L4974A STMicroelectronics, L4974A Datasheet - Page 2

• Manufacturer Part Number: L4974A
• Description: IC REG SW 3.5A 5.1V-40V 20-DIP
• Manufacturer: STMicroelectronics
• Type: Step-Down (Buck)r

Specifications of L4974A

• Internal Switch(s): Yes
• Synchronous Rectifier: No
• Number Of Outputs: 1
• Voltage - Output: 5.1 ~ 40 V
• Current - Output: 3.5A
• Frequency - Switching: 100kHz
• Voltage - Input: 15 ~ 50 V
• Operating Temperature: 0°C ~ 125°C
• Mounting Type: Through Hole
• Package / Case: 20-DIP (0.300", 7.62mm)
• Power - Output: 1.3W
• Output Voltage: 40 V
• Output Current: 3.5 A
• Input Voltage: 15 V to 50 V
• Switching Frequency: 90 KHz to 110 KHz
• Operating Temperature Range: - 40 C to + 150 C
• Mounting Style: Through Hole
• Duty Cycle (max): 90 %
• No. Of Outputs: 1
• Power Dissipation Pd: 5W
• No. Of Pins: 20
• Filter Terminals: Through Hole
• Rohs Compliant: Yes
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: 497-6699-5; L4974A

ABSOLUTE MAXIMUM RATINGS
L4974A
PIN CONNECTION (top view)
THERMAL DATA
2/22
V
2
Symbol
, V
R
R
Symbol
T
V
th j-pins
th j-amb
J
7
V
V
V
P
4
, T
I
V
, V
V
I
I
I
I
20
, V
11
11
20
3
2
7
8
tot
3
I
stg
9
8
, V
10
Thermal Resistance Junction-Pins
Thermal Resistance Junction-ambient
Input Voltage
Input Operating Voltage
Output DC Voltage
Output Peak Voltage at t = 0.1 s f = 200khz
Maximum Output Current
Boostrap Voltage
Boostrap Operating Voltage
Input Voltage at Pins 4, 12
Reset Output Voltage
Reset Output Sink Current
Input Voltage at Pin 2, 7, 9, 10
Reset Delay Sink Current
Error Amplifier Output Sink Current
Soft Start Sink Current
Total Power Dissipation at T
Junction and Storage Temperature
Parameter
at T
Parameter
amb
PINS
= 70°C (No copper area on PCB)
90°C
max
max
Value
12
60
Internally Limited
-40 to 150
V
Value
11
1.3
55
50
65
12
50
50
30
30
-1
-5
7
1
5
+ 15
°C/W
°C/W
Unit
Unit
mA
mA
mA
°C
W
W
V
V
V
V
V
V
V
V
V
A