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)： 8/22頁
文件大?。?/td> 327K
代理商： L4974
ELECTRICAL CHARACTERISTICS
(continued)
DC CHARACTERISTICS
Symbol
V
11on
V
11 Hyst
I
11Q
I
11OQ
I
20L
SOFT START(pin8)
Parameter
Test Condition
Min.
10
Typ.
11
1
13
16
Max.
12
Unit
V
V
mA
mA
mA
Fig.
7A
7A
7A
7A
7A
Turn-on Threshold
Turn-off Hysteresys
Quiescent Current
Operating Supply Current
Out Leak Current
V
8
= 0; S1 = D
V
8
= 0; S1 = B; S2 = B
V
i
= 55V; S3 = A; V
8
= 0
19
23
2
Symbol
I
8
V
8
Parameter
Test Condition
V
8
= 3V; V
9
= 0V
I
8
= 20mA;V
11
= 10V
I
8
= 200
μ
A; V
11
= 10V
Min.
80
Typ.
115
Max.
150
1
0.7
Unit
μ
A
V
V
Fig.
7B
7B
7B
SoftStart Source Current
Output Saturation Voltage
ERROR AMPLIFIER
Symbol
V
7H
Parameter
Test Condition
I
7
= -100
μ
A; S1 = C
V
9
= 4.7V
I
7
= 100
μ
A; S1 = C
V
9
= 5.3V;
V
7
= 1V;V
7
= 4.7V
V
7
= 6V;V
9
= 5.3V
S1 = B; R
S
= 10K
S1 = A; R
S
= 10
15 < V
i
< 50V
R
S
= 50
S1 = A
Min.
6
Typ.
Max.
Unit
V
Fig.
7C
High Level Out Voltage
V
7L
Low Level Out Voltage
1.2
V
7C
I
7H
-I
7L
I
9
G
V
SVR
V
OS
Source Output Current
SinkOutput Current
Input Bias Current
DC OpenLoop Gain
Supply Voltage Rejection
Input OffsetVoltage
100
100
150
150
0.4
μ
A
μ
A
μ
A
dB
dB
mV
7C
7C
7C
7C
7C
7C
3
60
60
80
2
10
RAMP GENERATOR(pin 18)
Symbol
V
18
V
18
Parameter
Test Condition
S1 = B; S2 = B
S1 = B
S2 = B
S1 = A; I
17
= 100
μ
A
S1 = A; I
17
= 1mA
Min.
1.2
Typ.
1.5
2.5
5.5
270
2.7
Max.
Unit
V
V
V
μ
A
mA
Fig.
7A
7A
7A
7A
7A
Ramp Valley
Ramp Peak
V
i
= 15V
V
i
= 45V
I
18
I
18
Min. Ramp Current
Max. Ramp Current
300
2.4
SYNCFUNCTION (pin 10)
Symbol
V
10
Parameter
Test Condition
V
i
= 15Vto 50V;V
8
= 0;
S1 = B; S2 = B; S4 = B
V
8
= 0;
S1 = B; S2 = B; S4 = B
V
10
= V
18
= 0.9V; S4 = B;
S1 = B; S2 = B
V
10
= 2.5V
Min.
–0.3
Typ.
Max.
0.9
Unit
V
Fig.
7A
Low Input Voltage
V
10
High Input voltage
2.5
5.5
V
7A
+I
10L
SyncInputCurrentwithLow
Input Voltage
Input Current with
Input Voltage
Output Amplitude
Output Pulse Width
0.4
mA
7A
+I
10H
High
1.5
mA
7A
V
10
t
W
4
5
V
μ
s
–
–
V
thr
= 2.5V
0.3
0.5
0.8
L4974A
8/22
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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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