 |
Electronic Components Datasheet Search |
|
|
Electronic Components Datasheet Search |
|
TPS65010RGZT Datasheet(PDF) 50 Page - Texas Instruments |
|
|
|
|||||||||||||||||||||||||||||
TPS65010RGZT Datasheet(HTML) 50 Page - Texas Instruments |
|
|
50 / 63 page  O I O O O V 1 V 1 V V ESR L ƒ 8 C ƒ - æ ö D = ´ ´ + ç ÷ ´ ´ ´ è ø O I RMSC(out) O V 1 V 1 I V L ƒ 2 3 - = ´ ´ ´ ´ TPS65010 SLVS149C – JUNE 2003 – REVISED SEPTEMBER 2015 www.ti.com 8.2.1.2.2 Output Capacitor Selection The advanced fast response voltage mode control scheme of the inductive converters implemented in the TPS65010 allow the use of small ceramic capacitors with a typical value of 22 µF for the main converter and 10 µF for the core converter without having large output voltage under and overshoots during heavy load transients. Ceramic capacitors having low ESR values have the lowest output voltage ripple and are recommended. If required tantalum capacitors with an ESR < 100 ΩR may be used as well. Refer to Table 30 for recommended components. If ceramic output capacitors are used, the capacitor RMS ripple current rating always meet the application requirements. Just for completeness the RMS ripple current is calculated as: (5) At nominal load current, the inductive converters operate in PWM mode and the overall output voltage ripple is the sum of the voltage spike caused by the output capacitor ESR plus the voltage ripple caused by charging and discharging the output capacitor: (6) Where the highest output voltage ripple occurs at the highest input voltage VI. At light load currents, the converters operate in power save mode and the output voltage ripple is independent of the output capacitor value. The output voltage ripple is set by the internal comparator thresholds. The typical output voltage ripple is 1% of the nominal output voltage. If the output voltage for the core converter is programmed to its lowest voltage of 0.85 V, the output capacitor must be increased to 22 µF for low output voltage ripple. This is because the current in the inductor decreases slowly during the off-time and further increases the output voltage even when the PMOS is off. This effect increases with low output voltages. 8.2.1.2.3 Input Capacitor Selection Because of the nature of the buck converter, having a pulsating input current a low ESR input capacitor is required for best input voltage filtering and minimizing the interference with other circuits caused by high input voltage spikes. The main converter needs a 22-µF ceramic input capacitor and the core converter a 10-µF ceramic capacitor. The input capacitor for the main and the core converter can be combined and one 22-µF capacitor can be used instead, because the two converters operate with a phase shift of 270 degrees. The input capacitor can be increased without any limit for better input voltage filtering. The VCC pin must be separated from the input for the main and the core converter. A filter resistor of up to 100R and a 1-µF capacitor is used for decoupling the VCC pin from switching noise. Table 30. Possible Capacitors CAPACITOR VALUE CASE SIZE COMPONENT SUPPLIER COMMENTS 22 µF 1206 TDK C3216X5R0J226M Ceramic 22 µF 1206 Taiyo Yuden JMK316BJ226ML Ceramic 22 µF 1210 Taiyo Yuden JMK325BJ226MM Ceramic 50 Submit Documentation Feedback Copyright © 2003–2015, Texas Instruments Incorporated Product Folder Links: TPS65010 |
Similar Part No. - TPS65010RGZT |
|
Similar Description - TPS65010RGZT |
|
|
Link URL |
| Privacy Policy |
| ALLDATASHEET.COM |
| Does ALLDATASHEET help your business so far? [ DONATE ] |
About Alldatasheet | Advertisement | Datasheet Upload | Contact us | Privacy Policy | Link Exchange | Manufacturer List All Rights Reserved©Alldatasheet.com |
| Russian : Alldatasheetru.com | Korean : Alldatasheet.co.kr | Spanish : Alldatasheet.es | French : Alldatasheet.fr | Italian : Alldatasheetit.com Portuguese : Alldatasheetpt.com | Polish : Alldatasheet.pl | Vietnamese : Alldatasheet.vn Indian : Alldatasheet.in | Mexican : Alldatasheet.com.mx | British : Alldatasheet.co.uk | New Zealand : Alldatasheet.co.nz |
|
Family Site : ic2ic.com |
icmetro.com |
English ▼
English
Chinese
German
Japanese
Russian
Korean
Spanish
French
Italian
Portuguese
Polish
Vietnamese
Indian
Mexican
British
New Zealand
