Electronic Components Datasheet Search |
|
TPS78601DRBR Datasheet(PDF) 11 Page - Texas Instruments |
|
|
TPS78601DRBR Datasheet(HTML) 11 Page - Texas Instruments |
11 / 29 page C 1 + (3 x 10−7) x (R1 ) R2) (R 1 x R2) V OUT + VREF 1 ) R 1 R 2 R 1 + V OUT V REF * 1 R 2 V IN V OUT 2.2 F m C 1 R 2 2.2 F m IN EN GND OUT FB TPS78601 R 1 1.8V 14.0kW 30.1kW 57.9kW 30.1kW 33pF 15pF 3.6V OUTPUT VOLTAGE R 1 R 2 C 1 OUTPUTVOLTAGE PROGRAMMINGGUIDE TPS786xx www.ti.com SLVS389L – SEPTEMBER 2002 – REVISED OCTOBER 2010 PROGRAMMING THE TPS78601 The approximate value of this capacitor can be ADJUSTABLE LDO REGULATOR calculated using Equation 3: The output voltage of the TPS78601 adjustable regulator is programmed using an external resistor (3) divider as shown in Figure 25. The output voltage is The suggested value of this capacitor for several calculated using Equation 1: resistor ratios is shown in the table below. If this capacitor is not used (such as in a unity-gain configuration), then the minimum recommended (1) output capacitor is 2.2 mF instead of 1 mF. where: REGULATOR PROTECTION • VREF = 1.2246 V typ (the internal reference voltage) The TPS786xx PMOS-pass transistor has a built-in back diode that conducts reverse current when the Resistors R1 and R2 should be chosen for input voltage drops below the output voltage (for approximately 40-mA divider current. Lower value example, during power down). Current is conducted resistors can be used for improved noise from the output to the input and is not internally performance, but the device wastes more power. limited. If extended reverse voltage operation is Higher values should be avoided, as leakage current anticipated, external limiting might be appropriate. at FB increases the output voltage error. The TPS786xx features internal current limiting and The recommended design procedure is to choose thermal protection. During normal operation, the R2 = 30.1 kΩ to set the divider current at 40 mA, TPS786xx limits output current to approximately C1 = 15 pF for stability, and then calculate R1 using 2.8 A. When current limiting engages, the output Equation 2: voltage scales back linearly until the overcurrent condition ends. While current limiting is designed to prevent gross device failure, care should be taken not (2) to exceed the power dissipation ratings of the In order to improve the stability of the adjustable package. If the temperature of the device exceeds version, it is suggested that a small compensation approximately +165°C, thermal-protection circuitry capacitor be placed between OUT and FB. shuts it down. Once the device has cooled down to below approximately +140°C, regulator operation resumes. Figure 25. TPS78601 Adjustable LDO Regulator Programming Copyright © 2002–2010, Texas Instruments Incorporated Submit Documentation Feedback 11 Product Folder Link(s): TPS786xx |
Similar Part No. - TPS78601DRBR |
|
Similar Description - TPS78601DRBR |
|
|
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 |