Data Sheet October 8, 2009 Pico TLynxTM 3A: Non-Isolated DC-DC Power Modules 2.4 – 5.5Vdc input; 0.6Vdc to 3.63Vdc output; 3A Output Current Features 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 LoopTM to optimize dynamic output voltage response Flexible output voltage sequencing EZSEQUENCE – APTH versions Remote sense Fixed switching frequency TM Applications Distributed power architectures Output overcurrent protection (non-latching) Intermediate bus voltage applications Overtemperature protection Telecommunications equipment Remote On/Off Servers and storage applications Ability to sink and source current Networking equipment Cost efficient open frame design Industrial equipment Small size: 12.2 mm x 12.2 mm x 6.25 mm Vin+ VIN MODULE RTUNE SEQ Cin CTUNE Q1 ON/OFF GND (0.48 in x 0.48 in x 0.25 in) Vout+ VOUT SENSE Co TRIM 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 RTrim Description The Pico TLynxTM 3A power modules are non-isolated dc-dc converters that can deliver up to 3A 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: DS06-131 ver. 1.11 PDF name: APTH003A0X_ds.pdf Data Sheet October 8, 2009 Pico TLynxTM 3A: Non-isolated DC-DC Power Modules 2.4 – 5.5Vdc input; 0.6Vdc to 3.63Vdc output; 3A 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 Operating Input Voltage All VIN 2.4 ⎯ 5.5 Vdc Maximum Input Current All IIN,max 3.5 Adc VO,set = 0.6 Vdc IIN,No load 26 mA VO,set = 3.3Vdc IIN,No load 75 mA All IIN,stand-by 2.1 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 Input Ripple Rejection (120Hz) All 40 (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 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 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 5A (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 3A: Non-isolated DC-DC Power Modules 2.4 – 5.5Vdc input; 0.6Vdc to 3.63Vdc output; 3A output current Data Sheet October 8, 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 ⎯ 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 External Capacitance 0.4 % VO, set 0.5 V 20 35 mVpk-pk 15 25 mVrms 1 Without the Tunable Loop TM ESR ≥ 1 mΩ With the Tunable Loop All CO, max 0 ⎯ 47 μF TM ESR ≥ 0.15 mΩ All CO, max 0 ⎯ 1000 μF ESR ≥ 10 mΩ All CO, max 0 ⎯ 3000 μF 0 Output Current All Io Output Current Limit Inception (Hiccup Mode ) All IO, lim Output Short-Circuit Current All IO, s/c 3 Adc 200 % Io,max 0.12 Adc (VO≤250mV) ( Hiccup Mode ) Efficiency VIN= 3.3Vdc, TA=25°C IO=IO, max , VO= VO,set VO,set = 0.6Vdc η 81.2 % VO, set = 1.2Vdc η 89.4 % VO,set = 1.8Vdc η 91.4 % VO,set = 2.5Vdc η 93.9 % VO,set = 3.3Vdc η 94.4 All fsw Peak Deviation All Vpk 90 mV Settling Time (Vo<10% peak deviation) All ts 20 μs Peak Deviation All Vpk 100 mV Settling Time (Vo<10% peak deviation) All ts 20 μs VIN= 5Vdc Switching Frequency ⎯ 600 % ⎯ kHz Dynamic Load Response (dIo/dt=10A/μs; VIN = 5V; Vout = 1.5V, TA=25°C) Load Change from Io= 0% to 50% of Io,max; Co = 0 Load Change from Io= 50% to 0% of Io,max: Co = 0 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 3A: Non-isolated DC-DC Power Modules 2.4 – 5.5Vdc input; 0.6Vdc to 3.63Vdc output; 3A output current Data Sheet October 8, 2009 General Specifications Parameter Calculated MTBF (IO=0.8IO, max, TA=40°C) Telcordia Issue 2 Method 1 Case 3 Weight Min Typ Max Unit 16,139,760 Hours 1.55 (0.0546) ⎯ 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 Device Symbol Input High Current All IIH Input High Voltage All VIH Min Typ Max Units ⎯ 10 µA ⎯ VIN,max V On/Off Signal Interface (VIN=VIN, min to VIN, max ; open collector or equivalent, Signal referenced to GND) Device is with suffix “4” – Positive Logic (See Ordering Information) Logic High (Module ON) 1.2 Logic Low (Module OFF) Input Low Current All IIL ⎯ ⎯ 0.3 mA Input Low Voltage All VIL -0.3 ⎯ 0.3 V Input High Current All IIH ― ― 1 mA Input High Voltage All VIH VIN – 0.8 ― VIN, max Vdc 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) 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, 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 APTH TsEQ-delay (Power-Up: 2V/ms) APTH VSEQ –Vo 100 mV (Power-Down: 2V/ms) 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 10 msec (VIN, min to VIN, max; IO, min to IO, max VSEQ < Vo) LINEAGE POWER 4 Data Sheet October 8, 2009 Pico TLynxTM 3A: Non-isolated DC-DC Power Modules 2.4 – 5.5Vdc input; 0.6Vdc to 3.63Vdc output; 3A output current Feature Specifications (cont.) Parameter Device Symbol Min Typ Max Units 2.2 Vdc Input Undervoltage Lockout Turn-on Threshold All Turn-off Threshold All 1.75 Hysteresis All 0.08 LINEAGE POWER Vdc 0.2 Vdc 5 Pico TLynxTM 3A: Non-isolated DC-DC Power Modules 2.4 – 5.5Vdc input; 0.6Vdc to 3.63Vdc output; 3A output current Data Sheet October 8, 2009 Characteristic Curves The following figures provide typical characteristics for the Pico TLynxTM 3A modules at 0.6Vo and at 25oC. 3.5 84 3 OUTPUT CURRENT, Io (A) 86 EFFICIENCY, η (%) 82 80 Vin=3.3V 78 Vin=2.4V Vin=5.5V 76 74 72 70 0 0.5 1 1.5 2 2.5 3 LINEAGE POWER 0 LFM 0 20 30 40 50 60 70 80 90 VO (V) (100mV/div) IO (A) (1Adiv) OUTPUT CURRENT, OUTPUT VOLTAGE Figure 5. Typical Start-up Using On/Off Voltage (Io = Io,max). 0.5 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) 1 Figure 2. Derating Output Current versus Ambient Temperature and Airflow. VIN (V) (2V/div) OUTPUT VOLTAGE ON/OFF VOLTAGE Figure 3. Typical output ripple and noise (VIN = 5V, Io = Io,max). 1.5 AMBIENT TEMPERATURE, TA C INPUT VOLTAGE VO (V) (20mV/div) OUTPUT VOLTAGE TIME, t (1μs/div) 2 O OUTPUT CURRENT, IO (A) Figure 1. Converter Efficiency versus Output Current. 2.5 TIME, t (1ms/div) Figure 6. Typical Start-up Using Input Voltage (VIN = 5V, Io = Io,max). 6 Pico TLynxTM 3A: Non-isolated DC-DC Power Modules 2.4 – 5.5Vdc input; 0.6Vdc to 3.63Vdc output; 3A output current Data Sheet October 8, 2009 Characteristic Curves (continued) The following figures provide typical characteristics for the Pico TLynxTM 3A modules at 1.2Vo and at 25oC. 95 3.5 3 85 Vin=5.5V Vin=3.3V 80 OUTPUT CURRENT, Io (A) EFFICIENCY, η (%) 90 Vin=2.4V 75 70 0 0.5 1 1.5 2 2.5 3 LINEAGE POWER 0 LFM 0 20 30 40 50 60 70 80 90 VO (V) (100mV/div) IO (A) (1Adiv) OUTPUT CURRENT, OUTPUT VOLTAGE Figure 11. Typical Start-up Using On/Off Voltage (Io = Io,max). 0.5 TIME, t (20μs /div) VO (V) (500mV/div) Figure 10. 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) 1 Figure 8. Derating Output Current versus Ambient Temperature and Airflow. VIN (V) (2V/div) OUTPUT VOLTAGE ON/OFF VOLTAGE Figure 9. Typical output ripple and noise (VIN = 5V, Io = Io,max). 1.5 AMBIENT TEMPERATURE, TA C INPUT VOLTAGE VO (V) (20mV/div) OUTPUT VOLTAGE TIME, t (1μs/div) 2 O OUTPUT CURRENT, IO (A) Figure 7. Converter Efficiency versus Output Current. 2.5 TIME, t (1ms/div) Figure 12. Typical Start-up Using Input Voltage (VIN = 5V, Io = Io,max). 7 Pico TLynxTM 3A: Non-isolated DC-DC Power Modules 2.4 – 5.5Vdc input; 0.6Vdc to 3.63Vdc output; 3A output current Data Sheet October 8, 2009 Characteristic Curves (continued) The following figures provide typical characteristics for the Pico TLynxTM 3A modules at 1.8Vo and at 25oC. 95 3.5 3 Vin=3.3V 85 OUTPUT CURRENT, Io (A) EFFICIENCY, η (%) 90 Vin=5.5V Vin=2.4V 80 75 70 0 0.5 1 1.5 2 2.5 3 LINEAGE POWER 0 LFM 0 20 30 40 50 60 70 80 90 VO (V) (200mV/div) IO (A) (2Adiv) OUTPUT CURRENT, OUTPUT VOLTAGE Figure 17. Typical Start-up Using On/Off Voltage (Io = Io,max). 0.5 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) 1 Figure 14. Derating Output Current versus Ambient Temperature and Airflow. VIN (V) (2V/div) OUTPUT VOLTAGE ON/OFF VOLTAGE Figure 15. Typical output ripple and noise (VIN = 5V, Io = Io,max). 1.5 AMBIENT TEMPERATURE, TA C INPUT VOLTAGE VO (V) (20mV/div) OUTPUT VOLTAGE TIME, t (1μs/div) 2 O OUTPUT CURRENT, IO (A) Figure 13. Converter Efficiency versus Output Current. 2.5 TIME, t (1ms/div) Figure 18. Typical Start-up Using Input Voltage (VIN = 5V, Io = Io,max). 8 Pico TLynxTM 3A: Non-isolated DC-DC Power Modules 2.4 – 5.5Vdc input; 0.6Vdc to 3.63Vdc output; 3A output current Data Sheet October 8, 2009 Characteristic Curves (continued) 100 3.5 95 3 OUTPUT CURRENT, Io (A) EFFICIENCY, η (%) The following figures provide typical characteristics for the Pico TLynxTM 3A modules at 2.5Vo and at 25oC. 90 Vin=5.5V Vin=3.3V 85 Vin=3V 80 75 70 0 0.5 1 1.5 2 2.5 3 LINEAGE POWER 0 LFM 0 20 30 40 50 60 70 80 90 VO (V) (200mV/div) IO (A) (2Adiv) OUTPUT CURRENT, OUTPUT VOLTAGE Figure 23. Typical Start-up Using On/Off Voltage (Io = Io,max). 0.5 TIME, t (20μs /div) VO (V) (1V/div) Figure 22. Transient Response to Dynamic Load Change from 0% to 50% to 0% with VIN=5V. OUTPUT VOLTAGE VO (V) (1V/div) VON/OFF (V) (5V/div) TIME, t (1ms/div) 1 Figure 20. Derating Output Current versus Ambient Temperature and Airflow. VIN (V) (2V/div) OUTPUT VOLTAGE ON/OFF VOLTAGE Figure 21. Typical output ripple and noise (VIN = 5V, Io = Io,max). 1.5 AMBIENT TEMPERATURE, TA C INPUT VOLTAGE VO (V) (20mV/div) OUTPUT VOLTAGE TIME, t (1μs/div) 2 O OUTPUT CURRENT, IO (A) Figure 19. Converter Efficiency versus Output Current. 2.5 TIME, t (1ms/div) Figure 24. Typical Start-up Using Input Voltage (VIN = 5V, Io = Io,max). 9 Pico TLynxTM 3A: Non-isolated DC-DC Power Modules 2.4 – 5.5Vdc input; 0.6Vdc to 3.63Vdc output; 3A output current Data Sheet October 8, 2009 Characteristic Curves (continued) 100 3.5 95 3 90 OUTPUT CURRENT, Io (A) EFFICIENCY, η (%) The following figures provide typical characteristics for the Pico TLynxTM 3A modules at 3.3Vo and at 25oC. Vin=5.5V Vin=5V 85 Vin=4V 80 75 70 0 0.5 1 1.5 2 2.5 3 LINEAGE POWER 0 LFM 0 20 30 40 50 60 70 80 90 VO (V) (200mV/div) IO (A) (1Adiv) OUTPUT CURRENT, OUTPUT VOLTAGE Figure 29. Typical Start-up Using On/Off Voltage (Io = Io,max). 0.5 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) 1 Figure 26. Derating Output Current versus Ambient Temperature and Airflow. VIN (V) (2V/div) OUTPUT VOLTAGE ON/OFF VOLTAGE Figure 27. Typical output ripple and noise (VIN = 5V, Io = Io,max). 1.5 AMBIENT TEMPERATURE, TA C INPUT VOLTAGE VO (V) (20mV/div) OUTPUT VOLTAGE TIME, t (1μs/div) 2 O OUTPUT CURRENT, IO (A) Figure 25. Converter Efficiency versus Output Current. 2.5 TIME, t (1ms/div) Figure 30. Typical Start-up Using Input Voltage (VIN = 5V, Io = Io,max). 10 Pico TLynxTM 3A: Non-isolated DC-DC Power Modules 2.4 – 5.5Vdc input; 0.6Vdc to 3.63Vdc output; 3A output current Data Sheet October 8, 2009 Design Considerations CURRENT PROBE LTEST VIN(+) BATTERY 1μH 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 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. Rdistribution Rcontact Rcontact VIN(+) Rdistribution RLOAD VO Rcontact Rcontact COM 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 % The Pico TLynxTM 3A module 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. To minimize input voltage ripple, low-ESR ceramic capacitors are recommended at the input of the module. Figure 34 shows the input ripple voltage for various output voltages at 3A 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. 60 50 40 30 20 1x22uF 10 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 (3A load). Input voltage is 5V. 60 Rdistribution VO VIN Input Filtering Input Ripple Voltage (mVp-p) TO OSCILLOSCOPE Input Ripple Voltage (mVp-p) Test Configurations 50 40 30 20 1x22uF 10 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 (3A load). Input voltage is 3.3V. 11 Data Sheet October 8, 2009 Pico TLynxTM 3A: Non-isolated DC-DC Power Modules 2.4 – 5.5Vdc input; 0.6Vdc to 3.63Vdc output; 3A output current 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 ceramic and polymer 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 3A 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 Loop feature described later in this data sheet. 15 Ripple(mVp-p) The Pico TLynxTM 3A modules are designed for low output ripple voltage and will meet the maximum output ripple specification with 0.1 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. 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 (3A 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. 60950-103, and VDE 0850:2001-12 (EN60950-1) Licensed. 30 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 5A in the positive input lead. Ripple(mVp-p) 25 20 1x10uF External Cap 1x47uF External cap 2x47uF External Cap 4x47uF external Cap 15 10 5 Feature Descriptions 0 0.5 1 1.5 2 2.5 Output Voltage(Volts) 3 3.5 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 (3A load). Input voltage is 5V. Remote On/Off The Pico TLynxTM 3A 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 LINEAGE POWER 12 Pico TLynxTM 3A: Non-isolated DC-DC Power Modules 2.4 – 5.5Vdc input; 0.6Vdc to 3.63Vdc output; 3A output current Data Sheet October 8, 2009 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 Overtemperature Protection To provide protection in a fault condition, the unit is equipped with a thermal shutdown circuit. The unit will o shutdown if the overtemperature threshold of 140 C 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. Q2 Input Undervoltage Lockout + VON/OFF unit enters hiccup mode. The unit operates normally once the output current is brought back into its specified range. 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. 20K _ GND Output Voltage Programming 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. The output voltage of the Pico TLynxTM 3A modules 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. 6 VIN+ Rpullup 100K I ON/OFF ON/OFF + VON/OFF Q1 GND 2.05K PWM Enable Upper Limit 4 3 Lower Limit 2 1 0 20K _ Figure 39. Circuit configuration for using negative On/Off logic. 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 LINEAGE POWER Input Voltage (v) 5 MODULE 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 ) ⎦ 13 Pico TLynxTM 3A: Non-isolated DC-DC Power Modules 2.4 – 5.5Vdc input; 0.6Vdc to 3.63Vdc output; 3A output current Data Sheet October 8, 2009 Rtrim is the external resistor in kΩ Vo is the desired output voltage. 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 resistor, Rmargin-down, from the Trim pin to 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. Vo Rmargin-down MODULE Q2 Trim 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. Rmargin-up Rtrim Q1 GND VIN + VO+ Figure 42. Circuit Configuration for margining Output voltage SENSE ON/OFF TRIM LOAD Rtrim GND Figure 41. Circuit configuration for programming output voltage using an external resistor. Remote Sense The Pico TLynxTM 3A 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. Voltage Margining Output voltage margining can be implemented in the Pico TLynxTM 3A 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 LINEAGE POWER Monotonic Start-up and Shutdown The Pico TLynxTM 3A modules have monotonic startup and shutdown behavior for any combination of rated input voltage, output current and operating temperature range. Startup into Pre-biased Output The 5.5V Pico TLynxTM 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 Pico TLynxTM 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 14 Pico TLynxTM 3A: Non-isolated DC-DC Power Modules 2.4 – 5.5Vdc input; 0.6Vdc to 3.63Vdc output; 3A output current Data Sheet October 8, 2009 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 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 op-amp 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 = 24950 ohms, V IN − 0.05 the voltage at the sequencing pin will be 50mV when the sequencing signal is at zero. MODULE VIN+ 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. TM When using the EZ-SEQUENCE feature to control start-up of the module, pre-bias immunity during start- LINEAGE POWER 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 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 EZSEQUENCETM feature must be disabled. For TM additional guidelines on using the EZ-SEQUENCE 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 Loop The 5V Pico TLynxTM 3A modules have a new feature that optimizes transient response of the module called Tunable LoopTM. 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. TM The Tunable Loop allows the user to externally adjust the voltage control loop to match the filter network connected to the output of the module. The Tunable 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 RTUNE MODULE CO CTUNE TRIM GND RTrim Figure. 44. Circuit diagram showing connection of RTUME and CTUNE to tune the control loop of the module. 15 Pico TLynxTM 3A: Non-isolated DC-DC Power Modules 2.4 – 5.5Vdc input; 0.6Vdc to 3.63Vdc output; 3A output current Data Sheet October 8, 2009 Recommended values of RTUNE and CTUNE for different output capacitor combinations are given in Tables 2, 3, 4 and 5. Tables 2 and 4 show the recommended values of RTUNE and CTUNE for different values of ceramic output capacitors up to 470uF that might be needed for an application to meet output ripple and noise requirements for 5Vin and 3.3Vin respectively. Selecting RTUNE and CTUNE according to Table 2 will ensure stable operation of the module. In applications with tight output voltage limits in the presence of dynamic current loading, additional output capacitance will be required. Tables 3 and 5 list 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 1.5A to 3A step change (50% of full load), with an input voltage of 5Vin and 3.3Vin respectively Table 5. Recommended values of RTUNE and CTUNE to obtain transient deviation of ≤2% of Vout for a 1.5A step load with Vin=3.3V. Vo Co RTUNE 2.5V 1.8V 1.2V 33 2 x 47μF 2 x 47μF 4 x 47μF 33 33 0.6V 4 x 47μF +330μF Polymer 33 CTUNE 22nF 27nF 47nF 150nF ΔV 46mV 32mV 24mV 12mV 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 3.3 or 5V. Table 2. General recommended values of of RTUNE and CTUNE for Vin=5V and various external ceramic capacitor combinations. Co RTUNE 1x47μF 2x47μF 4x47μF 6x47μF 10x47μF 33 CTUNE 6800pF 33 33 33 33 15nF 33nF 47nF 56nF Table 3. Recommended values of RTUNE and CTUNE to obtain transient deviation of ≤2% of Vout for a 1.5A step load with Vin=5V. Vo 3.3V Co 1x 47μF RTUNE 33 2.5V 59mV 1.2V 0.6V 33 33 33 2 x 47μF +330μF Polymer 33 15nF 15nF 33nF 82nF 35mV 35mV 21mV 12mV 2x 47μF CTUNE 6800pF ΔV 1.8V 2x 47μF 4x 47μF Table 4. General recommended values of of RTUNE and CTUNE for Vin=3.3V and various external ceramic capacitor combinations. Co 1x47μF 2x47μF 4x47μF 6x47μF 10x47μF RTUNE 33 33 33 33 33 CTUNE 15nF 27nF 47nF 56nF 68nF LINEAGE POWER 16 Pico TLynxTM 3A: Non-isolated DC-DC Power Modules 2.4 – 5.5Vdc input; 0.6Vdc to 3.63Vdc output; 3A output current Data Sheet October 8, 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 shown 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 shown in Figure 46. 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 3A: Non-isolated DC-DC Power Modules 2.4 – 5.5Vdc input; 0.6Vdc to 3.63Vdc output; 3A output current Data Sheet October 8, 2009 Example Application Circuit Requirements: Vin: Vout: Iout: 3.3V 1.8V 2.25A max., worst case load transient is from 1.5A to 2.25A 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 CI1 22μF/6.3V ceramic capacitor CI2 47μF/6.3V bulk electrolytic CO1 CTune RTune 2 x 47μF/6.3V ceramic capacitor (e.g. Murata GRM31CR60J476ME19) 27nF 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 Data Sheet October 8, 2009 Pico TLynxTM 3A: Non-isolated DC-DC Power Modules 2.4 – 5.5Vdc input; 0.6Vdc to 3.63Vdc output; 3A 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.) 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 October 8, 2009 Pico TLynxTM 3A: Non-isolated DC-DC Power Modules 2.4 – 5.5Vdc input; 0.6Vdc to 3.63Vdc output; 3A 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 October 8, 2009 Pico TLynxTM 3A: Non-isolated DC-DC Power Modules 2.4 – 5.5Vdc input; 0.6Vdc to 3.63Vdc output; 3A output current Packaging Details The Pico TLynxTM 3A 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 3A: Non-isolated DC-DC Power Modules 2.4 – 5.5Vdc input; 0.6Vdc to 3.63Vdc output; 3A output current Surface Mount Information Pick and Place The Pico TLynxTM 3A 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 The Pico TLynxTM 3A 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 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 October 8, 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. 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). 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. MSL Rating The Pico TLynxTM 3A 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 Sensitive Surface Mount Devices). Moisture barrier bags (MBB) with desiccant are required for MSL ratings of 2 or greater. These sealed packages should LINEAGE POWER 22 Pico TLynxTM 3A: Non-isolated DC-DC Power Modules 2.4 – 5.5Vdc input; 0.6Vdc to 3.63Vdc output; 3A output current Data Sheet October 8, 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 APXH003A0X-SRZ 2.4 – 5.5Vdc 0.6 – 3.63Vdc 3A Negative No CC109113313 APXH003A0X4-SRZ 2.4 – 5.5Vdc 0.6 – 3.63Vdc 3A Positive No CC109113321 APTH003A0X-SRZ 2.4 – 5.5Vdc 0.6 – 3.63Vdc 3A Negative Yes CC109113338 APTH003A0X4-SRZ 2.4 – 5.5Vdc 0.6 – 3.63Vdc 3A Positive Yes CC109113346 APTH003A0X-SR 2.4 – 5.5Vdc 0.6 – 3.63Vdc 3A Negative Yes CC109147484 TLynx Sequencing Input voltage Output Output voltage family feature. range current On/Off logic Options ROHS Compliance 4 -SR Z Comcodes Table 7. Coding Scheme AP T H T = with Seq. H = 2.4 – 5.5V X = w/o Seq. 003A0 3.0A X X= 4 = positive programmable No entry = output negative S = Surface Mount Z = ROHS6 R = Tape&Reel Asia-Pacific Headquarters Tel: +65 6593 7211 World Wide Headquarters Lineage Power Corporation 601 Shiloh Road, Plano, TX 75074, USA +1-800-526-7819 (Outside U.S.A.: +1-972-244-9428) 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 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. Lineage Power DC-DC products are protected under various patents. Information on these patents is available at www.lineagepower.com/patents. © 2009 Lineage Power Corporation, (Plano, Texas) All International Rights Reserved. LINEAGE POWER 23 Document No: DS06-131 ver. 1.11 PDF name: APTH003A0X_ds.pdf