PTN04050C www.ti.com SLTS251 – SEPTEMBER 2005 12-W, 3.3/5-V INPUT, WIDE OUTPUT ADJUSTABLE BOOST CONVERTER FEATURES APPLICATIONS • • • • • • • Up to 12 W Output Power Wide Input Voltage Range (2.95 V to 5.5 V) Wide Output Voltage Adjust (5 V to 15 V) High Efficiency (Up to 90%) Operating Temperature: –40°C to 85°C Surface Mount Package Available Telecommunications, Instrumentation, and General-Purpose Applications DESCRIPTION The PTN04050C is a 4-pin boost-voltage regulator product. In new designs it should be considered in place of the PT5040 series of positive step-up products. The PTN04050C is smaller and lighter than its predecessors, and has either similar or improved electrical performance characteristics. The case-less, double-sided package, also exhibits improved thermal characteristics, and is compatible with TI's roadmap for RoHS and lead-free compliance. Operating over a 2.95 V to 5.5 V input range, the PTN04050C provides high-efficiency, step-up voltage conversion for loads of up to 12 W. The output voltage is set using a single external resistor. The PTN04050C may be set to any value within the range, 5 V to 15 V. The output voltage of the PTN04050C can be as little as 0.5 V higher than the input, allowing an output voltage of 5 V, with an input voltage of 4.5 V. The PTN04050C modules are suited to a wide variety of general-purpose applications that operate off 3.3-V or 5-V dc power. STANDARD APPLICATION VI 1 2 4 PTN04050C (Top View) 3 CI* 100 mF Electrolytic (Required) VO RSET# 0.1 W, 1% (Required) GND CO* 100 mF Electrolytic (Required) GND * See the Application Information section for capacitor recommendations. # See the Application Information section for RSET values. Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet. PRODUCTION DATA information is current as of publication date. Products conform to specifications per the terms of the Texas Instruments standard warranty. Production processing does not necessarily include testing of all parameters. Copyright © 2005, Texas Instruments Incorporated PTN04050C www.ti.com SLTS251 – SEPTEMBER 2005 These devices have limited built-in ESD protection. The leads should be shorted together or the device placed in conductive foam during storage or handling to prevent electrostatic damage to the MOS gates. ORDERING INFORMATION PTN04050C (Base Part Number) Output Voltage Range 5 V – 15 V (Adjustable) (1) (2) (3) (4) (1) DESCRIPTION PTN04050CAH Horizontal T/H Part Number Pb – free and RoHS Yes Mechanical Package (2) (3) PTN04050CAS Horizontal SMD No (4) PTN04050CAZ Horizontal SMD Yes (3) EUU EUV EUV Add T to end of part number for tape and reel on SMD packages only. Reference the applicable package reference drawing for the dimensions and PC board layout. Lead (Pb) – free option specifies Sn/Ag pin solder material. Standard option specifies 63/37, Sn/Pb pin solder material. ABSOLUTE MAXIMUM RATINGS (1) over operating free-air temperature range unless otherwise noted all voltages with respect to GND (pin 1), UNIT TA Operating free-air temperature Over VI range Leaded temperature (H suffix) 5 seconds Solder reflow temperature (S suffix) Surface temperature of module body or pins 235°C Solder reflow temperature (Z suffix) (3) Surface temperature of module body or pins 260°C (3) Tstg Storage temperature PO Output power (1) (2) (3) –40°C to 85°C 260°C (2) –40°C to 125°C 12 W Stresses beyond those listed under absolute maximum ratings may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated under recommended operating conditions is not implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability. This model is NOT compatible with surface-mount reflow solder process. Moisture Sensitivity Level (MSL) Rating Level-3-260C-168HR RECOMMENDED OPERATING CONDITIONS MIN MAX VI Input voltage 2.95 5.5 UNIT V TA Operating free-air temperature –40 85 °C PACKAGE SPECIFICATIONS PTN04050Cx (Suffix AH, AS, and AZ) Weight 2.8 grams Flammability Meets UL 94 V-O Mechanical shock Per Mil-STD-883D, Method 2002.3, 1 ms, ? sine, mounted Mechanical vibration Mil-STD-883D, Method 2007.2, 20-2000 Hz (1) 2 Qualification limit. 500 G (1) Horizontal T/H (suffix AH) 20 G (1) Horizontal SMD (suffix AS and AZ) 15 G (1) PTN04050C www.ti.com SLTS251 – SEPTEMBER 2005 ELECTRICAL CHARACTERISTICS operating at 25°C free-air temperature, VI = 5 V, VO = 12 V, IO = IO (max), CI = 100 µF, CO = 100 µF (unless otherwise noted) PARAMETER TEST CONDITIONS PTN04050C MIN IO VI VO η Output current Input voltage range Over VI Range TYP MAX VO = 15 V 0.1 (1) 0.8 VO = 12 V 0.1 (1) 1.0 VO = 9 V 0.1 (1) 1.3 VO = 5 V 0.1 (1) Over IO range UNIT A 2.4 2.95 5.5 (2) V ±2 (3) %VO Set-point voltage tolerance TA = 25°C Temperature variation –40°C to 85°C Line regulation Over VI range ±0.5 %VO Load regulation Over IO range ±0.5 %VO Total Output Voltage Variation Includes set point, line, load –40°C < TA < 85°C Efficiency Output voltage ripple (peak-to-peak) ±0.5 %VO ±3 VI = 5 V, RSET = 60.4 Ω, VO = 15 V 88 VI = 5 V, RSET = 1.33 kΩ, VO = 12 V 89 VI = 5 V, RSET = 4.53 kΩ, VO = 9 V 90 VI = 3.3 V, RSET = OPEN, VO = 5 V 87 20-MHz bandwith (3) %VO % 1.5 3 %VO 1 A/µs load step from 50% to 100% IOmax Transient response Recovery time VO over/undershoot Ilim Current limit Iir Inrush current tir Inrush current time duration FS Switching frequency CI External input capacitance External output capacitance Calculated reliability %VO %IOmax 2 (5) A 1 Over VI and IO ranges 450 Per Telcordia SR-332, 50% stress, TA = 40°C, ground benign 525 ms 600 (6) 100 (7) 560 (8) 0 100 (9) 10 kHz µF 100 Ceramic Equivalent series resistance (nonceramic) MTBF 2.5 150 (4) Nonceramic CO µs 500 µF (10) mΩ 8.9 106 Hr (1) (2) (3) Operation at no load is not recommended. The maximum VI is 5.5 V. An input voltage of 5.2 V or less, produces a regulated 5-V output. The set-point voltage tolerance is affected by the tolerance and stability of RSET. The stated limit is unconditionally met if RSET has a tolerance of 1% with 100 ppm/°C or better temperature stability. (4) Boost-topology switching regulators are not short-circuit protected. (5) The inrush current stated is in addition to the normal input current for the associated output load. (6) An external input capacitor is required across the input (VI and GND) for proper operation. See the application information for further guidance. (7) An external output capacitance is required for proper operation. See the application information for further guidance. (8) The minimum ESR limitation may result in a lower value for the output capacitance. See the application information for further guidance. (9) When using ceramic capacitors equivalent to 100 µF, a 100 µF bulk electrolytic is also required. (10) This is the minimum ESR for all the electrolytic (nonceramic) output capacitance. Use 17 mΩ as the minimum when using maximum ESR values to calculate. 3 PTN04050C www.ti.com SLTS251 – SEPTEMBER 2005 PIN ASSIGNMENT 4 1 2 PTN04050C (Top View) 3 TERMINAL FUNCTIONS TERMINAL NAME NO. I/O DESCRIPTION This is the common ground connection for the VI and VO power connections. It is also the 0 Vdc reference for the VO Adjust control input. GND 1 I/O VI 2 I The positive input voltage power node to the module, which is referenced to common GND. VO Adjust 3 I A 1% resistor must be connected between this pin and GND (pin 1) to set the output voltage. If left open-circuit, the output voltage will default to its minimum adjust value. The temperature stability of the resistor should be 100 ppm/°C (or better). The set-point range is 5 V to 15 V. The standard resistor value for a number of common output voltages is provided in the application information. VO 4 O The regulated positive power output with respect to the GND node. 4 PTN04050C www.ti.com SLTS251 – SEPTEMBER 2005 TYPICAL CHARACTERISTICS (3.3-V INPUT) (1) (2) EFFICIENCY vs OUTPUT CURRENT OUTPUT VOLTAGE RIPPLE vs OUTPUT CURRENT 90 VO = 9 V VO = 12 V 80 VO = 15 V 70 VO = 15 V VO = 15 V 150 PD - Power Dissipation - W VO - Output Voltage Ripple - VPP (mV) VO = 5 V 120 VO = 9 V 90 VO = 12 V 60 VO = 5 V 30 VO = 9 V 1.2 0.8 0 0.8 0.4 1.6 1.2 2 2.4 0 0 0.8 0.4 IO - Output Current - A 1.2 1.6 2 2.4 0.8 0.4 1.2 1.6 2 Figure 2. Figure 3. TEMPERATURE DERATING vs OUTPUT CURRENT TEMPERATURE DERATING vs OUTPUT CURRENT TEMPERATURE DERATING vs OUTPUT CURRENT 80 Ambient Temperature - °C 90 Airflow: 70 200 LFM 60 100 LFM 50 60 LFM Nat conv 40 VO = 5 V 30 90 Airflow: 200 LFM 70 100 LFM 60 60 LFM 50 Nat conv 40 VO = 9 V 1 1.5 2 20 2.5 80 Airflow: 200 LFM 70 100 LFM 60 60 LFM 50 Nat conv 40 VO = 12 V 30 30 0.5 2.4 IO - Output Current - A Figure 1. 80 0 0 IO - Output Current - A 90 20 VO = 5 V 0.4 0 60 VO = 12 V 1.6 Ambient Temperature - °C Efficiency - % 2 180 100 Ambient Temperature - °C POWER DISSIPATION vs OUTPUT CURRENT 0 0.3 0.6 0.9 1.2 20 0 0.2 0.4 0.6 0.8 IO - Output Current - A IO - Output Current - A IO - Output Current - A Figure 4. Figure 5. Figure 6. 1 TEMPERATURE DERATING vs OUTPUT CURRENT Ambient Temperature - °C 90 80 Airflow: 200 LFM 70 100 LFM 60 60 LFM 50 Nat conv 40 VO = 15 V 30 20 0 0.2 0.4 0.6 0.8 IO - Output Current - A Figure 7. (1) (2) The electrical characteristic data has been developed from actual products tested at 25°C. This data is considered typical for the converter. Applies to Figure 1, Figure 2, and Figure 3. The Safe Operating Area curves represent the conditions at which internal components are at or below the manufacturer's maximum operating temperatures. Derating limits apply to modules soldered directly to a 100 mm x 100 mm double-sided PCB with 2 oz. copper. Applies to Figure 4, Figure 5, Figure 6, and Figure 7. 5 PTN04050C www.ti.com SLTS251 – SEPTEMBER 2005 TYPICAL CHARACTERISTICS (5-V INPUT) (1) (2) EFFICIENCY vs OUTPUT CURRENT OUTPUT VOLTAGE RIPPLE vs OUTPUT CURRENT VO = 12 V 80 VO = 15 V 70 0 0.2 0.4 0.8 0.6 1 60 VO = 9 V 30 VO = 12 V 1.2 0.9 0.6 VO = 9 V 0.3 0.2 0.4 0.8 0.6 1 1.2 0 0.2 0.4 0.8 0.6 1 1.2 IO - Output Current - A IO - Output Current - A IO - Output Current - A Figure 8. Figure 9. Figure 10. TEMPERATURE DERATING vs OUTPUT CURRENT TEMPERATURE DERATING vs OUTPUT CURRENT TEMPERATURE DERATING vs OUTPUT CURRENT 90 80 Airflow: Ambient Temperature - °C 200 LFM 70 100 LFM 60 LFM 60 Nat conv 50 40 VO = 9 V 30 80 Airflow: 200 LFM 70 100 LFM 60 60 LFM 50 Nat conv 40 VO = 12 V 30 0 VO = 15 V 1.5 0 0 90 80 Ambient Temperature - °C VO = 12 V 90 1.2 90 6 VO = 15 V 120 0 60 (2) 150 Ambient Temperature - °C Efficiency - % 90 VO - Output Voltage Ripple - VPP (mV) VO - Output Voltage Ripple - VPP (mV) VO = 9 V (1) 1.8 180 100 20 POWER DISSIPATION vs OUTPUT CURRENT 0.3 0.6 0.9 1.2 20 Airflow: 200 LFM 70 100 LFM 60 60 LFM 50 Nat conv 40 VO = 15 V 30 0 0.2 0.4 0.6 0.8 1 20 0 0.2 0.4 0.6 IO - Output Current - A IO - Output Current - A IO - Output Current - A Figure 11. Figure 12. Figure 13. 0.8 The electrical characteristic data has been developed from actual products tested at 25°C. This data is considered typical for the converter. Applies to Figure 8, Figure 9, and Figure 10. The Safe Operating Area curves represent the conditions at which internal components are at or below the manufacturer's maximum operating temperatures. Derating limits apply to modules soldered directly to a 100-mm x 100-mm, double-sided PCB with 2 oz. copper. Applies to Figure 11, Figure 12, and Figure 13. PTN04050C www.ti.com SLTS251 – SEPTEMBER 2005 APPLICATION INFORMATION Adjusting the Output Voltage of the PTN04050C Wide-Output Adjust Power Modules General A resistor must be connected between the VO Adjust control (pin 3) and GND (pin 1) to set the output voltage of the PTN04050C product. The adjustment range is from 5 V to 15 V. If pin 3 is left open, the output voltage defaults to the lowest value. Table 1 gives the standard resistor value for several common voltages, along with the actual output voltage that the value provides. For other output voltages, the value of the required resistor can be calculated using Equation 1. Alternatively, RSET can be simply selected from the range of values given in Table 2. Figure 14 shows the placement of the required resistor. RSET = 15 kW ´ 2V VO - 5 V - 2.94 kW (1) Table 1. Standard Values of RSET for Common Output Voltages VO (Required) VI RSET (Standard Value) VO (Actual) 5.0 V Open 5.00 V 9.0 V 4.53 kΩ 9.01 V 12.0 V 1.33 kΩ 12.03 V 15.0 V 60.4 Ω 14.99 V 2 PTN04050C VO VI 1 GND VO Adj GND CI 100 mF (Required) 4 3 RSET 0.01 W 1% CO 100 mF (Required) GND (1) A 0.05-W rated resistor may be used. The tolerance should be 1%, with a temperature stability of 100 ppm/°C (or better). Place the resistor as close to the regulator as possible. Connect the resistor directly between pins 3 and 1 using dedicated PCB traces. (2) Never connect capacitors from VO Adjust to GND or VO. Any capacitance added to the VO Adjust pin affects the stability of the regulator. Figure 14. PTN04050C VO Adjust Resistor Placement 7 PTN04050C www.ti.com SLTS251 – SEPTEMBER 2005 Table 2. PTN04050C Output Voltage Set-Point Resistor Values VO 8 RSET VO RSET VO RSET 5V Open 10 V 3.06 kΩ 12.6 V 1.01 kΩ 5.2 V 147 KΩ 10.1 V 2.94 kΩ 12.7 V 956 Ω 5.4 V 72 kΩ 10.2 V 2.83 kΩ 12.8 V 906 Ω 5.6 V 47 kΩ 10.3 V 2.72 kΩ 12.9 V 857 Ω 5.8 V 34.5 kΩ 10.4 V 2.62 kΩ 13 V 810 Ω 6V 27 kΩ 10.5 V 2.52 kΩ 13.1 V 764 Ω 6.2 V 22 kΩ 10.6 V 2.42 kΩ 13.2 V 719 Ω 6.4 V 18.5 kΩ 10.7 V 2.32 kΩ 13.3 V 674 Ω 6.6 V 15.8 kΩ 10.8 V 2.23 kΩ 13.4 V 631 Ω 6.8 V 13.7 kΩ 10.9 V 2.15 kΩ 13.5 V 589 Ω 7V 12 kΩ 11 V 2.06 kΩ 13.6 V 548 Ω 7.2 V 10.7 kΩ 11.1 V 1.98 kΩ 13.7 V 508 Ω 7.4 V 9.56 kΩ 11.2 V 1.89 kΩ 13.8 V 469 Ω 7.6 V 8.60 kΩ 11.3 V 1.82 kΩ 13.9 V 431 Ω 7.8 V 7.77 kΩ 11.4 V 1.75 kΩ 14 V 393 Ω 8V 7.06 kΩ 11.5 V 1.67 kΩ 14.1 V 357 Ω 8.2 V 6.44 kΩ 11.6 V 1.60 kΩ 14.2 V 321 Ω 8.4 V 5.88 kΩ 11.7 V 1.54 kΩ 14.3 V 286 Ω 8.6 V 5.39 kΩ 11.8 V 1.47 kΩ 14.4 V 251 Ω 8.8 V 4.95 kΩ 11.9 V 1.41 kΩ 14.5 V 218 Ω 9V 4.56 kΩ 12 V 1.35 kΩ 14.6 V 185 Ω 9.2 V 4.20 kΩ 12.1 V 1.29 kΩ 14.7 V 153 Ω 9.4 V 3.88 kΩ 12.2 V 1.23 kΩ 14.8 V 121 Ω 9.6 V 3.58 kΩ 12.3 V 1.17 kΩ 14.9 V 90 Ω 9.8 V 3.31 kΩ 12.4 V 1.11 kΩ 15 V 60 Ω 9.9 V 3.18 kΩ 12.5 V 1.06 kΩ PTN04050C www.ti.com SLTS251 – SEPTEMBER 2005 CAPACITOR RECOMMENDATIONS FOR PTN04050C WIDE-OUTPUT ADJUST POWER MODULES Input Capacitor The minimum required input capacitance is 100 µF. The minimum ripple current rating for any nonceramic capacitance must be greater than 250 mA rms. The ripple current rating of electrolytic capacitors is a major consideration when they are used at the input. This ripple current requirement can be reduced by placing ceramic capacitors at the input, in addition to the minimum required capacitance. When specifying regular tantalum capacitors for use at the input, a minimum voltage rating of 2 X (maximum dc voltage + ac ripple) is highly recommended. This is standard practice to ensure reliability. Polymer-tantalum capacitors are not affected by this requirement. (Please verify voltage derating for the polymer-tantalum capacitors from the vendors.) Output Capacitor The minimum capacitance required to insure stability is a 100 µF. A combination of both ceramic and electrolytic-type capacitors should be used. The minimum ripple current rating for the nonceramic capacitance must be at least 150 mA rms. When using ceramic capacitors equivalent to 100 µF, a 100 µF bulk electrolytic is also required. The stability of the module and voltage tolerances are compromised if the capacitor is not placed near the output pin. A high-quality, computer-grade electrolytic capacitor is adequate. Ceramic capacitance should also be located within 0.5 inches (1,27 cm) of the output pin. For applications with load transients (sudden changes in load current), the regulator response improves with additional capacitance. Additional electrolytic capacitors should be located close to the load circuit. These capacitors provide decoupling over the frequency range, 2 kHz to 150 kHz. Aluminum electrolytic capacitors are suitable for ambient temperatures above 0°C. For operation below 0°C, tantalum or Os-Con type capacitors are recommended. When using one or more nonceramic capacitors, the calculated equivalent ESR should be no lower than 10 mΩ (17 mΩ using the manufacturer's maximum ESR for a single capacitor). A list of capacitors and vendors are identified in Table 3, the recommended capacitor table. Ceramic Capacitors Above 150 kHz the performance of aluminum electrolytic capacitors becomes less effective. To further reduce the reflected input ripple current, or the output transient response, multilayer ceramic capacitors must be added. Ceramic capacitors have low ESR and their resonant frequency is higher than the bandwidth of the regulator. When placed at the output, their combined ESR is not critical as long as the total value of ceramic capacitance does not exceed 100 µF. Note: If only ceramics are used on the output bus, then a 100 µF electrolytic is required for stabilization. Tantalum Capacitors Tantalum type capacitors may be used at the output, and are recommended for applications where the ambient operating temperature can be less than 0°C. The AVX TPS, Sprague 593D/594/595, and Kemet T495/T510/T520 capacitors series are suggested over many other tantalum types due to their rated surge, power dissipation, and ripple current capability. As a caution, many general-purpose tantalum capacitors have considerably higher ESR, reduced power dissipation, and lower ripple current capability. These capacitors are also less reliable as they have lower power dissipation and surge current ratings. Tantalum capacitors that do not have a stated ESR or surge current rating are not recommended for power applications. When specifying Os-Con and polymer tantalum capacitors for the output, the minimum ESR limit is encountered well before the maximum capacitance value is reached. Capacitor Table The capacitor table, Table 3, identifies the characteristics of capacitors from various vendors with acceptable ESR and ripple current (rms) ratings. The recommended number of capacitors required at both the input and output buses is identified for each capacitor type. This is not an extensive capacitor list. Capacitors from other vendors are available with comparable specifications. Those listed are for guidance. The rms current rating and ESR (at 100 kHz) are critical parameters necessary to insure both optimum regulator performance and long capacitor life. 9 PTN04050C www.ti.com SLTS251 – SEPTEMBER 2005 Designing for Load Transients The transient response of the dc/dc converter has been characterized using a load transient with a di/dt of 1 A/µs. The typical voltage deviation for this load transient is given in the data sheet specification table using the required value of output capacitance. As the di/dt of a transient is increased, the response of a converter's regulation circuit ultimately depends on its output capacitor decoupling network. This is an inherent limitation of any dc/dc converter once the speed of the transient exceeds its bandwidth capability. If the target application specifies a higher di/dt or lower voltage deviation, the requirement can only be met with additional output capacitor decoupling. In these cases, special attention must be paid to the type, value, and ESR of the capacitors selected. If the transient performance requirements exceed those specified in the data sheet, the selection of output capacitors becomes more important. Obey the minimum ESR and maximum capacitance limits specified in the Electrical Characteristics table. Table 3. Recommended Input/Output Capacitors CAPACITOR CHARACTERISTICS (1) QUANTITY WORKING VOLTAGE (V) VALUE (µF) EQUIVALENT SERIES RESISTANCE (ESR) (Ω) 85°C MAXIMUM RIPPLE CURRENT (Irms) (mA) Panasonic FC( Radial) 25 180 0.117 555 8 X 11 1 1 EEUFC1E181 Panasonic FC (SMD) 25 100 0.30 450 8 X 10,2 1 1 EEVFC1E101P United Chemi-Con PXA (SMD) 16 150 0.026 3430 10 X 7,7 1 1 PXA16VC151MJ80TP (VO≤ 13 V) PS 25 100 0.020 4320 10 X 12,5 1 1 25PS100MJ12 LXZ 25 100 0.250 290 6,3 X 11,5 1 1 LXZ25VB101M6X11LL MVY(SMD) 35 100 0.300 450 8 X 10 1 1 MVY35VC101MH10TP Nichicon UWG (SMD) 50 100 0.300 500 10 X 10 1 1 UWG1H101MNR1GS F559 (Tantalum) 10 100 0.055 2000 7,7 X 4,3 1 HD 25 100 0.130 405 6,3 X 11 1 1 UHD1E101MER Sanyo Os-Con SVP (SMD) 20 100 0.024 2500 8 X 12 1 1 20SVP100M SP 16 100 0.032 2890 10 X 5 1 1 20 100 0.085 1543 7,3L X 4,3W X 4,1H 1 ≤1 (2) TPSV107M020R0085 (VO≤ 10 V) 20 100 0.200 > 817 1 ≤1 (2) TPSE107M020R0200 (VO≤ 10 V) Murata X5R Ceramic 6.3 100 0.002 >1000 3225 1 ≤1 (2) GRM32ER60J107M (VO≤ 5.5 V) TDK X5R Ceramic 6.3 100 0.002 >1000 3225 1 ≤1 (2) C3225X5R0J107MT (VO≤ 5.5 V) Murata X5R Ceramic 16 47 0.002 >1000 3225 2 ≤2 (2) GRM32ER61C476M (Vo≤ 13.5 V) Kemet X5R Ceramic 6.3 47 0.002 >1000 3225 2 ≤2 (2) C1210C476K9PAC (VO≤ 5.5 V) TDK X5R Ceramic 6.3 47 0.002 >1000 3225 2 ≤2 (2) C3225X5R0J476MT (VO≤ 5.5 V) Murata X5R Ceramic 6.3 47 0.002 >1000 3225 2 ≤2 (2) GRM422X5R476M6.3 (VO≤ 5.5 V) TDK X5R Ceramic 16 22 0.002 >1000 3225 5 ≤5 (2) C3225X5R1E2265KT/MT (VO≤ 14 V) CAPACITOR VENDOR/ COMPONENT SERIES AVX Tantalum TPS (SMD) (1) (2) 10 PHYSICAL SIZE (mm) INPUT OUTPUT BUS BUS (2) 1 (2) VENDOR NUMBER F551A107MN (VO≤ 5 V) 16SP100M (VO≤ 14 V) Capacitor Supplier Verification 1. Verify availability of capacitors identified in this table. Capacitor suppliers may recommend alternative part numbers because of limited availability or obsolete products. In some instances, the capacitor product life cycle may be in decline and have short-term consideration for obsolescence. RoHS, Lead-free and Material Details 2. Consult the capacitor suppliers regarding material composition, RoHS status, lead-free status, and manufacturing process requirements. Component designators or part number deviations can occur when material composition or soldering requirements are updated. The maximum voltage rating of the capacitor must be selected for the desired set-point voltage (VO ). To operate at a higher output voltage, select a capacitor with a higher voltage rating. PTN04050C www.ti.com SLTS251 – SEPTEMBER 2005 Table 3. Recommended Input/Output Capacitors (continued) CAPACITOR CHARACTERISTICS QUANTITY WORKING VOLTAGE (V) VALUE (µF) EQUIVALENT SERIES RESISTANCE (ESR) (Ω) 85°C MAXIMUM RIPPLE CURRENT (Irms) (mA) Murata X7R Ceramic 25 22 0.002 >1000 3225 5 Kemet X7R Ceramic 16 22 0.002 >1000 3225 5 CAPACITOR VENDOR/ COMPONENT SERIES PHYSICAL SIZE (mm) INPUT OUTPUT BUS BUS ≤5 ≤5 (2) VENDOR NUMBER GRM32ER61C226K C1210C226K3PAC (VO≤ 14 V) Power-Up Characteristics When configured per the standard application, the PTN04050C power module produces a regulated output voltage following the application of a valid input source voltage. During power up, internal soft-start circuitry slows the rate that the output voltage rises, thereby limiting the amount of in-rush current drawn from the input source.Figure 15 shows the power-up waveforms for a PTN04050C, operating from a 5-V input and with the output voltage adjusted to 12 V. The waveforms were measured with a 1-A resistive load. VO (5 V/div) VI (2 V/div) II (2 A/div) t - Time = 10 ms/div Figure 15. Power-Up Waveforms Overtemperature Protection A thermal shutdown mechanism protects the module's internal circuitry against excessively high temperatures. A rise in temperature may be the result of a drop in airflow, a high ambient temperature, or a sustained overcurrent condition. If the junction temperature of the internal control IC rises excessively, the module turns its boost operation off. Although the module is off, an output voltage of approximately (VI– 300 mV) is still present. The module restarts boost operation when the sensed temperature decreases by approximately 10 degrees. Note: Overtemperature protection is a last resort mechanism to prevent damage to the module. It should not be relied on as permanent protection against thermal stress. Always operate the module within its temperature derated limits, for the worst-case operating conditions of output current, ambient temperature, and airflow. Operating the module above these limits, albeit below the thermal shutdown temperature, reduces the long-term reliability of the module. 11 PTN04050C www.ti.com SLTS251 – SEPTEMBER 2005 Boost Topology With boost regulators an output voltage of approximately (VI - 300 mV) is present whenever the input voltage to the module is below the minimum input voltage range, or during an overtemperature condition. Also, a boost regulator cannot provide inherent short-circuit protection. This is due to the fact that there is a dc path from the input to the output even when the PWM and FET are not operating. This is shown in the boost topology diagram in Figure 16. VI VO PWM IC Figure 16. Typical Boost Converter Topology Optional Input/Output Filters Power modules include internal input and output ceramic capacitors in all their designs. However, some applications require much lower levels of either input reflected or output ripple/noise. This section describes various filters and design techniques found to be successful in reducing both input and output ripple/noise. Input/Output Capacitors A first step toward reducing output ripple and noise is to add one or more 22-µF ceramic capacitors, such as C4 shown in Figure 17. Ceramic capacitors should be placed close to the output power terminals. A single 22-µF capacitor reduces the output ripple/noise by 10% to 30% for modules with a rated output current of less than 3 A. (Note: C3 is recommended to improve the regulators transient response and does not reduce output ripple and noise.) Switching regulators draw current from the input line in pulses at their operating frequency. The amount of reflected (input) ripple/noise generated is directly proportional to the equivalent source impedance of the power source including the impedance of any input lines. The addition of C1, minimum 22-µF ceramic capacitor, near the input power pins, reduces reflected conducted ripple/noise by 30% to 50%. PTN04050C VI 2 VO VI GND 1 C1 22 mF Ceramic C2* 100 mF (Required) VO 4 Adj 3 RSET C3* 100 mF (Required) GND C4 22 mF Ceramic GND * See the Application Information section for suggested value and type. Figure 17. Adding High-Frequency Bypass Capacitors To The Input and Output 12 PTN04050C www.ti.com SLTS251 – SEPTEMBER 2005 π Filters If a further reduction in ripple/noise level is required for an application, higher order filters must be used. A π (pi) filter, employing a ferrite bead (Fair-Rite Part Number 2673000701 or equivalent) in series with the input or output terminals of the regulator reduces the ripple/noise by at least 20 db (see Figure 18 and Figure 19). In order for the inductor to be effective in reduction of ripple and noise, ceramic capacitors are required. (Note: for additional information on vendors and component suggestions, see the capacitor recommendations for the PTN04050C.) These inductors plus ceramic capacitors form an excellent filter because of the rejection at the switching frequency (650 kHz - 1 MHz). The placement of this filter is critical. It must be located as close as possible to the input or output pins to be effective. The ferrite bead is small (12,5 mm X 3 mm), easy to use, low cost, and has low dc resistance. Fair-Rite also manufactures a surface-mount bead (Part No. 2773021447), through hole (Part Number 2673000701) rated to 5 A. Inductors in the range of 1 µH to 5 µH can be used in place of the ferrite inductor bead. VI L1 1 - 5 mH 2 PTN04050C VI VO GND 1 C1 22 mF Ceramic 4 L2 1 - 5 mH VO Adj 3 C2* 100 mF (Required) RSET C4 22 mF Ceramic C3* 100 mF (Required) GND C5 † GND * See the Application Information section for suggested value and type. † Recommended for applications with load transients. Figure 18. Adding π Filters 45 40 Attenuation − dB 35 1 MHz 30 25 20 600 kHz 15 10 0 0.5 1 1.5 2 Load Current − A 2.5 3 Figure 19. π-Filter Attenuation vs. Load Current 13 PACKAGE OPTION ADDENDUM www.ti.com 12-Jan-2006 PACKAGING INFORMATION Orderable Device Status (1) Package Type Package Drawing Pins Package Eco Plan (2) Qty PTN04050CAD ACTIVE DIP MOD ULE EUU 4 56 Pb-Free (RoHS) Call TI N / A for Pkg Type PTN04050CAH ACTIVE DIP MOD ULE EUU 4 56 TBD Call TI N / A for Pkg Type PTN04050CAS ACTIVE DIP MOD ULE EUV 4 56 TBD Call TI Level-1-235C-UNLIM PTN04050CAST ACTIVE DIP MOD ULE EUV 4 250 TBD Call TI Level-1-235C-UNLIM PTN04050CAZ ACTIVE DIP MOD ULE EUV 4 56 Pb-Free (RoHS) Call TI Level-3-260C-168 HR PTN04050CAZT ACTIVE DIP MOD ULE EUV 4 250 Pb-Free (RoHS) Call TI Level-3-260C-168 HR Lead/Ball Finish MSL Peak Temp (3) (1) The marketing status values are defined as follows: ACTIVE: Product device recommended for new designs. LIFEBUY: TI has announced that the device will be discontinued, and a lifetime-buy period is in effect. NRND: Not recommended for new designs. Device is in production to support existing customers, but TI does not recommend using this part in a new design. PREVIEW: Device has been announced but is not in production. Samples may or may not be available. OBSOLETE: TI has discontinued the production of the device. (2) Eco Plan - The planned eco-friendly classification: Pb-Free (RoHS), Pb-Free (RoHS Exempt), or Green (RoHS & no Sb/Br) - please check http://www.ti.com/productcontent for the latest availability information and additional product content details. TBD: The Pb-Free/Green conversion plan has not been defined. Pb-Free (RoHS): TI's terms "Lead-Free" or "Pb-Free" mean semiconductor products that are compatible with the current RoHS requirements for all 6 substances, including the requirement that lead not exceed 0.1% by weight in homogeneous materials. Where designed to be soldered at high temperatures, TI Pb-Free products are suitable for use in specified lead-free processes. Pb-Free (RoHS Exempt): This component has a RoHS exemption for either 1) lead-based flip-chip solder bumps used between the die and package, or 2) lead-based die adhesive used between the die and leadframe. The component is otherwise considered Pb-Free (RoHS compatible) as defined above. Green (RoHS & no Sb/Br): TI defines "Green" to mean Pb-Free (RoHS compatible), and free of Bromine (Br) and Antimony (Sb) based flame retardants (Br or Sb do not exceed 0.1% by weight in homogeneous material) (3) MSL, Peak Temp. -- The Moisture Sensitivity Level rating according to the JEDEC industry standard classifications, and peak solder temperature. Important Information and Disclaimer:The information provided on this page represents TI's knowledge and belief as of the date that it is provided. TI bases its knowledge and belief on information provided by third parties, and makes no representation or warranty as to the accuracy of such information. Efforts are underway to better integrate information from third parties. TI has taken and continues to take reasonable steps to provide representative and accurate information but may not have conducted destructive testing or chemical analysis on incoming materials and chemicals. TI and TI suppliers consider certain information to be proprietary, and thus CAS numbers and other limited information may not be available for release. In no event shall TI's liability arising out of such information exceed the total purchase price of the TI part(s) at issue in this document sold by TI to Customer on an annual basis. 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