L4973V5 Просмотр технического описания (PDF) - STMicroelectronics
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L4973V5 Datasheet PDF : 16 Pages
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L4973V3.3 - L4973V5.1 - L4973D3.3 - L4973D5.1
ELECTRICAL
ROSC = 20KΩ;
CHARACTERISTICS ( Refer
unless otherwise specified) •
to the test circuit,VCC = 24V; Tj = 25°C,
= specifications referred to TJ from 0 to
COSC =
125°C.
2.7nF;
Symbol
Parameter
Test Conditions
Min. Typ. Max. Unit
DYNAMIC CHARACTERISTICS
Input Voltage Range (*)
VO = VREF to 40V; IO = 3.5A
•
8
55
V
Output Voltage
L4973V5.1
Output Voltage
L4973V3.3
RDSON
Maximum Limiting Current
IO = 1A
IO = 0.5A to 3.5A
VCC = 8V to 55V
IO = 1A
IO = 0.5A to 3.5A
VCC = 8V to 40V
VCC = 10.5V
IO = 3.5A
VCC = 8V to 55V
5.05
5.1
5.15
V
5.00
5.1
5.20
V
• 4.95
5.1
5.25
V
3.326 3.36 3.393
V
3.292 3.36 3.427
V
• 3.26
3.36
3.46
V
0.15 0.22
Ω
•
0.35
Ω
•4
4.5
5.5
A
η
Efficiency
Switching Frequency
VO = 5.1V; IO = 3.5A
VO = 3.3V; IO = 3.5A
• 90
90
%
85
%
100
110
KHz
Supply Voltage Ripple
Rejection
Vi = VCC +2VRMS
VO = Vref; IO = 1A; fripple = 100Hz
∆fsw Switching Frequency Stability VCC = 8V to 55V
vs, Supply Voltage
60
2
dB
5
%
REFERENCE SECTION
Reference Voltage
Line Regulation
Load Regulation
Short Circuit Current
Iref = 0 to 20mA;
VCC = 8 to 55V
Iref = 0mA;
VCC = 8 to 55V
Vref = 0 to 5mA;
VCC = 0 to 20mA
5.025 5.1 5.175
V
• 4.950
5.1
5.250
V
5
10
mV
2
10
mV
6
25
mV
30
65
100
mA
SOFT START
Soft Start Charge Current
30
45
60
µA
Soft Start Discharge Current
15
22
30
µA
INHIBIT
High Level Voltage
Low Level Voltage
Isource High Level
Isource Low Level
DC CHARACTERISTICS
Total Operating Quiescent
Current
Quiescent Current
Total stand-by quiescent
current
ERROR AMPLIFIER
High Level Output Voltage
Low Level Output Voltage
Source Bias Current
Source Output Current
VINH = 3V
VINH = 0.8V
Duty Cycle = 50%
Duty Cycle = 0
VCC = 24V; VINH = 5V
VCC = 55V; VINH = 5V
• 3.0
V
•
0.8
V
• 10
16
50
µA
• 10
15
50
µA
4
6
mA
2.7
4
mA
100
200
µA
150
300
µA
11.0
V
0.65
V
1
2
3
µA
200
300
600
µA
4/16
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