L4973D3.3-013TR STMicroelectronics, L4973D3.3-013TR Datasheet - Page 6

• Manufacturer Part Number: L4973D3.3-013TR
• Description: IC REG SW STEP DOWN 3.5A 20-SOIC
• Manufacturer: STMicroelectronics
• Type: Step-Down (Buck)r

Specifications of L4973D3.3-013TR

• Internal Switch(s): Yes
• Synchronous Rectifier: No
• Number Of Outputs: 1
• Voltage - Output: 3.3V, 0.5 ~ 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 %
• For Use With: 497-4743 - BOARD EVAL FOR L4973X SW REG
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Other names: 497-3358-2

Electrical characteristics
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Electrical characteristics
Table 4.
Dynamic characteristics
Reference section
Symbol
Δf
η
sw
Input voltage range
Output voltage
L4973V5.1
Output voltage
L4973V3.3
R
Maximum limiting
current
Efficiency
Switching frequency
Supply voltage ripple
rejection
Switching frequency
stability vs., supply
voltage
Reference voltage
Line regulation
Load regulation
Short circuit current
DS(on )
Electrical characteristics
(Refer to the test circuit,V
R
OSC
Parameter
= 20 kΩ; unless otherwise specified)
(1)
V
I
I
to 55 V
I
I
to 40 V
V
V
V
V
V
I
V
I
V
I
V
V
V
O
O
O
O
O
ref
ref
O
CC
CC
O
O
i
CC
CC
CC
ref
CC
= 0.5 A to 3.5 A V
= 0.5 A to 3.5 A V
= V
= 1 A
= 1 A
= 1 A; f
= 0 to 20 mA;
= 0 mA;
= V
= 5.1 V; I
= 3.3 V; I
= 0 to 5 mA;
= 10.5 V I
= 8 V to 55 V
= 8 V to 55 V
= 8 to 55 V
= 8 to 55 V
= 0 to 20 mA
CC
REF
CC
+2 V
Test condition
ripple
to 40 V; I
= 24 V; T
O
O
RMS
O
= 3.5 A
= 3.5 A
= 100 Hz
= 3.5 A
V
O
O
CC
CC
= 3.5A
= V
J
= 8 V
= 8 V
= 25 °C, C
ref
;
(2)
(2)
(2)
(2)
(2)
(2)
(2)
3.326
3.292
5.025
4.950
OSC
5.05
5.00
4.95
3.26
Min
3.8
90
60
30
8
4
= 2.7 nF;
3.36 3.393
3.36 3.427
3.36
0.15
Typ
100
5.1
5.1
5.1
4.5
4.5
5.1
5.1
90
85
65
2
5
2
6
5.175
5.250
Max
5.15
5.20
5.25
3.46
0.22
0.35
110
100
5.5
5.5
55
10
10
25
5
L4973
Unit
kHz
mV
mV
mV
mA
dB
%
%
%
V
V
V
V
V
V
V
Ω
Ω
A
A
V
V