參數(shù)資料
型號(hào)： LM2576T-ADJFLOWLB03
廠商： NATIONAL SEMICONDUCTOR CORP
元件分類(lèi)： 穩(wěn)壓器
英文描述： 3.5 A SWITCHING REGULATOR, 52 kHz SWITCHING FREQ-MAX, PSFM5
封裝： BENT STAGGERED, TO-220, 5 PIN
文件頁(yè)數(shù)： 21/24頁(yè)
文件大?。?/td> 750K
代理商： LM2576T-ADJFLOWLB03
All Output Voltage Versions
Electrical Characteristics (Continued)
Specifications with standard type face are for T
J = 25C, and those with boldface type apply over full Operating Temperature
Range. Unless otherwise specified, V
IN = 12V for the 3.3V, 5V, and Adjustable version, VIN = 25V for the 12V version, and VIN
= 30V for the 15V version. I
LOAD = 500 mA.
Symbol
Parameter
Conditions
LM2576-XX
Units
(Limits)
LM2576HV-XX
Typ
Limit
DEVICE PARAMETERS
θ
JA
Thermal Resistance
T Package, Junction to Ambient (Note 8)
65
θ
JA
T Package, Junction to Ambient (Note 9)
45
C/W
θ
JC
T Package, Junction to Case
2
θ
JA
S Package, Junction to Ambient (Note 10)
50
ON /OFF CONTROL Test Circuit Figure 2
V
IH
ON /OFF Pin
V
OUT = 0V
1.4
2.2/2.4
V(Min)
V
IL
Logic Input Level
V
OUT = Nominal Output Voltage
1.2
1.0/0.8
V(Max)
I
IH
ON /OFF Pin Input
ON /OFF Pin = 5V (OFF)
12
A
Current
30
A(Max)
I
IL
ON /OFF Pin = 0V (ON)
0A
10
A(Max)
Note 1: Absolute Maximum Ratings indicate limits beyond which damage to the device may occur. Operating Ratings indicate conditions for which the device is
intended to be functional, but do not guarantee specific performance limits. For guaranteed specifications and test conditions, see the Electrical Characteristics.
Note 2: All limits guaranteed at room temperature (standard type face) and at temperature extremes (bold type face). All room temperature limits are 100%
production tested. All limits at temperature extremes are guaranteed via correlation using standard Statistical Quality Control (SQC) methods.
Note 3: External components such as the catch diode, inductor, input and output capacitors can affect switching regulator system performance. When the
LM2576/LM2576HV is used as shown in the Figure 2 test circuit, system performance will be as shown in system parameters section of Electrical Characteristics.
Note 4: Output pin sourcing current. No diode, inductor or capacitor connected to output.
Note 5: Feedback pin removed from output and connected to 0V.
Note 6: Feedback pin removed from output and connected to +12V for the Adjustable, 3.3V, and 5V versions, and +25V for the 12V and 15V versions, to force the
output transistor OFF.
Note 7: VIN = 40V (60V for high voltage version).
Note 8: Junction to ambient thermal resistance (no external heat sink) for the 5 lead TO-220 package mounted vertically, with 12 inch leads in a socket, or on a PC
board with minimum copper area.
Note 9: Junction to ambient thermal resistance (no external heat sink) for the 5 lead TO-220 package mounted vertically, with 14 inch leads soldered to a PC board
containing approximately 4 square inches of copper area surrounding the leads.
Note 10: If the TO-263 package is used, the thermal resistance can be reduced by increasing the PC board copper area thermally connected to the package. Using
0.5 square inches of copper area,
θJA is 50C/W, with 1 square inch of copper area, θJA is 37C/W, and with 1.6 or more square inches of copper area, θJA is 32C/W.
Note 11: The oscillator frequency reduces to approximately 11 kHz in the event of an output short or an overload which causes the regulated output voltage to drop
approximately 40% from the nominal output voltage. This self protection feature lowers the average power dissipation of the IC by lowering the minimum duty cycle
from 5% down to approximately 2%.
Typical Performance Characteristics
(Circuit of Figure 2)
Normalized Output Voltage
Line Regulation
01147627
01147628
LM2576/LM2576HV
www.national.com
6
相關(guān)PDF資料
PDF描述
LM2576T-ADJLB03/NOPB 3 A SWITCHING REGULATOR, 52 kHz SWITCHING FREQ-MAX, SFM5
LM2576T-12FLOWLB03 3.5 A SWITCHING REGULATOR, 52 kHz SWITCHING FREQ-MAX, PSFM5
LM2576T-12/LB03 7.5 A SWITCHING REGULATOR, 63 kHz SWITCHING FREQ-MAX, PSFM5
LM2576HVT-ADJFLOWLB03/NOPB 7.5 A SWITCHING REGULATOR, 63 kHz SWITCHING FREQ-MAX, ZFM5
LM2576SX-12/NOPB 7.5 A SWITCHING REGULATOR, 63 kHz SWITCHING FREQ-MAX, PSSO5
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
LM2576T-ADJG 功能描述:直流/直流開(kāi)關(guān)調(diào)節(jié)器 3A 1.23-37V ADJ Buck PWM RoHS:否 制造商:International Rectifier 最大輸入電壓:21 V 開(kāi)關(guān)頻率:1.5 MHz 輸出電壓:0.5 V to 0.86 V 輸出電流:4 A 輸出端數(shù)量: 最大工作溫度: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:PQFN 4 x 5
LM2576T-ADJ-H 制造商:SEMTECH 制造商全稱:Semtech Corporation 功能描述:Voltage-Mode SMPS Controller
LM2576T-ADJLB03 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Voltage-Mode SMPS Controller
LM2576T-ADJ-V 制造商:SEMTECH 制造商全稱:Semtech Corporation 功能描述:Voltage-Mode SMPS Controller
LM2576TV 制造商:未知廠家 制造商全稱:未知廠家 功能描述:3.0A, 15V, Step-Down Switching Regulator
發(fā)布緊急采購(gòu)，3分鐘左右您將得到回復(fù)。

采購(gòu)需求

(若只采購(gòu)一條型號(hào)，填寫(xiě)一行即可)

發(fā)布成功！您可以繼續(xù)發(fā)布采購(gòu)。也可以進(jìn)入我的后臺(tái)，查看報(bào)價(jià)

發(fā)布成功！您可以繼續(xù)發(fā)布采購(gòu)。也可以進(jìn)入我的后臺(tái)，查看報(bào)價(jià)

*型號(hào) *數(shù)量 廠商 批號(hào) 封裝
添加更多采購(gòu)

我的聯(lián)系方式

*
*
*