L4973D5.1 STMicroelectronics, L4973D5.1 Datasheet - Page 13

• 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
7
Typical characteristics
Figure 9.
Figure 11. Stand by drain current vs.
Ibias
(mA)
Ibias
(μA)
5.0
4.5
4.0
3.5
3.0
2.5
2.0
150
100
50
0
0
V
Tamb=25˚C
0% DC
inh
10
10
Quiescent drain current vs.
input voltage (0% duty cycle)
input voltage
= 5V
20
20
30
30
200KHz-R2=22K
25˚C
125˚C
40
40
C7=1.2nF
100KHz-R2=20K
0Hz
50 V
50 V
D97IN635A
D97IN633A
C7=2.7nF
CC
CC
(V)
(V)
Figure 10. Quiescent drain current vs.
Figure 12. Reference voltage vs.
V
5.15
5.05
(mA)
Ibias
(V)
5.1
5.0
4.0
3.5
3.0
2.5
REF
-50
-40
-20
0% DC
V
junction temperature
junction temperature (pin 16)
CC
= 35V
0
0
Vcc=35V
20
Typical characteristics
40
50
0Hz
200KHz-R2=22K
100KHz-R2=20K
60
Pin 16
C7=1.2nF
100
80
C7=2.7nF
100
D97IN637
D97IN634
Tj(˚C)
Tj(˚C)
13/28