L4973D5.1 STMicroelectronics, L4973D5.1 Datasheet - Page 4

• 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
Table 4. Electrical characteristics (continued)
(Refer to the test circuit,V
unless otherwise specified)
Soft start
Inhibit
DC characteristics
Error amplifier
Oscillator section
Symbol
Soft Start Charge
Current
Soft Start Discharge
Current
High Level Voltage
Low Level Voltage
I
I
Total Operating
Quiescent Current
Quiescent Current
Total stand-by quiescent
current
High Level Output
Voltage
Low Level Output
Voltage
Source Bias Current
Source Output Current
Sink Output Current
Supply Voltage Ripple
Rejection
DC Open Loop Gain
Transconductance
Ramp valley
source
source
High Level
Low Level
Parameter
CC
= 24V; T
V
V
Duty Cycle = 50%
Duty Cycle = 0
V
V
V
C
current
R
I
V
comp
INH
INH
CC
CC
COMP
comp
REF
L
= ∞
J
= 24V; V
= 55V; V
= 3V
= 0.8V
= -0.1 to 0.1mA;
= 25°C, C
= 4.7µF 1-5mA load
= 6V
= VFB
Test condition
INH
INH
OSC
= 5V
= 5V
= 2.7nF; R
(2)
(2)
(2)
(2)
OSC
Electrical characteristics
11.0
0.78
Min
200
200
3.0
30
15
10
10
60
50
1
= 20KΩ;
0.85
Typ
100
150
300
300
2.7
2.5
45
22
16
15
80
60
4
2
0.92
Max
0.65
200
300
600
0.8
60
30
50
50
6
4
3
Unit
mA
mA
mS
µA
µA
µA
µA
µA
µA
µA
µA
µA
dB
dB
V
V
V
V
V
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