rev. page 1 of 12 date 08/2007 DESCRIPTION: point of load converter PART NUMBER: VPOL15A-5-SIP features * industry standard pin out * high efficiency to 94% * 300 KHz switching frequency * 3.0-5.5 VDC input range * 0.9-3.63 VDC wide output range * over temperature protection * continuous short circuit protection * remote on/off * cost-efficient open frame design * UL/C-UL60950 (E222736) certified Content 1. INTRODUCTION 2. VPOL15A-5-SIP CONVERTER FEATURES 3. GENERAL DESCRIPTION 7. APPLI CATIONS 3.1 Electrical Description 7.3 Thermal Considerations 3.2 Thermal Packaging and Physical Design. 7.4 Power De-Rating Curves 4. TECHNICAL SPECIFICATIONS 5. MAIN FEATURES AND FUNCTI ONS 7.5 Efficiency vs Load Curves 5.1 Operating Temperature Range 7.7 Test Set-Up 5.2 Over-Temperature Protection (OTP) 7.8 Remote Sense Compensation 5.3 Output Voltage Adjustment 7.9 VPOL15A-5-SIP Series Output Voltage Adustment. 5.4 Safe Operating Area (SOA) 7.10 Output Ripple and Noise Measurement 5.5 Over Current Protection 7.11 Output Capacitance 5.6 Remote On/Off 8. MECHANICAL OUTLINE DIAGRAMS 5.7 UVLO (Under-Voltage Lockout) 8.1 VPOL15A-5-SIP Mechanical Outline Diagrams 7.1 Layout Design Challenges. 7.2 Convection Requirements for Cooling 7.6 Input Capacitance at the Power Module 6. SAFETY 6.1 Input Fusing and Safety Considerations. 7. APPLI CATIONS 20050 SW 112th Ave. Tualatin, Oregon 97062 phone 503.612.2300 fax 503.612.2382 rev. PART NUMBER: VPOL15A-5-SIP page 2 of 12 date 08/2007 DESCRIPTION: point of load converter The converter is also protected against over-temperature conditions. If 1. Introduction the converter is overloaded or the ambient temperature gets too high, the converter will shut down to protect the unit. This application note describes the features and functions of V-Infinity’s VPOL15A-5-SIP series of non-isolated dc-dc converters. These are L1 Q1 +VIN +VO highly efficient, reliable and compact, high power density, single output dc-dc converters. These “Point of Load” modules serve the needs Q2 C1 specifically of the fixed and mobile telecommunications and computing D1 C2 R sense market, employing economical distributed power architectures. The +SENSE VPOL15A-5-SIP series provide precisely regulated output voltage range from 0.9V to 3.63Vdc over a wide range of input voltage (Vi=3.0 – COM COM 5.5Vdc) and can operate over an ambient temperature range of –40°C R1 to +85°C. Ultra-high efficiency operation is achieved through the use of synchronous rectification and drive control techniques. PWM IC ON/OFF R trim TRIM ERR AMP The modules are fully protected against short circuit and over- R2 temperature conditions. V-Infinity’s world class automated manufacturing methods, together with an extensive testing and Figure 1. Electrical Block Diagram qualification program, ensure that all VPOL15A-5-SIP series converters are extremely reliable. 2. VPOL15A-5-SIP Converter Features High efficiency topology, typically 94% at 3.3Vdc Industry standard footprint Wide ambient temperature range, -40°C to +85°C Cost efficient open frame design Programmable output voltage via external resistor from 0.9 to 3.63Vdc 3.2 Thermal Packaging and Physical Design. The VPOL15A-5-SIP series uses a multi-layer FR4 PCB construction. All surface mount power components are placed on one side of the PCB, and all low-power control components are placed on the other side. Thus, the Heat dissipation of the power components is optimized, ensuring that control components are not thermally stressed. The converter is an open-frame product and has no case or case pin. The open-frame design has several advantages over encapsulated closed devices. Among these advantages are: No minimum load requirement (Stable at all loads) Efficient Thermal Management: the heat is removed from the Remote On/Off heat generating components without heating more sensitive, small Remote sense compensation signal control components. Fixed switching frequency Environmental: Lead free open-frame converters are more easily Continuous short-circuit protection and over current protection re-cycled. Over-temperature protection (OTP) Cost Efficient: No encapsulation. Cost efficient open-frame Monotonic Startup with pre-bias at the output. construction. UL/IEC/EN60950 Certified. 3. General Description Reliable: Efficient cooling provided by open frame construction offers high reliability and easy diagnostics. 3.1 Electrical Description A block diagram of the VPOL15A-5-SIP Series converter is shown in Figure 1. Extremely high efficiency power conversion is achieved through the use of synchronous rectification and drive techniques. Essentially, the powerful VPOL15A-5-SIP series topology is based on a non-isolated synchronous buck converter. The control loop is optimized for unconditional stability, fast transient response and a very tight line and load regulation. In a typical pre-bias application the VPOL15A-5SIP series converters do not draw any reverse current at start-up. The output voltage can be adjusted from 0.9 to 3.63vdc, using the TRIM pin with a external resistor. The converter can be shut down via a remote on/off input that is referenced to ground. This input is compatible with popular logic devices; a 'positive' logic input is supplied as standard. Positive logic implies that the converter is enabled if the remote on/off input is high (or floating), and disabled if it is low. 20050 SW 112th Ave. Tualatin, Oregon 97062 phone 503.612.2300 fax 503.612.2382 rev. page 3 of 12 date 08/2007 DESCRIPTION: point of load converter PART NUMBER: VPOL15A-5-SIP 4. Technical Specifications (All specifications are typical at nominal input, full load at 25°C unless otherwise noted.) PARAMETER ABSOLUTE MAXIMUM RATINGS Input Voltage Continuous Operating Temp erature See Thermal Considerations Section NOTES and CONDITIONS Device Min. Typical Max. Units ALL 0 5.8 Vdc ALL -40 +85 °C ALL -55 +125 °C ALL 3.0 4.5 5.5 5.5 Vdc Storage Temperature INPUT CHARACTERISTICS Operating Input Voltage Vo=2.7V Vo=3.0V Input Under-Voltage Lockout Turn-On Voltage Threshold Turn-Off Voltage Threshold Lockout Hysteresis Voltage Maximum Input Current Vin=3.0 to 5.5Vdc , Io=Io,max. No-Load Input Current Vo=1.0V Vo=1.2V Vo=1.5V Vo=1.8V Vo=2.0V Vo=2.5V Vo=3.3V Off Converter Input Current Shutdown input idle current ALL ALL ALL ALL 5.0 5.0 Vdc Vdc Vdc 2.8 2.7 0.1 15.5 60 60 60 70 70 70 70 ALL ALL 5 A mA 10 mA 0.4 As Inrush Current (I t) ALL Input Reflected-Ripple Current P-P thru 1uH inductor, 5Hz to 20MHz ALL 150 mA Output Voltage Set Point Vin=Nominal Vin , Io=Io.max, Tc=25°C ALL -1.5% Vo,set +1.5% Vdc Output Voltage Trim Adjustment Range Selected by an external resistor ALL Io=Io.min to Io.max ALL VPOL15A-5-SIP 2 2 OUTPUT CHARACTERISTIC 0.9 3.63 Vdc -0.5 +0.5 % -0.2 -0.4 +0.2 +0.4 % ±0.03 %/°C Output Voltage Regulation Load Regulation Line Regulation Vin=low line to high line Tempera ture Coefficient Ta=-40°C to 85°C Output Voltage Ripple and Noise 5Hz to 20MHz bandwidth ALL Peak-to-Peak Full Load, 1uF ceramic and 10uF tantalum ALL 50 mV RMS Full Load, 1uF ceramic and 10uF tantalum ALL 20 mV Low ESR ALL 10000 uF ALL 0 Output DC Current-Limit Inception Output Voltage =90% Nominal Output Voltage ALL 18 Shout Circuit Protection Continuous with Hiccup Mode External Capacitive Load Operating Output Current Range 20050 SW 112th Ave. Tualatin, Oregon 97062 phone 503.612.2300 fax 503.612.2382 22 15 A 28 A rev. 4 of 12 date 08/2007 DESCRIPTION: point of load converter PART NUMBER: VPOL15A-5-SIP PARAMETER DYNAMIC CHARACTERISTICS page NOTES and CONDITIONS Device Min. Typical Max. Units Output Voltage Transient Response Error Brand 25% Step Load Change, di/dt=0.1A/us ALL Setting Time (within 1% Vout nominal) 25% Step Load Change, di/dt=0.1A/us ALL ±5 % 200 us EFFICIENCY 100% Load Vo=1.0V Vo=1.2V Vo=1.5V Vo=1.8V Vo=2.0V Vo=2.5V Vo=3.3V 82 84 87 88 89 92 94 ALL % ISOLATION CHARACTERISTICS Input to Output Non-isolation 0 Vdc FEATURE CHARACTERISTICS Switching Frequency On/Off Control, Positive Logic Remote On/Off Logic Low (Module Off) Logic High (Module On) On/Off Control, Negative Logic Remote On/Off Logic Low (Module On) Logic High (Module Off) On/Off Current (for both remote on/off logic) Leakage Current (for both remote on/off logic) Turn-On Delay and Rise Time Turn-On Delay Time, From On/Off Control Turn-On Delay Time, From Input Output Voltage Rise Time Over Temperature Protection 300 ALL 0 0.4 Vin Vdc Vdc ALL 0 2.8 0.4 Vin Vdc Vdc 1 1 mA mA or Open Circuit or Open Circuit KHz Ion/off at Von/off =0.0V Logic High, Von/off=5V Von/off to 10%Vo,set Vin,min. to 10%Vo,set 10%Vo,set to 90%Vo,set 1 1 3.5 120 Io=100%of Io.max;Ta=25 °C per MIL-HDBK-217F 1.5 6.8 6 ms ms ms °C GENERAL SPECIFICATIONS MTBF Weight 20050 SW 112th Ave. Tualatin, Oregon 97062 phone 503.612.2300 fax 503.612.2382 M hours grams rev. page 5 of 12 date 08/2007 DESCRIPTION: point of load converter PART NUMBER: VPOL15A-5-SIP current protection. The unit operates normally once the fault condition is 5. Main Features and Functions removed. The power module will supply up to 150% of rated current. In the event of an over current converter will go into a hiccup mode 5.1 Operating Temperature Range protection. V-Infinity’s VPOL15A-5-SIP series converters highly efficient converter 5.6 Remote On/Off design has resulted in its ability to operate over a wide ambient The remote on/off input feature of the converter allows external circuitry temperature environment ( -40°C to 85°C). Due consideration must be to turn the converter on or off. Active-high remote on/off is available as given to the de-rating curves when ascertaining maximum power that can standard. The VPOL15A-5-SIP series converters are turned on if the be drawn from the converter. The maximum power drawn is influenced remote on/off pin is high, or left open or floating. Setting the pin low will by a number of factors, such as: turn the converter ‘Off’. The signal level of the remote on/off input is defined with respect to ground. If not using the remote on/off pin, leave Input voltage range. the pin open (module will be on). The part number suffix “N” is Negative Output load current. Air velocity (forced or natural convection). Mounting orientation of converter PCB with respect to the airflow. Motherboard PCB design, especially ground and power planes. These can be effective heat sinks for the converter. remote on/off version. The unit is guaranteed off over the full temperature range if this voltage level exceeds 2.8Vdc. The converters are turned on If the on/off pin input is low or left open. The recommended VPOL15A-5SIP remote on/off drive circuit is shown as figure 3, 4. 5.2 Over-Temperature Protection (OTP) The VPOL15A-5-SIP series converters are equipped with non-latching over-temperature protection. A te mperature sensor monitors the temperature of the hot spot (typically, top switch). If the temperature exceeds a threshold of 120°C (typical) the converter will shut down, disabling the output. When the temperature has decreased the converter will automatically restart. The over-temperature condition can be induced by a variety of reasons such as external overload condition or a system fan failure. 5.3 Output Voltage Adjustment Section 7.9 describes in detail as to how to trim the output voltage with respect to its set point. The output voltage on all models is trimmable in the range 0.9 – 3.63Vdc. 5.4 Safe Operating Area (SOA) Figure 2 provides a graphical representation of the safe operating area (SOA) of the converter. This representation assumes ambient operating conditions such as airflow are met as per thermal guidelines provided in Sections 7.2 and 7.3. Vo VOLTAGE (V) Vo,nom Safe Operating Area Io,max Io,CL Io CURRENT (A) Figure 2. Maximum Output Current Safe Operating Area 5.5 Over Current Protection All different voltage models have a full continuous short-circuit protection. The unit will auto recover once the short circuit is removed. To provide protection in a fault condition, the unit is equipped with internal over- 20050 SW 112th Ave. Tualatin, Oregon 97062 phone 503.612.2300 fax 503.612.2382 rev. +Vin +Vo date 08/2007 7. Applications 7.1 Layout Design Challenges. Remote ON/OFF In optimizing thermal design the PCB is utilized as a heat sink. Also Q1 VPOL15A-5-SIP Common 6 of 12 DESCRIPTION: point of load converter PART NUMBER: VPOL15A-5-SIP ON/OFF Control page Common some heat is transferred from the VPOL15A-5-SIP module to the main board through connecting pins. The system designer or the end user must ensure that other components and metal in the vicinity of the VPOL15A-5-SIP series meet the spacing requirements to which the system is approved. Figure 3. Positive Remote On/Off Input Drive Circuit Low resistance and low inductance PCB layout traces are the norm and should be used where possible. Due consideration must also be given to +Vin +Vo proper low impedance tracks between power module, input and output grounds. The recommended VPOL15A-5-SIP footprint is shown as figure Q1 VPOL15A-5-SIP ON/OFF Control 5. Remote ON/OFF 0.29(7.4) Common Common Figure 4. Negative Remote On/Off Input Drive Circuit 5.7 UVLO (Under-Voltage Lockout) The voltage on the Vcc pin determines the start of the operation of the LAYOUT PATTERN TOP VIEW All Dimmension In Inches(mm) Tole rance : .XX= ±0.04 .XXX= ±0.010 0.33(8.4) 1.1mm PLATED THROUGH HOLE 1.6mm PAD SIZE Figure 5. Recommended VPOL15A-5-SIP Footprint Converter. When the input Vcc rises and exceeds about 2.8V the converter initiates a soft start. The UVLO function in the converter has a hysteresis (about 100mV) built in to provide noise immunity at start-up. 6. Safety 6.1 Input Fusing and Safety Considerations. Agency Approvals: The power supply shall be submitted to and receive formal approval from the following test agencies. 1.The power supply shall be approved by a nationally recognized testing rd laboratory to UL/CSA 60950 3 Edition (North America) and EN60950 (International) 2. CB Certificate from an internationally recognized test house in accordance with EN 60950. The VPOL15A-5-SIP series converters do not have an internal fuse. However, to achieve maximum safety and system protection, always use an input line fuse. The safety agencies require a time-delay fuse with a maximum rating of 20A. 20050 SW 112th Ave. Tualatin, Oregon 97062 phone 503.612.2300 fax 503.612.2382 rev. page 7 of 12 date 08/2007 DESCRIPTION: point of load converter PART NUMBER: VPOL15A-5-SIP 7.2 Convection Requirements for Cooling Pin6 Inductor Pin To predict the ap proximate cooling needed for the module, refer to the Power De-rating curves in Figures 8 to 10 . These de-rating curves are approximations of the ambient temperatures and airflows required to keep the power module temperature below its maximum rating. Once the module is assembled in the actual system, the module’s temperature should be checked as shown in Figure 6 to ensure it does not exceed 110°C. Proper cooling can be verified by measuring the power module’s Airflow temperature at Q1-pin 6 and Q2-pin 6 as shown in Figure 7. W ind Tunnel Figure 7. Temperature Measurement Location for VPOL15A-5-SIP 25.4(1.0) Bakelite 7.3 Thermal Considerations The power module operates in a variety of thermal environments; however, sufficient cooling should be provided to help ensure reliable Power Module operation of the unit. Heat is removed by conduction, convection, and radiation to the surrounding environment. The thermal data presented is based on measurements taken in a set-up as shown in Figure 6. Figures 8 to 10 represent the test data. Note that the airflow is parallel to the long axis of the module as shown in Figure 6 for the VPOL15A-5-SIP. 76.2(3.0) The temperature at either location should not exceed 110 °C. The output power of the module should not exceed the rated power for the module (VO, set x IO, max). The SMT15 thermal data presented is based on Thermocuple Location for measuring ambient temperature and airflow measurements taken in a wind tunnel. The test setup shown in Fig 6 and EUT need to solder on 33mm x 40.38mm(1.300'' x 1.59'') test pcb. Note that airflow is parallel to the long axis of the module as shown in Fig 6. 12.7(0.5) Air flow Note : Dimensions are in millimeters and (inches) Figure 6. Thermal Test Setup 20050 SW 112th Ave. Tualatin, Oregon 97062 phone 503.612.2300 fax 503.612.2382 rev. TYPICAL POWER DERATING FOR 5 Vin 3.3 Vout SIP15-05S33A Derating Curve 16 14 Output Current(A) 12 10 0LFM 6 100LFM 4 200LFM 2 0 0 10 20 30 40 50 60 70 Ambient Temperature( oC) 8 of 12 date 08/2007 DESCRIPTION: point of load converter PART NUMBER: VPOL15A-5-SIP 8 page 80 90 100 NOTE: 1. specific input & output derating curves available, please contact V-Infinity for detail 20050 SW 112th Ave. Tualatin, Oregon 97062 phone 503.612.2300 fax 503.612.2382 rev. page 9 of 12 date 08/2007 DESCRIPTION: point of load converter PART NUMBER: VPOL15A-5-SIP 7.5 Efficiency vs Load Curves (Fig. 10) VPOL15A-5-SIP Vo=2.5V (Eff Vs Io) VPOL15A-5-SIP Vo=3.3V (Eff Vs Io) 95% 95% 90% 85% 4.5V 5.0V 5.5V 80% 75% Efficincy (%) 100% Efficincy (%) 100% 90% 85% 3.0V 5.0V 5.5V 80% 75% 70% 70% 0 1 2 3 4 5 6 7 8 0 9 10 11 12 13 14 15 1 2 3 4 VPOL15A-5-SIP Vo=1.8V (Eff Vs Io) 95% 90% 85% 3.0V 5.0V 5.5V Efficincy (%) 95% Efficincy (%) 100% 75% 7 8 9 10 11 12 13 14 15 90% 85% 3.0V 5.0V 5.5V 80% 75% 70% 70% 0 1 2 3 4 5 6 7 8 0 9 10 11 12 13 14 15 1 2 3 4 VPOL15A-5-SIP Vo=1.2V (Eff Vs Io) 95% 95% 90% 90% 85% 80% 3.0V 5.0V 5.5V 65% Efficincy (%) 100% 70% 6 7 8 9 10 11 12 13 14 15 VPOL15A-5-SIP Vo=1.0V (Eff Vs Io) 100% 75% 5 Current Load (A) Current Load (A) Efficincy (%) 6 VPOL15A-5-SIP Vo=1.5V (Eff Vs Io) 100% 80% 5 Current Load (A) Current Load (A) 85% 80% 3.0V 5.0V 5.5V 75% 70% 65% 60% 60% 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 Current Load (A) 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 Current Load (A) 20050 SW 112th Ave. Tualatin, Oregon 97062 phone 503.612.2300 fax 503.612.2382 rev. page 10 of 12 date 08/2007 DESCRIPTION: point of load converter PART NUMBER: VPOL15A-5-SIP 7.6 Input Capacitance at the Power Module The VPOL15A-5-SIP converters must be connected to a low AC source The value of line regulation is defined as: impedance. To a void problems with loop stability source inductance should be low. Also, the input capacitors should be placed close to the Line.reg = converter input pins to de-couple distribution inductance. However, the external input capacitors are chosen for suitable ripple handling Where: VHL is the output voltage of maximum input voltage at full load. capability. Low ESR polymers are a good choice. They have high VLL is the output voltage of minimum input voltage at full load. capacitance, high ripple rating and low ESR (typical <20mohm). Current Meter Electrolytic capacitors should be avoided. Circuit as shown in Figure 11 A A +Vo +Sense Power + of 1uH. Current is measured at the input of the module. Supply + Voltage V 100uF Meter Tant. VPOL15A-5-SIP Common To Oscilloscope Voltage Meter V R-Load Common Figure 12. VPOL15A-5-SIP Series Test Setup L1 +Vin 1uH Power Current Meter +Vin represents typical measurement methods for ripple current. Input reflected-ripple current is measured with a simulated source Inductance VHL _ VLL x 100% VLL 7.8 Remote Sense Compensation Remote Sense regulates the output voltage at the point of load. It + 2*100uF Tantalum Supply VPOL15A-5-SIP 220uF ESR<0.1ohm minimizes the effects of distribution losses such as drops across the connecting pin and PCB tracks (see Figure 13). Please note however, the maximum drop from the output pin to the point of load should not exceed 500mV for remote compensation to work. Common The amount of power delivered by the module is defined as the output voltage multiplied by the output current (VO x IO). When using “trim up”, the output voltage of the module will increase Figure 11. Input Reflected-Ripple Test Setup which, if the same output current is maintained, increases the power 7.7 Test Set-Up output by the module. Make sure that the maximum output power of the The basic test set-up to measure parameters such as efficiency and module remains at or below the maximum rated power. load regulation is shown in Figure 12. Things to note are that this When the remote sense feature is not being used, leave sense pin converter is non-isolated, as such the input and output share a common disconnected. ground. These grounds should be connected together via low impedance ground plane in the application circuit. When testing a Figure 13. Circuit Configuration for Remote Sense Operation converter on a bench set-up, ensure that -Vin and -Vo are connected together via a low impedance short to ensure proper efficiency and load regulation measurements are being made. When testing the V-Infinity’s VPOL15A-5-SIP series under any transient conditions please ensure Distribution Losses that the transient response of the source is sufficient to power the equipment under test. We can calculate the +Vin Efficiency +Sense Load regulation and line regulation. The value of efficiency is defined as: ç= Where: Vo x Io x 100% Vin x Iin +Vo VPOL15A-5-SIP Common Common R-Load Distribution Losses Vo is output voltage, Io is output current, Vin is input voltage, Iin is input current. The value of load regulation is defined as: Load .reg = Where: VFL _ VNL x 100% VNL VFL is the output voltage at full load VNL is the output voltage at no load 20050 SW 112th Ave. Tualatin, Oregon 97062 phone 503.612.2300 fax 503.612.2382 rev. page 11 of 12 date 08/2007 DESCRIPTION: point of load converter PART NUMBER: VPOL15A-5-SIP 7.9 VPOL15A-5-SIP Series Output Voltage Adustment. 7.10 Output Ripple and Noise Measurement The output voltage of the VPOL15A-5-SIP can be adjusted in the range The test set-up for noise and ripple measurements is shown in Figure 0.9V to 3.63V by connecting a single resistor on the motherboard 15. a coaxial cable with a 50ohm termination was used to prevent (shown as Rtrim) in Figure 14. When trim resistor is not connected the impedance mismatch reflections disturbing the noise readings at higher output voltage defaults to 0.75V frequencies. +Vin +Vo +Vin Trim R-Load VPOL15A-5-SIP VPOL15A-5-SIP 10uF Tant. 1uF Ceramic R-Load Test Jack R trim-up Common +Vo Common Common Common Figure 15. Output Voltage Ripple and Noise Measurement Set-Up Figure 14. Trim-up Voltage Setup 7.11 Output Capacitance The value of Rtrim-up defined as: V-Infinity’s VPOL15A-5-SIP series converters provide unconditional 21070 _ 5110 ) Rtrim = ( _ Vo 0.75 Where: Rtrim-up is the external resistor in ohm, Vo is the desired output voltage To give an exa mple of the above calculation, to set a voltage of 3.3Vdc, stability with or without external capacitors. For good transient response low ESR output capacitors should be located close to the point of load. For high current applications point has already been made in layout considerations for low resistance and low inductance tracks. Output capacitors with its associated ESR values have an impact on loop stability and bandwidth. V-Infinity’s converters are designed to work with load capacitance up-to 10,000uF. It is rec ommended that any Rtrim is given by: additional capacitance, typically 1,000uF and low ESR (<20mohm), be Rtrim = ( 21070 _ 5110 ) Vo _ 0.75 connected close to the point of load and outside the remote compensation point. Rtrim = 3153 ohm For various output values various resistors are calculated and provided in Table 3 for co nvenience. Vo,set (V) 0.90 1.00 1.20 1.50 1.80 2.00 2.50 3.30 3.63 Rtrim (Kohm) 135.36 79.17 41.71 22.98 14.96 11.75 6.93 3.15 2.20 Table 3 – Trim Resistor Values 20050 SW 112th Ave. Tualatin, Oregon 97062 phone 503.612.2300 fax 503.612.2382 rev. page 12 of 12 date 08/2007 DESCRIPTION: point of load converter PART NUMBER: VPOL15A-5-SIP 8. Mechanical Outline Diagrams 8.1 VPOL15A-5-SIP Mechanical Outline Diagrams Dimensions are in millimeters and inches Tolerance: x.xx ±0.02 in. (0.5mm) , x.xxx ±0.010 in. (0.25 mm) unless otherwise noted SIZE VPOL15A-5-SIP 2.00(50.8) 0.335(8.50)max. 0.23(5.8) 6 7 8 9 10 11 1 2 3 4 5 0.139(3.52) 0.500(12.70) 0.100(2.54) 0.025(0.64) 1.000(25.40) 0.400(10.20) 0.050(1.30) 0.28(7.1) 0.025(0.64) PIN CONNECTION Pin FUNCTION +Output 1 +Output 2 3 +Sense +Output 4 5 6 7 8 9 10 11 Common Common +V Input +V Input No Pin Trim On/Off Control Figure 16 VPOL15A-5-SIP Mechanical Outline Diagram 20050 SW 112th Ave. Tualatin, Oregon 97062 phone 503.612.2300 fax 503.612.2382