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E-L4973D3.3 Datasheet(PDF) 5 Page - STMicroelectronics

Part No. E-L4973D3.3
Description  3.5A step down switching regulator
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Maker  STMICROELECTRONICS [STMicroelectronics]
Homepage  http://www.st.com
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L4973
Electrical data
5/27
3
Electrical data
3.1
Maximum ratings
3.2
Thermal data
Table 2. Absolute maximum ratings
Symbol
Parameter
Value
Unit
DIP-18
S0-20
V7,V8
V9,V8
Input voltage
58
V
V2,V3
V2,V3
Output DC voltage
Output peak voltage at t = 0.1
µs f = 200KHz
-1
- 5
V
V
I2,I3
I2,I3
Maximum output current
int. limit.
V9-V8
V10-V8
14
V
V9
V10
Bootstrap voltage
70
V
V11
V12
Analogs input voltage (
VCC = 24V)
12
V
V17
V19
Analogs input voltage (VCC = 24V)
13
V
V12
V13
(VCC = 20V)
6
-0.3
V
V
V18
V20
(VCC = 20V)
5.5
0.3
V
V
V10
V11
Inhibit
VCC
-0.3
V
V
Ptot
DIP 12+3+3
Power dissipation a Tpins
≤ 90°C
(TA = 70°C no copper area)
(TA = 70°C 4cm copper area on PCB)
5
1.3
2
W
W
W
SO-20
Power dissipation a Tpins = 90°C
4W
TJ,TSTG
Junction and storage temperature
-40 to 150
°C
Table 3. Thermal data
Symbol
Parameter
DIP-18
SO-20
Unit
RthJP
Maximum thermal resistance junction-pin
12
15
°C/W
RthJA
Maximum thermal resistance junction-ambient
60 (1)
1.
Package mounted on board
80 (1)
°C/W




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