L4973D5.1 STMicroelectronics, L4973D5.1 Datasheet - Page 5

• 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

Electrical characteristics
8/27
Table 4. Electrical characteristics (continued)
(Refer to the test circuit,V
unless otherwise specified)
1. Pulse testing with a low duty cycle
2. Specifications referred to T
Sync function
Symbol
Ramp peak
Maximum Duty Cycle
Maximum Frequency
High Input Voltage
Low Input Voltage
Slave Sink Current
Master Output
Amplitude
Output Pulse Width
Parameter
J
CC
from -40°C to 125°C.
= 24V; T
V
V
Duty Cycle = 0%;
R
V
V
I
no load, V
source
CC
CC
CC
CC
OSC
J
= 8V
= 55V
= 8V to 55V
= 8V to 55V
= 25°C, C
=13KΩ; C
= 3mA
Test condition
sync
= 4.5V
OSC
OSC
= 820pF;
= 2.7nF; R
OSC
0.15
0.20
Min
1.9
3.5
95
9
4
= 20KΩ;
0.25
0.35
Typ
2.1
9.6
4.5
97
Max
10.2
0.45
300
2.3
0.9
L4973
Unit
KHz
mA
µs
%
V
V
V
V
V