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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
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L4973
Electrical characteristics
Table 4. Electrical characteristics (continued)
(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
Soft start
Inhibit
Soft Start Charge
Current
Soft Start Discharge
Current
High Level Voltage
30 45 60 µA
15 22 30 µA
(2) 3.0
V
Low Level Voltage
Isource High Level
Isource Low Level
VINH = 3V
VINH = 0.8V
(2)
0.8 V
(2) 10 16 50 µA
(2) 10 15 50 µA
DC characteristics
Total Operating
Quiescent Current
Duty Cycle = 50%
4
6 mA
Quiescent Current
Duty Cycle = 0
Total stand-by quiescent VCC = 24V; VINH = 5V
current
VCC = 55V; VINH = 5V
2.7 4 mA
100 200 µA
150 300 µA
Error amplifier
High Level Output
Voltage
11.0
V
Low Level Output
Voltage
Source Bias Current
Source Output Current
Sink Output Current
Supply Voltage Ripple
Rejection
DC Open Loop Gain
Transconductance
VCOMP = VFB
CREF = 4.7µF 1-5mA load
current
RL =
Icomp = -0.1 to 0.1mA;
Vcomp = 6V
0.65 V
1
2
3
µA
200 300 600 µA
200 300
µA
60 80
dB
50 60
dB
2.5
mS
Oscillator section
Ramp valley
0.78 0.85 0.92 V
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