L4973D5.1 STMicroelectronics, L4973D5.1 Datasheet - Page 15

• 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

L4973
Figure 17. Load regulation (see
Figure 19. Load regulation (see
5.15
5.05
3.35
3.34
3.33
3.32
3.31
V
(V)
5.1
5.0
V
(V)
3.3
O
O
0
0
Figure
Figure
1
1
V
V
CC
CC
= 35V
= 35V
7)
4)
2
2
Tj=25˚C
Tj=125˚C
Tj=25˚C
3
3
Tj=125˚C
D97IN640
D97IN661
I
I
O
O
(A)
(A)
Figure 18. Line regulation (see
Figure 20. Switching frequency vs.
(KHz)
3.35
3.34
3.33
3.32
3.31
500
200
100
fsw
(V)
3.3
V
50
20
10
5
O
0
0
10
R2 and C7
20
20
40
Typical characteristics
30
(Figure
60
I
O
40
= 1A
Tj=125˚C
Tj=25˚C
Tamb=25˚C
80
50
D97IN660A
4)
D97IN630
Figure
V
R2(KΩ)
CC
(V)
15/28
8)