L4974A STMicroelectronics, L4974A Datasheet - Page 16

• Manufacturer Part Number: L4974A
• Description: IC REG SW 3.5A 5.1V-40V 20-DIP
• Manufacturer: STMicroelectronics
• Type: Step-Down (Buck)r

Specifications of L4974A

• Internal Switch(s): Yes
• Synchronous Rectifier: No
• Number Of Outputs: 1
• Voltage - Output: 5.1 ~ 40 V
• Current - Output: 3.5A
• Frequency - Switching: 100kHz
• Voltage - Input: 15 ~ 50 V
• Operating Temperature: 0°C ~ 125°C
• Mounting Type: Through Hole
• Package / Case: 20-DIP (0.300", 7.62mm)
• Power - Output: 1.3W
• Output Voltage: 40 V
• Output Current: 3.5 A
• Input Voltage: 15 V to 50 V
• Switching Frequency: 90 KHz to 110 KHz
• Operating Temperature Range: - 40 C to + 150 C
• Mounting Style: Through Hole
• Duty Cycle (max): 90 %
• No. Of Outputs: 1
• Power Dissipation Pd: 5W
• No. Of Pins: 20
• Filter Terminals: Through Hole
• Rohs Compliant: Yes
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: 497-6699-5; L4974A

Figure 24 : Dropout Voltage between Pin 11 and
Figure 26 : Power Dissipation (device only) vs.
L4974A
Figure 22 : Line Transient Response (see fig. 5).
16/22
Pin 20 vs. Current at Pin 20.
Input Voltage.
Figure 23 : Load Transient Response (see fig. 5).
Figure 25 : .Dropout Voltage between Pin 11 and
Figure 27 : Power Dissipation (device only) vs.
Pin 20 vs. Junction Temperature.
Input Voltage.