Moteur de recherche de fiches techniques de composants électroniques |
|
LM34919 Fiches technique(PDF) 4 Page - National Semiconductor (TI) |
|
|
LM34919 Fiches technique(HTML) 4 Page - National Semiconductor (TI) |
4 / 18 page Absolute Maximum Ratings (Note 1) If Military/Aerospace specified devices are required, please contact the National Semiconductor Sales Office/ Distributors for availability and specifications. VIN to RTN 44V BST to RTN 52V SW to RTN (Steady State) -1.5V ESD Rating (Note 2) Human Body Model 2kV BST to VCC 44V VIN to SW 44V BST to SW 14V VCC to RTN 14V SGND to RTN -0.3V to +0.3V SS to RTN -0.3V to 4V All Other Inputs to RTN -0.3 to 7V Storage Temperature Range -65°C to +150°C JunctionTemperature 150°C Operating Ratings (Note 1) VIN 8.0V to 40V Junction Temperature −40°C to + 125°C Electrical Characteristics Specifications with standard type are for T J = 25°C only; limits in boldface type apply over the full Operating Junction Temperature (T J) range. Minimum and Maximum limits are guaranteed through test, design, or statistical correlation. Typical values represent the most likely parametric norm at T J = 25°C, and are provided for reference purposes only. Unless otherwise stated the following conditions apply: V IN = 12V, RON = 200kΩ. See (Note 5). Symbol Parameter Conditions Min Typ Max Units Start-Up Regulator, V CC V CCReg V CC regulated output 6.6 7 7.4 V V IN-VCC dropout voltage I CC = 0 mA, V CC = UVLOVCC + 250 mV 1.2 V V CC output impedance 0 mA ≤ I CC ≤ 5 mA, VIN = 8V 175 Ω V CC current limit (Note 3) V CC = 0V 9.5 mA UVLO VCC V CC under-voltage lockout threshold V CC increasing 5.7 V UVLO VCC hysteresis V CC decreasing 150 mV UVLO VCC filter delay 100 mV overdrive 3 µs I Q I IN operating current Non-switching, FB = 3V, SW = Open 0.5 0.8 mA I SD I IN shutdown current RON/SD = 0V, SW = Open 75 150 µA Switch Characteristics Rds(on) Buck Switch Rds(on) I TEST = 200 mA 0.5 1.0 Ω UVLO GD Gate Drive UVLO V BST - VSW Increasing 3.0 4.4 5.2 V UVLO GD hysteresis 480 mV Softstart Pin V SS Pull-up voltage 2.5 V Internal current source V SS = 1V 10.5 µA Current Limit I LIM Threshold Current out of ISEN 0.52 0.64 0.76 A Resistance from ISEN to SGND 140 m Ω Response time 150 ns On Timer t ON - 1 On-time V IN = 10V, RON = 200 kΩ 2.1 2.77 3.5 µs t ON - 2 On-time V IN = 40V, RON = 200 kΩ 700 ns Shutdown threshold Voltage at RON/SD rising 0.45 0.8 1.2 V Threshold hysteresis Voltage at RON/SD 25 mV Off Timer t OFF Minimum Off-time 155 ns Regulation and Over-Voltage Comparators (FB Pin) V REF FB regulation threshold SS pin = steady state 2.440 2.5 2.550 V FB over-voltage threshold 2.9 V FB bias current FB = 3V 1 nA www.national.com 4 |
Numéro de pièce similaire - LM34919_08 |
|
Description similaire - LM34919_08 |
|
|
Lien URL |
Politique de confidentialité |
ALLDATASHEET.FR |
ALLDATASHEET vous a-t-il été utile ? [ DONATE ] |
À propos de Alldatasheet | Publicité | Contactez-nous | Politique de confidentialité | Echange de liens | Fabricants 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 |