參數(shù)資料
型號(hào)： L4973V3.3
廠商： STMICROELECTRONICS
元件分類： 穩(wěn)壓器
英文描述： 5.5 A SWITCHING REGULATOR, 300 kHz SWITCHING FREQ-MAX, PDIP18
封裝： LEAD FREE, PLASTIC, DIP-18
文件頁數(shù)： 25/28頁
文件大小： 637K
代理商： L4973V3.3
Electrical characteristics
L4973
6/28
4
Electrical characteristics
Table 4.
Electrical characteristics
(Refer to the test circuit,VCC = 24 V; TJ = 25 °C, COSC = 2.7 nF;
ROSC = 20 kΩ; unless otherwise specified)
Symbol
Parameter
Test condition
Min
Typ
Max
Unit
Dynamic characteristics
Input voltage range (1)
VO = VREF to 40 V; IO = 3.5A
(2)
855
V
Output voltage
L4973V5.1
IO = 1 A
5.05
5.1
5.15
V
IO = 0.5 A to 3.5 A VCC = 8 V
to 55 V
5.00
5.1
5.20
V
(2)
4.95
5.1
5.25
V
Output voltage
L4973V3.3
IO = 1 A
3.326
3.36
3.393
V
IO = 0.5 A to 3.5 A VCC = 8 V
to 40 V
3.292
3.36
3.427
V
(2)
3.26
3.36
3.46
V
RDS(on )
VCC = 10.5 V IO = 3.5 A
0.15
0.22
Ω
(2)
0.35
Ω
Maximum limiting
current
VCC = 8 V to 55 V
(2)
3.8
4.5
5.5
A
4
4.5
5.5
A
η
Efficiency
VO = 5.1 V; IO = 3.5 A
90
%
VO = 3.3 V; IO = 3.5 A
85
%
Switching frequency
(2)
90
100
110
kHz
Supply voltage ripple
rejection
Vi = VCC+2 VRMS VO = Vref;
IO = 1 A; fripple = 100 Hz
60
dB
Δf
sw
Switching frequency
stability vs., supply
voltage
VCC = 8 V to 55 V
2
5
%
Reference section
Reference voltage
Iref = 0 to 20 mA;
VCC = 8 to 55 V
5.025
5.1
5.175
V
(2)
4.950
5.1
5.250
V
Line regulation
Iref = 0 mA;
VCC = 8 to 55 V
5
10
mV
Load regulation
Vref = 0 to 5 mA;
VCC = 0 to 20 mA
2
6
10
25
mV
Short circuit current
30
65
100
mA
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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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