L4938E STMicroelectronics, L4938E Datasheet - Page 3

• Manufacturer Part Number: L4938E
• Description: IC REG LDO DUAL 5V/ADV 16DIP
• Manufacturer: STMicroelectronics

Specifications of L4938E

• Regulator Topology: Positive Fixed and Adjustable
• Voltage - Output: 5V, 4.9 ~ 5.1 V
• Voltage - Input: Up to 28V
• Voltage - Dropout (typical): 0.2V @ 100mA, 0.3V @ 400mA
• Number Of Regulators: 2
• Current - Output: 100mA, 400mA
• Current - Limit (min): 100mA, 450mA
• Operating Temperature: -40°C ~ 150°C
• Mounting Type: Through Hole
• Package / Case: 20-SOIC (7.5mm Width)
• Polarity: Positive
• Number Of Outputs: 2
• Output Type: Fixed
• Output Voltage: 5.1 V
• Output Current: 5 mA
• Line Regulation: 20 mV
• Load Regulation: 50 mV
• Dropout Voltage (max): 0.2 V
• Input Voltage Max: 20 V
• Maximum Operating Temperature: + 150 C
• Minimum Operating Temperature: - 40 C
• Maximum Power Dissipation: 875 mW
• Mounting Style: Through Hole
• Reference Voltage: 1.23 V
• Voltage Regulation Accuracy: 2 %
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Other names: 497-3355-5; 497-3914-5; 497-3914-5

THERMAL DATA
Note 3: Typical value soldered on a PC board with 8cm
PIN FUNCTIONS
ELECTRICAL CHARACTERISTICS (V
OUT 1
OUT 2
OUT1, OUT 2
(DIP 12+2+2)
4, 5, 12, 13
Symbol
V
Symbol
V
V
V
R
R
V
V
R
I
I
V
V
OLi 1,2
LIM2
QSB
OL01
OL02
LIM1
I
th j-case
PIN
DP1
DP2
th j-amb
ADJ
O1
O2
Q
14
15
16
10
11
1
2
3
6
7
8
9
Supply Output Voltage
Dropoutput Voltage 1
Load Regulation 1
Current Limit 1
Quiescent Current in Standby
Mode
Output Voltage 2
ADJ connected to OUT 2
Dropoutput Voltage 2
Load Regulation 2
Adjust Input Resistance
Current Limit 2
Quiescent Current
Line Regulation
Thermal Resistance Junction to ambient
Thermal Resistance Junction to case
4, 5, 6, 7, 14,
(SO 12+4+4)
15, 16, 17
PIN
18
19
20
10
11
12
13
1
2
3
8
9
Parameter
PowerSO20
1,10,11,20
2,9,19
Parameter
PIN
14
15
16
17
18
3
4
5
6
7
8
S
2
= 14V; T
copper ground plane (35mm thick).
V
I
T
I
I
I
(after regulation setting)
VOUT1 = 0.8 to 4.5V
I
I
T
Enable = LOW; V
I
I
I
I
(after regulation setting)
V02 = 0.8 to 4.5V
I
V
I
(after regulation setting)
OUT 1
OUT 2
O1
OUT1
OUT1
OUT1
EN
O1
02
OUT2
OUT2
OUT1
OUT1
O2
Name
GND
j
J
RES
S
S
VS2
VS1
ADJ
SO
NC
PR
CT
EN
S1
< 85 C; R
= 5 to 400mA
= 6 to 28V;
= 6 to 28V; I
= 400 A to 100mA
= 0.1mA; V
= 5mA,
125 C; I
= 10mA
= 100mA; V
= 1 to 100mA
2.4V (output 2 disabled)
= 100mA
= 400mA; V
= 5 to 400mA
= 100mA; I
j
Test Condition
= -40 to 150 C unless otherwise specified.)
O1
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
PR
= 50 to 400 A
SI
O1
= 0
OUT2
S
> 1.3V
S
S
= 1mA,
= 4.8V
= 4.8V
= 6 to 28V;
DIP 12+2+2 SO 12+4+4 PowerSO20
= 400mA
40
-
L4938E - L4938ED - L4938EPD
Min.
Function
100
450
4.9
4.8
4.9
60
50
-
Typ.
200
100
650
0.2
0.1
0.2
0.3
65
75
5
5
<2
-
Max.
1300
400
150
5.1
5.2
0.2
0.4
5.1
0.3
0.6
25
90
50
20
20
Unit
Unit
C/W
C/W
mV
mA
mV
mA
mA
mA
mV
V
V
V
V
V
V
V
A
A
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