temperature
67 MHrs
Lead Plating YEV09T10-0 and YEV09T10-0G 100% Matte Tin
Product Brief www.power-one.com Page 2 of 11
YEV09T10 10A DC-DC POL Converter
4.5V to 13.8V Input • 0.59V to 5.1V Output
Product Brief
4. Electrical Specifications
Specifications apply at the input voltage from 4.5V to 13.8V, output load from 0 to 10A, output voltage from 0.59V
to 5.1V, 22µF external output capacitor, and ambient temperature from 0°C to 70°C unless otherwise noted.
4.1 Input Specifications
Parameter Conditions/Description Min Nom Max Units
Input voltage (VIN) 0.59V ≤ VOUT ≤ 3.63V
3.64V ≤ VOUT ≤ 5.1V
4.5
6.5
12
12
13.8
13.8 VDC
Undervoltage Lockout Turn On
Threshold Input Voltage Ramping Up 2.8 3.4 4.5 VDC
Undervoltage Lockout Turn Off
Threshold Input Voltage Ramping Down 2.7 3.3 4.4 VDC
Standby Input Current VIN=12V, POL is disabled via ON/OFF 20 mADC
Input Reflected Ripple Current
Peak-to-Peak
BW=5MHz to 20MHz, LSOURCE=1µH,
See Figure 16 for setup 60 mA
4.2 Output Specifications
Parameter Conditions/Description Min Nom Max Units
Output Voltage Range (VOUT) Programmable with a resistor between
TRIM and GND pins
0.59
5.1
VDC
Output Voltage Setpoint Accuracy,
VOUT≥1V
VIN=12V, IOUT=IOUT MAX,
0.1% trim resistor, room temperature -1.0 1.0 %VOUT
Output Voltage Setpoint Accuracy,
VOUT<1V
VIN=12V, IOUT=IOUT MAX,
0.1% trim resistor, room temperature -10 10 mVDC
Line Regulation, VOUT≥2.5V VIN MIN to VIN MAX 0.2 %VOUT
Load Regulation, VOUT≥2.5V 0 to IOUT MAX 0.4 %VOUT
Line Regulation, VOUT<2.5V VIN MIN to VIN MAX 5 mVDC
Load Regulation, VOUT<2.5V 0 to IOUT MAX 10 mVDC
Output Voltage Regulation
Over operating input voltage, resistive
load, and temperature conditions until
the end of life
-2.0 2.0 %VOUT
Output Voltage Peak-to-Peak
Ripple and Noise, BW=20MHz,
Full Load
VIN=12V, VOUT=1.2V
VIN=12V, VOUT=2.5V
VIN=12V, VOUT=3.3V
5
10
15
25
30
40
mV
mV
mV
Dynamic Regulation
Peak Deviation
Settling Time
VIN=12V,
40 - 80% load step, Slew rate 1A/µs,
to 1% of VOUT
90
30
250
50
mV
µs
Efficiency
VIN=12V
Full Load
Room temperature
VOUT=0.8V
VOUT=1.2V
VOUT=1.5V
VOUT=1.8V
VOUT=2.5V
VOUT=3.3V
VOUT=5.0V
75
81
84
85
89
91
93
%
%
%
%
%
%
%
Switching Frequency 500 kHz
Product Brief www.power-one.com Page 3 of 11
YEV09T10 10A DC-DC POL Converter
4.5V to 13.8V Input • 0.59V to 5.1V Output
Product Brief
Parameter Conditions/Description Min Nom Max Units
Output Current (IOUT) VIN MIN to VIN MAX 0 10 ADC
Turn-On Delay Time1
POL is Enabled
ON/OFF pin is pulled high
From VIN=VIN MIN to VOUT=0.1*VOUT.SET 0.3 1 ms
Turn-On Delay Time1
POL is Disabled
VIN=12V
From ON/OFF pin changing its state
from low to high until VOUT=0.1*VOUT.SET
0.3 1 ms
Rise Time1
COUT=0 µF, Resistive Load
From VOUT=0.1*VOUT.SET to
VOUT=0.9*VOUT.SET 1.3 3 ms
Admissible Output Capacitance IOUT=IOUT MAX, Resistive load, ESR>1mΩ 1,140 µF
__________________________
1 Total start-up time is the sum of the turn-on delay time and the rise time
4.3 Protection Specifications
Parameter Conditions/Description Min Nom Max Units
Output Overcurrent Protection
Type Auto-Restart
Inception Point 105 140 180 %IOUT
Output Short Circuit
Current (RMS value) ROUT<0.01Ω 2 5 A
Output Overvoltage Protection
Type Auto-Restart
Threshold IOUT=IOUT MAX, room temperature 112 115 118 %VO.SET
4.4 Feature Specifications
Parameter Conditions/Description Min Nom Max Units
Enable (ON/OFF pin)
ON/OFF Logic
Positive (enables the output
when ON/OFF pin is open or
pulled high)
N/A
ON/OFF High Input Voltage POL is ON 2.4 5.5 VDC
ON/OFF High Input Current POL is ON 1.0 mADC
ON/OFF Low Input Voltage POL is OFF -0.3 0.4 VDC
ON/OFF Low Input Current POL is OFF 0.55 µADC
Product Brief www.power-one.com Page 4 of 11
YEV09T10 10A DC-DC POL Converter
4.5V to 13.8V Input • 0.59V to 5.1V Output
Product Brief
5. Typical Performance Characteristics
5.1 Efficiency Curves
55
60
65
70
75
80
85
012345678910
Output Current, A
Efficiency, %
Vin = 10V Vin = 12V Vin = 13.8V
Figure 1. Efficiency vs. Load. Vout=1.2V
70
75
80
85
90
95
012345678910
Output Current, A
Efficiency, %
Vin = 10V Vin = 12V Vin = 13.8V
Figure 2. Efficiency vs. Load. Vout=2.5
75
80
85
90
95
012345678910
Output Current, A
Efficiency, %
Vin = 10V Vin = 12V Vin = 13.8V
Figure 3. Efficiency vs. Load. Vout=3.3V
5.2 Turn-On Characteristics
Figure 4. Typical Start-Up Using Remote On/Off
(Vo = 1.2 Vdc, Io=10A). Ch1 – Vout, Ch2 – ON/OFF,
Ch3 - Iout
Product Brief www.power-one.com Page 5 of 11
YEV09T10 10A DC-DC POL Converter
4.5V to 13.8V Input • 0.59V to 5.1V Output
Product Brief
Figure 5. Typical Start-Up Using Remote On/Off
(Vo = 3.3 Vdc, Io=10A). Ch1 – Vout, Ch2 – ON/OFF,
Ch3 - Iout
Figure 6. Typical Start-Up with application of Vin
(Vo = 1.2Vdc, Io = 10A). Ch1 – Vout, Ch3 – Iout,
Ch4 – Vin.
Figure 7. Typical Start-Up with application of Vin
(Vo = 3.3Vdc, Io = 10A). Ch1 – Vout, Ch3 – Iout,
Ch4 – Vin,
5.3 Transient Response
Figure 8. Transient Response to Dynamic Load Change
from 40% to 80% of full load (Vin=12V,
Vo=1.2Vdc). Ch3 – Iout. Scale=0.5A/mVΩ
Product Brief www.power-one.com Page 6 of 11
YEV09T10 10A DC-DC POL Converter
4.5V to 13.8V Input • 0.59V to 5.1V Output
Product Brief
Figure 9. Transient Response to Dynamic Load Change
from 40% to 80% of full load (Vin=12V,
Vo=2.5Vdc). Ch3 – Iout. Scale=0.5A/mVΩ
Figure 10. Transient Response to Dynamic Load Change
from 40% to 80% of full load (Vin=12V,
Vo=3.3Vdc). Ch3 – Iout. Scale=0.5A/mVΩ
5.4 Derating Curves
5
6
7
8
9
10
25 30 35 40 45 50 55
Ambient Temperature (C)
Iout (A)
Vin = 10V Vin = 12V Vin = 13.8V
Figure 11. Derating Curves at Vo=1.2Vdc and 300LFM
5
6
7
8
9
10
25 30 35 40 45 50 55
Ambient Temperature (C)
Iout (A)
Vin = 10V Vin = 12V Vin = 13.8V
Figure 12. Derating Curves at Vo=2.5Vdc and 300LFM
5
6
7
8
9
10
25 30 35 40 45 50 55
Ambient Temperature (C)
Iout (A)
Vin = 10V Vin = 12V Vin = 13.8V
Figure 13. Derating Curves at Vo=3.3Vdc and 300LFM
Product Brief www.power-one.com Page 7 of 11
YEV09T10 10A DC-DC POL Converter
4.5V to 13.8V Input • 0.59V to 5.1V Output
Product Brief
6. Application Information
6.1 Input and Output Impedance
The POL converter should be connected to the DC
power source via low impedance. 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.
Internally, the converter includes 4.7µF (low ESR
ceramics) of input capacitance which eliminates the
need for external input capacitance. However, if the
distribution of the input voltage to the POL converter
contains high inductance, it is recommended to add
a 100µF decoupling capacitor placed as close as
possible to the converter input pins. A low-ESR
tantalum or POS capacitor connected across the
input pins help ensuring stability of the POL
converter and reduce input ripple voltage.
A 22µF ceramic output capacitor is recommended to
improve output ripple and dynamic response.
It is important to keep low resistance and low
inductance of PCB traces for connecting load to the
output pins of the converter in order to maintain good
load regulation.
6.2 Output Voltage Programming
The output voltage can be programmed from 0.59V
to 5.1V by connecting an external resistor RTRIM
between TRIM pin (Pin 5) and GND pin (Pin 3), as
shown in Figure 14.
Figure 14. Programming Output Voltage With A Resistor
The trim resistor RTRIM for a desired output voltage
can be calculated using the following equation:
,
591.0
182.1
−
=
OUT
TRIM V
R kΩ
where:
VOUT = Desired (trimmed) value of output voltage V
RTRIM = Required value of the trim resistor in kΩ
If the RTRIM is not used, the output voltage of the POL
converter will be 0.591V.
Note that the trim resistor tolerance directly affects
the output voltage accuracy. It is recommended to
use ±0.1% trim resistors to meet the output voltage
setpoint accuracy specified in p. 4.2.
Table 1. Trim Resistor Values
V0UT, V Calculated
RTRIM, kΩ
Standard Value of
0.1% Resistor, kΩ
0.8 5.65 5.62
1.2 1.94 1.93
1.5 1.3 1.30
1.8 0.98 0.976
2.5 0.62 0.619
3.3 0.44 0.437
5.0 0.27 0.267
6.3 ON/OFF (Pin 1)
The ON/OFF pin is used to turn the POL converter
ON or OFF remotely by a signal from a system
controller. For positive logic, the POL converter is
ON when the ON/OFF pin is at a logic high (2.4V
min) or left open. The POL converter is OFF when
the ON/OFF pin is at a logic low (0.4V max) or
connected to GND.
The ON/OFF pin should be controlled with an open
collector transistor as shown in Figure 15.
Figure 15. Circuit Configuration For ON/OFF Function
CONTROL
INPUT
VIN
GND
ON
/
OFF
VOUT
3
2
4
1TRIM 5
Rload
INPUT
VOLTAGE
4. 32
k
RTRIM
Interna
l
Enable
Circui
t
YEV09T10
VIN
GND
ON /OFF
VOUT
3
24
1
TRIM
5
Rload
RTRIM
YEV09T10
Product Brief www.power-one.com Page 8 of 11
YEV09T10 10A DC-DC POL Converter
4.5V to 13.8V Input • 0.59V to 5.1V Output
Product Brief
8. Safety
6.4 Protections
The YEV09T10-0 POL converters do not provide
isolation from input to output. The input devices
powering YEV09T10-0 must provide relevant
isolation requirements according to all IEC60950
based standards. Nevertheless, if the system using
the converter needs to receive safety agency
approval, certain rules must be followed in the
design of the system. In particular, all of the
creepage and clearance requirements of the end-use
safety requirements must be observed. These
requirements are included in UL60950 - CSA60950-
00 and EN60950, although specific applications may
have other or additional requirements.
6.4.1 Input Undervoltage Lockout
The POL converter will shut down when the input
voltage drops below a predetermined voltage. It will
start automatically when the input voltage exceeds
the specified threshold.
6.4.2 Output Overcurrent Protection
The POL converter is protected against overcurrent
and short circuit conditions. Upon sensing an
overcurrent condition, the POL converter will enter
hiccup mode of operation. Once the overload or
short circuit condition is removed, the POL converter
will automatically restart and Vout will return to its
nominal value.
The YEV09T10-0 POL converters have no internal
fuse. If required, the external fuse needs to be
provided to protect the converter from catastrophic
failure. Refer to the “Input Fuse Selection for DC/DC
converters” application note on www.power-one.com
for proper selection of the input fuse. Both input
traces and the chassis ground trace (if applicable)
must be capable of conducting a current of 1.5 times
the value of the fuse without opening.
6.4.3 Output Overvoltage Protection
The POL converter is protected against overvoltage
on the output. If the output voltage is higher than
115% of its nominal value set by the RTRIM, the high
side MOSFET will be immediately turned off and the
low side MOSFET will be turned on. The POL
converter will remain in the state until the output
voltage reduces below 115% of its nominal value. At
that point the POL converter will automatically
restart.
To comply with safety agencies’ requirements, a
recognized fuse must be used in series with the input
line. The fuse must not be placed in the grounded
input line. Abnormal and component failure tests
were conducted with the POL input protected by a
fast-acting 20A fuse. If a fuse rated greater than 20A
is used, additional testing may be required.
7. Characterization
7.1 Ripple and Noise
The output voltage ripple and input reflected ripple
current waveforms are measured using the test
setup shown in Figure 16.
The maximum DC voltage between any two pins is
Vin under all operating conditions. In order for the
output of the YEV09T10-0 POL converter to be
considered as SELV (Safety Extra Low Voltage),
according to all IEC60950 based standards, the input
to the POL needs to be supplied by an isolated
secondary source providing a SELV also.
Figure 16. Test Setup For Measuring Input Reflected-Ripple
Current And Output Voltage Ripple
Vout
V
source
22 µF
ceramic
capacito
r
1
µ H
DC
/
DC
Converter
100 µ
F
tant um
al
x+ 2
10µ
F
ceramic
YEV09T10
C
IN
Product Brief www.power-one.com Page 9 of 11
YEV09T10 10A DC-DC POL Converter
4.5V to 13.8V Input • 0.59V to 5.1V Output
Product Brief
9. Pin Assignments and Description
Pin
Name
Pin
Number
Pin
Type
Buffer
Type
Pin Description Notes
ON/OFF 1 I PU Enable Pull high to turn ON the POL
VIN 2 P Input Voltage
GND 3 P Power Ground
VOUT 4 P Output Voltage
TRIM 5 I A Output Voltage Trim
Connect a high accuracy resistor between TRIM
and GMD pins to set the output voltage
Legend: I=input, O=output, I/O=input/output, P=power, A=analog, PU=internal pull-up
10. Mechanical Drawings
All Dimensions are in inches
Tolerances: X.XX: ±0.02” X.XXX: ±0.01”
Figure 17. Mechanical Drawing
Product Brief www.power-one.com Page 10 of 11
YEV09T10 10A DC-DC POL Converter
4.5V to 13.8V Input • 0.59V to 5.1V Output
Product Brief
Figure 18. Recommended Footprint – Top View
Notes:
1. 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.
2. 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.
Product Brief www.power-one.com Page 11 of 11
