L4938ED 데이터 시트보기 (PDF) - STMicroelectronics
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L4938ED Datasheet PDF : 20 Pages
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Electrical specifications
L4938ED, L4938EPD
2.2
Note:
Thermal data
Table 4. Thermal data
Symbol
Parameter
Rthj-amb
Rthj-case
Thermal resistance junction to ambient
Thermal resistance junction to case
SO-20
50
-
PowerSO-20
-
<2
Unit
°C/W
°C/W
Typical value soldered on a PC board with 8 cm2 copper ground plane (35 mm thick).
2.3
Electrical characteristics
VS = 14 V; Tj = -40 to 150 °C, unless otherwise specified.
Table 5.
Symbol
OUT1
Parameter
Test condition
Min. Typ. Max. Unit
VO1 Supply output voltage
VDP1 Drop output voltage 1
VOL01
VLIM1
Load regulation 1
Current limit 1
IQSB
Quiescent current in
standby mode
VS = 6 to 28 V;
IO1 = 400 µA to 100 mA
TJ ≤ 125°C;
IO1 = 50 to 400 µA
IOUT1 = 10 mA
IOUT1 = 100 mA; VS = 4.8 V
IOUT1 = 1 to 100 mA (after
regulation setting)
4.9 5 5.1 V
4.8 5 5.2 V
0.1 0.2 V
0.2 0.4 V
25 mV
VOUT1 = 0.8 to 4.5 V
100 200 400 mA
IEN ≥ 2.4 V (output 2 disabled)
IO1 = 0.1 mA; VSI > 1.3 V
65 90 µA
TJ < 85 °C; RPR = 0
75
µA
Table 6. OUT2
Symbol
Parameter
VO2
Output voltage 2 ADJ
connected to OUT2
VDP2 Drop output voltage 2
VOL02
RADJ
ILIM2
IQ
Load regulation 2
Adjust input resistance
Current limit 2
Quiescent current
Test condition
Enable = low; VS = 6 to 28 V;
IO2 = 5 to 400 mA
IOUT2 = 100 mA
IOUT2 = 400 mA; VS = 4.8 V
IOUT1 = 5 to 400 mA
(after regulation setting)
V02 = 0.8 to 4.5 V
IOUT1 = 100 mA;
IOUT2 = 400 mA
Min. Typ. Max. Unit
4.9
5.1 V
0.2 0.3 V
0.3 0.6 V
50 mV
60 100 150 mA
450 650 1300 mA
20 mA
8/20
Doc ID 17243 Rev 2
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