L4973D3.3 STMicroelectronics, L4973D3.3 Datasheet - Page 8

• Manufacturer Part Number: L4973D3.3
• Description: IC BUCK SYNC 3.3/ADJ 3.5A SOIC20
• Manufacturer: STMicroelectronics
• Type: Step-Down (Buck)r

Specifications of L4973D3.3

• 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: 50 V
• Mounting Style: SMD/SMT
• For Use With: 497-4743 - BOARD EVAL FOR L4973X SW REG
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Electrical characteristics
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Table 4.
1. Pulse testing with a low duty cycle
2. Specifications referred to T
Sync function
Symbol
Maximum frequency
High input voltage
Low input voltage
Slave sink current
Master output amplitude I
Output pulse width
Electrical characteristics (continued)
(Refer to the test circuit,V
R
OSC
Parameter
= 20 kΩ; unless otherwise specified)
J
from -40 °C to 125 °C.
Duty cycle = 0%;
R
V
V
No load, V
source
CC
CC
OSC
= 8 V to 55 V
= 8 V to 55 V
=13 kΩ; C
= 3 mA
CC
Test condition
sync
= 24 V; T
= 4.5 V
OSC
= 820 pF;
J
= 25 °C, C
OSC
0.15
0.20
Min
3.5
4
= 2.7 nF;
0.25
0.35
Typ
4.5
Max
0.45
300
0.9
L4973
Unit
kHz
mA
μs
V
V
V