PTH03060Y PTH05060Y, PTH12060Y www.ti.com SLTS222A - MARCH 2004 - REVISED OCTOBER 2005 10-A NON-ISOLATED DDR/QDR MEMORY BUS TERMINATION MODULES FEATURES * * * * * * * * * VTT Bus Termination Output (Output Tracks the System VREF) 10 A Output Current 3.3-V, 5-V or 12-V Input Voltage DDR and QDR Compatible On/Off Inhibit (for VTT Standby) Undervoltage Lockout Operating Temperature: -40C to 85C Efficiencies up to 91% Output Overcurrent Protection (Non-Latching, Auto-Reset) * * * 57 W/in3 Power Density Safety Agency Approvals: UL/cUL60950, EN60950, VDE Point-of-Load Alliance (POLATM) Compatible NOMINAL SIZE 1 in. x 0.62 in (25,4 mm x 15,75 mm) DESCRIPTION The PTHxx060Y are a series of ready-to-use switching regulator modules from Texas Instruments designed specifically for bus termination in DDR and QDR memory applications. Operating from either a 3.3-V, 5-V or 12-V input, the modules generate a VTT output that will source or sink up to 10 A of current to accurately track their VREF input. VTT is the required bus termination supply voltage, and VREF is the reference voltage for the memory and chipset bus receiver comparators. VREF is usually set to half the VDDQ power supply voltage. Both the PTHxx060Y series employs an actively switched synchronous rectifier output to provide state-of-the-art stepdown switching conversion. The products are small in size (1 in x 0.62 in), and are an ideal choice where space, performance, and high efficiency are desired, along with the convenience of a ready-to-use module. Operating features include an on/off inhibit and output over-current protection (source mode only). The on/off inhibit feature allows the VTT bus to be turned off to save power in a standby mode of operation. To ensure tight load regulation, an output remote sense is also provided. Package options include both throughhole and surface mount configurations. STANDARD APPLICATION VIN VREF VDDQ 1k 1% 1 10 9 8 VTT 7 PTHxx060Y (Top View) 1k 1% 2 Con hf-Ceramic 6 3 4 5 Standby Q1 BSS138 (Optional) GND Co1 Low-ESR (Required) Co2 Ceramic (Optional) VTT Termination Island CIN (Required) SSTL-2 Bus CIN = Required Capacitor; 330F (3.3 5 V Input), 560 F (12 V Input). Co1 = Required Low-ESR Electrolyitic Capacitor; 470 F (3.3 5 V Input), 940 F (12 V Input). Co2 = Ceramic Capacitance for Optimum Response to a 3 A (+ 1.5 A) Load Transient; 200 F (3.3 5 V Input), 400 F (12 V Input). Con = Distributed hf-Ceramic Decoupling Capacitors for VTT bus; as Recommended for DDR Memory Applications. 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. POLA is a trademark of Texas Instruments. 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 (c) 2004-2005, Texas Instruments Incorporated PTH03060Y PTH05060Y, PTH12060Y www.ti.com SLTS222A - MARCH 2004 - REVISED OCTOBER 2005 ORDERING INFORMATION PTHXX060Y (Base Part Number) Input Voltage Part Number 3.3 V 5V 12 V (1) (2) (3) (4) (1) DESCRIPTION Pb - free and RoHS (3) Mechanical Package (2) PTH03060YAH Horizontal T/H Yes PTH03060YAS Standard SMD No (4) EUW EUY EUY PTH03060YAZ Optional SMD Yes (3) PTH05060YAH Horizontal T/H Yes (3) EUW PTH05060YAS Standard SMD No (4) EUY EUY PTH05060YAZ Optional SMD Yes (3) PTH12060YAH Horizontal T/H Yes (3) EUW PTH12060YAS Standard SMD No (4) EUY PTH12060YAZ Optional SMD Yes (3) EUY 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. ENVIRONMENTAL AND ABSOLUTE MAXIMUM RATINGS voltages are with respect to GND UNIT VREF Control input voltage TA Operating temperature range Over VIN range Twave Wave solder temperature Surface temperature of module body or pins (5 seconds) Treflow Solder reflow temperature Surface temperature of module body or pins Ts Storage temperature -0.3 V to Vin+03 V 2 260C (2) PTHXX060YAS 235C (2) PTHXX060YAZ 260C (2) -40C to 125C Per Mil-STD-883D, Method 2002.3 1 msec, 1/2 Sine, mounted 500 G Mechanical vibration Mil-STD-883D, Method 2007.2 20-2000 Hz 20 G Flammability (2) PTHXX060YAH Mechanical shock Weight (1) -40C to 85C (1) 3.7 grams Meets UL 94V-O For operation below 0C, the external capacitors must have stable characteristics, use either a low ESR tantalum, Os-Con, or ceramic capacitor. During soldering of package version, do not elevate peak temperature of the module, pins or internal components above the stated maximum. PTH03060Y PTH05060Y, PTH12060Y www.ti.com SLTS222A - MARCH 2004 - REVISED OCTOBER 2005 ELECTRICAL SPECIFICATIONS TA = 25C; nominal VIN; VREF = 1.25 V; CIN, CO1, and CO2 = typical values; and IO = IOmax (unless otherwise stated) PARAMETER Output current IO TEST CONDITIONS Over VREF range Continuous PTH03060Y Input voltage range VIN Over IO range VREF Tracking range for VREF |VTT- VREF| Tracking tolerance to VREF Over line, load and temperature Efficiency Io = 8 A MIN MAX UNIT 0 TYP 10 (1) A 2.95 3.65 PTH05060Y 4.5 5.5 PTH12060Y 10.8 13.2 0.55 1.8 V -10 10 mV PTH03060Y 86% PTH05060Y 86% PTH12060Y 83% V Vr Vo Ripple (pk-pk) 20 MHz bandwidth 20 Io trip Overcurrent threshold Reset, followed by auto recovery 20 A 30 sec ttr Load transient response Vtr 15 A/s load step, from: -1.5 A to 1.5 A VIN Increasing UVLO Under-voltage lockout VIN Dncreasing Recovery time VO over/undershoot 25 40 PTH03060Y 2.45 2.8 PTH05060Y 4.3 4.45 PTH12060Y 9.5 10.4 PTH03060Y 2.0 2.40 PTH05060Y 3.4 3.7 8.8 9 PTH12060Y Inhibit control (pin 4) Input high voltage VIH Referenced to GND VIL Inhibit control (pin 4) Input low voltage IIL inhibit Inhibit control (pin 4) Input low curent Pin to GND IIN inh Input standby current Inhibit control (pin 4) to GND fs Switching frequency CIN External input capacitance Over VIN and IO ranges CO1, CO2 External output capacitance Capacitance value: Ceramic (1) (2) (3) (4) (5) (6) Reliability Open (2) -0.2 0.6 10 350 PTH12060Y 200 250 300 330 (3) PTH03060Y/PTH05060Y 470 (4) 5500 (5) PTH12060Y 940 (4) 5500 (5) PTH03060Y/PTH05060Y 200 (4) 300 PTH12060Y 400 (4) 600 6 V kHz F 560 4 (6) V mA 300 Per Bellcore TR-332 50 % stress, TA = 40C, ground benign V A 250 Equuivanent series resistance (non-ceramic) MTBF VIN-0.5 PTH03060Y/PTH05060Y PTH12060Y mV V 130 PTH03060Y/PTH05060Y Capacitance value: Nonceramic mVpp F F m 106 Hrs Rating is conditional on the module being directly soldered to a 4-layer PCB with 1 oz. copper. See the SOA curves or contact the factory for appropriate derating. This control pin has an internal pull-up to the input voltage VIN. If it is left open-circuit the module will operate when input power is applied. A small low-leakage (<100 nA) MOSFET is recommended for control. For further information, consult the related application note. An input capacitor is required for proper operation. The capacitor must be rated for a minimum of 300 mA rms (750 mA rms for 12-V input) of ripple current. The minimum value of external output capacitance value ensures that VTT meets the specified transient performance requirements for the memory bus terminations. Lower values of capacitance may be possible when the measured peak change in output current is consistently less than 3 A. This is the calculated maximum. The minimum ESR limitation will often result in a lower value. Consult the capacitor application notes for further guidance. This is the typcial ESR for all the electrolytic (non-ceramic) output capacitance. Use 7 m as the minimum when using max-ESR values to calculate. 3 PTH03060Y PTH05060Y, PTH12060Y www.ti.com SLTS222A - MARCH 2004 - REVISED OCTOBER 2005 Terminal Functions TERMINAL NAME VIN NO. 2 DESCRIPTION The positive input voltage power node to the module, which is referenced to common GND. 1, 7 This is the common ground connection for the VIN and VTT power connections. It is also the 0-VDC reference for the control inputs. VREF 8 The module senses the voltage at this input to regulate the output voltage, VTT. The voltage at VREF is also the reference voltage for the system bus receiver comparators. It is normally set to precisely half the bus driver supply voltage (VDDQ/ 2), using a resistor divider. The Thevenin impedance of the network driving the VREF pin should not exceed 500 . See the Typical DDR Application Diagram in the Application Information section for reference. VTT 6 This is the regulated power output from the module with respect to the GND node, and the tracking termination supply for the application data and address buses. It is precisely regulated to the voltage applied to the module's VREF input, and is active active about 20 ms after a valid input source is applied to the module. Once active it will track the voltage applied at VREF. Vo Sense 5 The sense input allows the regulation circuit to compensate for voltage drop between the module and the load. For optimal voltage accuracy Vo Sense should be connected to VTT. 3 The Inhibit pin is an open-collector/drain negative logic input that is referenced to GND. Applying a low-level ground signal to this input turns off the output voltage, VTT. Although the module is inhibited, a voltage, VDDQ will be present at the output terminals, fed through the DDR memory. When the Inhibit is active, the input current drawn by the regulator is significantly reduced. If the Inhibit pin is left open circuit, the module will produce an output whenever a valid input source is applied. See the Typical DDR Application Diagram in the Application Information section for reference. GND Inhibit N/C 4, 9, 10 No connect 1 10 9 8 7 PTHXX060 (Top View) 2 6 3 4 4 5 PTH03060Y PTH05060Y, PTH12060Y www.ti.com SLTS222A - MARCH 2004 - REVISED OCTOBER 2005 TYPICAL CHARACTERISTICS (VREF =1.25 V) (1) (2) EFFICIENCY vs LOAD CURRENT 10 0 VIN = 5 V OUTPUT RIPPLE vs LOAD CURRENT 60 VIN = 12 V 80 70 60 40 30 2 4 6 8 IL - Load Current - A VIN = 3.3 V VIN = 5 V 20 10 0 0 10 0 2 4 6 8 IL - Load Current - A VIN = 5 V 1 VIN = 3.3 V 10 0 0 2 4 6 8 10 IL - Load Current - A Figure 3. 90 80 Nat Cinv TA- Ambient Temperature 5-C TA- Ambient Temperature 5-C 2 PTH12060Y ONLY; VIN = 12 V TEMPERATURE DERATING vs LOAD CURRENT 90 200 LFM 70 100 LFM 400 LFM 60 50 40 30 0 2 4 6 IL - Load Current - A Figure 4. (2) VIN = 12 V Figure 2. PTH03060Y/PTH05060Y AT NOMINAL VIN TEMPERATURE DERATING vs LOAD CURRENT (1) 3 VIN = 12 V Figure 1. 20 PD - Power Dissipation - W 50 Output Ripple - mV Efficiency - % 4 VIN = 3.3 V 90 50 POWER DISSIPATION vs LOAD CURRENT 8 10 Nat Cinv 80 100 LFM 70 200 LFM 400 LFM 60 50 40 30 20 VIN = 12 V 0 2 4 6 8 IL - Load Current - A 10 Figure 5. The electrical characteristic data has been developed from actual products tested at 25C. This data is considered typical for the converter. Applies to Figure 1, Figure 2, and Figure 3. The temperature derating 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 4 in x 4 in double-sided PCB with 1 oz. copper. For surface mount packages (AS and AZ suffix), multiple vias (plated through holes) are required to add thermal paths around the power pins. Please refer to the mechanical specification for more information. Applies to Figure 4, and Figure 5. 5 PTH03060Y PTH05060Y, PTH12060Y www.ti.com SLTS222A - MARCH 2004 - REVISED OCTOBER 2005 TYPICAL CHARACTERISTICS TRANSIENT PERFORMANCE FOR 3-A LOAD CHANGE PTH03060Y/PTH05060Y: SOURCE-SINK-SOURCE TRANSIENT PTH12060Y: SOURCE-SINK-SOURCE TRANSIENT VTT - VREF VTT - VREF ITT (52A/div) ITT (2A/div) (50 mV/div) 50 ms/div Figure 6. 6 (50 mV/div) 50 ms/div Figure 7. PTH03060Y PTH05060Y, PTH12060Y www.ti.com SLTS222A - MARCH 2004 - REVISED OCTOBER 2005 APPLICATION INFORMATION Typical DDR Application Diagram Auto-Track VI= 5V VI + Margin +Sense PTH05010W VDDQ I/O Memory +VADJ Inhibit 470 F 5.51 k 47 F VI + 220 F Inhibit PTH05050Y DDR Termination VDDQ = 1.8 V VO + 2x 330 F 2x 22 F VTT = 0.9 V VTT +VREF DDRII/ QDRII + 2x 330 F 2x 22 F 1 k 47 F 1 k UDG-05096 CAPACITOR RECOMMENDATIONS FOR THE PTH03060Y AND PTH05060Y DDR POWER MODULES (3.3-V/5-V OPTION) Input Capacitor The recommended input capacitor(s) is determined by the 330 F(1) minimum capacitance and 300 mArms minimum ripple current rating. Ripple current and less than 160 m equivalent series resistance (ESR) values are the major considerations, along with temperature, when designing with different types of capacitors. Unlike polymer tantalum, regular tantalum capacitors have a recommended minimum voltage rating of 2 x (maximum DC voltage + AC ripple). This is standard practice to insure reliability. For improved ripple reduction on the input bus, ceramic capacitors may be substituted for electrolytic types using the minimum required capacitance. Output Capacitors For applications with load transients (sudden changes in load current), regulator response will benefit from external output capacitance. The recommended output capacitance of 470 F will allow the module to meet its transient response specification (see Electrical Specifications table). For most applications, a high quality computer-grade aluminum electrolytic capacitor is adequate. These capacitors provide decoupling over the frequency range, 2 kHz to 150 kHz, and are suitable when ambient temperatures are above 0C. For operation below 0C tantalum, ceramic or Os-Con type capacitors are recommended. When using one or more non-ceramic capacitors, the calculated equivalent ESR should be no lower than 4 m (7 m using the manufacturer's maximum ESR for a single capacitor). A list of preferred low-ESR type capacitors are identified in Table 1. 7 PTH03060Y PTH05060Y, PTH12060Y www.ti.com SLTS222A - MARCH 2004 - REVISED OCTOBER 2005 APPLICATION INFORMATION (continued) Ceramic Capacitors Above 150 kHz the performance of aluminum electrolytic capacitors becomes less effective. To further improve the reflected input ripple current or the output transient response. Multilayer ceramic capacitors have very low ESR and their resonant frequency higher than the bandwidth of the regulator. They can be used to reduce the reflected ripple current at the input as well as improve the transient response of the output. When used on the output their combined ESR is not critical as long as the total value of ceramic capacitance does not exceed 300 F. Also, to prevent the formation of local resonances, do not place more than five identical ceramic capacitors in parallel with values of 10 F or greater. Tantalum Capacitors Tantalum type capacitors can be used at both the input and output, and are recommended for applications where the ambient operating temperature can be less than 0C. The AVX TPS, Sprague 593D/594/595 and Kemet T495/T510 capacitor series are suggested over many other tantalum types due to their higher 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 when determining their power dissipation and surge current rating. 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 will be encountered well before the maximum capacitance value is reached. Capacitor Table Table 1 identifies the characteristics of capacitors from a number of 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 ripple current rating and ESR (at 100 kHz) are critical parameters necessary to insure both optimum regulator performance and long capacitor life. Table 1. Input/Output Capacitors (1) Capacitor Characteristics Capacitor Vendor, Type/Series (Style) Working Voltage (V) FC (Radial) FK (SMD) FC (SMD) Quantity Vendor Part Number Value (F) Max ESR at 100 kHz () Max Ripple Current at 85C (Irms) (mA) Physical Size (mm) Input Bus Output Bus 10 470 0.117 555 8x11,5 1 1 EEUFC1A471 10 470 0.160 600 8x10,2 1 1 EEVFK1A471P 10 470 0.150 670 10x10,2 1 1 EEVFC1A471P PXA, Poly-Aluminum (SMD) 10 470 0.012 5300 10x12,2 1 1 PXA10VC471MJ12TP PS, Poly-Aluminum (Radial) 10 470 0.012 5300 8x12,2 1 1 10PS470MJ12 LXZ, Aluminum (Radial) 10 470 0.120 555 8x12 1 1 LXZ10VB471M8X12LL Panasonic, Aluminum United Chemi-Con Nichicon Aluminum WG (SMD) 10 470 0.150 670 10x10 1 1 UWG1A471MNR1GS HD (Radial) 10 470 0.072 760 8x11.5 1 1 UHD1A471MPR PM (Radial) 16 330 0.120 625 10x12,5 1 2 UPM1C331MPH6 (1) 8 Capacitor Supplier Verification Please 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 Please consult 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. PTH03060Y PTH05060Y, PTH12060Y www.ti.com SLTS222A - MARCH 2004 - REVISED OCTOBER 2005 APPLICATION INFORMATION (continued) Table 1. Input/Output Capacitors (continued) Capacitor Characteristics Capacitor Vendor, Type/Series (Style) Quantity Vendor Part Number Working Voltage (V) Value (F) Max ESR at 100 kHz () Max Ripple Current at 85C (Irms) (mA) Physical Size (mm) Input Bus Output Bus 6.3 180 0.005 4000 7,.3x4,3x4,2 2 N/R (2) EEFSE0J181R SEPC, Os-con (Radial) 16 470 0.010 6100 10x13 1 1 16SEPC470M SVP (SMD) 6.3 470 0.015 4210 8x11,9 1 2 6SVP470M TPE, Poscap (SMD) 6.3 330 0.025 2400 7.3x4.3 1 3 6TPE330ML TPS Series III 10 470 0.045 1915 1 5 TPSE477M010R0045 TPS (SMD) 10 470 0.100 1432 7.3L x5.7W x4.1H 1 5 TPSV477M010R0100 T520 (SMD) 10 330 0.040 1800 T530 (SMD) 10 330 0.010 >5200 595D, Tantalum (SMD) 10 330 0.100 594D, Tantalum (SMD) 10 330 0.045 94SA,Poly-Aluminum (SMD) 6.3 330 0.025 3500 94SVP, Poly-Aluminum (SMD) 6.3 470 0.017 3960 16 10 0.002 - 6.3 47 0.002 Panasonic, Poly-Aluminum: S/SE (SMD) Sanyo AVX, Tantalum Kemet, Poly-Tantalum 4.3W x7.3L x4.0H 1 1 T520X337M010AS 1 1 T530X337M010ASE010 1040 1 5 595D377x0010D2T 2360 1 5 594D337X0016R2T 1 3 94SA337X06R3FBP 1 2 94SVP477X06R3E12 3225 mm 1 5 C1210C106M4PAC 3225 mm 1 5 C1210C476K9PAC 3225 mm 1 (3) 3 GRM32ER60J107M 3225 mm 1 (3) 5 GRM32ER60J476M Vishay-Sprague Kemet, Ceramic X5R (SMD) Murata, Ceramic X5R (SMD) TDK, Ceramic X5R (SMD) (2) (3) 0.002 6.3 100 6.3 47 16 22 1 (3) 5 GRM32ER61C226K 16 10 1 (3) 5 GRM32DR61C106K 6.3 100 3225 mm 1 (3) 3 C3225X5R0J107MT 6.3 47 3225 mm 1 (3) 5 C3225X5R0J476MT 16 22 1 (3) 5 C3225X5R1C226MT 16 10 1 (3) 5 C3225X5R1C106MT 0.002 - 7.2Lx6W x4.1H 10 x10,5 8,3x12 - N/R - Not recommended. The capacitor does not meet the minimum operating limits. A ceramic capacitor may be used to compliment electrolytic types at the input to further reduce high-frequency ripple current. Designing for Very Fast Load Transients The transient response of the DC/DC converter has been characterized using a load transient with a di/dt of 1 A/s. The typical voltage deviation for this load transient is given in the data sheet specification table using the optional 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 with 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 that specified in the data sheet, or the total amount of load capacitance is above 5500 F, the selection of output capacitors becomes more important. 9 PTH03060Y PTH05060Y, PTH12060Y www.ti.com SLTS222A - MARCH 2004 - REVISED OCTOBER 2005 CAPACITOR RECOMMENDATIONS (12-V OPTION) FOR THE PTH12060Y DDR POWER MODULES Input Capacitor The recommended input capacitance is determined by the 560 F [1] minimum capacitance and 750 mArms minimum ripple current rating. A 10-F X5R/X7R ceramic capacitor can be added to reduce the reflected input ripple current. The ceramic capacitor should be located between the input electrolytic and the module. Ripple current, less than 100 m equivalent series resistance (ESR) and temperature, are major considerations when selecting input capacitors. Unlike polymer-tantalum capacitors, regular tantalum capacitors have a recommended minimum voltage rating of 2 x (max. dc voltage + ac ripple). No tantalum capacitors were found with sufficient voltage rating to meet this requirement. At temperatures below 0C, the ESR of aluminum electrolytic capacitors increases. For these applications, Os-Con, polymer-tantalum, and polymer-aluminum types should be considered. Output Capacitors For applications with load transients (sudden changes in load current), regulator response will benefit from external output capacitance. The recommended output capacitance of 940F will allow the module to meet its transient response specification (See Electrical Specifications table). For most applications, a high quality, computer-grade aluminum electrolytic capacitor is adequate. These capacitors provide decoupling over the frequency range, 2 kHz to 150 kHz, and are suitable for ambient temperatures above 0C. Below 0C, tantalum, ceramic, or Os-Con type capacitors are recommended. When using one or more nonceramic capacitors, the calculated equivalent ESR should be no lower than 4 m (7 m using the manufacturer's maximum ESR for a single capacitor). A list of preferred low-ESR type capacitors are identified in Table 2. In addition to electrolytic capacitance, adding a 10-F to 22-F X5R/X7R ceramic capacitor to the output reduces the output ripple voltage and improves the regulator's transient response. The measurement of both the output ripple and transient response is also best achieved across a 10-F ceramic capacitor. Ceramic Capacitors Above 150 kHz, the performance of aluminum electrolytic capacitors is less effective. Multilayer ceramic capacitors have a low ESR and a resonant frequency higher than the bandwidth of the regulator. They can be used to reduce the reflected ripple current at the input, and improve the transient response of the output. When used on the output, their combined ESR is not critical as long as the total value of ceramic capacitance does not exceed 600 F. Also, to prevent the formation of local resonances, do not place more than five identical ceramic capacitors in parallel with values of 10 F or greater. Tantalum Capacitors Tantalum type capacitors are most suited for use on the output bus, and are recommended for applications where the ambient operating temperature can be less than 0C. The AVX TPS, Sprague 593D/594/595, and Kemet T495/T510 capacitor series are suggested over other tantalum types due to their higher 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 Table 2 identifies the characteristics of capacitors from a number of 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. Note: This is not an extensive capacitor list. Capacitors from other vendors are available with comparable specifications. Those listed are for guidance. The RMS ripple current rating and ESR (at 100 kHz) are critical parameters necessary to insure both optimum regulator performance and long capacitor life. 10 PTH03060Y PTH05060Y, PTH12060Y www.ti.com SLTS222A - MARCH 2004 - REVISED OCTOBER 2005 Designing for Very Fast Load Transients The transient response of the dc/dc converter is characterized using a load transient with a di/dt of 1 A/s. The typical voltage deviation for this load transient is given in the data sheet specification table using the optional 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 with 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 is 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 that specified in this data sheet, or the total amount of load capacitance is above 5500 F, the selection of output capacitors becomes more important. Table 2. Input/Output Capacitors (1) Capacitor Characteristics Capacitor Vendor, Type/Series (Style) Working Voltage (V) Value (F) Max ESR at 100 kHz () Max Ripple Current at 85C (Irms) (mA) Quantity Physical Size (mm) Input Bus Output Bus Vendor Number Panasonic, Aluminum 25 560 0.065 1205 12,5 x 15 1 1 EEUFC1E561S FC (Radial) 25 1000 0.060 1100 12,5 x 13,5 1 1 EEVFK1E102Q FK (SMD) 35 680 0.060 1100 12,5 x 13,5 1 1 EEVFK1V681Q United Chemi-Con LXZ, Aluminum (Radial) 16 330 0.0014 5050 10 x 12,5 2 2 16PS330MJ12 PS, Poly-Aluminum (Radial) 16 680 0.068 1050 10 x 16 1 1 LXZ16VB681M10X16LL PXA, Poly-Aluminum (SMD) 16 330 0.014 5050 10 x 12,2 2 2 PXA16VC331MJ12 Nichicon Aluminum 25 560 0.060 1060 12,5 x 15 1 1 UPM1E561MHH6 PM (Radial) 16 680 0.038 1430 10 x 16 1 1 UHD1C681MHR HD (Radial) 35 560 0.048 1360 16 x 15 1 1 UPM1V561MHH6 TPE, pos-cap (SMD) 10 330 0.025 3000 7,3 L x 5,7 W N/R (2) 3 10TPE330M SEPC, Os-con (Radial) 16 270 0.011 5000 8 x 12 2 (3) 1 16SP270M SVP, Os-con (SMD) 16 330 0.016 4700 11 x 12 2 2 16SVP330M SVPC, Os-con (SMD) 4 1200 0.010 4700 8 x 11,9 N/R (2) 1 4SVPC1200M TPS Series III (SMD) 10 470 0.045 >1723 7,3 Lx 5,7 W x4,1H N/R (2) 5 TPSE477M019R0045 TPS (SMD) 10 330 0.045 >1723 7,3 L x4,3 W x4,3 H N/R (2) 5 TPSE337M019R0045 T520, Poly-Tantalum ( SMD) 10 470 0.040 1800 7,3 L x4,3 W x4,3 H N/R (2) 5 T520X477M006ASE040 T530, Tantalum/Organic (SMD) 4 680 0.010 >5100 7,3 L x4,3 W x4,3 H N/R (2) 1 T530X687M004ASE010 6.3 470 0.010 5200 7,3 L x4,3 W x4,3 H N/R (2) 1 T530X477M006ASE010 594D, Tantalum (SMD) 10 470 0.100 1440 7,2 L x6 Wx 4,1 H N/R (2) 5 595D477X0010R2T 94SA, organic (Radial ) 16 1000 0.015 >9700 16 x 25 1 2 94Sa108X0016HBP 94SVP, Organic (SMD) 16 330 0.017 >4500 10 x 12,7 2 2 94SVP477X0016F12 Sanyo AVX, Tantalum Kemet Vishay-Sprague (1) (2) (3) Capacitor Supplier Verification Please 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 Please consult 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. N/R - Not recommended. The capacitor voltage rating does not meet the minimum operating limits. A total capacitance of 540 F is acceptable based on the combined ripple current rating. 11 PTH03060Y PTH05060Y, PTH12060Y www.ti.com SLTS222A - MARCH 2004 - REVISED OCTOBER 2005 Table 2. Input/Output Capacitors (continued) Capacitor Characteristics Capacitor Vendor, Type/Series (Style) Kemet, Ceramic X5R (SMD) Murata, Ceramic X5R (SMD) TDK, Ceramic X5R (SMD) (4) 12 Working Voltage (V) Value (F) Max ESR at 100 kHz () Max Ripple Current at 85C (Irms) (mA) Quantity Physical Size (mm) Input Bus Output Bus Vendor Number 16 10 0.002 3225 mm 1 (4) 5 C1210C106M4PAC 6.3 47 0.002 3225 mm N/R (2) 5 C1210C476K9PAC 6.3 100 0.002 3225 mm N/R (2) 4 GRM32ER60J107M 6.3 47 3225 mm N/R (2) 5 GRM32ER60J476M 16 22 1 (4) 5 GRM32ER61C226K 16 10 1 (4) 5 GRM32DR61C106K 6.3 100 3225 mm N/R (2) 4 C3225X5R0J107MT 6.3 47 3225 mm N/R (2) 5 C3225X5R0J476MT 16 22 1 (4) 5 C3225X5R1C226MT 16 10 1 (4) 5 C3225X5R1C106MT 0.002 Ceramic capacitors are recommended to complement electrolytic types at the input bus by reducing high-frequency ripple current. PTH03060Y PTH05060Y, PTH12060Y www.ti.com SLTS222A - MARCH 2004 - REVISED OCTOBER 2005 TAPE AND REEL SPECIFICATION 13 PTH03060Y PTH05060Y, PTH12060Y www.ti.com SLTS222A - MARCH 2004 - REVISED OCTOBER 2005 TRAY SPECIFICATION 14 PACKAGE OPTION ADDENDUM www.ti.com 13-Nov-2010 PACKAGING INFORMATION Orderable Device Status (1) Package Type Package Drawing Pins Package Qty Eco Plan (2) Lead/ Ball Finish PTH03060YAH ACTIVE ThroughHole Module EUW 10 36 Pb-Free (RoHS) SN PTH03060YAS ACTIVE Surface Mount Module EUY 10 36 TBD PTH03060YAST ACTIVE Surface Mount Module EUY 10 250 PTH03060YAZ ACTIVE Surface Mount Module EUY 10 PTH03060YAZT ACTIVE Surface Mount Module EUY PTH05060YAH ACTIVE ThroughHole Module PTH05060YAS ACTIVE PTH05060YAST MSL Peak Temp (3) Samples (Requires Login) N / A for Pkg Type Purchase Samples SNPB Level-1-235C-UNLIM/ Level-3-260C-168HRS Purchase Samples TBD SNPB Level-1-235C-UNLIM/ Level-3-260C-168HRS Purchase Samples 36 Pb-Free (RoHS) SNAGCU Level-3-260C-168 HR Purchase Samples 10 250 Pb-Free (RoHS) SNAGCU Level-3-260C-168 HR Purchase Samples EUW 10 36 Pb-Free (RoHS) SN Surface Mount Module EUY 10 36 TBD ACTIVE Surface Mount Module EUY 10 250 PTH05060YAZ ACTIVE Surface Mount Module EUY 10 PTH05060YAZT ACTIVE Surface Mount Module EUY PTH12060YAH ACTIVE ThroughHole Module PTH12060YAS ACTIVE PTH12060YAST N / A for Pkg Type Request Free Samples SNPB Level-1-235C-UNLIM/ Level-3-260C-168HRS Request Free Samples TBD SNPB Level-1-235C-UNLIM/ Level-3-260C-168HRS Purchase Samples 36 Pb-Free (RoHS) SNAGCU Level-3-260C-168 HR Purchase Samples 10 250 Pb-Free (RoHS) SNAGCU Level-3-260C-168 HR Purchase Samples EUW 10 36 Pb-Free (RoHS) SN N / A for Pkg Type Purchase Samples Surface Mount Module EUY 10 36 TBD SNPB Level-1-235C-UNLIM/ Level-3-260C-168HRS Purchase Samples ACTIVE Surface Mount Module EUY 10 250 TBD SNPB Level-1-235C-UNLIM/ Level-3-260C-168HRS Purchase Samples PTH12060YAZ ACTIVE Surface Mount Module EUY 10 36 Pb-Free (RoHS) SNAGCU Level-3-260C-168 HR Request Free Samples PTH12060YAZT ACTIVE Surface Mount Module EUY 10 250 Pb-Free (RoHS) SNAGCU Level-3-260C-168 HR Purchase Samples (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. Addendum-Page 1 PACKAGE OPTION ADDENDUM www.ti.com 13-Nov-2010 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. 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