Data Sheet June 24, 2008 Austin MicrolynxTM II SMT Non-isolated Power Modules: 2.4Vdc – 5.5Vdc input; 0.75Vdc to 3.63Vdc Output; 6A Output Current RoHS Compliant EZ-SEQUENCETM Features Compliant to RoHS EU Directive 2002/95/EC (-Z versions) Compliant to ROHS EU Directive 2002/95/EC with lead solder exemption (non-Z versions) Flexible output voltage sequencing EZTM SEQUENCE Delivers up to 6A output current High efficiency – 96% at 3.3V full load (VIN = 5.0V) Small size and low profile: 27.9 mm x 11.4 mm x 7.24 mm (1.10 in x 0.45 in x 0.285 in) Applications Distributed power architectures Intermediate bus voltage applications Telecommunications equipment Low output ripple and noise High Reliability: o Calculated MTBF = 12.8M hours at 25 C Full-load Output voltage programmable from 0.75 Vdc to 3.63Vdc via external resistor Servers and storage applications Line Regulation: 0.3% (typical) Networking equipment Load Regulation: 0.4% (typical) Enterprise Networks Temperature Regulation: 0.4 % (typical) Latest generation IC’s (DSP, FPGA, ASIC) and Microprocessor powered applications Remote On/Off Output overcurrent protection (non-latching) Wide operating temperature range (-40°C to 85°C) UL* 60950-1Recognized, CSA C22.2 No. 60950-1-03 Certified, and VDE‡ 0805:2001-12 (EN60950-1) Licensed ISO** 9001 and ISO 14001 certified manufacturing facilities † Description Austin MicroLynxTM II SMT (surface mount technology) power modules are non-isolated dc-dc converters that can deliver up to 6A of output current with full load efficiency of 96.0% at 3.3V output. These modules provide a precisely regulated output voltage programmable via an external resistor from 0.75Vdc to 3.63Vdc over a wide TM TM range of input voltage (VIN = 2.4 – 5.5Vdc). Austin MicroLynx II has a sequencing feature, EZ-SEQUENCE that enable designers to implement various types of output voltage sequencing when powering multiple modules on board. * UL is a registered trademark of Underwriters Laboratories, Inc. † CSA is a registered trademark of Canadian Standards Association. VDE is a trademark of Verband Deutscher Elektrotechniker e.V. ** ISO is a registered trademark of the International Organization of Standards ‡ Document No: DS03-107 ver. 1.03 PDF name: microlynx_II_smt_ds.pdf Data Sheet June 24, 2008 Austin MicroLynxTM II SMT Non-isolated Power Modules: 2.4 – 5.5Vdc input; 0.75Vdc to 3.63Vdc Output; 6A output current Absolute Maximum Ratings Stresses in excess of the absolute maximum ratings can cause permanent damage to the device. These are absolute stress ratings only, functional operation of the device is not implied at these or any other conditions in excess of those given in the operations sections of the data sheet. Exposure to absolute maximum ratings for extended periods can adversely affect the device reliability. Parameter Device Symbol Min Max Unit All VIN -0.3 5.8 Vdc Sequencing voltage All Vseq -0.3 VIN,max Vdc Operating Ambient Temperature All TA -40 85 °C All Tstg -55 125 °C Input Voltage Continuous (see Thermal Considerations section) Storage Temperature Electrical Specifications Unless otherwise indicated, specifications apply over all operating input voltage, resistive load, and temperature conditions. Parameter Device Symbol Min Typ Max Unit 2.4 ⎯ 5.5 Vdc 6.0 Adc Operating Input Voltage Vo,set ≤ 3.63 VIN Maximum Input Current All IIN,max VO,set = 0.75 Vdc IIN,No load 20 mA VO,set = 3.3Vdc IIN,No load 45 mA All IIN,stand-by 0.6 mA Inrush Transient All It Input Reflected Ripple Current, peak-to-peak (5Hz to 20MHz, 1μH source impedance; VIN, min to VIN, max, IO= IOmax ; See Test configuration section) All 35 Input Ripple Rejection (120Hz) All 30 (VIN= VIN, min to VIN, max, IO=IO, max ) Input No Load Current (VIN = VIN, nom, Io = 0, module enabled) Input Stand-by Current (VIN = VIN, nom, module disabled) 2 0.04 2 As mAp-p dB CAUTION: This power module is not internally fused. An input line fuse must always be used. This power module can be used in a wide variety of applications, ranging from simple standalone operation to being part of a complex power architecture. To preserve maximum flexibility, internal fusing is not included, however, to achieve maximum safety and system protection, always use an input line fuse. The safety agencies require a fastacting fuse with a maximum rating of 6 A (see Safety Considerations section). Based on the information provided in this data sheet on inrush energy and maximum dc input current, the same type of fuse with a lower rating can be used. Refer to the fuse manufacturer’s data sheet for further information. LINEAGE POWER 2 Data Sheet June 24, 2008 Austin MicroLynxTM II SMT Non-isolated Power Modules: 2.4 – 5.5Vdc input; 0.75Vdc to 3.63Vdc Output; 6A output current Electrical Specifications (continued) Parameter Output Voltage Set-point Device Symbol Min Typ Max Unit All VO, set -2.0 ⎯ +2.0 % VO, set All VO, set –3.0 ⎯ +3.0 % VO, set All VO 0.7525 3.63 Vdc (VIN=IN, min, IO=IO, max, TA=25°C) Output Voltage (Over all operating input voltage, resistive load, and temperature conditions until end of life) Adjustment Range Selected by an external resistor Output Regulation Line (VIN=VIN, min to VIN, max) All ⎯ 0.3 ⎯ % VO, set Load (IO=IO, min to IO, max) All ⎯ 0.4 ⎯ % VO, set Temperature (Tref=TA, min to TA, max) All ⎯ 0.4 ⎯ % VO, set RMS (5Hz to 20MHz bandwidth) All ⎯ 10 15 mVrms Peak-to-Peak (5Hz to 20MHz bandwidth) All ⎯ 40 50 mVpk-pk μF Output Ripple and Noise on nominal output (VIN=VIN, nom and IO=IO, min to IO, max Cout = 1μF ceramic//10μFtantalum capacitors) External Capacitance ESR ≥ 1 mΩ All CO, max ⎯ ⎯ 1000 ESR ≥ 10 mΩ All CO, max ⎯ ⎯ 5000 μF Output Current All Io 0 6 Adc Output Current Limit Inception (Hiccup Mode ) All IO, lim ⎯ 220 ⎯ % Io All IO, s/c ⎯ 2 ⎯ Adc VO, set = 0.75Vdc η 81.2 % VIN= VIN, nom, TA=25°C VO, set = 1.2Vdc η 86.8 % IO=IO, max , VO= VO,set VO,set = 1.5Vdc η 88.8 % VO,set = 1.8Vdc η 89.7 % VO,set = 2.5Vdc η 92.5 % (VO= 90% of VO, set) Output Short-Circuit Current (VO≤250mV) ( Hiccup Mode ) Efficiency Switching Frequency VO,set = 3.3Vdc η All fsw ⎯ 95.4 300 ⎯ kHz % All Vpk ⎯ 130 ⎯ mV Dynamic Load Response (dIo/dt=2.5A/μs; VIN = VIN, nom; TA=25°C) Load Change from Io= 50% to 100% of Io,max; 1μF ceramic// 10 μF tantalum Peak Deviation Settling Time (Vo<10% peak deviation) All ts ⎯ 25 ⎯ μs (dIo/dt=2.5A/μs; VIN = VIN, nom; TA=25°C) All Vpk ⎯ 130 ⎯ mV All ts ⎯ 25 ⎯ μs Load Change from Io= 100% to 50%of Io,max: 1μF ceramic// 10 μF tantalum Peak Deviation Settling Time (Vo<10% peak deviation) LINEAGE POWER 3 Data Sheet June 24, 2008 Austin MicroLynxTM II SMT Non-isolated Power Modules: 2.4 – 5.5Vdc input; 0.75Vdc to 3.63Vdc Output; 6A output current Electrical Specifications (continued) Parameter Device Symbol Min Typ Max Unit All Vpk ⎯ 50 ⎯ mV Dynamic Load Response (dIo/dt=2.5A/μs; V VIN = VIN, nom; TA=25°C) Load Change from Io= 50% to 100% of Io,max; Co = 2x150 μF polymer capacitors Peak Deviation Settling Time (Vo<10% peak deviation) All ts ⎯ 50 ⎯ μs (dIo/dt=2.5A/μs; VIN = VIN, nom; TA=25°C) Load Change from Io= 100% to 50%of Io,max: Co = 2x150 μF polymer capacitors Peak Deviation All Vpk ⎯ 50 ⎯ mV Settling Time (Vo<10% peak deviation) All ts ⎯ 50 ⎯ μs General Specifications Parameter Min Calculated MTBF (IO=IO, max, TA=25°C) Weight LINEAGE POWER Typ Max 12,841,800 ⎯ 2.8 (0.1) Unit Hours ⎯ g (oz.) 4 Austin MicroLynxTM II SMT Non-isolated Power Modules: 2.4 – 5.5Vdc input; 0.75Vdc to 3.63Vdc Output; 6A output current Data Sheet June 24, 2008 Feature Specifications Unless otherwise indicated, specifications apply over all operating input voltage, resistive load, and temperature conditions. See Feature Descriptions for additional information. Parameter Device Symbol Min Typ Max Unit All VIH ― ― VIN, max V μA On/Off Signal interface Device code with Suffix “4” – Positive logic (On/Off is open collector/drain logic input; Signal referenced to GND - See feature description section) Input High Voltage (Module ON) Input High Current All IIH ― ― 10 Input Low Voltage (Module OFF) All VIL -0.2 ― 0.3 V Input Low Current All IIL ― 0.2 1 mA All VIH 1.5 ― VIN,max Vdc Device Code with no suffix – Negative Logic (On/OFF pin is open collector/drain logic input with external pull-up resistor; signal referenced to GND) Input High Voltage (Module OFF) Input High Current All IIH Input Low Voltage (Module ON) All VIL 0.2 1 mA ― 0.3 Vdc Input low Current All IIL ― 10 μA All Tdelay ― 3.9 ― msec All Tdelay ― 3.9 ― msec All Trise ― 4.2 8.5 msec ― 1 % VO, set -0.2 Turn-On Delay and Rise Times o (IO=IO, max , VIN = VIN, nom, TA = 25 C, ) Case 1: On/Off input is set to Logic Low (Module ON) and then input power is applied (delay from instant at which VIN =VIN, min until Vo=10% of Vo,set) Case 2: Input power is applied for at least one second and then the On/Off input is set to logic Low (delay from instant at which Von/Off=0.3V until Vo=10% of Vo, set) Output voltage Rise time (time for Vo to rise from 10% of Vo,set to 90% of Vo, set) Output voltage overshoot – Startup o IO= IO, max; VIN = 3.0 to 5.5Vdc, TA = 25 C Sequencing Delay time Delay from VIN, min to application of voltage on SEQ pin Tracking Accuracy All TsEQ-delay (Power-Up: 2V/ms) All |VSEQ –Vo | 100 200 mV (Power-Down: 1V/ms) All |VSEQ –Vo | 200 400 mV All Tref 150 ⎯ °C (VIN, min to VIN, max; IO, min to IO, max VSEQ < Vo) Overtemperature Protection 10 ⎯ msec (See Thermal Considerations section) Input Undervoltage Lockout Turn-on Threshold Turn-off Threshold LINEAGE POWER All 2.2 V All 2.0 V 5 Austin MicroLynxTM II SMT Non-isolated Power Modules: 2.4 – 5.5Vdc input; 0.75Vdc to 3.63Vdc Output; 6A output current Data Sheet June 24, 2008 Characteristic Curves TM 91 98 88 95 85 EFFICIENCY, η (%) EFFICIENCY, η (%) The following figures provide typical characteristics for the Austin MicroLynx 82 79 VIN=2.4V 76 VIN=5V 73 VIN=5.5V 70 0 1 2 3 4 5 II SMT modules at 25ºC. 92 89 86 83 VIN=2.4V 80 VIN=5V 77 VIN=5.5V 74 6 0 1 OUTPUT CURRENT, IO (A) Figure 1. Converter Efficiency versus Output Current (Vout = 0.75Vdc). 4 5 6 98 91 95 88 92 EFFICIENCY, η (%) EFFICIENCY, η (%) 3 Figure 4. Converter Efficiency versus Output Current (Vout = 1.8Vdc). 94 85 82 V IN=2.4V 79 VIN=5V 76 VIN=5.5V 73 89 86 83 V IN=3V 80 V IN=5V 77 V IN=5.5V 74 70 0 1 2 3 4 5 6 0 1 OUTPUT CURRENT, IO (A) 95 88 92 EFFICIENCY, η (%) 98 91 85 VIN=2.4V 79 VIN=5V 76 VIN=5.5V 73 70 0 1 2 3 4 5 OUTPUT CURRENT, IO (A) Figure3. Converter Efficiency versus Output Current (Vout = 1.5Vdc). LINEAGE POWER 3 4 5 6 Figure 5. Converter Efficiency versus Output Current (Vout = 2.5Vdc). 94 82 2 OUTPUT CURRENT, IO (A) Figure 2. Converter Efficiency versus Output Current (Vout = 1.2Vdc). EFFICIENCY, η (%) 2 OUTPUT CURRENT, IO (A) 6 89 86 83 V IN=4.5V 80 V IN=5V 77 V IN=5.5V 74 0 1 2 3 4 5 6 OUTPUT CURRENT, IO (A) Figure 6. Converter Efficiency versus Output Current (Vout = 3.3Vdc). 6 Austin MicroLynxTM II SMT Non-isolated Power Modules: 2.4 – 5.5Vdc input; 0.75Vdc to 3.63Vdc Output; 6A output current Data Sheet June 24, 2008 Characteristic Curves (continued) INPUT CURRENT, IIN (A) Io =3 A 5 Io =0 A 4 3 2 1 0 1 1.75 2 .5 3 .2 5 4 5.5 TIME, t (5 μs/div) TIME, t (2μs/div) Figure 9. Typical Output Ripple and Noise (Vin = 5.0V dc, Vo = 3.3 Vdc, Io=6A). LINEAGE POWER IO (A) (2A/div) TIME, t (5 μs/div) VO (V) (50mV/div) Figure 11. Transient Response to Dynamic Load Change from 100% to 50% of full load (Vo = 3.3 Vdc). IO (A) (2A/div) VO (V) (20mV/div) OUTPUT VOLTAGE Figure 8. Typical Output Ripple and Noise (Vin = 5.0V dc, Vo = 0.75 Vdc, Io=6A). OUTPUT CURRENT, OUTPUT VOLTAGE TIME, t (2μs/div) VO (V) (100mV/div) Figure 10. Transient Response to Dynamic Load Change from 50% to 100% of full load (Vo = 3.3Vdc). VO (V) (20mV/div) Figure 7. Input voltage vs. Input Current (Vout =2.5Vdc). OUTPUT CURRENT, OUTPUT VOLTAGE 4 .75 OUTPUT VOLTAGE INPUT VOLTAGE, VIN (V) II SMT modules at 25ºC. VO (V) (100mV/div) Io =6 A 6 TM IO (A) (2A/div) 7 OUTPUT CURRENT, OUTPUT VOLTAGE The following figures provide typical characteristics for the MicroLynx TIME, t (10μs/div) Figure 12. Transient Response to Dynamic Load Change from 50% to 100% of full load (Vo = 3.3 Vdc, Cext = 2x150 μF Polymer Capacitors). 7 Data Sheet June 24, 2008 Austin MicroLynxTM II SMT Non-isolated Power Modules: 2.4 – 5.5Vdc input; 0.75Vdc to 3.63Vdc Output; 6A output current Characteristic Curves (continued) TM VIN (V) (2V/div) Vo (V) (1V/div) OUTPUT VOLTAGE, INPUT VOLTAGE VOn/off (V) (2V/div) TIME, t (2 ms/div) Figure 17 Typical Start-Up Using Remote On/Off with Prebias (Vin = 3.3Vdc, Vo = 1.8Vdc, Io = 1.0A, Vbias =1.0Vdc). OUTPUT CURRENT, On/Off VOLTAGE VOn/off (V) (2V/div) VOV) (1V/div) OUTPUT VOLTAGE TIME, t (2 ms/div) Figure 15. Typical Start-Up Using Remote On/Off with Low-ESR external capacitors (7x150uF Polymer) (Vin = 5.0Vdc, Vo = 3.3Vdc, Io = 6A, Co = 1050μF). LINEAGE POWER On/Off VOLTAGE VOn/off (V) (2V/div) VOV) (1V/div) TIME, t (2 ms/div) Figure 14. Typical Start-Up Using Remote On/Off (Vin = 5.0Vdc, Vo = 3.3Vdc, Io = 6A). Figure 16. Typical Start-Up with application of Vin (Vin = 5.0Vdc, Vo = 3.3Vdc, Io = 6A). VOV) (1V/div) On/Off VOLTAGE OUTPUT VOLTAGE Figure 13. Transient Response to Dynamic Load Change from 100% of 50% full load (Vo = 3.3Vdc, Cext = 2x150 μF Polymer Capacitors). TIME, t (2 ms/div) OUTPUT VOLTAGE TIME, t (10μs/div) II SMT modules at 25ºC. IO (A) (5A/div) OUTPUT CURRENT, OUTPUTVOLTAGE IO (A) (2A/div) VO (V) (50mV/div) The following figures provide typical characteristics for the Austin MicroLynx TIME, t (5ms/div) Figure 18. Output short circuit Current (Vin = 5.0Vdc, Vo = 0.75Vdc). 8 Austin MicroLynxTM II SMT Non-isolated Power Modules: 2.4 – 5.5Vdc input; 0.75Vdc to 3.63Vdc Output; 6A output current Data Sheet June 24, 2008 Characteristic Curves (continued) TM The following figures provide thermal derating curves for the Austin MicroLynx 8 6.0 4.5 NC 3.0 0.5m/s (100 LFM ) 1.5 1.0m/s (200 LFM ) 0.0 20 30 40 50 60 70 80 90 O OUTPUT CURRENT, Io (A) OUTPUT CURRENT, Io (A) 7.5 II SMT modules. 6 5 NC 3 0.5m/s (100 LFM ) 2 1.0m/s (200 LFM ) 0 20 30 40 50 60 70 80 90 O AMBIENT TEMPERATURE, TA C AMBIENT TEMPERATURE, TA C Figure 19. Derating Output Current versus Local Ambient Temperature and Airflow (Vin = 5.0, Vo=3.3Vdc). Figure 22. Derating Output Current versus Local Ambient Temperature and Airflow (Vin = 3.3dc, Vo=0.75 Vdc). OUTPUT CURRENT, Io (A) 7.5 6.0 4.5 NC 3.0 0.5m/s (100 LFM ) 1.5 1.0m/s (200 LFM ) 0.0 20 30 40 50 60 70 80 90 O AMBIENT TEMPERATURE, TA C Figure 20. Derating Output Current versus Local Ambient Temperature and Airflow (Vin = 5.0Vdc, Vo=0.75 Vdc). OUTPUT CURRENT, Io (A) 7.5 6.0 4.5 NC 3.0 0.5m/ s (100 LFM ) 1.5 1.0m/s (200 LFM ) 0.0 20 30 40 50 60 70 80 90 O AMBIENT TEMPERATURE, TA C Figure 21. Derating Output Current versus Local Ambient Temperature and Airflow (Vin = 3.3Vdc, Vo=2.5 Vdc). LINEAGE POWER 9 Austin MicroLynxTM II SMT Non-isolated Power Modules: 2.4 – 5.5Vdc input; 0.75Vdc to 3.63Vdc Output; 6A output current Data Sheet June 24, 2008 Test Configurations Design Considerations CURRENT PROBE TO OSCILLOSCOPE VIN(+) 2x100μF Tantalum COM NOTE: Measure input reflected ripple current with a simulated source inductance (LTEST) of 1μH. Capacitor CS offsets possible battery impedance. Measure current as shown above. Figure 23. Input Reflected Ripple Current Test Setup. COPPER STRIP VO (+) RESISTIVE LOAD 1uF . 10uF 120 SCOPE COM GROUND PLANE NOTE: All voltage measurements to be taken at the module terminals, as shown above. If sockets are used then Kelvin connections are required at the module terminals to avoid measurement errors due to socket contact resistance. Figure 24. Output Ripple and Noise Test Setup. Rdistribution Rcontact Rcontact VIN(+) RLOAD VO Rcontact Rcontact COM Rdistribution Figure 25. Output Voltage and Efficiency Test Setup. VO. IO η = VIN. IIN 80 60 40 Vin = 3.3V 20 Vin = 5.0V 0 0 1 2 3 4 x 100 % Output Voltage (Vdc) Figure 26. Input ripple voltage for various output with 1x150 µF polymer and 1x47 µF ceramic capacitors at the input (80% of Io,max). Rdistribution COM NOTE: All voltage measurements to be taken at the module terminals, as shown above. If sockets are used then Kelvin connections are required at the module terminals to avoid measurement errors due to socket contact resistance. Efficiency 100 VO VIN Rdistribution To minimize input voltage ripple, low-ESR polymer and ceramic capacitors are recommended at the input of the module. Figure 26 shows the input ripple voltage (mVp-p) for various outputs with 1x150 µF polymer capacitors (Panasonic p/n: EEFUE0J151R, Sanyo p/n: 6TPE150M) in parallel with 1 x 47 µF ceramic capacitor (Panasonic p/n: ECJ-5YB0J476M, Taiyo- Yuden p/n: CEJMK432BJ476MMT) at full load. Figure 27 shows the input ripple with 2x150 µF polymer capacitors in parallel with 2 x 47 µF ceramic capacitor at full load. Input Ripple Voltage (mVp-p) E.S.R.<0.1Ω @ 20°C 100kHz 120 Input Ripple Voltage (mVp-p) BATTERY CIN CS 1000μF Electrolytic TM The Austin MicroLynx II SMT module should be connected to a low-impedance source. A highly inductive source can affect the stability of the module. An input capacitance must be placed directly adjacent to the input pin of the module, to minimize input ripple voltage and ensure module stability. LTEST 1μH Input Filtering 100 80 60 40 Vin = 3.3V 20 Vin = 5.0V 0 0 1 2 3 4 Output Voltage (Vdc) Figure 27. Input ripple voltage for various output with 2x150 µF polymer and 2x47 µF ceramic capacitors at the input (80% of Io,max). LINEAGE POWER 10 Austin MicroLynxTM II SMT Non-isolated Power Modules: 2.4 – 5.5Vdc input; 0.75Vdc to 3.63Vdc Output; 6A output current Data Sheet June 24, 2008 Design Considerations (continued) Safety Considerations Output Filtering For safety agency approval the power module must be installed in compliance with the spacing and separation requirements of the end-use safety agency standards, i.e., UL 60950-1, CSA C22.2 No. 60950-1-03, and VDE 0850:2001-12 (EN60950-1) Licensed. TM The Austin MicroLynx II SMT module is designed for low output ripple voltage and will meet the maximum output ripple specification with 1 µF ceramic and 10 µF tantalum capacitors at the output of the module. However, additional output filtering may be required by the system designer for a number of reasons. First, there may be a need to further reduce the output ripple and noise of the module. Second, the dynamic response characteristics may need to be customized to a particular load step change. To reduce the output ripple and improve the dynamic response to a step load change, additional capacitance at the output can be used. Low ESR polymer and ceramic capacitors are recommended to improve the dynamic response of the module. For stable operation of the module, limit the capacitance to less than the maximum output capacitance as specified in the electrical specification table. LINEAGE POWER For the converter output to be considered meeting the requirements of safety extra-low voltage (SELV), the input must meet SELV requirements. The power module has extra-low voltage (ELV) outputs when all inputs are ELV. The input to these units is to be provided with a fastacting fuse with a maximum rating of 6A in the positive input lead. 11 Austin MicroLynxTM II SMT Non-isolated Power Modules: 2.4 – 5.5Vdc input; 0.75Vdc to 3.63Vdc Output; 6A output current Data Sheet June 24, 2008 Feature Description Remote On/Off VIN+ TM The Austin Lynx II SMT power modules feature an On/Off pin for remote On/Off operation. Two On/Off logic options are available in the Austin LynxTM II series modules. Positive Logic On/Off signal, device code suffix “4”, turns the module ON during a logic High on the On/Off pin and turns the module OFF during a logic Low. Negative logic On/Off signal, no device code suffix, turns the module OFF during logic High on the On/Off pin and turns the module ON during logic Low. For positive logic modules, the circuit configuration for using the On/Off pin is shown in Figure 28. The On/Off pin is an open collector/drain logic input signal (Von/Off) that is referenced to ground. During a logic-high (On/Off pin is pulled high internal to the module) when the transistor Q1 is in the Off state, the power module is ON. Maximum allowable leakage current of the transistor when Von/off = VIN,max is 10µA. Applying a logic-low when the transistor Q1 is turned-On, the power module is OFF. During this state VOn/Off must be less than 0.3V. When not using positive logic On/off pin, leave the pin unconnected or tie to VIN. MODULE VIN+ R2 ON/OFF + I ON/OFF VON/OFF Q2 PWM Enable R3 + VON/OFF PWM Enable R1 Q2 Q1 CSS R2 GND _ Figure 29. Circuit configuration for using negative logic On/OFF. Overcurrent Protection To provide protection in a fault (output overload) condition, the unit is equipped with internal current-limiting circuitry and can endure current limiting continuously. At the point of current-limit inception, the unit enters hiccup mode. The unit operates normally once the output current is brought back into its specified range. The typical average output current during hiccup is 2A. At input voltages below the input undervoltage lockout limit, module operation is disabled. The module will begin to operate at an input voltage above the undervoltage lockout turn-on threshold. Overtemperature Protection Q3 CSS R4 GND I ON/OFF ON/OFF Input Undervoltage Lockout R1 Q1 MODULE Rpull-up _ Figure 28. Circuit configuration for using positive logic On/OFF. To provide over temperature protection in a fault condition, the unit relies upon the thermal protection feature of the controller IC. The unit will shutdown if the o thermal reference point Tref, exceeds 150 C (typical), but the thermal shutdown is not intended as a guarantee that the unit will survive temperatures beyond its rating. The module will automatically restart after it cools down. For negative logic On/Off devices, the circuit configuration is shown is Figure 29. The On/Off pin is pulled high with an external pull-up resistor (typical Rpull-up = 5k, +/- 5%). When transistor Q1 is in the Off state, logic High is applied to the On/Off pin and the power module is Off. The minimum On/off voltage for logic High on the On/Off pin is 1.5Vdc. To turn the module ON, logic Low is applied to the On/Off pin by turning ON Q1. When not using the negative logic On/Off, leave the pin unconnected or tie to GND. LINEAGE POWER 12 Austin MicroLynxTM II SMT Non-isolated Power Modules: 2.4 – 5.5Vdc input; 0.75Vdc to 3.63Vdc Output; 6A output current Data Sheet June 24, 2008 Feature Descriptions (continued) Output Voltage Programming TM The output voltage of the Austin MicroLynx II SMT can be programmed to any voltage from 0.75 Vdc to 3.63 Vdc by connecting a single resistor (shown as Rtrim in Figure 30) between the TRIM and GND pins of the module. Without an external resistor between TRIM pin and the ground, the output voltage of the module is 0.7525 Vdc. To calculate the value of the resistor Rtrim for a particular output voltage Vo, use the following equation: ⎡ 21070 ⎤ Rtrim = ⎢ − 5110⎥ Ω Vo − 0 . 7525 ⎣ ⎦ For example, to program the output voltage of the Austin TM MicroLynx II module to 1.8 Vdc, Rtrim is calculated is follows: ⎤ ⎡ 21070 Rtrim = ⎢ − 5110⎥ ⎦ ⎣1.8 − 0.7525 By using a 1% tolerance trim resistor, set point tolerance of ±2% is achieved as specified in the electrical specification. The POL Programming Tool, available at www.lineagepower.com under the Design Tools section, helps determine the required external trim resistor needed for a specific output voltage. Voltage Margining Output voltage margining can be implemented in the TM Austin MicroLynx II modules by connecting a resistor, Rmargin-up, from the Trim pin to the ground pin for margining-up the output voltage and by connecting a resistor, Rmargin-down, from the Trim pin to the Output pin for margining-down. Figure 31 shows the circuit configuration for output voltage margining. The POL Programming Tool, available at www.lineagepower.com under the Design Tools section, also calculates the values of Rmargin-up and Rmargin-down for a specific output voltage and % margin. Please consult your local Lineage Power technical representative for additional details. Vo Rtrim = 15.004 kΩ V IN(+) V O(+) Rmargin-down Vout Austin Lynx or Lynx II Series Q2 Trim ON/OFF LOAD TRIM Rmargin-up R trim Rtrim GND Q1 Figure 30. Circuit configuration to program output voltage using an external resistor. Table 1 provides Rtrim values required for some common output voltages. GND Figure 31. Circuit Configuration for margining Output voltage. Table 1 VO, set (V) Rtrim (KΩ) 0.7525 Open 1.2 41.973 1.5 23.077 1.8 15.004 2.5 6.947 3.3 3.160 LINEAGE POWER 13 Data Sheet June 24, 2008 Austin MicroLynxTM II SMT Non-isolated Power Modules: 2.4 – 5.5Vdc input; 0.75Vdc to 3.63Vdc Output; 6A output current Feature Descriptions (continued) Voltage Sequencing Austin MicroLynxTM II series of modules include a sequencing feature, EZ-SEQUENCETM that enables users to implement various types of output voltage sequencing in their applications. This is accomplished via an additional sequencing pin. When not using the sequencing feature, either tie the SEQ pin to VIN or leave it unconnected. When an analog voltage is applied to the SEQ pin, the output voltage tracks this voltage until the output reaches the set-point voltage. The SEQ voltage must be set higher than the set-point voltage of the module. The output voltage follows the voltage on the SEQ pin on a one-to-one volt basis. By connecting multiple modules together, customers can get multiple modules to track their output voltages to the voltage applied on the SEQ pin. For proper voltage sequencing, first, input voltage is applied to the module. The On/Off pin of the module is left unconnected (or tied to GND for negative logic modules or tied to VIN for positive logic modules) so that the module is ON by default. After applying input voltage to the module, a minimum of 10msec delay is required before applying voltage on the SEQ pin. During this time, potential of 50mV (± 10 mV) is maintained on the SEQ pin. After 10msec delay, an analog voltage is applied to the SEQ pin and the output voltage of the module will track this voltage on a one-to-one volt bases until output reaches the set-point voltage. To initiate simultaneous shutdown of the modules, the SEQ pin voltage is lowered in a controlled manner. Output voltage of the modules tracks the voltages below their set-point voltages on a one-to-one basis. A valid input voltage must be maintained until the tracking and output voltages reach ground potential to ensure a controlled shutdown of the modules. When using the EZ-SEQUENCETM feature to control start-up of the module, pre-bias immunity feature during start-up is disabled. The pre-bias immunity feature of the module relies on the module being in the diode-mode TM during start-up. When using the EZ-SEQUENCE feature, modules goes through an internal set-up time of 10msec, and will be in synchronous rectification mode when voltage at the SEQ pin is applied. This will result in sinking current in the module if pre-bias voltage is present at the output of the module. When pre-bias immunity during start-up is required, the EZ-SEQUENCETM feature must be disabled. For additional guidelines on using EZTM TM SEQUENCE feature of Austin MicroLynx II , contact Lineage Power technical representative for preliminary application note on output voltage sequencing using Austin Lynx II series. LINEAGE POWER 14 Data Sheet June 24, 2008 Austin MicroLynxTM II SMT Non-isolated Power Modules: 2.4 – 5.5Vdc input; 0.75Vdc to 3.63Vdc Output; 6A output current Thermal Considerations Power modules operate in a variety of thermal environments; however, sufficient cooling should be provided to help ensure reliable operation. Considerations include ambient temperature, airflow, module power dissipation, and the need for increased reliability. A reduction in the operating temperature of the module will result in an increase in reliability. The thermal data presented here is based on physical measurements taken in a wind tunnel. The test set-up is shown in Figure 33. Note that the airflow is parallel to the long axis of the module as shown in figure 32. The derating data applies to airflow in either direction of the module’s long axis. Please refer to the Application Note “Thermal Characterization Process For Open-Frame BoardMounted Power Modules” for a detailed discussion of thermal aspects including maximum device temperatures. 25.4_ (1.0) Wind Tunnel PWBs Power Module Air Flow 76.2_ (3.0) Tref1 (inductor winding) x 7.24_ (0.285) Probe Location for measuring airflow and ambient temperature Air flow Figure 33. Thermal Test Set-up. Top View Heat Transfer via Convection Tref2 Increased airflow over the module enhances the heat transfer via convection. Thermal derating curves showing the maximum output current that can be delivered by various module versus local ambient temperature (TA) for natural convection and up to 1m/s (200 ft./min) are shown in the Characteristics Curves section. Bottom View Figure 32. Tref Temperature measurement location. The thermal reference point, Tref 1 used in the specifications of thermal derating curves is shown in Figure 32. For reliable operation this temperature should o not exceed 125 C. The output power of the module should not exceed the rated power of the module (Vo,set x Io,max). LINEAGE POWER 15 Data Sheet June 24, 2008 Austin MicroLynxTM II SMT Non-isolated Power Modules: 2.4 – 5.5Vdc input; 0.75Vdc to 3.63Vdc Output; 6A output current Mechanical Outline Dimensions are in millimeters and (inches). Tolerances: x.x mm ± 0.5 mm (x.xx in. ± 0.02 in.) [unless otherwise indicated] x.xx mm ± 0.25 mm (x.xxx in ± 0.010 in.) Top View Side View Bottom View PIN FUNCTION 1 On/Off 2 VIN 3 SEQ 4 GND 5 Trim 6 VOUT Co-planarity (max): 0.102 [0.004] LINEAGE POWER 16 Data Sheet June 24, 2008 Austin MicroLynxTM II SMT Non-isolated Power Modules: 2.4 – 5.5Vdc input; 0.75Vdc to 3.63Vdc Output; 6A output current Recommended Pad Layout Dimensions are in millimeters and (inches). Tolerances: x.x mm ± 0.5 mm (x.xx in. ± 0.02 in.) [unless otherwise indicated] x.xx mm ± 0.25 mm (x.xxx in ± 0.010 in.) Surface Mount Pad Layout – Component side view. LINEAGE POWER 17 Data Sheet June 24, 2008 Austin MicroLynxTM II SMT Non-isolated Power Modules: 2.4 – 5.5Vdc input; 0.75Vdc to 3.63Vdc Output; 6A output current Packaging Details The Austin MicroLynxTM II SMT versions are supplied in tape & reel as standard. Modules are shipped in quantities of 400 modules per reel. All Dimensions are in millimeters and (in inches). Reel Dimensions Outside Dimensions: Inside Dimensions: Width LINEAGE POWER 330.2 mm (13.00) 177.8 mm (7.00”) 44.0 mm (1.73”) 18 Austin MicroLynxTM II SMT Non-isolated Power Modules: 2.4 – 5.5Vdc input; 0.75Vdc to 3.63Vdc Output; 6A output current Data Sheet June 24, 2008 Surface Mount Information Pick and Place TM The Austin MicroLynx II SMT modules use an open frame construction and are designed for a fully automated assembly process. The modules are fitted with a label designed to provide a large surface area for pick and placing. The label meets all the requirements for surface mount processing, as well as safety standards and is able to withstand maximum reflow temperature. The label also carries product information such as product code, serial number and location of manufacture. connection. Sufficient time must be allowed to fuse the plating on the connection to ensure a reliable solder joint. There are several types of SMT reflow technologies currently used in the industry. These surface mount power modules can be reliably soldered using natural forced convection, IR (radiant infrared), or a combination of convection/IR. For reliable soldering the solder reflow profile should be established by accurately measuring the modules CP connector temperatures. 300 P eak Temp 235oC REFLOW TEMP (°C) 250 200 150 So ak zo ne 30-240s 100 Tlim above 205oC P reheat zo ne max 4oCs -1 50 Figure 34. Pick and Place Location. Co o ling zo ne 1-4oCs -1 Heat zo ne max 4oCs -1 0 Nozzle Recommendations Tin Lead Soldering TM The Austin MicroLynx II SMT power modules are lead free modules and can be soldered either in a lead-free solder process or in a conventional Tin/Lead (Sn/Pb) process. It is recommended that the customer review data sheets in order to customize the solder reflow profile for each application board assembly. The following instructions must be observed when soldering these units. Failure to observe these instructions may result in the failure of or cause damage to the modules, and can adversely affect long-term reliability. REFLOW TIME (S) Figure 35. Reflow Profile for Tin/Lead (Sn/Pb) process. 240 235 MAX TEMP SOLDER (°C) The module weight has been kept to a minimum by using open frame construction. Even so, these modules have a relatively large mass when compared to conventional SMT components. Variables such as nozzle size, tip style, vacuum pressure and pick & placement speed should be considered to optimize this process. The minimum recommended nozzle diameter for reliable operation is 3mm. The maximum nozzle outer diameter, which will safely fit within the allowable component spacing, is 8 mm max. 230 225 220 215 210 205 200 0 10 20 30 40 50 60 o Figure 36. Time Limit Curve Above 205 C for Tin/Lead (Sn/Pb) process. In a conventional Tin/Lead (Sn/Pb) solder process peak reflow temperatures are limited to less than o o 235 C. Typically, the eutectic solder melts at 183 C, wets the land, and subsequently wicks the device LINEAGE POWER 19 Austin MicroLynxTM II SMT Non-isolated Power Modules: 2.4 – 5.5Vdc input; 0.75Vdc to 3.63Vdc Output; 6A output current Surface Mount Information (continued) Lead Free Soldering The –Z version Austin MicroLynx II SMT modules are lead-free (Pb-free) and RoHS compliant and are both forward and backward compatible in a Pb-free and a SnPb soldering process. Failure to observe the instructions below may result in the failure of or cause damage to the modules and can adversely affect long-term reliability. Pb-free Reflow Profile Power Systems will comply with J-STD-020 Rev. C (Moisture/Reflow Sensitivity Classification for Nonhermetic Solid State Surface Mount Devices) for both Pb-free solder profiles and MSL classification procedures. This standard provides a recommended forced-air-convection reflow profile based on the volume and thickness of the package (table 4-2). The suggested Pb-free solder paste is Sn/Ag/Cu (SAC). The recommended linear reflow profile using Sn/Ag/Cu solder is shown in Figure. 37. Modules: Soldering and Cleaning Application Note (AN04-001). 300 Per J-STD-020 Rev. C Peak Temp 260°C 250 Reflow Temp (°C) Data Sheet June 24, 2008 200 150 * Min. Time Above 235°C 15 Seconds Heating Zone 1°C/Second Cooling Zone *Time Above 217°C 60 Seconds 100 50 0 Reflow Time (Seconds) Figure 37. Recommended linear reflow profile using Sn/Ag/Cu solder. MSL Rating The Austin MicroLynx II modules have a MSL rating of 1. Storage and Handling The recommended storage environment and handling procedures for moisture-sensitive surface mount packages is detailed in J-STD-033 Rev. A (Handling, Packing, Shipping and Use of Moisture/Reflow Sensitive Surface Mount Devices). Moisture barrier bags (MBB) with desiccant are required for MSL ratings of 2 or greater. These sealed packages should not be broken until time of use. Once the original package is broken, the floor life of the product at conditions of ≤ 30°C and 60% relative humidity varies according to the MSL rating (see J-STD-033A). The shelf life for dry packed SMT packages will be a minimum of 12 months from the bag seal date, when stored at the following conditions: < 40° C, < 90% relative humidity. Post Solder Cleaning and Drying Considerations Post solder cleaning is usually the final circuit-board assembly process prior to electrical board testing. The result of inadequate cleaning and drying can affect both the reliability of a power module and the testability of the finished circuit-board assembly. For guidance on appropriate soldering, cleaning and drying procedures, refer to Board Mounted Power LINEAGE POWER 20 Austin MicroLynxTM II SMT Non-isolated Power Modules: 2.4 – 5.5Vdc input; 0.75Vdc to 3.63Vdc Output; 6A output current Data Sheet June 24, 2008 Ordering Information Please contact your Lineage Power Sales Representative for pricing, availability and optional features. Table 2. Device Codes Device Code Input Voltage Range Output Voltage Output Current Efficiency 3.3V@ 6A On/Off Logic Connector Type Comcodes ATH006A0X-SR 2.4 – 5.5Vdc 0.75 – 3.63Vdc 6A 96.0% Negative SMT 108988358 ATH006A0X-SRZ 2.4 – 5.5Vdc 0.75 – 3.63Vdc 6A 96.0% Negative SMT CC109104535 ATH006A0X4-SR 2.4 – 5.5Vdc 0.75 – 3.63Vdc 6A 96.0% Positive SMT 108988366 ATH006A0X4-SRZ 2.4 – 5.5Vdc 0.75 – 3.63Vdc 6A 96.0% Positive SMT 108996708 -Z refers to RoHS compliant parts Asia-Pacific Headquarters Tel: +65 6416 4283 World Wide Headquarters Lineage Power Corporation 3000 Skyline Drive, Mesquite, TX 75149, USA +1-800-526-7819 (Outside U.S.A.: +1-972-284-2626) www.lineagepower.com e-mail: [email protected] Europe, Middle-East and Africa Headquarters Tel: +49 89 6089 286 India Headquarters Tel: +91 80 28411633 Lineage Power reserves the right to make changes to the product(s) or information contained herein without notice. No liability is assumed as a result of their use or application. No rights under any patent accompany the sale of any such product(s) or information. © 2008 Lineage Power Corporation, (Mesquite, Texas) All International Rights Reserved. LINEAGE POWER 21 Document No: DS03-107 ver. 1.03 PDF name: microlynx_II_smt_ds.pdf