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PT6515N Datasheet(PDF) 7 Page - Texas Instruments |
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PT6515N Datasheet(HTML) 7 Page - Texas Instruments |
7 / 11 page Application Notes For technical support or further information, visit http://power.ti.com Table 2-1: Suggested Input/Output Capacitors N/R –Not recommended. The ripple current rating and ESR does not meet the requirements. Capacitor Recommendations for the PT6510 Series of Integrated Switching Regulators Input Capacitors: The recommended input capacitance is determined by 330 µF minimum value (300 µF for Oscon or low-ESR tantalum types), and 1 A minimum ripple current rating. Ripple current and less than 100 m Ω equivalent series resistance (ESR) are the major parameters, along with temperature, when selecting an input capacitor. Tanta- lum capacitors have a recommended minimum voltage rating of twice 2 × (max. DC voltage + AC ripple). This is standard practice to insure reliability. Output Capacitors: The ESR of the required output capacitor must not be greater than 150 m Ω. Electrolytic capacitors have poor ripple performance at frequencies greater than 400 kHz but excellent low-frequency transient response. Above the ripple frequency, ceramic capacitors are necessary to improve the transient response and reduce any high frequency noise components apparent during higher current excursions. Preferred low-ESR type capacitor part numbers are identified in Table 2-1. Tantalum Capacitors Tantalum type capacitors may be used for the output but only the AVX TPS, Sprague 593D/594/595, or Kemet T495/T510 series. These capacitors are recommended over many other tantalum types due to their higher rated surge, power dissipation, and ripple current capability. As a caution the TAJ series by AVX is not recommended. This series has considerably higher ESR, reduced power dissipation, and lower ripple current capability. The TAJ series is less reliable than the AVX TPS series when determining power dissipation capability. Tantalum or Oscon types are recommended for applications where ambient temperatures fall below 0 °C. Capacitor Table Table 2-1 identifies the characteristics of capacitors from a number of vendors with acceptable ESR and ripple current (rms) ratings. The 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. r o t i c a p a C / r o d n e V t n e n o p m o C s e i r e S s c i t s i r e t c a r a h C r o t i c a p a Cy t i t n a u Q g n i k r o W e g a t l o V) F µ ( e u l a V R S E . x a M z H k 0 0 1 t a e l p p i R . x a M C ° 5 8 t a t n e r r u C ) s m r I ( e z i S l a c i s y h P ) m m ( t u p n I s u B t u p t u O s u B r e b m u N r o d n e V c i n o s a n a P C F V 5 2 V 5 3 V 5 3 F µ 0 6 5 F µ 0 9 3 F µ 0 3 3 5 6 0 0 . 0 Ω 5 6 0 . 0 Ω 7 1 1 . 0 Ω A m 5 0 2 1 A m 5 0 2 1 A m 5 5 5 5 1 x 5 . 2 1 5 1 x 5 . 2 1 5 . 1 1 x 8 1 2 R / N 1 1 1 S 1 6 5 E 1 C F U E E S 1 9 3 V 1 C F U E E 1 3 3 C 1 C F U E E d e t i n U n o C - i m e h C / S F / V X L Z X L V 6 1 V 5 3 V 0 1 V 0 2 F µ 0 3 3 F µ 0 7 4 F µ 0 3 3 F µ 0 5 1 0 2 1 . 0 Ω 2 5 0 . 0 Ω 5 2 0 . 0 Ω 0 3 0 . 0 ÷2 Ω A m 5 5 5 A m 0 2 2 1 A m 0 0 5 3 A m 0 0 2 3 2 1 x 8 0 2 x 0 1 5 . 0 1 x 0 1 5 . 0 1 x 0 1 R / N 1 1 2 1 1 1 2 L L 2 1 X 8 M 1 3 3 B V 6 1 Z X L L L 0 2 X 0 1 M 1 7 4 B V 5 3 Z X L M 0 3 3 S F 0 1 M 0 5 1 S F 0 2 n o c i h c i N M P / L P V 5 3 V 5 3 V 0 5 0 6 5F µ 0 3 3F µ 0 7 4F µ 8 4 0 . 0 Ω 5 6 0 . 0 ÷2 Ω 6 4 0 . 0 Ω A m 0 6 3 1 A m 0 2 0 1 A m 0 7 4 1 5 1 x 6 1 5 1 x 5 . 2 1 5 1 x 8 1 1 1 1 1 1 1 6 H H M 1 6 5 V 1 L P U 6 H H M 1 3 3 V 1 L P U 6 H H M 1 1 7 4 H 1 M P U c i n o s a n a P C F ) g t M e c a f r u S ( V 0 1 V 5 3 V 6 1 0 0 0 1F µ 0 3 3F µ 0 3 3F µ 3 4 0 . 0 Ω 5 6 0 . 0 Ω 0 5 1 . 0 Ω A m 5 0 2 1 A m 5 0 2 1 A m 0 7 6 5 . 6 1 x 2 1 6 1 x 5 . 2 1 2 . 0 1 x 0 1 1 1 R / N 1 1 1 Q L 2 0 1 A 1 C F V E E Q L 1 3 3 V 1 C F V E E P 1 3 3 C 1 C F V E E S S - n o c s O V S V 0 1 V 0 1 V 0 2 0 3 3F µ F µ 0 3 3 0 5 1F µ 5 2 0 . 0 Ω 5 2 0 . 0 Ω 4 2 0 . 0 ÷2 Ω A m 0 0 5 3 > A m 0 0 8 3 > A m 0 0 6 3 5 . 0 1 x 0 . 0 1 3 . 0 1 x 3 . 0 1 3 . 0 1 x 3 . 0 1 1 1 2 1 1 2 M 0 3 3 S S 0 1 M 0 3 3 V S 0 1 M 0 5 1 V S 0 2 t n u o M e c a f r u S = V S X V A m u l a t n a T S P T V 0 1 V 0 1 V 0 1 F µ 0 3 3 F µ 0 3 3 F µ 0 2 2 0 0 1 . 0 ÷2 Ω 0 0 1 . 0 ÷2 Ω 5 9 0 . 0 Ω A m 0 0 5 2 > A m 0 0 0 3 > A m 0 0 0 2 > x L 3 . 7 x W 3 . 4 H 1 . 4 2 2 2 1 1 2 0 0 1 0 R 0 1 0 M 7 3 3 V S P T 0 6 0 0 R 0 1 0 M 7 3 3 V S P T 0 0 1 0 R 5 0 1 0 M 7 2 2 V S P T t e m e K / 0 1 5 T 5 9 4 T V 0 1 V 0 1 F µ 0 3 3 F µ 0 2 2 3 3 0 . 0 Ω 7 0 . 0 ÷ Ω 5 3 0 . 0 = 2 Ω A m 0 0 4 1 A m 0 0 0 2 > W 7 . 5 x L 3 . 7 H 0 . 4 x 2 2 1 2 S A 0 1 0 M 7 3 3 X 0 1 5 T S A 0 1 0 M 7 2 2 X 5 9 4 T e u g a r p S D 4 9 5 V 0 1 V 0 1 F µ 0 3 3 F µ 0 2 2 5 4 0 . 0 Ω 5 6 0 . 0 Ω A m 0 5 3 2 A m 0 0 0 2 > x L 3 . 7 x W 0 . 6 H 1 . 4 2 2 1 2 T 2 R 0 1 0 0 X 7 3 3 D 4 T 2 D 0 1 0 0 X 7 2 2 D 4 9 5 PT6510 Series |
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Similar Description - PT6515N |
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