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LA5744のメーカーはON Semiconductorです、この部品の機能は「Separately-Excited Step-Down Switching Regulator」です。 |
部品番号 | LA5744 |
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部品説明 | Separately-Excited Step-Down Switching Regulator | ||
メーカ | ON Semiconductor | ||
ロゴ | |||
このページの下部にプレビューとLA5744ダウンロード(pdfファイル)リンクがあります。 Total 5 pages
Ordering number : ENA0717C
LA5744
Monolithic Linear IC
Separately-Excited Step-Down
Switching Regulator
(Variable Type)
http://onsemi.com
Overview
The LA5744 is a separately-excited step-down switching regulator (variable type).
Functions
• High efficiency.
• Time-base generator (300kHz) incorporated.
• Current limiter incorporated.
• Thermal shutdown circuit incorporated.
• Soft start circuit incorporated.
Specifications
Maximum Ratings at Ta = 25°C
Parameter
Symbol
Conditions
Input voltage
Maximum output current
SW pin application reverse voltage
Allowable power dissipation
VIN
IO max
VSW
Pd max1
No heat sink
Pd max2
Infinite heat sink
Operating temperature
Topr
Storage temperature
Tstg
Junction temperature
Tj max
* Specified circuit board : 76.1×114.3×1.6mm3 : Copper foil ratio 60% FR4
Ratings
30
3
-1
1.75
7.5
-30 to +125
-40 to +150
150
Unit
V
A
V
W
W
°C
°C
°C
Stresses exceeding Maximum Ratings may damage the device. Maximum Ratings are stress ratings only. Functional operation above the Recommended Operating
Conditions is not implied. Extended exposure to stresses above the Recommended Operating Conditions may affect device reliability.
Recommended Operating Conditions at Ta = 25°C
Parameter
Input voltage range
Symbol
VIN
Conditions
Ratings
4.5 to 28
Unit
V
Semiconductor Components Industries, LLC, 2013
August, 2013
52307 MS PC 20070522-S00004 / 42507 MS PC / 31407 MS PC / 30707 MS PC No.A0717-1/5
1 Page Block Diagram
LA5744
VIN 1
Constant
current
circuit
Reg.
OCP
OSC
Reset
Comp.
Drive
TSD
ON/OFF Comp.
0.4V
Amp.
53
SS GND
VREF
2 SWOUT
4 VOS
Application Circuit Example
VIN
SWOUT
L1
22μH
C1
470μF
/50V
LA5744
SS GND
C3
1μF
VOS
D1
SBD
R2
R1
C2
390μF
Notes :
1. C3 is for the soft start function. Delete C3 and keep the SS pin open when the soft start function is not necessary.
2. In some cases, the output may not turn on if power is applied when a load is connected. If this is a problem, increase the value of
the inductor.
No.A0717-3/5
3Pages | |||
ページ | 合計 : 5 ページ | ||
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PDF ダウンロード | [ LA5744 データシート.PDF ] |
データシートを活用すると、その部品の主な機能と仕様を詳しく理解できます。 ピン構成、電気的特性、動作パラメータ、性能を確認してください。 |
部品番号 | 部品説明 | メーカ |
LA5744 | Monolithic Linear IC Separately-Excited Step-Down Switching Regulator | Sanyo Semicon Device |
LA5744 | Separately-Excited Step-Down Switching Regulator | ON Semiconductor |
LA5744MP | Monolithic Linear IC Separately-Excited Step-Down Switching Regulator | Sanyo Semicon Device |
LA5744TP | Monolithic Linear IC Separately-Excited Step-Down Switching Regulator | Sanyo Semicon Device |