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YEV09T03 3A DC-DC POL Converter 4.5V to 13.8V Input 0.59V to 5.1V Output Data Sheet
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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 Description
Features RoHS lead free and lead-solder-exempt products are available Wide operating temperature range: 0 to 70 C; optional to a range of -40 to 85 C High efficiency synchronous buck topology Low noise fixed frequency operation Wide input voltage range: 4.5V-13.8V High continuous output current: 3A Programmable output voltage range: 0.59V-5.1V Overcurrent, and short circuit 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) UL94 V-0 flammability rating UL60950, CSA C22.2 No. 60950-00, and TUV EN60950-1:2001
The YEV09T03, non-isolated DC-DC point of load (POL) converter, delivers up to 3A of output current in an industry-standard single-in-line (SIP) through-hole package. The YEV09T03 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 0.59 V 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.
ZD-01968 Rev 1.1, 25-Mar-09
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YEV09T03 3A DC-DC POL Converter 4.5V to 13.8V Input 0.59V to 5.1V Output Data Sheet
1. Ordering Information
YE Product Family POL Converter
1
V Profile
09 Input Voltage 4.5V to 13.8V
T PCB Mounting Throughhole
03 Output Current 3A
- Dash
0 Options 0 - 0 to 70 C operating range. R - -40 to 85 C operating range.
z RoHS Compliance No suffix - RoHS compliant with Pb solder exemption1 G - RoHS compliant for all six substances
Vertical
______________________________________
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: YEV09T03-0G: YEV09T03 POL converter with the commercial temperature range and lead-free solder. Refer to Figure 1 for label marking information.
Figure 1. Label Drawing
2.
Absolute Maximum Ratings
Stresses in excess of the absolute maximum ratings may cause performance degradation, adversely affect longterm reliability, and cause permanent damage to the converter.
Parameter Input Voltage Ambient Temperature Range Storage Temperature (Ts) Conditions/Description Continuous Operating (-R option) Min -0.3 -40 -55 Max 15 85 125 Units VDC C C
3.
Environmental and Mechanical Specifications
Parameter Weight MTBF Lead Plating Calculated Per Telcordia Technologies SR-332, Method I Case 1, 50% electrical stress, 40C ambient temperature YEV09T03-x and YEV09T03-xG 67 100% Matte Tin Conditions/Description Min Nom Max 2.5 Units grams MHrs
ZD-01968 Rev 1.1, 25-Mar-09
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YEV09T03 3A DC-DC POL Converter 4.5V to 13.8V Input 0.59V to 5.1V Output Data Sheet
4. Electrical Specifications
Specifications apply at the input voltage from 4.5V to 13.8V, output load from 0 to 3A, output voltage from 0.59V to 5.1V, 22F external output capacitor, and ambient temperature from -40C to 85C unless otherwise noted. 4.1 Input Specifications
Parameter Input voltage (VIN) Undervoltage Lockout Turn On Threshold Undervoltage Lockout Turn Off Threshold Standby Input Current Input Reflected Ripple Current Peak-to-Peak Conditions/Description 0.59V VOUT 3.63V 3.64V VOUT 5.1V Input Voltage Ramping Up Input Voltage Ramping Down VIN=12V, POL is disabled via ON/OFF BW=5MHz to 20MHz, LSOURCE=1H, See Figure 14 for setup Min 4.5 6.5 4.1 3.9 Nom 12 12 4.3 4.1 20 60 Max 13.8 13.8 4.5 4.3 Units VDC VDC VDC mADC mA
4.2
Output Specifications
Parameter Output Voltage Range (VOUT) Conditions/Description Programmable with a resistor between TRIM and GND pins VIN=12V, IOUT=IOUT MAX, 0.1% trim resistor, room temperature VIN=12V, IOUT=IOUT MAX, 0.1% trim resistor, room temperature VIN MIN to VIN MAX 0 to IOUT MAX VIN MIN to VIN MAX 0 to IOUT MAX Over operating input voltage, resistive load, and temperature conditions until the end of life VIN=12V, VOUT=0.9V VIN=12V, VOUT=2.5V VIN=12V, VOUT=3.3V VIN=12V, VOUT=5.0V VIN=12V, 40 - 80% load step, Slew rate 1A/s, to 1% of VOUT VOUT=0.9V VOUT=1.2V VOUT=1.5V VOUT=1.8V VOUT=2.5V VOUT=3.3V VOUT=5.0V -2.0 Min 0.59 -1.0 -10 0.5 0.4 5 5 2.0 25 30 40 60 45 25 75 80 84 85 88 90 93 250 50 Nom Max 5.1 1.0 10 Units VDC %VOUT mVDC %VOUT %VOUT mVDC mVDC %VOUT mV mV mV mV mV s % % % % % % %
Output Voltage Setpoint Accuracy, VOUT1V Output Voltage Setpoint Accuracy, VOUT<1V Line Regulation, VOUT2.5V Load Regulation, VOUT2.5V Line Regulation, VOUT<2.5V Load Regulation, VOUT<2.5V Output Voltage Regulation Output Voltage Peak-to-Peak Ripple and Noise, BW=20MHz, Full Load Dynamic Regulation Peak Deviation Settling Time Efficiency VIN=12V Full Load Room temperature
ZD-01968 Rev 1.1, 25-Mar-09
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YEV09T03 3A DC-DC POL Converter 4.5V to 13.8V Input 0.59V to 5.1V Output Data Sheet
Parameter Switching Frequency Output Current (IOUT) Output Current Derating Turn-On Delay Time POL is Enabled
1
Conditions/Description
Min
Nom 560
Max
Units kHz
VIN MIN to VIN MAX TAMB70C ON/OFF pin is pulled high From VIN=VIN MIN to VOUT=0.1*VOUT.SET VIN=12V From ON/OFF pin changing its state from low to high until VOUT=0.1*VOUT.SET From VOUT=0.1*VOUT.SET to VOUT=0.9*VOUT.SET IOUT=IOUT MAX, Resistive load, ESR>1m
0
3 3 0.3 0.3 1.2 1 1 3 1,140
ADC ADC ms ms ms F
Turn-On Delay Time1 POL is Disabled Rise Time1 COUT=0 F, Resistive Load Admissible Output Capacitance
__________________________
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 Output Overcurrent Protection Type Inception Point 105 ROUT<0.01 Auto-Restart 150 1 %IOUT A Min Nom Max Units
Output Short Circuit Current (RMS value)
4.4
Feature Specifications
Parameter Conditions/Description Enable (ON/OFF pin) ON/OFF Logic ON/OFF High Input Voltage ON/OFF High Input Current ON/OFF Low Input Voltage ON/OFF Low Input Current POL is ON POL is ON POL is OFF POL is OFF -0.3 Positive (enables the output when ON/OFF pin is open or pulled high) 2.4 5.5 1.0 0.4 0.55 N/A VDC mADC VDC mADC Min Nom Max Units
ZD-01968 Rev 1.1, 25-Mar-09
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YEV09T03 3A DC-DC POL Converter 4.5V to 13.8V Input 0.59V to 5.1V Output Data Sheet
5. 5.1 Typical Performance Characteristics Efficiency Curves (Room Temperature)
85
Efficiency, % 95 90 85 80 75 70 Vin = 10V 65 0.0 0.5 1.0 Vin = 12V 1.5 2.0 Vin = 13.8V 2.5 3.0
80 75 Efficiency, % 70 65 60 55 50 45 0.0 0.5 1.0 1.5 2.0 2.5 3.0 Output Current, A Vin = 10V Vin = 12V Vin = 13.8V
Output Current, A
Figure 4. Efficiency vs. Load. Vout=3.3V
Figure 2. Efficiency vs. Load. Vout=1.2V
90 85 80 75 70 65 Vin = 10V 60 0.0 0.5 1.0 1.5 2.0 2.5 3.0 Output Current, A Vin = 12V Vin = 13.8V
5.2
Turn-On Characteristics
Efficiency, %
Figure 3. Efficiency vs. Load. Vout=2.5 Figure 5. Typical Start-Up Using Remote On/Off (Vo = 1.2 Vdc, Io=3A). Ch1 - Vout, Ch2 - ON/OFF, Ch3 - Iout
ZD-01968 Rev 1.1, 25-Mar-09
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YEV09T03 3A DC-DC POL Converter 4.5V to 13.8V Input 0.59V to 5.1V Output Data Sheet
Figure 6. Typical Start-Up Using Remote On/Off (Vo = 3.3 Vdc, Io=3A). Ch1 - Vout, Ch2 - ON/OFF, Ch3 - Iout
Figure 8. Typical Start-Up with application of Vin (Vo = 3.3Vdc, Io = 3A). Ch1 - Vout, Ch3 - Iout, Ch4 - Vin,
5.3
Transient Response
Figure 7. Typical Start-Up with application of Vin (Vo = 1.2Vdc, Io = 3A). Ch1 - Vout, Ch3 - Iout, Ch4 - Vin. Figure 9. Transient Response to Dynamic Load Change from 40% to 80% of full load (Vin=12V, Vo=1.2Vdc). Ch3 - Iout. Scale=0.2A/mV
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YEV09T03 3A DC-DC POL Converter 4.5V to 13.8V Input 0.59V to 5.1V Output Data Sheet
6. 6.1 Application Information Input and Output Impedance
Figure 10.
Transient Response to Dynamic Load Change from 40% to 80% of full load (Vin=12V, Vo=2.5Vdc). Ch3 - Iout. Scale=0.2A/mV
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 4.7F (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 100F 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 22F 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 12.
2 VIN 1
YEV09T03
4 VOUT 5 ON/OFF TRIM Rload R TRIM
Figure 11.
Transient Response to Dynamic Load Change from 40% to 80% of full load (Vin=12V, Vo=3.3Vdc). Ch3 - Iout. Scale=0.2A/mV
3 GND
Figure 12. Programming Output Voltage With A Resistor
The trim resistor RTRIM for a desired output voltage can be calculated using the following equation:
RTRIM 1.182 , k VOUT 0.591
ZD-01968 Rev 1.1, 25-Mar-09
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YEV09T03 3A DC-DC POL Converter 4.5V to 13.8V Input 0.59V to 5.1V Output Data Sheet
where: VOUT = Desired (trimmed) value of output voltage V RTRIM = Required value of the trim resistor in k 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
6.4
Protections
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. 7. 7.1 Characterization Ripple and Noise
V0UT, V 0.8 1.2 1.5 1.8 2.5 3.3 5.0
Calculated RTRIM, k 5.65 1.94 1.3 0.98 0.62 0.44 0.27
Standard Value of 0.1% Resistor, k 5.62 1.93 1.30 0.976 0.619 0.437 0.267
The output voltage ripple and input reflected ripple current waveforms are measured using the test setup shown in Figure 14.
6.3
ON/OFF (Pin 1)
1 H
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 13.
INPUT VOLTAGE
V source
CIN 100 F tantalum +2x10 F ceramic
YEV09T03
DC/DC Converter
22 F ceramic capacitor
Vout
Figure 14. Test Setup For Measuring Input Reflected-Ripple Current And Output Voltage Ripple
8.
Safety
2
VIN
YEV09T03
Internal Enable Circuit
VOUT TRIM
4 5 Rload
1 CONTROL INPUT
ON /OFF
4.32k
RTRIM
3
GND
Figure 13. Circuit Configuration For ON/OFF Function
The YEV09T03 POL converters do not provide isolation from input to output. The input devices powering YEV09T03 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 - CSA6095000 and EN60950, although specific applications may have other or additional requirements. The YEV09T03 POL converters have no internal fuse. If required, the external fuse needs to be
ZD-01968 Rev 1.1, 25-Mar-09
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YEV09T03 3A DC-DC POL Converter 4.5V to 13.8V Input 0.59V to 5.1V Output Data Sheet
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. 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 25A fuse. If a fuse rated greater than 25A is used, additional testing may be required. The maximum DC voltage between any two pins is Vin under all operating conditions. In order for the output of the YEV09T03 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.
9.
Pin Assignments and Description
Pin Name Pin Number 1 2 3 4 5 Pin Type I P P P I A Buffer Type PU Pin Description Enable Input Voltage Power Ground Output Voltage Output Voltage Trim Connect a high accuracy resistor between TRIM and GMD pins to set the output voltage Notes Pull high to turn ON the POL
ON/OFF VIN GND VOUT TRIM
Legend: I=input, O=output, I/O=input/output, P=power, A=analog, PU=internal pull-up
ZD-01968 Rev 1.1, 25-Mar-09
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YEV09T03 3A DC-DC POL Converter 4.5V to 13.8V Input 0.59V to 5.1V Output Data Sheet
10. Mechanical Drawings
All Dimensions are in inches Tolerances: X.XX: 0.02" X.XXX: 0.01"
Figure 15. Mechanical Drawing
Figure 16. 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.
ZD-01968 Rev 1.1, 25-Mar-09
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