L4938ED STMicroelectronics, L4938ED Datasheet - Page 6

• Manufacturer Part Number: L4938ED
• Description: IC VREG ADVANCED DUAL SO-20
• Manufacturer: STMicroelectronics

Specifications of L4938ED

• 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: Surface Mount
• Package / Case: 20-SOIC (7.5mm Width)
• Polarity: Positive
• Number Of Outputs: 2
• Output Type: Fixed
• Output Voltage: 5 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: SMD/SMT
• Reference Voltage: 1.23 V
• Voltage Regulation Accuracy: 2 %
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Block diagram and pin description
6/20
Table 2.
4, 5, 6, 7, 14, 15,
SO-20
16, 17
18
19
20
10
11
12
13
1
2
3
8
9
PIn number
Pin definitions and functions
PowerSO-20
1, 10, 11, 20
2, 9, 19
14
15
16
17
18
3
4
5
6
7
8
Doc ID 17243 Rev 1
Name
OUT1
OUT2
GND
RES
ADJ
V
V
SO
NC
PR
CT
EN
SI
S2
S1
Supply voltage (400 mA regulator)
Supply voltage (100 mA regulator, reset, sense)
Sense input
Reset threshold programming
Reset delay capacitor
Enable (low activates the 400 mA regulator)
Ground
Reset output
Sense output
100 mA regulator output
Feedback of 400 mA regulator
400 mA regulator output
Not connected
Function
L4938ED, L4938EPD