L4973 STMicroelectronics, L4973 Datasheet - Page 6

• Manufacturer Part Number: L4973
• Description: 3.5A STEP DOWN SWITCHING REGULATOR
• Manufacturer: STMicroelectronics

Electrical characteristics
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Electrical characteristics
Table 4. Electrical characteristics
(Refer to the test circuit,V
unless otherwise specified)
Dynamic characteristics
Reference section
Symbol
∆f
η
sw
Input Voltage Range
Output Voltage
L4973V5.1
Output Voltage
L4973V3.3
R
Maximum Limiting
Current
Efficiency
Switching Frequency
Supply Voltage Ripple
Rejection
Switching Frequency
Stability vs., Supply
Voltage
Reference Voltage
Line Regulation
Load Regulation
Short Circuit Current
DS(on )
Parameter
CC
= 24V; T
(1)
V
I
I
to 55V
I
I
to 40V
V
V
V
V
V
I
V
I
V
I
V
V
V
O
O
O
O
O
ref
ref
O
CC
CC
O
O
i
CC
CC
CC
ref
CC
= V
= 1A
= 0.5A to 3.5A V
= 1A
= 0.5A to 3.5A V
= 1A; f
= 0 to 20mA;
= 0mA;
= V
= 5.1V; I
= 3.3V; I
J
= 0 to 5mA;
= 10.5V I
= 8V to 55V
= 8V to 55V
= 8 to 55V
= 8 to 55V
= 0 to 20mA
= 25°C, C
CC
REF
+2V
Test condition
ripple
to 40V; I
O
O
RMS
O
= 3.5A
= 3.5A
= 100Hz
= 3.5A
OSC
V
O
O
CC
CC
= V
= 3.5A
= 2.7nF; R
= 8V
= 8V
ref
;
(2)
(2)
(2)
(2)
(2)
(2)
(2)
OSC
3.326
3.292
5.025
4.950
5.05
5.00
4.95
3.26
Min
3.8
90
60
30
8
4
= 20KΩ;
3.36 3.393
3.36 3.427
3.36
0.15
Typ
100
5.1
5.1
5.1
4.5
4.5
5.1
5.1
90
85
65
2
5
2
6
5.175
5.250
5.15
5.20
5.25
3.46
Max
0.22
0.35
110
100
5.5
5.5
55
10
10
25
5
L4973
Unit
KHz
mV
mV
mV
mA
dB
%
%
%
Ω
Ω
V
V
V
V
V
V
V
A
A
V
V