參數(shù)資料
型號(hào)： LM2574
廠商： ON SEMICONDUCTOR
英文描述： 0.5 A, Adjustable Output Voltage, Step-Down Switching Regulator(0.5A,可調(diào)輸出電壓,降壓型開(kāi)關(guān)穩(wěn)壓器)
中文描述： 0.5甲，可調(diào)輸出電壓，降壓型開(kāi)關(guān)穩(wěn)壓器（0.5A的，可調(diào)輸出電壓，降壓型開(kāi)關(guān)穩(wěn)壓器）
文件頁(yè)數(shù)： 4/26頁(yè)
文件大小： 295K
代理商： LM2574
LM2574, NCV2574
http://onsemi.com
4
SYSTEM PARAMETERS
([Note 3] Test Circuit Figure 16)
ELECTRICAL CHARACTERISTICS (continued)
(Unless otherwise specified, V
in
= 12 V for the 3.3 V, 5.0 V, and
Adjustable version, V
in
= 25 V for the 12 V version, V
in
= 30 V for the 15 V version. I
Load
= 100 mA. For typical values T
J
= 25
°
C, for
min/max values T
J
is the operating junction temperature range that applies [Note 4], unless otherwise noted).
Characteristic
Symbol
Min
Typ
Max
Unit
ALL OUTPUT VOLTAGE VERSIONS
Feedback Bias Current V
out
= 5.0 V (Adjustable Version Only)
T
J
= 25
°
C
T
J
= 40 to +125
°
C
Oscillator Frequency (Note 5)
T
J
= 25
°
C
T
J
= 0 to +125
°
C
T
J
= 40 to +125
°
C
Saturation Voltage (I
out
= 0.5 A, [Note 6])
T
J
= 25
°
C
T
J
= 40 to +125
°
C
Max Duty Cycle (“on”) (Note 7)
I
b
nA
25
100
200
f
O
kHz
47
42
52
52
58
63
V
sat
V
1.0
1.2
1.4
DC
93
98
%
Current Limit Peak Current (Notes 5 and 6)
T
J
= 25
°
C
T
J
= 40 to +125
°
C
Output Leakage Current (Notes 8 and 9), T
J
= 25
°
C
Output = 0 V
Output = 1.0 V
I
CL
A
0.7
0.65
1.0
1.6
1.8
I
L
mA
0.6
10
2.0
30
Quiescent Current (Note 8)
T
J
= 25
°
C
T
J
= 40 to +125
°
C
Standby Quiescent Current (ON/OFF Pin = 5.0 V (“off”))
T
J
= 25
°
C
T
J
= 40 to +125
°
C
ON/OFF Pin Logic Input Level
V
out
= 0 V
T
J
= 25
°
C
T
J
= 40 to +125
°
C
Nominal Output Voltage
T
J
= 25
°
C
T
J
= 40 to +125
°
C
ON/OFF P
in
Input Current
ON/OFF P
in
= 5.0 V (“off”), T
J
= 25
°
C
ON/OFF P
in
= 0 V (“on”), T
J
= 25
°
C
3. External components such as the catch diode, inductor, input and output capacitors can affect the switching regulator system performance.
When the LM2574 is used as shown in the Figure 16 test circuit, the system performance will be as shown in the system parameters section
of the Electrical Characteristics.
4. Tested junction temperature range for the LM2574, NCV2574: T
low
= 40
°
C T
high
= +125
°
C.
5. The oscillator frequency reduces to approximately 18 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%.
6. Output (Pin 2) sourcing current. No diode, inductor or capacitor connected to the output pin.
7. Feedback (Pin 4) removed from output and connected to 0 V.
8. Feedback (Pin 4) removed from output and connected to 12 V for the Adjustable, 3.3 V, and 5.0 V versions, and 25 V for the 12 V and 15 V
versions, to force the output transistor OFF.
9. V
in
= 40 V.
I
Q
mA
5.0
9.0
11
I
stby
A
60
200
400
V
V
IH
2.2
2.4
1.4
V
IL
1.2
1.0
0.8
A
I
IH
I
IL
15
0
30
5.0
相關(guān)PDF資料
PDF描述
LM2575-33IKTGR 1-A SIMPLE STEP DOWN SWITCHING VOLTAGE REGULATOR
LM2575T-5 Precision Chopper-Stabilized Advanced LinCMOS(TM) Operational Amplifier 8-SOIC -55 to 125
LM2575T-12 EASY SWITCHERE⑩ 1.0 A STEP-DOWN VOLTAGE REGULATOR
LM2575D2T-15 EASY SWITCHERE⑩ 1.0 A STEP-DOWN VOLTAGE REGULATOR
LM2575D2T-ADJ EASY SWITCHERE⑩ 1.0 A STEP-DOWN VOLTAGE REGULATOR
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
LM2574 3.3V WAF 制造商:Motorola Inc 功能描述:
LM2574/D 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Easy Switcher? 0.5A Step-Down Voltage Regulator
LM2574_05 制造商:MICREL 制造商全稱:Micrel Semiconductor 功能描述:52kHz Simple 0.5A Buck Regulator
LM2574_06 制造商:ONSEMI 制造商全稱:ON Semiconductor 功能描述:0.5 A, Adjustable Output Voltage, Step−Down Switching Regulator
LM2574-12 制造商:Texas Instruments 功能描述:
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

*
*
*