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E-L4973D3.3 View Datasheet(PDF) - STMicroelectronics

Part NameDescriptionManufacturer
E-L4973D3.3 3.5A step down switching regulator ST-Microelectronics
STMicroelectronics ST-Microelectronics
E-L4973D3.3 Datasheet PDF : 27 Pages
1 2 3 4 5 6 7 8 9 10 Next Last
Electrical characteristics
4
Electrical characteristics
L4973
Table 4. Electrical characteristics
(Refer to the test circuit,VCC = 24V; TJ = 25°C, COSC = 2.7nF; ROSC = 20K;
unless otherwise specified)
Symbol
Parameter
Test condition
Min Typ Max Unit
Dynamic characteristics
Input Voltage Range (1) VO = VREF to 40V; IO = 3.5A (2) 8
55
V
Output Voltage
L4973V5.1
IO = 1A
5.05 5.1 5.15 V
IO = 0.5A to 3.5A VCC = 8V
5.00 5.1 5.20 V
to 55V
(2) 4.95 5.1 5.25 V
Output Voltage
L4973V3.3
IO = 1A
3.326 3.36 3.393 V
IO = 0.5A to 3.5A VCC = 8V
3.292 3.36 3.427 V
to 40V
(2) 3.26 3.36 3.46 V
RDS(on )
VCC = 10.5V IO = 3.5A
(2)
0.15 0.22
0.35
Maximum Limiting
Current
VCC = 8V to 55V
η Efficiency
VO = 5.1V; IO = 3.5A
VO = 3.3V; IO = 3.5A
Switching Frequency
(2) 3.8 4.5 5.5
A
4 4.5 5.5 A
90
%
85
%
(2) 90 100 110 KHz
Supply Voltage Ripple
Rejection
Switching Frequency
fsw Stability vs., Supply
Voltage
Vi = VCC+2VRMS VO = Vref;
IO = 1A; fripple = 100Hz
VCC = 8V to 55V
60
dB
2
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
(2) 4.950 5.1 5.250 V
5 10 mV
2 10 mV
6 25 mV
30 65 100 mA
6/27
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