 |
Electronic Components Datasheet Search |
|
|
Electronic Components Datasheet Search |
|
EUP7982-18MIR0 Datasheet(PDF) 9 Page - Eutech Microelectronics Inc |
|
||||||||||||||||||||||||||||||
EUP7982-18MIR0 Datasheet(HTML) 9 Page - Eutech Microelectronics Inc |
|
|
9 / 10 page  EUP7982 DS7982 Ver 1.4 May.2005 9 Adjustable Operation The adjustable version of the EUP7982 has an output voltage range of 1.25V to 6V. The output voltage of the EUP7982 adjustable regulator is programmed using an external resistor divider as shown in Figure3. The output voltage is calculated using: Where: Vref=1.23V typ. (the internal reference voltage) Utilize the following equation for adjusting the output to a particular voltage: − = 1 1.23V V R P O 2 I Choose R2=100k to optimize accuracy, power supply rejection, noise and power consumption. In order to improve the stability of the adjustable version, it is suggested that a small compensation capacitor C1 be placed between OUT and SET Figure3. Adjustable LDO Regulator Programming Fault Detection The EUP7982 provides a FAULT pin that goes low during out of regulation conditions like current limit and thermal shutdown, or when it approaches dropout. The latter monitors the input-to-output voltage differential and compares it against a threshold that is slightly above the dropout voltage. This threshold also tracks the dropout voltage as it varies with load current. Refer to Fault Detect vs. Load Current curve in the typical characteristics section. The FAULT pin requires a pull-up resistor since it is an open-drain output. This resistor should be large in value to reduce energy drain. A100kΩ pull-up resistor works well for most applications. Shutdown The EUP7982 goes into sleep mode when the SHDN pin is in a logic low condition. During this condition, the pass transistor, error amplifier, and bandgap are turned off, reducing the supply current to 60nA typical. The SHDN pin may be directly tied to VIN to keep the part on. Fast Start-up The EUP7982 provides fast start-up time for better system efficiency. The start-up speed is maintained when using the optional noise bypass capacitor. ) R R (1 V V 2 1 ref O + × = |
Similar Part No. - EUP7982-18MIR0 |
|
Similar Description - EUP7982-18MIR0 |
|
|
|
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
