 |
数据搜索系统，热门电子元器件搜索 |
|
|
数据搜索系统，热门电子元器件搜索 |
|
EP5358LUI 数据表(PDF) 13 Page - Altera Corporation |
|
|
|||||||||||||||||||||||||||||
EP5358LUI 数据表(HTML) 13 Page - Altera Corporation |
|
|
13 / 16 page  EP5358LUI/EP5358HUI VOUTOLD is the VID table output voltage. For a given Rs Value, the VOUTNEW for VID settings is determined by the following equations: EP5358LUI: Volts Rs VOUT VOUT L OLD NEW + = 1 711 EP5358HUI: Volts Rs VOUT VOUT H OLD NEW + = 1 356 NOTE: The amount of adjustment is limited to approximately 15% of the nominal VID setting. NOTE: Adjusting VOUT using this method will increase the tolerance of the output voltage. The larger the adjustment, the greater the increase in tolerance. Power-Up/Down Sequencing During power-up, ENABLE should not be asserted before PVIN, and PVIN should not be asserted before AVIN. The PVIN should never be powered when AVIN is off. During power down, the AVIN should not be powered down before the PVIN. Tying PVIN and AVIN or all three pins (AVIN, PVIN, ENABLE) together during power up or power down meets these requirements . Pre-Bias Start-up The EP5358xUI does not support startup into a pre-biased condition. Be sure the output capacitors are not charged or the output of the EP5358xUI is not pre-biased when the EP5358xUI is first enabled. Input Filter Capacitor For ILOAD ≤ 500mA, CIN = 2.2uF For ILOAD > 500mA CIN = 4.7uF. 0402 capacitor case size is acceptable. The input capacitor must use a X5R or X7R or equivalent dielectric formulation. Y5V or equivalent dielectric formulations lose capacitance with frequency, bias, and with temperature, and are not suitable for switch- mode DC-DC converter input filter applications. Output Filter Capacitor For VIN ≤ 4.3V, C OUT_MIN = 10uF 0603 MLCC. For VIN > 4.3V, COUT_MIN = 10uF 0805 MLCC. Ripple performance can be improved by using 2x10µF 0603 MLCC capacitors (for any allowed VIN). The maximum output filter capacitance next to the output pins of the device is 60µF low ESR MLCC capacitance. VOUT has to be sensed at the last output filter capacitor next to the EP5358xUI. Additional bulk capacitance for decoupling and bypass can be placed at the load as long as there is sufficient separation between the VOUT Sense point and the bulk capacitance. Excess total capacitance on the output (Output Filter + Bulk) can cause an over-current condition at startup. Refer to the section on Soft-Start for the maximum total capacitance on the output. The output capacitor must use a X5R or X7R or equivalent dielectric formulation. Y5V or equivalent dielectric formulations lose capacitance with frequency, bias, and temperature and are not suitable for switch- mode DC-DC converter output filter applications. www.altera.com/enpirion Page 13 03541 October 11, 2013 Rev F |
|
|
链接网址 |
| ALLDATASHEET是否为您带来帮助? [ DONATE ] |
关于 Alldatasheet | 广告服务 | 联系我们 | 隐私政策 | 数据表链接 | 链接交换 | 制造商名单 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 |
Chinese ▼
English
Chinese
German
Japanese
Russian
Korean
Spanish
French
Italian
Portuguese
Polish
Vietnamese
Indian
Mexican
British
New Zealand
