Datenblatt-Suchmaschine für elektronische Bauteile
  German  ▼
ALLDATASHEETDE.COM

X  

LM22678QTJ-ADJ Datenblatt(PDF) 7 Page - Texas Instruments

Teilenummer LM22678QTJ-ADJ
Bauteilbeschribung  LM22678/LM22678Q 42V, 5A SIMPLE SWITCHER Step-Down Voltage Regulator with
Download  23 Pages
Scroll/Zoom Zoom In 100%  Zoom Out
Hersteller  TI1 [Texas Instruments]
Direct Link  http://www.ti.com
Logo TI1 - Texas Instruments

LM22678QTJ-ADJ Datenblatt(HTML) 7 Page - Texas Instruments

Back Button LM22678QTJ-ADJ Datasheet HTML 3Page - Texas Instruments LM22678QTJ-ADJ Datasheet HTML 4Page - Texas Instruments LM22678QTJ-ADJ Datasheet HTML 5Page - Texas Instruments LM22678QTJ-ADJ Datasheet HTML 6Page - Texas Instruments LM22678QTJ-ADJ Datasheet HTML 7Page - Texas Instruments LM22678QTJ-ADJ Datasheet HTML 8Page - Texas Instruments LM22678QTJ-ADJ Datasheet HTML 9Page - Texas Instruments LM22678QTJ-ADJ Datasheet HTML 10Page - Texas Instruments LM22678QTJ-ADJ Datasheet HTML 11Page - Texas Instruments Next Button
Zoom Inzoom in Zoom Outzoom out
 7 / 23 page
background image
LOGIC
OSC
+
-
TYPE III
COMP
+
-
1.285V
&
Soft-start
INT REG, EN,UVLO
GND
SW
BOOT
VIN
EN
FB
VIN
VOUT
Error Amp.
PWM Cmp.
Vcc
ILimit
LM22678
www.ti.com
SNVS585K – SEPTEMBER 2008 – REVISED MARCH 2013
Simplified Block Diagram
Figure 11. Simplified Block Diagram
Detailed Operating Description
The LM22678 incorporates a voltage mode constant frequency PWM architecture. In addition, input voltage feed-
forward is used to stabilize the loop gain against variations in input voltage. This allows the loop compensation to
be optimized for transient performance. The power MOSFET, in conjunction with the diode, produce a
rectangular waveform at the switch pin, that swings from about zero volts to VIN. The inductor and output
capacitor average this waveform to become the regulator output voltage. By adjusting the duty cycle of this
waveform, the output voltage can be controlled. The error amplifier compares the output voltage with the internal
reference and adjusts the duty cycle to regulate the output at the desired value.
The internal loop compensation of the -ADJ option is optimized for outputs of 5V and below. If an output voltage
of 5V or greater is required, the -5.0 option can be used with an external voltage divider. The minimum output
voltage is equal to the reference voltage; 1.285V (typ.).
The functional block diagram of the LM22678 is shown in Figure 11 .
Precision Enable and UVLO
The precision enable input (EN) is used to control the regulator. The precision feature allows simple sequencing
of multiple power supplies with a resistor divider from another supply. Connecting this pin to ground or to a
voltage less than 1.6V (typ.) will turn off the regulator. The current drain from the input supply, in this state, is 25
µA (typ.) at an input voltage of 12V. The EN input has an internal pull-up of about 6 µA. Therefore this pin can be
left floating or pulled to a voltage greater than 2.2V (typ.) to turn the regulator on. The hysteresis on this input is
about 0.6V (typ.) above the 1.6V (typ.) threshold. When driving the enable input, the voltage must never exceed
the 6V absolute maximum specification for this pin.
Copyright © 2008–2013, Texas Instruments Incorporated
Submit Documentation Feedback
7
Product Folder Links: LM22678


Ähnliche Teilenummer - LM22678QTJ-ADJ

HerstellerTeilenummerDatenblattBauteilbeschribung
logo
Texas Instruments
LM22678QTJ-ADJ TI1-LM22678QTJ-ADJ Datasheet
1Mb / 23P
[Old version datasheet]   LM22678/LM22678Q 42V, 5A SIMPLE SWITCHER Step-Down Voltage Regulator with Features
LM22678QTJ-ADJ/NOPB TI-LM22678QTJ-ADJ/NOPB Datasheet
1Mb / 26P
[Old version datasheet]   SIMPLE SWITCHER Step-Down Voltage Regulator With Features
More results

Ähnliche Beschreibung - LM22678QTJ-ADJ

HerstellerTeilenummerDatenblattBauteilbeschribung
logo
Texas Instruments
LM22678TJE-ADJ TI1-LM22678TJE-ADJ Datasheet
1Mb / 23P
[Old version datasheet]   LM22678/LM22678Q 42V, 5A SIMPLE SWITCHER Step-Down Voltage Regulator with Features
logo
National Semiconductor ...
LM22678TJE-ADJ NSC-LM22678TJE-ADJ Datasheet
513Kb / 14P
   LM22678 5A SIMPLE SWITCHER짰, Step-Down Voltage Regulator with Precision Enable
logo
Texas Instruments
LM22675QMR-ADJ TI-LM22675QMR-ADJ Datasheet
1Mb / 23P
[Old version datasheet]   LM22675/LM22675Q 42V, 1A SIMPLE SWITCHER Step-Down Voltage Regulator with
LM22670MRE-ADJ TI-LM22670MRE-ADJ Datasheet
1Mb / 29P
[Old version datasheet]   LM22670/LM22670Q 42V, 3A SIMPLE SWITCHER, Step-Down Voltage Regulator with
LM25574 TI1-LM25574_16 Datasheet
973Kb / 30P
[Old version datasheet]   SIMPLE SWITCHER 42V, 0.5A Step-Down Switching Regulator
LM25574 TI1-LM25574_17 Datasheet
970Kb / 30P
[Old version datasheet]   SIMPLE SWITCHER 42V, 0.5A Step-Down Switching Regulator
LM25576 TI1-LM25576_17 Datasheet
1Mb / 29P
[Old version datasheet]   SIMPLE SWITCHER 42V, 3A Step-Down Switching Regulator
LM25575 TI1-LM25575_17 Datasheet
1Mb / 32P
[Old version datasheet]   SIMPLE SWITCHER 42V, 1.5A Step-Down Switching Regulator
LM22670TJE-5 TI1-LM22670TJE-5 Datasheet
1Mb / 29P
[Old version datasheet]   LM22670/LM22670Q 42V, 3A SIMPLE SWITCHER, Step-Down Voltage Regulator
logo
National Semiconductor ...
LM2678 NSC-LM2678 Datasheet
459Kb / 27P
   SIMPLE SWITCHER High Efficiency 5A Step-Down Voltage Regulator
More results


Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23


Datenblatt Download

Go To PDF Page


Link URL




Privatsphäre und Datenschutz
ALLDATASHEETDE.COM
War ALLDATASHEET hilfreich?  [ DONATE ] 

Über Alldatasheet   |   Werbung   |   Kontakt   |   Privatsphäre und Datenschutz   |   Linktausch   |   Hersteller
All Rights Reserved©Alldatasheet.com


Mirror Sites
English : Alldatasheet.com  |   English : Alldatasheet.net  |   Chinese : Alldatasheetcn.com  |   German : Alldatasheetde.com  |   Japanese : Alldatasheet.jp
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