L4973D5.1 STMicroelectronics, L4973D5.1 Datasheet - Page 10

• Manufacturer Part Number: L4973D5.1
• Description: IC REG SW 3.5A STEPDOWN 20-SOIC
• Manufacturer: STMicroelectronics
• Type: Step-Down (Buck)r

Specifications of L4973D5.1

• Internal Switch(s): Yes
• Synchronous Rectifier: No
• Number Of Outputs: 1
• Voltage - Output: 5.1V, 5.1 ~ 50 V
• Current - Output: 3.5A
• Frequency - Switching: 100kHz ~ 300kHz
• Voltage - Input: 8 ~ 55 V
• Operating Temperature: -40°C ~ 150°C
• Mounting Type: Surface Mount
• Package / Case: 20-SOIC (7.5mm Width)
• Power - Output: 4W
• Output Voltage: 5.1 V
• Output Current: 3.5 A
• Input Voltage: 8 V to 55 V
• Switching Frequency: 90 KHz to 110 KHz
• Operating Temperature Range: - 40 C to + 150 C
• Mounting Style: SMD/SMT
• Duty Cycle (max): 97 %
• Current, Input Bias: 2 μA
• Current, Output: 300 μA
• Current, Supply: 2.7 mA
• Frequency, Oscillator: 100 kHz
• Package Type: SO-20
• Power Dissipation: 4 W
• Regulation, Line: 5 mV
• Regulation, Load: 2 mV
• Regulator Type: Switching
• Temperature, Operating, Range: -40 to +150 °C
• Transconductance: 2.5
• Voltage, Gain: 60 dB
• Voltage, Input: 55 V
• Voltage, Output: 5.1 V
• Voltage, Output, High: 3 V
• Voltage, Output, Low: 0.8 V
• Voltage, Supply: 24 V
• For Use With: 497-4743 - BOARD EVAL FOR L4973X SW REG
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: 497-1412-5

Evaluation board
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Table 5.
Table 6.
Table 7.
Reference
Reference
Reference
C11
C11
C13
C14
U1
R3
R4
R3
R4
L1
Component list (fsw = 150 kHz, V
Resistor divider for V
Resistor divider for V
68 μH I
Capacitor 150 μF 35 V
Capacitor 150 μF 35 V
Capacitor 100 nF 5 %
Resistor 2.7 kΩ 1%
Resistor 2.7 kΩ 1%
Resistor 1 kΩ 1%
RMS
Not mounted
Not mounted
Description
Description
Description
= 3.4 A I
SAT
OUT
OUT
= 6.7 A
= 12 V
= 3.3 V
EKY-350ELL151MHB5D
EKY-350ELL151MHB5D
OUT
DO5040H-683MLD
Part number
Part number
Part number
L4973V3.3
= 5 V) (continued)
STMicroelectronics
Nippon Chemi-con
Nippon Chemi-con
Manufacturer
Manufacturer
Manufacturer
Coilcraft
L4973