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PTH12010WAZ Datasheet(PDF) 10 Page - Texas Instruments |
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PTH12010WAZ Datasheet(HTML) 10 Page - Texas Instruments |
10 / 27 page www.ti.com DESIGNING FOR VERY FAST LOAD TRANSIENTS PTH12010W, PTH12010L SLTS205E–JUNE 2003–REVISED APRIL 2006 APPLICATION INFORMATION (continued) 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 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 3000 µF, the selection of output capacitors becomes more important. Table 1. Input/Output Capacitors(29) CAPACITOR CHARACTERISTICS QUANTITY CAPACITOR VENDOR, WORKING VALUE MAX. ESR MAX RIPPLE PHYSICAL INPUT OPTIONAL VENDOR PART TYPE/SERIES, (STYLE) VOLTAGE (µF) AT 100 kHz CURRENT AT SIZE (mm) BUS OUTPUT NUMBER 85°C (lrms) BUS Panasonic, Aluminum 25 V 560 0.065 Ω 1205 mA 12,5 x 15 1 1 EEUFC1E561S (FC) FC, Radial 25 V 1000 0.060 Ω 1100 mA 12,5 x 13,5 1 1 EEVFK1E102Q FK, (SMD) 35 V 680 0.060 Ω 1100 mA 12,5 x 13,5 1 1 EEVFK1V681Q United Chemi-Con PS, Poly-Aluminum 16 V 330 0.014 Ω 5050 mA 10 x 12,5 2 ≤2 16PS330MJ12 (Radial) LXZ, Aluminium (Radial) 16 V 680 0.068 Ω 1050 mA 10 x 16 1 1 LXZ16VB681M10X16LL PXA, Poly-Aluminum 16 V 330 0.014 Ω 5050 mA 10 x 12,2 2 ≤2 PXA16VC331MJ12TP (SMD) Nichicon, Aluminum 25 V 560 0.060 Ω 1060 mA 12,5 x 15 1 1 UPM1E561MHH6 (PM) HD, (Radial) 16 V 680 0.038 Ω 1430 mA 10 x 16 1 1 UHD1C681MPR PM, (Radial) 35 V 560 0.048 Ω 1360 mA 16 x 15 1 1 UPM1V561MHH6 Panasonic, Poly-Aluminum S/SE, 6.3 V 180 0.005 Ω 4000 mA 7,3 x 4,3 x 4,2 N/R(30) ≤1(31) EEFSEOJ181R (SMD)Poly-Aluminum (VO ≤ 5.1 V) Sanyo TPE Poscap (SMD) 10 V 330 0.025 Ω 3000 mA 7,3 x 5,7 N/R(2) ≤4 10TPE330M SEQP, Os-Con (Radial) 16 V 330 0.016 Ω >4720 mA 10 x 13 2 ≤2 16SEQP330M SVP, Os-Con (SMD) 16 V 330 0.016 Ω 4700 mA 11 x 12 2 ≤3 16SVP330M AVX, Tantalum Series III TPS (SMD) 10 V 470 0.045 Ω >1723 mA N/R(2) ≤5(3) TPSE477M010R0045 7,3 x 5,7 x 4,1 (VO ≤ 5.1 V) 10 V 330 0.045 Ω >1723 mA N/R(2) ≤5(3) TPSE377M010R0045 (VO ≤ 5.1 V) Kemet (29) 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. (30) N/R –Not recommended. The capacitor voltage rating does not meet the minimum derated operating limits. (31) The voltage rating of this capacitor only allows it to be used for output voltages that are equal to or less than 5.1 V. 10 Submit Documentation Feedback |
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