L4973D5.1 STMicroelectronics, L4973D5.1 Datasheet - Page 14

• 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

Typical characteristics
14/28
Figure 13. Reference voltage vs.
Figure 15. Inhibit current vs. inhibit
V
(μA)
100
5.15
5.05
Iinh
-50
50
(V)
5.1
5.0
REF
0
0
0
10
Vcc=35V
Pin 10
input voltage (pin 16)
voltage (pin 10)
Tj=25˚C
Pin 16
5
20
10
30
40
Tj=0˚C
Tj=125˚C
15
50 V
D97IN636A
D97IN651
Vinh(V)
CC
(V)
Figure 14. Reference voltage vs.
Figure 16. Line regulation (see
V
5.12
5.08
5.06
(V)
5.2
5.1
5.0
4.9
REF
(V)
5.1
V
O
0
0
10
10
reference input current
Vcc=10V
20
20
Tj=25˚C
30
30
Vcc=40V
Tj=125˚C
Tj=25˚C
40
40
I
O
= 1A
50 I
50
D97IN639A
D97IN638
Figure
REF
V
CC
(mA)
L4973
(V)
7)