參數(shù)資料
型號(hào)： L4973D5.1
廠商： 意法半導(dǎo)體
英文描述： 3.5A Step Down Switching Regulator(3.5A步降開關(guān)穩(wěn)壓器)
中文描述： 3.5A的降壓開關(guān)穩(wěn)壓器（3.5A的步降開關(guān)穩(wěn)壓器）
文件頁(yè)數(shù)： 4/16頁(yè)
文件大?。?/td> 252K
代理商： L4973D5.1
ELECTRICAL CHARACTERISTICS
( Refer to the test circuit,V
CC
= 24V; T
j
= 25
°
C, C
OSC
= 2.7nF;
R
OSC
= 20K
; unless otherwise specified)
= specifications referred to T
J
from 0 to 125°C.
Symbol
Parameter
Test Conditions
Min.
Typ.
Max.
Unit
DYNAMIC CHARACTERISTICS
Input Voltage Range (*)
Output Voltage
L4973V5.1
V
O
= V
REF
to 40V; I
O
= 3.5A
8
55
V
I
O
= 1A
I
O
= 0.5A to 3.5A
V
CC
= 8V to 55V
I
O
= 1A
I
O
= 0.5A to 3.5A
V
CC
= 8V to 40V
V
CC
= 10.5V
I
O
= 3.5A
V
CC
= 8V to 55V
V
O
= 5.1V; I
O
= 3.5A
V
O
= 3.3V; I
O
= 3.5A
5.05
5.00
4.95
3.326
3.292
3.26
5.1
5.1
5.1
3.36
3.36
3.36
0.15
5.15
5.20
5.25
3.393
3.427
3.46
0.22
0.35
5.5
V
V
V
V
V
V
A
%
%
Output Voltage
L4973V3.3
R
DSON
Maximum Limiting Current
Efficiency
4
4.5
90
85
100
η
Switching Frequency
Supply Voltage Ripple
Rejection
Switching Frequency Stability
vs, Supply Voltage
90
60
110
KHz
dB
V
i
= V
CC
+2V
RMS
V
O
= V
ref
; I
O
= 1A; f
ripple
= 100Hz
V
CC
= 8V to 55V
f
sw
2
5
%
REFERENCE SECTION
Reference Voltage
5.025
4.950
5.1
5.1
5.175
5.250
V
V
I
ref
= 0 to 20mA;
V
CC
= 8 to 55V
I
ref
= 0mA;
V
CC
= 8 to 55V
V
ref
= 0 to 5mA;
V
CC
= 0 to 20mA
Line Regulation
5
10
mV
Load Regulation
2
6
10
25
100
mV
mV
mA
Short Circuit Current
30
65
SOFT START
Soft Start Charge Current
30
45
60
μ
A
μ
A
Soft Start Discharge Current
15
22
30
INHIBIT
High Level Voltage
Low Level Voltage
I
source
High Level
I
source
Low Level
3.0
V
V
μ
A
μ
A
0.8
50
50
V
INH
= 3V
V
INH
= 0.8V
10
10
16
15
DC CHARACTERISTICS
Total Operating Quiescent
Current
Quiescent Current
Total stand-by quiescent
current
Duty Cycle = 50%
4
6
mA
Duty Cycle = 0
V
CC
= 24V; V
INH
= 5V
V
CC
= 55V; V
INH
= 5V
2.7
100
150
4
mA
μ
A
μ
A
200
300
ERROR AMPLIFIER
High Level Output Voltage
Low Level Output Voltage
Source Bias Current
Source Output Current
11.0
V
V
μ
A
μ
A
0.65
3
600
1
2
200
300
L4973V3.3 - L4973V5.1 - L4973D3.3 - L4973D5.1
4/16
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
L4973V3 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:3.5A STEP DOWN SWITCHING REGULATOR
L4973V3.3 功能描述:直流/直流開關(guān)調(diào)節(jié)器 3.3V 3.5A 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
L4973V3.3-L4973V5.1 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:3.5A STEP DOWN SWITCHING REGULATOR
L4973V33 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:3.5A STEP DOWN SWITCHING REGULATOR
L4973V33-L4973V51 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:3.5A STEP DOWN SWITCHING REGULATOR
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