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參數(shù)資料
| 型號： | NCV2574 |
| 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,降壓型開關(guān)穩(wěn)壓器) |
| 中文描述： | 0.5甲，可調(diào)輸出電壓，降壓型開關(guān)穩(wěn)壓器（0.5A的，可調(diào)輸出電壓，降壓型開關(guān)穩(wěn)壓器） |
| 文件頁數(shù)： | 4/26頁 |
| 文件大?。?/td> | 295K |
| 代理商： | NCV2574 |
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
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| NCV2574DW-ADJR2 | 功能描述:直流/直流開關(guān)調(diào)節(jié)器 ASECLSW REG RoHS:否 制造商:International Rectifier 最大輸入電壓:21 V 開關(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: 安裝風格:SMD/SMT 封裝 / 箱體:PQFN 4 x 5 |
| NCV2574DW-ADJR2G | 功能描述:直流/直流開關(guān)調(diào)節(jié)器 ASECLSW REG RoHS:否 制造商:International Rectifier 最大輸入電壓:21 V 開關(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: 安裝風格:SMD/SMT 封裝 / 箱體:PQFN 4 x 5 |
| NCV2574DW-ADJR2G | 制造商:ON Semiconductor 功能描述:Switching Regulator |
| NCV2575 | 制造商:ONSEMI 制造商全稱:ON Semiconductor 功能描述:1.0 A, Adjustable Output Voltage, Step-Down Switching Regulator |
| NCV2575D2T-12G | 功能描述:直流/直流開關(guān)調(diào)節(jié)器 ANA 12V 1A PW SW REG RoHS:否 制造商:International Rectifier 最大輸入電壓:21 V 開關(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: 安裝風格:SMD/SMT 封裝 / 箱體:PQFN 4 x 5 |
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