參數(shù)資料
型號(hào)： 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(yè)數(shù)： 20/22頁(yè)
文件大?。?/td> 6679K
代理商： L4974A
ELECTRICAL CHARACTERISTICS (refer to the test circuit, TJ = 25°C, Vi = 35V, R4 = 30K
,
C9 = 2.7nF, fSW = 100KHz typ, unless otherwise specified)
DYNAMIC CHARACTERISTICS
Symbol
Parameter
Test Conditions
Min.
Typ.
Max.
Unit
Fig.
Vi
Input Volt. Range (pin 11)
Vo = Vref to 40V
Io = 3.5A (*)
15
50
V
5
Vo
Output Voltage
Vi =15V to 50V
Io = 2A; Vo = Vref
55.1
5.2
V
5
Vo
Line Regulation
VI = 15V to 50V
Io = 1A; Vo = Vref
12
30
mV
Vo
Load Regulation
VO = Vref Io = 1A to 3.5A
Io = 2A to 3A
825
mV
410
mV
Vd
Dropout Voltage between
Pin 11 and 20
Io = 2A
Io = 3.5A
0.25
0.45
0.4
0.7
V
I20L
Max Limiting Current
Vi = 15V to 50V
Vo = Vref to 40V
4
4.75
5.5
A
η
Efficiency
Io = 3.5A, f = 100KHz
Vo = Vref
Vo = 12V
80
85
90
%
SVR
Supply Voltage Ripple
Rejection
Vi = 2VRMS; Io = 5A
f = 100Hz; Vo = Vref
56
60
dB
5
f
Switching Frequency
90
100
110
KHz
5
f/Vi
Voltage
Stability
of
Switching
Frequency
Vi = 15V to 45V
2
6
%
5
f/Tj
Temperature Stability of
Switching Frequency
Tj = 0 to 125°C
1
%
5
fmax
Maximum Operating
Switching Frequency
Vo = Vref R4 = 15K
Io = 3.5A C9 = 2.2nF
200
KHz
5
(*) Pulse testing with a low duty cycle
Vref SECTION (pin 13)
Symbol
Parameter
Test Condition
Min.
Typ.
Max.
Unit
Fig.
V13
Reference Voltage
5
5.1
5.2
V
7
V13
Line Regulation
Vi = 15V to 50V
10
25
mV
7
V13
Load Regulation
I13 = 0 to 1mA
20
40
mV
7
V13
T
Average
Temperature
Coefficient
Reference
Voltage
Tj = 0
°C to 125°C
0.4
mV/
°C7
I13 short
Short Circuit Current Limit
V13 = 0
70
mA
7
VSTART SECTION (pin 15)
Symbol
Parameter
Test Condition
Min.
Typ.
Max.
Unit
Fig.
V14
Reference Voltage
11.4
12
12.6
V
7
V14
Line Regulation
Vi = 15 to 50V
0.6
1.4
V
7
V14
Load Regulation
I14 = 0 to 1mA
50
200
mV
7
I14 short
Short Circuit Current Limit
V15 = 0V
80
mA
7
L4974A
7/22
相關(guān)PDF資料
PDF描述
L4976 2.5 A SWITCHING REGULATOR, 300 kHz SWITCHING FREQ-MAX, PDIP8
L4976D013TR 2.5 A SWITCHING REGULATOR, 300 kHz SWITCHING FREQ-MAX, PDSO16
L4977A 11 A SWITCHING REGULATOR, 500 kHz SWITCHING FREQ-MAX, PZFM15
L4978D013TR 3.5 A SWITCHING REGULATOR, 300 kHz SWITCHING FREQ-MAX, PDSO16
L4978 3.5 A SWITCHING REGULATOR, 300 kHz SWITCHING FREQ-MAX, PDIP8
相關(guān)代理商/技術(shù)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(guān)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(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(fēng)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
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

*
*
*