 |
Electronic Components Datasheet Search |
|
|
Electronic Components Datasheet Search |
|
TPS7A4901DGNR Datasheet(PDF) 11 Page - Texas Instruments |
|
|
||||||||||||||||||||||||||||||
TPS7A4901DGNR Datasheet(HTML) 11 Page - Texas Instruments |
|
|
11 / 23 page  TPS7A4901 OUT FB GND C 10 F IN m C 10nF NR/SS R 1 R 2 C 10nF BYP C 10 F OUT m IN EN NR/SS V IN V OUT V OUT V REF - 1 R =R 1 2 V OUT R +R 1 2 ³ 5 A m ,where TPS7A49xx www.ti.com SBVS121A – AUGUST 2010 – REVISED SEPTEMBER 2010 THEORY OF OPERATION GENERAL DESCRIPTION CAPACITOR RECOMMENDATIONS The TPS7A49xx belongs to a family of new generation linear regulators that use an innovative Low ESR capacitors should be used for the input, bipolar process to achieve ultralow-noise and very output, noise reduction, and bypass capacitors. high PSRR levels at a wide input voltage range. Ceramic capacitors with X7R and X5R dielectrics are These features, combined with a high thermal preferred. These dielectrics offer more stable performance MSOP-8 with PowerPAD package make characteristics. Ceramic X7R capacitors offer this device ideal for high-performance analog improved over-temperature performance, while applications. ceramic X5R capacitors are the most cost-effective and are available in higher values. ADJUSTABLE OPERATION Note that high ESR capacitors may degrade PSRR. The TPS7A4901 has an output voltage range of To ensure stability, maximum ESR must be less than +1.194 to +33V. The nominal output voltage of the 200m Ω. device is set by two external resistors, as shown in Figure 28. INPUT AND OUTPUT CAPACITOR REQUIREMENTS The TPS7A49xx family of positive, high-voltage linear regulators achieve stability with a minimum input and output capacitance of 2.2mF; however, it is highly recommended to use a 10mF capacitor to maximize ac performance. NOISE REDUCTION AND BYPASS CAPACITOR REQUIREMENTS Figure 28. Adjustable Operation for Maximum AC Although noise reduction and bypass capacitors Performance (CNR/SS and CBYP, respectively) are not needed to achieve stability, it is highly recommended to use R1 and R2 can be calculated for any output voltage 0.01mF capacitors to minimize noise and maximize ac range using the formula shown in Equation 1. To performance. ensure stability under no load conditions, this resistive network must provide a current equal to or MAXIMUM AC PERFORMANCE greater than 5mA. In order to maximize noise and PSRR performance, it is recommended to include 10mF or higher input and (1) output capacitors, and 0.01mF noise reduction and bypass capacitors, as shown in Figure 28. The If greater voltage accuracy is required, take into solution shown delivers minimum noise levels of account the output voltage offset contributions 15.4mVRMS and power-supply rejection levels above because of the feedback pin current and use 0.1% 52dB from 10Hz to 400kHz; see Figure 18 and tolerance resistors. Figure 19. ENABLE PIN OPERATION The TPS7A49xx provides an enable feature (EN) that turns on the regulator when VEN > 2.1V. Copyright © 2010, Texas Instruments Incorporated Submit Documentation Feedback 11 |
Similar Part No. - TPS7A4901DGNR |
|
Similar Description - TPS7A4901DGNR |
|
|
|
Link URL |
| Privacy Policy |
| ALLDATASHEET.NET |
| Does ALLDATASHEET help your business so far? [ DONATE ] |
About Alldatasheet | Advertisement | 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
