データシートサーチシステム
  Japanese  ▼
ALLDATASHEET.JP

X  

LM2598S-3.3 データシート(PDF) 10 Page - National Semiconductor (TI)

[Old version datasheet] Texas Instruments acquired National semiconductor.
部品番号 LM2598S-3.3
部品情報  SIMPLE SWITCHER Power Converter 150 kHz 1A Step-Down Voltage Regulator, with Features
Download  33 Pages
Scroll/Zoom Zoom In 100%  Zoom Out
メーカー  NSC [National Semiconductor (TI)]
ホームページ  http://www.national.com
Logo NSC - National Semiconductor (TI)

LM2598S-3.3 データシート(HTML) 10 Page - National Semiconductor (TI)

Back Button LM2598S-3.3 Datasheet HTML 6Page - National Semiconductor (TI) LM2598S-3.3 Datasheet HTML 7Page - National Semiconductor (TI) LM2598S-3.3 Datasheet HTML 8Page - National Semiconductor (TI) LM2598S-3.3 Datasheet HTML 9Page - National Semiconductor (TI) LM2598S-3.3 Datasheet HTML 10Page - National Semiconductor (TI) LM2598S-3.3 Datasheet HTML 11Page - National Semiconductor (TI) LM2598S-3.3 Datasheet HTML 12Page - National Semiconductor (TI) LM2598S-3.3 Datasheet HTML 13Page - National Semiconductor (TI) LM2598S-3.3 Datasheet HTML 14Page - National Semiconductor (TI) Next Button
Zoom Inzoom in Zoom Outzoom out
 10 / 33 page
background image
Test Circuit and Layout Guidelines
(Continued)
As in any switching regulator, layout is very important. Rap-
idly switching currents associated with wiring inductance can
generate voltage transients which can cause problems. For
minimal inductance and ground loops, the wires indicated by
heavy lines should be wide printed circuit traces and
should be kept as short as possible. For best results,
external components should be located as close to the
switcher lC as possible using ground plane construction or
single point grounding.
If open core inductors are used, special care must be
taken as to the location and positioning of this type of induc-
tor. Allowing the inductor flux to intersect sensitive feedback,
lC groundpath and C
OUT wiring can cause problems.
When using the adjustable version, special care must be
taken as to the location of the feedback resistors and the
associated wiring. Physically locate both resistors near the
IC, and route the wiring away from the inductor, especially an
open core type of inductor. (See application section for more
information.)
LM2598 Series Buck Regulator Design Procedure (Fixed Output)
PROCEDURE (Fixed Output Voltage Version)
EXAMPLE (Fixed Output Voltage Version)
Given:
Given:
V
OUT = Regulated Output Voltage (3.3V, 5V or 12V)
V
OUT =5V
V
IN(max) = Maximum DC Input Voltage
V
IN(max) = 12V
I
LOAD(max) = Maximum Load Current
I
LOAD(max) = 1A
1. Inductor Selection (L1)
1. Inductor Selection (L1)
A. Select the correct inductor value selection guide from
Figures
Figure 4, Figure 5,or Figure 6 (Output voltages of
3.3V, 5V, or 12V respectively.) For all other voltages, see the
design procedure for the adjustable version.
A. Use the inductor selection guide for the 5V version shown
in
Figure 5.
B. From the inductor value selection guide, identify the in-
ductance region intersected by the Maximum Input Voltage
line and the Maximum Load Current line. Each region is
identified by an inductance value and an inductor code
(LXX).
B. From the inductor value selection guide shown in
Figure 5,
the inductance region intersected by the 12V horizontal line
and the 1A vertical line is 68 µH, and the inductor code is
L30.
C. Select an appropriate inductor from the four manufactur-
er’s part numbers listed in
Figure 8.
C. The inductance value required is 68 µH. From the table in
Figure 8, go to the L30 line and choose an inductor part
number from any of the four manufacturers shown. (In most
instance, both through hole and surface mount inductors are
available.)
2. Output Capacitor Selection (C
OUT)
2. Output Capacitor Selection (C
OUT)
A. In the majority of applications, low ESR (Equivalent Series
Resistance) electrolytic capacitors between 47 µF and 330
µF and low ESR solid tantalum capacitors between 56 µF
and 270 µF provide the best results. This capacitor should be
located close to the IC using short capacitor leads and short
copper traces. Do not use capacitors larger than 330 µF.
For additional information, see section on output capaci-
tors in application information section.
A. See section on output capacitors in application infor-
mation section.
www.national.com
10


同様の部品番号 - LM2598S-3.3

メーカー部品番号データシート部品情報
logo
Texas Instruments
LM2598S-3.3/NOPB TI1-LM2598S-3.3/NOPB Datasheet
2Mb / 47P
[Old version datasheet]   SIMPLE SWITCHER Power Converter 150-kHz 1-A Step-Down Voltage Regulator, With Features
More results

同様の説明 - LM2598S-3.3

メーカー部品番号データシート部品情報
logo
National Semiconductor ...
LM2590HV NSC-LM2590HV Datasheet
752Kb / 20P
   SIMPLE SWITCHER Power Converter 150 kHz 1A Step-Down Voltage Regulator, with Features
LM2591HV NSC-LM2591HV Datasheet
730Kb / 20P
   SIMPLE SWITCHER Power Converter 150 kHz 1A Step-Down Voltage Regulator
LM2595 NSC-LM2595 Datasheet
935Kb / 29P
   SIMPLE SWITCHER Power Converter 150 kHz 1A Step-Down Voltage Regulator
LM2597 NSC-LM2597 Datasheet
900Kb / 34P
   SIMPLE SWITCHER Power Converter 150 kHz 0.5A Step-Down Voltage Regulator, with Features
LM2593HV NSC-LM2593HV Datasheet
753Kb / 21P
   SIMPLE SWITCHER Power Converter 150 kHz 2A Step-Down Voltage Regulator, with Features
LM2599 NSC-LM2599 Datasheet
812Kb / 31P
   SIMPLE SWITCHER Power Converter 150 kHz 3A Step-Down Voltage Regulator, with Features
logo
Texas Instruments
LM2598 TI1-LM2598_13 Datasheet
2Mb / 45P
[Old version datasheet]   SIMPLE SWITCHER짰 Power Converter 150 kHz 1A Step-Down Voltage Regulator with Features
logo
National Semiconductor ...
LM2590HV-AQ NSC-LM2590HV-AQ Datasheet
885Kb / 22P
   SIMPLE SWITCHER짰Power Converter 150 kHz 1A Step-Down Voltage Regulator, with Features
logo
Texas Instruments
LM2598 TI1-LM2598 Datasheet
2Mb / 47P
[Old version datasheet]   SIMPLE SWITCHER Power Converter 150-kHz 1-A Step-Down Voltage Regulator, With Features
LM2590HVSX-5.0-NOPB TI1-LM2590HVSX-5.0-NOPB Datasheet
788Kb / 22P
[Old version datasheet]   LM2590HV SIMPLE SWITCHERPower Converter 150 kHz 1A Step-Down Voltage Regulator, with Features
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 24 25 26 27 28 29 30 31 32 33


データシート ダウンロード

Go To PDF Page


リンク URL




プライバシーポリシー
ALLDATASHEET.JP
ALLDATASHEETはお客様のビジネスに役立ちますか?  [ DONATE ] 

Alldatasheetは   |   広告   |   お問い合わせ   |   プライバシーポリシー   |   リンク交換   |   メーカーリスト
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