L4973D5.1 STMicroelectronics, L4973D5.1 Datasheet - Page 2

• 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
3
3.1
3.2
Electrical data
Maximum ratings
Table 2. Absolute maximum ratings
Thermal data
Table 3. Thermal data
1. Package mounted on board
DIP-18
V
V
V
I
V
V
V
V
V
9
7
2
2
V
Symbol
,V
,V
,I
-V
11
17
12
18
10
9
R
R
Symbol
3
T
8
3
8
thJP
thJA
J
P
,T
tot
STG
V
V
V
S0-20
I
10
V
V
V
V
V
V
9
2
2
,V
,V
,I
10
12
19
13
20
11
-V
3
3
8
Maximum thermal resistance junction-pin
Maximum thermal resistance junction-ambient
8
Input voltage
Output DC voltage
Output peak voltage at t = 0.1µs f = 200KHz
Maximum output current
Bootstrap voltage
Analogs input voltage (
Analogs input voltage (V
(V
(V
Inhibit
DIP 12+3+3
Power dissipation a Tpins ≤ 90°C
(T
(T
SO-20
Power dissipation a T
Junction and storage temperature
A
A
CC
CC
= 70°C no copper area)
= 70°C 4cm copper area on PCB)
= 20V)
= 20V)
Parameter
V
pins
CC
Parameter
CC
= 24V
= 90°C
= 24V)
)
DIP-18
60
12
(1)
-40 to 150
Value
-0.3
V
-0.3
5.5
0.3
1.3
- 5
14
70
12
13
58
SO-20
-1
6
5
2
4
CC
80
Electrical data
15
int. limit.
(1)
Unit
°C/W
°C/W
°C
W
W
W
W
Unit
V
V
V
V
V
V
V
V
V
V
V
V
V
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