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參數(shù)資料
| 型號： | L4974A |
| 廠商： | STMICROELECTRONICS |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | 5.5 A SWITCHING REGULATOR, 200 kHz SWITCHING FREQ-MAX, PDIP20 |
| 封裝： | POWER, PLASTIC, DIP-20 |
| 文件頁數(shù)： | 21/22頁 |
| 文件大?。?/td> | 6679K |
| 代理商： | L4974A |
ELECTRICAL CHARACTERISTICS (continued)
DC CHARACTERISTICS
Symbol
Parameter
Test Condition
Min.
Typ.
Max.
Unit
Fig.
V11on
Turn-on Threshold
10
11
12
V
7A
V11 Hyst
Turn-off Hysteresys
1
V
7A
I11Q
Quiescent Current
V8 = 0; S1 = D
13
19
mA
7A
I11OQ
Operating Supply Current
V8 = 0; S1 = B; S2 = B
16
23
mA
7A
I20L
Out Leak Current
Vi = 55V; S3 = A; V8 = 0
2
mA
7A
SOFT START (pin 8)
Symbol
Parameter
Test Condition
Min.
Typ.
Max.
Unit
Fig.
I8
Soft Start Source Current
V8 = 3V; V9 = 0V
80
115
150
A7B
V8
Output Saturation Voltage
I8 = 20mA; V11 = 10V
I8 = 200
A; V11 = 10V
1
0.7
V
7B
ERROR AMPLIFIER
Symbol
Parameter
Test Condition
Min.
Typ.
Max.
Unit
Fig.
V7H
High Level Out Voltage
I7 = -100
A; S1 = C
V9 = 4.7V
6V
7C
V7L
Low Level Out Voltage
I7 = 100
A; S1 = C
V9 = 5.3V;
1.2
V
7C
I7H
Source Output Current
V7 = 1V; V7 = 4.7V
100
150
A7C
-I7L
Sink Output Current
V7 = 6V; V9 = 5.3V
100
150
A7C
I9
Input Bias Current
S1 = B; RS = 10K
0.4
3
A7C
GV
DC Open Loop Gain
S1 = A; RS = 10
60
dB
7C
SVR
Supply Voltage Rejection
15 < Vi < 50V
60
80
dB
7C
VOS
Input Offset Voltage
RS = 50
S1 = A
2
10
mV
7C
RAMP GENERATOR (pin 18)
Symbol
Parameter
Test Condition
Min.
Typ.
Max.
Unit
Fig.
V18
Ramp Valley
S1 = B; S2 = B
1.2
1.5
V
7A
V18
Ramp Peak
S1 = B
Vi = 15V
S2 = B
Vi = 45V
2.5
5.5
V
7A
I18
Min. Ramp Current
S1 = A; I17 = 100
A
270
300
A7A
I18
Max. Ramp Current
S1 = A; I17 = 1mA
2.4
2.7
mA
7A
SYNC FUNCTION (pin 10)
Symbol
Parameter
Test Condition
Min.
Typ.
Max.
Unit
Fig.
V10
Low Input Voltage
Vi = 15V to 50V; V8 = 0;
S1 = B; S2 = B; S4 = B
–0.3
0.9
V
7A
V10
High Input voltage
V8 = 0;
S1 = B; S2 = B; S4 = B
2.5
5.5
V
7A
+I10L
Sync Input Current with Low
Input Voltage
V10 = V18 = 0.9V; S4 = B;
S1 = B; S2 = B
0.4
mA
7A
+I10H
Input Current with High
Input Voltage
V10 = 2.5V
1.5
mA
7A
V10
Output Amplitude
4
5
V
–
tW
Output Pulse Width
Vthr = 2.5V
0.3
0.5
0.8
s–
L4974A
8/22
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相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| 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 |
| L4975A | 制造商:STMicroelectronics 功能描述:SWITCHING REG 5A 4975 MULTIWATT15 |
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