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參數(shù)資料
| 型號： | L4974 |
| 廠商： | 意法半導體 |
| 元件分類： | 基準電壓源/電流源 |
| 英文描述： | 3.5A SWITCHING REGULATOR |
| 中文描述： | 3.5A的開關穩(wěn)壓器 |
| 文件頁數(shù)： | 7/22頁 |
| 文件大?。?/td> | 327K |
| 代理商： | L4974 |
ELECTRICAL CHARACTERISTICS
(referto the test circuit, T
J
= 25
°
C,V
i
= 35V,R
4
= 30K
,
C
9
= 2.7nF,f
SW
= 100KHztyp, unless otherwisespecified)
DYNAMIC CHARACTERISTICS
Symbol
V
i
Parameter
Test Conditions
V
o
= V
ref
to 40V
I
o
= 3.5A(*)
V
i
=15V to 50V
I
o
= 2A;V
o
= V
ref
V
I
= 15V to 50V
I
o
= 1A; V
o
= V
ref
V
O
= V
ref
I
o
= 1A to 3.5A
I
o
= 2A to 3A
Min.
15
Typ.
Max.
50
Unit
V
Fig.
5
Input Volt.Range (pin 11)
V
o
Output Voltage
5
5.1
5.2
V
5
V
o
Line Regulation
12
30
mV
V
o
Load Regulation
8
4
25
10
0.4
0.7
5.5
mV
mV
V
V
d
Dropout Voltage between
Pin11 and 20
Max Limiting Current
I
o
= 2A
I
o
= 3.5A
V
i
= 15V to 50V
V
o
= V
ref
to 40V
I
o
= 3.5A,f = 100KHz
V
o
= V
ref
V
o
= 12V
V
i
= 2VRMS;I
o
= 5A
f = 100Hz;V
o
= V
ref
0.25
0.45
4.75
I
20L
4
A
η
Efficiency
80
85
90
60
%
%
dB
SVR
Supply Voltage Ripple
Rejection
Switching Frequency
Voltage
Switching
Frequency
Temperature Stability of
Switching Frequency
Maximum Operating
Switching Frequency
56
5
f
90
100
2
110
6
KHz
%
5
5
f/
Vi
Stability
of
V
i
= 15Vto 45V
f/T
j
T
j
= 0 to 125
°
C
1
%
5
f
max
V
o
= V
ref
R
4
= 15K
I
o
= 3.5AC
9
= 2.2nF
200
KHz
5
(*) Pulse testing with a low duty cycle
V
ref
SECTION(pin13)
Symbol
V
13
V
13
Parameter
Test Condition
Min.
5
Typ.
5.1
10
Max.
5.2
25
Unit
V
mV
Fig.
7
7
Reference Voltage
Line Regulation
V
i
= 15Vto 50V
V
13
Load Regulation
I
13
= 0 to 1mA
20
40
mV
7
V
13
T
Average
Coefficient
Voltage
Short Circuit Current Limit
Temperature
Reference
T
j
= 0
°
C to 125
°
C
0.4
mV/
°
C
7
I
13 short
V
13
= 0
70
mA
7
V
START
SECTION(pin15)
Symbol
V
14
V
14
Parameter
Test Condition
Min.
11.4
Typ.
12
0.6
Max.
12.6
1.4
Unit
V
V
Fig.
7
7
Reference Voltage
Line Regulation
V
i
= 15 to 50V
V
14
Load Regulation
I
14
= 0to 1mA
50
200
mV
7
I
14 short
Short Circuit Current Limit
V
15
= 0V
80
mA
7
L4974A
7/22
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相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| L4974A | 功能描述:直流/直流開關調(diào)節(jié)器 5.1 to 40V Step-Down RoHS:否 制造商:International Rectifier 最大輸入電壓:21 V 開關頻率: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 |
| L4974A | 制造商:STMicroelectronics 功能描述:IC SWITCHING REG 3.5A 4974 DIP20 |
| L4974AE | 制造商:STMicroelectronics 功能描述: |
| L4975 | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:5A SWITCHING REGULATOR |
| L4975A | 功能描述:直流/直流開關調(diào)節(jié)器 5.1 to 40V Step-Down RoHS:否 制造商:International Rectifier 最大輸入電壓:21 V 開關頻率: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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