L4978 데이터 시트보기 (PDF) - STMicroelectronics
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L4978 Datasheet PDF : 13 Pages
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L4978
Table 3. Pin Description (continued)
N°
Pin
Name
Function
4
5, 6
OUT Stepdown regulator output
5
11
VCC Unregulated DC input voltage
6
12
BOOT A capacitor connected between this pin and OUT allows to drive the internal DMOS
Transistors
7
13
COMP E/A output to be used for frequency compensation
8
14
FB Stepdown feedback input. Connecting directly to this pin results in an output voltage
of 3.3V. An external resistive divider is required for higher output voltages.
(*) Pins 1, 7, 8, 9, 10, 15 and 16 are not internally, electrically connected to the die.
Table 4. Thermal Data
Symbol
Parameter
Rth(j-amb) Thermal Resistance Junction to ambient
(*) Package mounted on board.
Max.
Minidip
90 (*)
SO16
110 (*)
Unit
°C/W
Table 5. Absolute Maximum Ratings
Symbol
Minidip
V5
V4
S016
V11
V5,V6
Parameter
Input voltage
Output DC voltage
Output peak voltage at t = 0.1ms f=200KHz
I4
V6-V5
V6
V7
V2
V8
I5,I6 Maximum output current
V12-V11
V12
V13
Bootstrap voltage
Analogs input voltage (VCC= 24V)
V3 Analogs input voltage (VCC= 24V)
V14 (VCC= 20V)
Ptot
Power dissipation a Tamb ≤ 60°C
Tj,Tstg
Junction and storage temperature
DIP-8
SO16
Value
Unit
58
V
-1
V
-5
V
int. limit.
14
V
70
V
12
V
13
V
6
V
-0.3
V
1
W
0.8
W
-40 to 150
°C
3/13
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