L4938E 데이터 시트보기 (PDF) - STMicroelectronics
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L4938E Datasheet PDF : 12 Pages
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L4938E - L4938ED - L4938EPD
THERMAL DATA
Symbol
Parameter
DIP 12+2+2 SO 12+4+4 PowerSO20
Rth j-amb
Rth j-case
Thermal Resistance Junction to ambient
Thermal Resistance Junction to case
40
50
-
-
-
<2
Note 3: Typical value soldered on a PC board with 8cm2 copper ground plane (35mm thick).
Unit
°C/W
°C/W
PIN FUNCTIONS
PIN
(DIP 12+2+2)
14
15
16
1
2
3
4, 5, 12, 13
6
7
8
9
10
11
PIN
(SO 12+4+4)
18
19
20
1
2
3
4, 5, 6, 7, 14,
15, 16, 17
8
9
10
11
12
13
PIN
PowerSO20
3
4
5
6
7
8
1,10,11,20
14
15
16
17
18
2,9,19
Name
VS2
VS1
S1
PR
CT
EN
GND
RES
SO
OUT 1
ADJ
OUT 2
NC
Function
Supply Voltage (400mA Regulator)
Supply Voltage (100mA Regulator, Reset, Sense)
Sense Input
Reset Theresold Programming
Reset Delay Capacitor
Enable (low will activate the 400mA regulator)
Ground
Reset Output
Sense Output
100mA Regulator Output
Feedback of 400mA Regulator
400mA Regulator Output
Not Connected
ELECTRICAL CHARACTERISTICS (VS = 14V; Tj = -40 to 150°C unless otherwise specified.)
Symbol
Parameter
Test Condition
Min. Typ. Max.
OUT 1
VO1
VDP1
VOL01
VLIM1
IQSB
Supply Output Voltage
Dropoutput Voltage 1
Load Regulation 1
Current Limit 1
Quiescent Current in Standby
Mode
VS = 6 to 28V;
IO1 = 400µA to 100mA
Tj ≤125°C; IO1 = 50 to 400µA
IOUT1 = 10mA
IOUT1 = 100mA; VS = 4.8V
IOUT1 = 1 to 100mA
(after regulation setting)
VOUT1 = 0.8 to 4.5V
IEN ≥ 2.4V (output 2 disabled)
IO1 = 0.1mA; VSI > 1.3V
TJ < 85°C; RPR = 0
4.9
5
5.1
4.8
5
5.2
0.1
0.2
0.2
0.4
25
100 200 400
65
90
75
OUT 2
VO2
VDP2
VOL02
RADJ
ILIM2
IQ
Output Voltage 2
ADJ connected to OUT 2
Dropoutput Voltage 2
Load Regulation 2
Adjust Input Resistance
Current Limit 2
Quiescent Current
Enable = LOW; VS = 6 to 28V; 4.9
5.1
I02 = 5 to 400mA
IOUT2 = 100mA
0.2
0.3
IOUT2 = 400mA; VS = 4.8V
IOUT1 = 5 to 400mA
(after regulation setting)
0.3
0.6
50
60
100 150
V02 = 0.8 to 4.5V
450 650 1300
IOUT1 = 100mA; IOUT2 = 400mA
20
OUT1, OUT 2
VOLi 1,2 Line Regulation
VS = 6 to 28V; IO1 = 1mA,
20
IO2 = 5mA,
(after regulation setting)
Unit
V
V
V
V
mV
mA
µA
µA
V
V
V
mV
mA
mA
mA
mV
3/12
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