Data Sheet May 20, 2009 Pico TLynxTM 6A: Non-Isolated DC-DC Power Modules 2.4 – 5.5Vdc input; 0.6Vdc to 3.63Vdc output; 6A Output Current Features EZ-SEQUENCETM EZ-SEQUENCE RoHS Compliant Compliant to RoHS EU Directive 2002/95/EC (Z versions) Compatible in a Pb-free or SnPb reflow environment (Z versions) Wide Input voltage range (2.4Vdc-5.5Vdc) Output voltage programmable from 0.6Vdc to 3.63 Vdc via external resistor Tunable Loop to optimize dynamic output voltage response Flexible output voltage sequencing EZSEQUENCE – APTH versions Remote sense TM Applications TM Fixed switching frequency Distributed power architectures Output overcurrent protection (non-latching) Intermediate bus voltage applications Overtemperature protection Telecommunications equipment Cost efficient open frame design Servers and storage applications Remote On/Off Networking equipment Ability to sink and source current Industrial Equipment Small size: Vin+ VIN MODULE RTUNE SEQ Cin CTUNE Q1 ON/OFF GND 12.2 mm x 12.2 mm x 7.25 mm Vout+ VOUT SENSE (0.48 in x 0.48 in x 0.29 in) 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 Co TRIM RTrim † Description The Pico TLynxTM 6A power modules are non-isolated dc-dc converters that can deliver up to 6A of output current. These modules operate over a wide range of input voltage (VIN = 2.4Vdc-5.5Vdc) and provide a precisely regulated output voltage from 0.6Vdc to 3.63Vdc, programmable via an external resistor. Features include remote On/Off, adjustable output voltage, over current and overtemperature protection, and output voltage sequencing (APTH versions). A new feature, the Tunable LoopTM , allows the user to optimize the dynamic response of the converter to match the load with reduced amount of output capacitance leading to savings on cost and PWB area. * 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: DS06-132 ver. 1.06 PDF name: APTH006A0X_ds.pdf Data Sheet May 20, 2009 Pico TLynxTM 6A: Non-isolated DC-DC Power Modules 2.4 – 5.5Vdc input; 0.6Vdc 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 6 Vdc APTH VSEQ -0.3 ViN, Max Vdc All TA -40 85 °C All Tstg -55 125 °C Input Voltage Continuous Sequencing Voltage Operating Ambient Temperature (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 6.5 Adc Operating Input Voltage All VIN Maximum Input Current All IIN,max VO,set = 0.6 Vdc IIN,No load 30 mA VO,set = 3.3Vdc IIN,No load 75 mA All IIN,stand-by 2.2 mA Inrush Transient All It Input Reflected Ripple Current, peak-to-peak (5Hz to 20MHz, 1μH source impedance; VIN =0 to 5.5V, IO= IOmax ; See Test Configurations) All 25 mAp-p Input Ripple Rejection (120Hz) All 40 dB (VIN=2.4V to 5.5V, IO=IO, max ) Input No Load Current (VIN = 5.0Vdc, IO = 0, module enabled) Input Stand-by Current (VIN = 5.0Vdc, module disabled) 2 1 2 As 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 an integrated part of sophisticated 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 fast-acting fuse with a maximum rating of 6A (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 Pico TLynxTM 6A: Non-isolated DC-DC Power Modules 2.4 – 5.5Vdc input; 0.6Vdc to 3.63Vdc output; 6A output current Data Sheet May 20, 2009 Electrical Specifications (continued) Parameter Output Voltage Set-point (with 0.5% tolerance for external resistor used to set output voltage) Output Voltage (Over all operating input voltage, resistive load, and temperature conditions until end of life) Adjustment Range Selected by an external resistor Device Symbol Min All VO, set -1.5 All VO, set -3.0 All VO 0.6 Typ ⎯ Max Unit +1.5 % VO, set +3.0 % VO, set 3.63 Vdc Output Regulation (for VO ≥ 2.5Vdc) Line (VIN=VIN, min to VIN, max) All ⎯ +0.4 % VO, set Load (IO=IO, min to IO, max) All ⎯ 10 mV Line (VIN=VIN, min to VIN, max) All ⎯ 10 mV Load (IO=IO, min to IO, max) All ⎯ 5 mV Temperature (Tref=TA, min to TA, max) All ⎯ 0.4 % VO, set 0.5 Vdc 25 35 mVpk-pk 10 15 mVrms ⎯ 47 μF 1000 μF ⎯ 3000 μF Output Regulation (for VO < 2.5Vdc) Remote Sense Range All Output Ripple and Noise on nominal output (VIN=VIN, nom and IO=IO, min to IO, max Co = 0.1μF // 10 μF ceramic capacitors) Peak-to-Peak (5Hz to 20MHz bandwidth) ⎯ All RMS (5Hz to 20MHz bandwidth) External Capacitance 1 TM Without the Tunable Loop ESR ≥ 1 mΩ All CO, max ESR ≥ 0.15 mΩ All CO, max 0 ESR ≥ 10 mΩ All CO, max 0 0 With the Tunable Loop 0 TM Output Current All Io Output Current Limit Inception (Hiccup Mode ) All IO, lim 6 Adc 200 % Io,max Output Short-Circuit Current All IO, s/c 0.23 Adc Efficiency VO,set = 0.6Vdc η 72.3 % VIN= 3.3Vdc, TA=25°C VO, set = 1.2Vdc η 82.7 % IO=IO, max , VO= VO,set VO,set = 1.8Vdc η 87.7 % VO,set = 2.5Vdc η 91.4 % VIN= 5Vdc VO,set = 3.3Vdc η 93.0 % All fsw All Vpk 180 mV All ts 20 μs Load Change from Io= 50% to 0% of Io,max: Co = 0 Peak Deviation All Vpk 170 mV Settling Time (Vo<10% peak deviation) All ts 20 μs (VO≤250mV) ( Hiccup Mode ) Switching Frequency ⎯ 600 ⎯ kHz Dynamic Load Response (dIo/dt=10A/μs; VIN = 5V; Vout = 1.8V, TA=25°C) Load Change from Io= 0% to 50% of Io,max; Co = 0 Peak Deviation Settling Time (Vo<10% peak deviation) 1 TM External capacitors may require using the new Tunable Loop feature to ensure that the module is stable as well as TM getting the best transient response. See the Tunable Loop section for details. LINEAGE POWER 3 Pico TLynxTM 6A: Non-isolated DC-DC Power Modules 2.4 – 5.5Vdc input; 0.6Vdc to 3.63Vdc output; 6A output current Data Sheet May 20, 2009 General Specifications Parameter Min Calculated MTBF (IO=IO, max, TA=25°C) Telecordia Issue 2, Method 1 Case 3 Max Unit 34,602,572 ⎯ Weight Typ Hours ⎯ 1.95 (0.0687) g (oz.) Feature Specifications Unless otherwise indicated, specifications apply over all operating input voltage, resistive load, and temperature conditions. See Feature Descriptions for additional information. Parameter On/Off Signal Interface (VIN=VIN, min to VIN, max ; open collector or equivalent, Device Symbol Min Typ Max Unit ⎯ 10 µA ⎯ VIN,max V Signal referenced to GND) Device with suffix “4” – Positive Logic (See Ordering Information) Logic High (Module ON) Input High Current All IIH Input High Voltage All VIH 1.2 Logic Low (Module OFF) Input Low Current All IIL ⎯ ⎯ 1 mA Input Low Voltage All VIL -0.3 ⎯ 0.3 V Device Code with no suffix – Negative Logic (See Ordering Information) (On/OFF pin is open collector/drain logic input with external pull-up resistor; signal referenced to GND) Logic High (Module OFF) Input High Current All IIH ― ― 1 mA Input High Voltage All VIH VIN – 0.8 ― VIN, max Vdc Logic Low (Module ON) Input low Current All IIL ― ― 0.2 mA Input Low Voltage All VIL -0.2 ― VIN – 1.6 Vdc All Tdelay ― 2 ― msec All Tdelay ― 2 ― msec All Trise ― 5 ― msec 3.0 % VO, set Turn-On Delay and Rise Times (VIN=VIN, nom, IO=IO, max , VO to within ±1% of steady state) Case 1: On/Off input is enabled 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 enabled (delay from instant at which Von/Off is enabled 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) o Output voltage overshoot (TA = 25 C VIN= VIN, min to VIN, max,IO = IO, min to IO, max) With or without maximum external capacitance Over Temperature Protection All Tref 140 °C All TsEQ-delay APTH VSEQ –Vo 100 mV APTH VSEQ –Vo 100 mV (See Thermal Considerations section) Sequencing Delay time Delay from VIN, min to application of voltage on SEQ pin Tracking Accuracy (Power-Up: 2V/ms) (Power-Down: 2V/ms) 10 msec (VIN, min to VIN, max; IO, min to IO, max VSEQ < Vo) LINEAGE POWER 4 Data Sheet May 20, 2009 Pico TLynxTM 6A: Non-isolated DC-DC Power Modules 2.4 – 5.5Vdc input; 0.6Vdc to 3.63Vdc output; 6A output current Feature Specifications (continued) Parameter Device Symbol Min Typ Max Unit Input Undervoltage Lockout Turn-on Threshold All Turn-off Threshold All 1.75 Hysteresis All 0.08 LINEAGE POWER 2.2 Vdc Vdc 0.2 Vdc 5 Pico TLynxTM 6A: Non-isolated DC-DC Power Modules 2.4 – 5.5Vdc input; 0.6Vdc to 3.63Vdc output; 6A output current Data Sheet May 20, 2009 Characteristic Curves The following figures provide typical characteristics for the Pico TLynxTM 6A modules at 0.6Vo and 25oC. 6.2 84 6.0 OUTPUT CURRENT, Io (A) 86 EFFICIENCY, η (%) 82 80 78 76 Vin=2.4V 74 Vin=3.3V 72 Vin=5.5V 70 0 1 2 3 4 5 6 LINEAGE POWER 5.0 30 40 50 60 70 80 90 VO (V) (100mV/div) IO (A) (2Adiv) OUTPUT CURRENT, OUTPUT VOLTAGE Figure 5. Typical Start-up Using On/Off Voltage (Io = Io,max). 5.2 Figure 2. Derating Output Current versus Ambient Temperature and Airflow. TIME, t (20μs /div) VO (V) (200mV/div) Figure 4. Transient Response to Dynamic Load Change from 0% to 50% to 0% with VIN=5V . OUTPUT VOLTAGE VO (V) (200mV/div) VON/OFF(V) (2V/div) TIME, t (1ms/div) 5.4 AMBIENT TEMPERATURE, TA C VIN (V) (2V/div) OUTPUT VOLTAGE ON/OFF VOLTAGE Figure 3. Typical output ripple and noise (VIN = 5V, Io = Io,max). NC 5.6 O INPUT VOLTAGE VO (V) (20mV/div) OUTPUT VOLTAGE TIME, t (1μs/div) 0.5m/s (100LFM) 20 OUTPUT CURRENT, IO (A) Figure 1. Converter Efficiency versus Output Current. 5.8 TIME, t (1ms/div) Figure 6. Typical Start-up Using Input Voltage (VIN = 5V, Io = Io,max). 6 Pico TLynxTM 6A: Non-isolated DC-DC Power Modules 2.4 – 5.5Vdc input; 0.6Vdc to 3.63Vdc output; 6A output current Data Sheet May 20, 2009 Characteristic Curves (continued) The following figures provide typical characteristics for the Pico TLynx OUTPUT CURRENT, Io (A) EFFICIENCY, η (%) 90 85 80 Vin=2.4V Vin=3.3V Vin=5.5V 75 70 0 1 2 3 4 5 6 LINEAGE POWER 5.4 5.2 5.0 30 40 50 60 70 80 90 OUTPUT VOLTAGE VO (V) (100mV/div) IO (A) (2Adiv) OUTPUT CURRENT, TIME, t (20μs /div) Figure 10. Transient Response to Dynamic Load Change from 0% to 50% to 0% with VIN=5V. VO (V) (500mV/div) VO (V) (500mV/div) Figure 11. Typical Start-up Using On/Off Voltage (Io = Io,max). NC 5.6 AMBIENT TEMPERATURE, TA C OUTPUT VOLTAGE OUTPUT VOLTAGE TIME, t (1ms/div) 0.5m/s (100LFM) Figure 8. Derating Output Current versus Ambient Temperature and Airflow. VIN (V) (2V/div) TIME, t (1μs/div) Figure 9. Typical output ripple and noise (VIN = 5V, Io = Io,max). 5.8 O INPUT VOLTAGE VO (V) (20mV/div) OUTPUT VOLTAGE Figure 7. Converter Efficiency versus Output Current. 6.0 20 OUTPUT CURRENT, IO (A) VON/OFF (V) (2V/div) o 6A modules at 1.2Vo and 25 C. 6.2 95 ON/OFF VOLTAGE TM TIME, t (1ms/div) Figure 12. Typical Start-up Using Input Voltage (VIN = 5V, Io = Io,max). 7 Pico TLynxTM 6A: Non-isolated DC-DC Power Modules 2.4 – 5.5Vdc input; 0.6Vdc to 3.63Vdc output; 6A output current Data Sheet May 20, 2009 Characteristic Curves (continued) The following figures provide typical characteristics for the Pico TLynxTM 6A modules at 1.8Vo and 25oC 6.2 95 OUTPUT CURRENT, Io (A) EFFICIENCY, η (%) 90 Vin=2.4V 85 Vin=3.3V Vin=5.5V 80 75 70 0 1 2 3 4 5 6 LINEAGE POWER 5.2 5.0 30 40 50 60 70 80 90 VO (V) (100mV/div) IO (A) (2Adiv) OUTPUT CURRENT, OUTPUT VOLTAGE Figure 17. Typical Start-up Using On/Off Voltage (Io = Io,max). 5.4 Figure 14. Derating Output Current versus Ambient Temperature and Airflow. TIME, t (20μs /div) VO (V) (1V/div) Figure 16. Transient Response to Dynamic Load Change from 0% to 50% to 0% with VIN=5V. OUTPUT VOLTAGE VO (V) (500mV/div) VON/OFF (V) (2V/div) TIME, t (1ms/div) 5.6 AMBIENT TEMPERATURE, TA C VIN (V) (2V/div) OUTPUT VOLTAGE ON/OFF VOLTAGE Figure 15. Typical output ripple and noise (VIN = 5V, Io = Io,max). NC O INPUT VOLTAGE VO (V) (20mV/div) OUTPUT VOLTAGE TIME, t (1μs/div) 5.8 20 OUTPUT CURRENT, IO (A) Figure 13. Converter Efficiency versus Output Current. 6.0 TIME, t (1ms/div) Figure 18. Typical Start-up Using Input Voltage (VIN = 5V, Io = Io,max). 8 Pico TLynxTM 6A: Non-isolated DC-DC Power Modules 2.4 – 5.5Vdc input; 0.6Vdc to 3.63Vdc output; 6A output current Data Sheet May 20, 2009 Characteristic Curves (continued) 6.2 95 6.0 90 Vin=3V 85 Vin=3.3V Vin=5.5V 80 75 70 0 1 2 3 4 5 6 LINEAGE POWER 5.2 5.0 30 40 50 60 70 80 90 OUTPUT VOLTAGE VO (V) (100mV/div) IO (A) (2Adiv) OUTPUT CURRENT, TIME, t (20μs /div) Figure 22. Transient Response to Dynamic Load Change from 0% to 50% to 0% with VIN=5V. VO (V) (1V/div) VO (V) (1V/div) Figure 23. Typical Start-up Using On/Off Voltage (Io = Io,max). 5.4 AMBIENT TEMPERATURE, TA C OUTPUT VOLTAGE OUTPUT VOLTAGE VON/OFF (V) (5V/div) TIME, t (5ms/div) 5.6 Figure 20. Derating Output Current versus Ambient Temperature and Airflow. VIN (V) (2V/div) TIME, t (1μs/div) Figure 21. Typical output ripple and noise (VIN = 5V, Io = Io,max). NC O INPUT VOLTAGE VO (V) (20mV/div) OUTPUT VOLTAGE Figure 19. Converter Efficiency versus Output Current. o 6A modules at 2.5Vo and 25 C 5.8 20 OUTPUT CURRENT, IO (A) ON/OFF VOLTAGE TM 100 OUTPUT CURRENT, Io (A) EFFICIENCY, η (%) The following figures provide typical characteristics for the Pico TLynx TIME, t (1ms/div) Figure 24. Typical Start-up Using Input Voltage (VIN = 5V, Io = Io,max). 9 Pico TLynxTM 6A: Non-isolated DC-DC Power Modules 2.4 – 5.5Vdc input; 0.6Vdc to 3.63Vdc output; 6A output current Data Sheet May 20, 2009 Characteristic Curves (continued) 100 6.2 95 6.0 OUTPUT CURRENT, Io (A) EFFICIENCY, η (%) The following figures provide typical characteristics for the Pico TLynxTM 6A modules at 3.3Vo and 25oC 90 Vin=5.5V 85 Vin=5V Vin=4V 80 75 70 0 1 2 3 4 5 6 LINEAGE POWER 5.0 30 40 50 60 70 80 90 VO (V) (200mV/div) IO (A) (2Adiv) OUTPUT CURRENT, OUTPUT VOLTAGE Figure 29. Typical Start-up Using On/Off Voltage (Io = Io,max). 5.2 Figure 26. Derating Output Current versus Ambient Temperature and Airflow. TIME, t (20μs /div) VO (V) (1V/div) Figure 28. Transient Response to Dynamic Load Change from 0% 50% to 0% with VIN=5V. OUTPUT VOLTAGE VO (V) (1V/div) VON/OFF (V) (2V/div) TIME, t (1ms/div) 5.4 AMBIENT TEMPERATURE, TA C VIN (V) (2V/div) OUTPUT VOLTAGE ON/OFF VOLTAGE Figure 27. Typical output ripple and noise (VIN = 5V, Io = Io,max). 5.6 O INPUT VOLTAGE VO (V) (20mV/div) OUTPUT VOLTAGE TIME, t (1μs/div) NC 20 OUTPUT CURRENT, IO (A) Figure 25. Converter Efficiency versus Output Current. 5.8 TIME, t (1ms/div) Figure 30. Typical Start-up Using Input Voltage (VIN = 5V, Io = Io,max). 10 Pico TLynxTM 6A: Non-isolated DC-DC Power Modules 2.4 – 5.5Vdc input; 0.6Vdc to 3.63Vdc output; 6A output current Data Sheet May 20, 2009 Test Configurations Design Considerations CURRENT PROBE VIN(+) BATTERY CIN CS 1000μF Electrolytic 2x100μF Tantalum E.S.R.<0.1Ω @ 20°C 100kHz 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 31. Input Reflected Ripple Current Test Setup. COPPER STRIP RESISTIVE LOAD Vo+ 10uF 0.1uF TM The Pico TLynx 6A modules should be connected to a low ac-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 COM SCOPE USING BNC SOCKET 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 32. Output Ripple and Noise Test Setup. To minimize input voltage ripple, ceramic capacitors are recommended at the input of the module. Figure 34 shows the input ripple voltage for various output voltages at 6A of load current with 1x22 µF or 2x22 µF ceramic capacitors and an input of 5V. Figure 35 shows data for the 3.3Vin case, with 1x22µF or 2x22µF of ceramic capacitors at the input. 120 Input Ripple Voltage (mVp-p) TO OSCILLOSCOPE 100 80 60 40 1x22uF 20 2x22uF 0 0.5 1 1.5 2 2.5 3 3.5 Output Voltage (Vdc) Figure 34. Input ripple voltage for various output voltages with 1x22 µF or 2x22 µF ceramic capacitors at the input (6A load). Input voltage is 5V. Rcontact Rcontact VIN(+) VO RLOAD VO VIN Rdistribution Rcontact Rcontact COM Rdistribution 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. Figure 33. Output Voltage and Efficiency Test Setup. VO. IO Efficiency η = LINEAGE POWER VIN. IIN x 100 % Input Ripple Voltage (mVp-p) 120 Rdistribution 100 80 60 40 1x22uF 20 2x22uF 0 0.5 1 1.5 2 2.5 3 Output Voltage (Vdc) Figure 35. Input ripple voltage in mV, p-p for various output voltages with 1x22 µF or 2x22 µF ceramic capacitors at the input (6A load). Input voltage is 3.3V. 11 Pico TLynxTM 6A: Non-isolated DC-DC Power Modules 2.4 – 5.5Vdc input; 0.6Vdc to 3.63Vdc output; 6A output current Data Sheet May 20, 2009 Output Filtering 20 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. Figure 36 provides output ripple information for different external capacitance values at various Vo and for load currents of 6A while maintaining an input voltage of 5V. Fig 37 shows the performance with a 3.3V input. For stable operation of the module, limit the capacitance to less than the maximum output capacitance as specified in the electrical specification table. Optimal performance of the module can be achieved by using the Tunable TM Loop feature described later in this data sheet. 25 Ripple(mVp-p) 20 15 1x10uF External Cap 1x47uF External Cap 2x47uF External Cap 4x47uF External Cap 10 5 0 0.5 1 1.5 2 Output Voltage(Volts) 2.5 3 Figure 37. Output ripple voltage for various output voltages with external 1x10 µF, 1x47 µF, 2x47 µF or 4x47 µF ceramic capacitors at the output (6A load). Input voltage is 3.3V. Safety Considerations 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. 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. 1x10uF External Cap 1x47uF External Cap 2x47uF External Cap 4x47uF External Cap 10 15 Ripple(mVp-p) The Pico TLynxTM 6A modules are designed for low output ripple voltage and will meet the maximum output ripple specification with 0.11 µF ceramic and 10 µF ceramic 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. The input to these units is to be provided with a fastacting fuse with a maximum rating of 6A in the positive input lead. 5 0 0.5 1 1.5 2 2.5 3 3.5 Output Voltage(Volts) Figure 36. Output ripple voltage for various output voltages with external 1x10 µF, 1x47 µF, 2x47 µF or 4x47 µF ceramic capacitors at the output (6A load). Input voltage is 5V. LINEAGE POWER 12 Pico TLynxTM 6A: Non-isolated DC-DC Power Modules 2.4 – 5.5Vdc input; 0.6Vdc to 3.63Vdc output; 6A output current Data Sheet May 20, 2009 Feature Descriptions VIN+ MODULE Remote On/Off TM The Pico TLynx 6A modules feature an On/Off pin for remote On/Off operation. Two On/Off logic options are available. In the Positive Logic On/Off option, (device code suffix “4” see Ordering Information), the module turns ON during a logic High on the On/Off pin and turns OFF during a logic Low. With the Negative Logic On/Off option, (no device code suffix see Ordering Information), the module turns OFF during logic High and ON during logic Low. The On/Off signal is always referenced to ground. For either On/Off logic option, leaving the On/Off pin disconnected will turn the module ON when input voltage is present. For positive logic modules, the circuit configuration for using the On/Off pin is shown in Figure 38. When the external transistor Q1 is in the OFF state, Q2 is ON, the internal PWM Enable signal is pulled low and the module is ON. When transistor Q1 is turned ON, the On/Off pin is pulled low, Q2 is turned off and the internal PWM Enable signal is pulled high through the 100K internal pull-up resistor and the module is OFF. VIN+ MODULE 100K 20K PWM Enable I ON/OFF ON/OFF Q1 Q2 + VON/OFF 20K _ GND Figure 38. Circuit configuration for using positive On/Off logic. For negative logic On/Off modules, the circuit configuration is shown in Fig. 39. The On/Off pin should be pulled high with an external pull-up resistor (suggested value for the 2.4V to 5.5Vin range is 3.6Kohms). When transistor Q1 is in the OFF state, the On/Off pin is pulled high and the module is OFF. The On/Off threshold for logic High on the On/Off pin depends on the input voltage and its minimum value is VIN – 1.6V. To turn the module ON, Q1 is turned ON pulling the On/Off pin low. LINEAGE POWER Rpullup 100K I ON/OFF ON/OFF + VON/OFF Q1 GND 2.05K PWM Enable 20K _ Figure 39. Circuit configuration for using negative On/Off logic. Over Current 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. Over Temperature Protection To provide protection in a fault condition, the unit is equipped with a thermal shutdown circuit. The unit will shutdown if the overtemperature threshold of 140oC is exceeded at the thermal reference point Tref . The thermal shutdown is not intended as a guarantee that the unit will survive temperatures beyond its rating. Once the unit goes into thermal shutdown it will then wait to cool before attempting to restart. Input Undervoltage Lockout At input voltages below the input undervoltage lockout limit, the module operation is disabled. The module will begin to operate at an input voltage above the undervoltage lockout turn-on threshold. Output Voltage Programming TM The output voltage of the Pico TLynx 6A module can be programmed to any voltage from 0.6Vdc to 3.63Vdc by connecting a resistor between the Trim and GND pins of the module. Certain restrictions apply on the output voltage set point depending on the input voltage. These are shown in the Output Voltage vs. Input Voltage Set Point Area plot in Fig. 40. The Upper Limit curve shows that the entire output voltage range is available with the maximum input voltage of 5.5V. The Lower Limit curve shows that for output voltages of 1.8V and higher, the input voltage needs to be larger than the minimum of 2.4V. 13 Pico TLynxTM 6A: Non-isolated DC-DC Power Modules 2.4 – 5.5Vdc input; 0.6Vdc to 3.63Vdc output; 6A output current Data Sheet May 20, 2009 6 V IN(+) Input Voltage (v) 5 V O(+) Vout Upper Limit 4 ON/OFF 3 LOAD TRIM Lower Limit 2 R trim 1 GND 0 0.5 1 1.5 2 2.5 3 3.5 4 Output Voltage (V) Figure 40. Output Voltage vs. Input Voltage Set Point Area plot showing limits where the output voltage can be set for different input voltages. Without an external resistor between Trim and GND pins, the output of the module will be 0.6Vdc. To calculate the value of the trim resistor, Rtrim for a desired output voltage, use the following equation: ⎡ 1.2 ⎤ Rtrim = ⎢ ⎥ kΩ ⎣ (Vo − 0.6 )⎦ Figure 41. Circuit configuration for programming output voltage using an external resistor. Remote Sense TM The Pico TLynx 6A modules have a Remote Sense feature to minimize the effects of distribution losses by regulating the voltage at the SENSE pin. The voltage between the SENSE pin and VOUT pin must not exceed 0.5V. Note that the output voltage of the module cannot exceed the specified maximum value. This includes the voltage drop between the SENSE and Vout pins. When the Remote Sense feature is not being used, connect the SENSE pin to the VOUT pin. Rtrim is the external resistor in kΩ Voltage Margining Vo is the desired output voltage. Output voltage margining can be implemented in the TM Pico TLynx 6A 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 42 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. Table 1 provides Rtrim values required for some common output voltages. Table 1 VO, set (V) Rtrim (KΩ) 0.6 1.0 1.2 1.5 1.8 2.5 3.3 Open 3.0 2.0 1.333 1.0 0.632 0.444 By using a ±0.5% tolerance trim resistor with a TC of ±25ppm, a set point tolerance of ±1.5% can be 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 trim resistor needed for a specific output voltage. LINEAGE POWER 14 Pico TLynxTM 6A: Non-isolated DC-DC Power Modules 2.4 – 5.5Vdc input; 0.6Vdc to 3.63Vdc output; 6A output current Data Sheet May 20, 2009 Vo Rmargin-down MODULE Q2 Trim Rmargin-up Rtrim 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 10msec delay is required before applying voltage on the SEQ pin. This delay gives the module enough time to complete its internal power-up soft-start cycle. During the delay time, the SEQ pin should be held close to ground (nominally 50mV ± 20 mV). This is required to keep the internal opamp out of saturation thus preventing output overshoot during the start of the sequencing ramp. By selecting resistor R1 (see fig. 43) according to the following equation R1 = Q1 GND Figure 42. Circuit Configuration for margining Output voltage. 24950 VIN − 0.05 ohms, the voltage at the sequencing pin will be 50mV when the sequencing signal is at zero. MODULE VIN+ Monotonic Start-up and Shutdown TM The Pico TLynx 6A modules have monotonic start-up and shutdown behavior for any combination of rated input voltage, output current and operating temperature range. Startup into Pre-biased Output TM The 5.5V Pico TLynx 6A modules can start into a prebiased output as long as the prebias voltage is 0.5V less than the set output voltage. Note that prebias operation is not supported when output voltage sequencing is used. Output Voltage Sequencing The APTH006A0X modules include a sequencing feature, EZ-SEQUENCE 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 final value of 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 the SEQ pins of multiple modules together, all modules can 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 LINEAGE POWER 499K + OUT R1 SEQ 10K - GND Figure 43. Circuit showing connection of the sequencing signal to the SEQ pin. After the 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 the output reaches the set-point voltage. To initiate simultaneous shutdown of the modules, the SEQ pin voltage is lowered in a controlled manner. The 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. When using the EZ-SEQUENCETM feature to control start-up of the module, pre-bias immunity during start-up is disabled. The pre-bias immunity feature of the module relies on the module being in the diode-mode during start-up. When using the EZ-SEQUENCETM feature, modules goes through an internal set-up time of 10msec, and will be in synchronous rectification mode when the voltage at the SEQ pin is applied. This will result in the module sinking current if a pre-bias voltage is present at the output of the module. When pre-bias immunity during start-up is required, the EZ- 15 Pico TLynxTM 6A: Non-isolated DC-DC Power Modules 2.4 – 5.5Vdc input; 0.6Vdc to 3.63Vdc output; 6A output current Data Sheet May 20, 2009 TM SEQUENCE feature must be disabled. For additional guidelines on using the EZ-SEQUENCETM feature please refer to Application Note AN04-008 “Application Guidelines for Non-Isolated Converters: Guidelines for Sequencing of Multiple Modules”, or contact the Lineage Power technical representative for additional information. Tunable LoopTM TM The 5V Pico TLynx 6A modules have a new feature that optimizes transient response of the module called TM Tunable Loop . External capacitors are usually added to the output of the module for two reasons: to reduce output ripple and noise (see Figures 36 and 37) and to reduce output voltage deviations from the steady-state value in the presence of dynamic load current changes. Adding external capacitance however affects the voltage control loop of the module, typically causing the loop to slow down with sluggish response. Larger values of external capacitance could also cause the module to become unstable. The Tunable LoopTM allows the user to externally adjust the voltage control loop to match the filter network connected to the output of the module. The Tunable TM Loop is implemented by connecting a series R-C between the SENSE and TRIM pins of the module, as shown in Fig. 44. This R-C allows the user to externally adjust the voltage loop feedback compensation of the module. VOUT SENSE In applications with tight output voltage limits in the presence of dynamic current loading, additional output capacitance will be required. Tables 3 and 5 lists recommended values of RTUNE and CTUNE in order to meet 2% output voltage deviation limits for some common output voltages in the presence of a 3A to 6A step change (50% of full load), with an input voltage of 5V or 3.3V respectively Please contact your Lineage Power technical representative to obtain more details of this feature as well as for guidelines on how to select the right value of external R-C to tune the module for best transient performance and stable operation for other output capacitance values or input voltages other than 5V. Table 2. General recommended values of of RTUNE and CTUNE for Vin=5V and various external ceramic capacitor combinations. Cext 1x47μF 2x47μF 4x47μF 6x47μF 10x47μF 20x47μF RTUNE 47 CTUNE 4700pF 47 47 33 33 33 10nF 33nF 47nF 56nF 68nF Table 3. Recommended values of RTUNE and CTUNE to obtain transient deviation of ≤2% of Vout for a 3A step load with Vin=5V. Vo 3.3V 2.5V 1.8V 1.2V 0.6V 1 x 47μF 6 x 47μF 3 x 47μF 4 x 47μF 5 x 47μF + 330uF + 330uF Polymer Polymer Co RTUNE 100 56 47 33 33 CTUNE 15nF 18nF 27nF 47nF 39nF ΔV 58mV 45mV 34mV 24mV 12mV RTUNE MODULE CO CTUNE Co TRIM GND RTrim Figure. 44. Circuit diagram showing connection of RTUME and CTUNE to tune the control loop of the module. Recommended values of RTUNE and CTUNE for different output capacitor combinations are given in Tables 2, 3, 4 and 5. Tables 2 and 4 shows the recommended values of RTUNE and CTUNE for different values of ceramic output capacitors up to 940uF that might be needed for an application to meet output ripple and noise requirements. Selecting RTUNE and CTUNE according to Tables 3 or 5 will ensure stable operation of the module. LINEAGE POWER Table 4. General recommended values of of RTUNE and CTUNE for Vin=3.3V and various external ceramic capacitor combinations. 1x47μF 2x47μF 4x47μF 6x47μF 10x47μF 20x47μF RTUNE 47 47 47 33 33 33 CTUNE 10nF 15nF 39nF 47nF 68nF 82nF Table 5. Recommended values of RTUNE and CTUNE to obtain transient deviation of ≤2% of Vout for a 3A step load with Vin=3.3V. Vo Co 2.5V 1.8V 6 x 47μF 6 x 47μF 1.2V 0.6V 2 x 47μF + 330uF Polymer 2 x 330uF Polymer RTUNE 33 33 33 33 CTUNE 47nF 47nF 68nF 220nF ΔV 46mV 33mV 24mV 12mV 16 Pico TLynxTM 6A: Non-isolated DC-DC Power Modules 2.4 – 5.5Vdc input; 0.6Vdc to 3.63Vdc output; 6A output current Data Sheet May 20, 2009 Thermal Considerations Power modules operate in a variety of thermal environments; however, sufficient cooling should always 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 45. The preferred airflow direction for the module is in Figure 46. Figure 46. Preferred airflow direction and location of hot-spot of the module (Tref). 25.4_ (1.0) Wind Tunnel PWBs Power Module 76.2_ (3.0) x 12.7_ (0.50) Probe Location for measuring airflow and ambient temperature Air flow Figure 45. Thermal Test Setup. The thermal reference points, Tref used in the specifications are also shown in Figure 43. For reliable operation the temperatures at these points should not o exceed 125 C. The output power of the module should not exceed the rated power of the module (Vo,set x Io,max). 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. LINEAGE POWER 17 Pico TLynxTM 6A: Non-isolated DC-DC Power Modules 2.4 – 5.5Vdc input; 0.6Vdc to 3.63Vdc output; 6A output current Data Sheet May 20, 2009 Example Application Circuit Requirements: Vin: 3.3V Vout: 1.8V Iout: 4.5A max., worst case load transient is from 3A to 4.5A ΔVout: Vin, ripple 1.5% of Vout (27mV) for worst case load transient 1.5% of Vin (50mV, p-p) Vin+ VIN Vout+ VOUT SENSE RTUNE + MODULE CI1 CI2 CTUNE Q3 ON/OFF GND CO1 TRIM RTrim CIN1 2 x 22μF/6.3V ceramic capacitor CIN2 47μF/6.3V bulk electrolytic CO1 CTune RTune 5 x 47μF/6.3V ceramic capacitor (e.g. Murata GRM31CR60J476ME19) 47nF ceramic capacitor (can be 1206, 0805 or 0603 size) 33 ohms SMT resistor (can be 1206, 0805 or 0603 size) RTrim 1kΩ SMT resistor (can be 1206, 0805 or 0603 size, recommended tolerance of 0.1%) LINEAGE POWER 18 Pico TLynxTM 6A: Non-isolated DC-DC Power Modules 2.4 – 5.5Vdc input; 0.6Vdc to 3.63Vdc output; 6A output current Data Sheet May 20, 2009 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.) PIN 10 PIN 7 LINEAGE POWER PIN FUNCTION 1 ON/OFF 2 VIN 3 GND 4 VOUT 5 SENSE 6 TRIM 7 GND 8 NC 9 SEQ 10 NC PIN 8 19 Data Sheet May 20, 2009 Pico TLynxTM 6A: Non-isolated DC-DC Power Modules 2.4 – 5.5Vdc input; 0.6Vdc 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.) PIN 10 PIN 8 LINEAGE POWER PIN 7 PIN FUNCTION 1 ON/OFF 2 VIN 3 GND 4 VOUT 5 SENSE 6 TRIM 7 GND 8 NC 9 SEQ 10 NC 20 Data Sheet May 20, 2009 Pico TLynxTM 6A: Non-isolated DC-DC Power Modules 2.4 – 5.5Vdc input; 0.6Vdc to 3.63Vdc output; 6A output current Packaging Details The Pico TLynxTM 6A modules 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: Tape Width: LINEAGE POWER 330.2 mm (13.00) 177.8 mm (7.00”) 24.00 mm (0.945”) 21 Pico TLynxTM 6A: Non-isolated DC-DC Power Modules 2.4 – 5.5Vdc input; 0.6Vdc to 3.63Vdc output; 6A output current Surface Mount Information Pick and Place TM The Pico TLynx 6A 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 place operations. The label meets all the requirements for surface mount processing, as well as safety standards, and is able to withstand reflow o temperatures of up to 300 C. The label also carries product information such as product code, serial number and the location of manufacture. Nozzle Recommendations The module weight has been kept to a minimum by using open frame construction. Variables such as nozzle size, tip style, vacuum pressure and placement speed should be considered to optimize this process. The minimum recommended inside nozzle diameter for reliable operation is 3mm. The maximum nozzle outer diameter, which will safely fit within the allowable component spacing, is 7 mm. Lead Free Soldering 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. 300 Per J-STD-020 Rev. C Peak Temp 260°C 250 Reflow Temp (°C) Data Sheet May 20, 2009 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 47. Recommended linear reflow profile using Sn/Ag/Cu solder. TM The Pico TLynx 6A modules are lead-free (Pb-free) and RoHS compliant and fully compatible in a Pb-free 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 Fig. 47. Soldering outside of the recommended profile requires testing to verify results and performance. 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 Modules: Soldering and Cleaning Application Note (AN04-001). MSL Rating The Pico TLynxTM 6A modules have a MSL rating of 2. 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 LINEAGE POWER 22 Pico TLynxTM 6A: Non-isolated DC-DC Power Modules 2.4 – 5.5Vdc input; 0.6Vdc to 3.63Vdc output; 6A output current Data Sheet May 20, 2009 Ordering Information Please contact your Lineage Power Sales Representative for pricing, availability and optional features. Table 6. Device Codes Device Code Input Voltage Range Output Voltage Output Current On/Off Logic Sequencing APXH006A0X-SRZ 2.4 – 5.5Vdc 0.6 – 3.63Vdc 6A Negative No CC109113354 APXH006A0X4-SRZ 2.4 – 5.5Vdc 0.6 – 3.63Vdc 6A Positive No CC109113362 APTH006A0X-SRZ 2.4 – 5.5Vdc 0.6 – 3.63Vdc 6A Negative Yes CC109113370 APTH006A0X4-SRZ 2.4 – 5.5Vdc 0.6 – 3.63Vdc 6A Positive Yes CC109113387 APTH006A0X-SR 2.4 – 5.5Vdc 0.6 – 3.63Vdc 6A Negative Yes CC109144993 TLynx Sequencing Input voltage Output Output voltage family feature. range current On/Off logic Options ROHS Compliance 4 -SR Z Comcodes -Z refers to RoHS-compliant parts Table 7. Coding Scheme AP T S 006A0 T = with Seq. H = 2.4 – 5.5V X = w/o Seq. 6.0A X X= 4 = positive programmable No entry = output negative S = Surface Mount Z = ROHS6 R = Tape&Reel 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: +49 898 780 672 80 India Headquarters Tel: +91 80 28411633 Lineage Power reserves the right to m ake changes to t he product(s) or inf ormation 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 Pow er C orporation, (Mesquite, Texas) All I nternational Rights Res erved. LINEAGE POWER 23 Document No: DS06-132 ver. 1.06 PDF name: APTH006A0X_ds.pdf