L4976D データシートの表示（PDF） - STMicroelectronics
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L4976D Datasheet PDF : 17 Pages
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Electrical characteristics
4
Electrical characteristics
L4976
Table 5. Electrical characteristics
(TJ = 25°C, COSC = 2.7nF, ROSC = 20kΩ, VCC = 24V, unless otherwise specified.)
Symbol
Parameter
Test condition
Min Typ Max Unit
Dynamic characteristic
VI
Operating input voltage range
VO = 3.3 to 50V; IO = 1A (1)
8
55
V
IO = 0.5A
3.33 3.36 3.39 V
VO
Output voltage
IO = 0.2 to 1A
VCC = 8 to 55V (1)
3.292 3.36 3.427 V
3.22 3.36 3.5 V
Vd
Dropout voltage
VCC = 10V; IO = 1A
(1)
0.29 0.367 V
0.587 V
Il
Maximum limiting current
VCC = 8 to 55V (1)
1.5
2
2.5
A
Efficiency
VO = 3.3V; IO = 1A
85
%
fs
Switching frequency
(1)
90 100 110 KHz
SVRR
Supply voltage ripple rejection
Voltage stability of switching
frequency
Temp. stability of switching
frequency
VI = VCC + 2VRMS; VO = Vref;
IO = 1.A; fripple = 100Hz
60
VCC = 8 to 55V
3
TJ = 0 to 125°C
4
dB
6
%
%
Reference section
Reference voltage
Line regulation
Load regulation
Short circuit current
Iref = 0 to 10mA; (1)
VCC = 8 to 55V
Iref = 0mA;
VCC = 8 to 55V
Vref = 0 to 5mA;
VCC = 0 to 20mA
5.0 5.1 5.2 V
4.950 5.1 5.250 V
5
10
mV
2
10 mV
6
25 mV
30 65 100 mA
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