Datasheet

3/13
L4978
(*) Pins 1, 7, 8, 9, 10, 15 and 16 are not internally, electrically connected to the die.
Table 4. Thermal Data
(*) Package mounted on board.
Table 5. Absolute Maximum Ratings
4 5, 6 OUT Stepdown regulator output
5 11 V
CC
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.
Symbol Parameter Minidip SO16 Unit
R
th(j-amb)
Thermal Resistance Junction to ambient Max. 90 (*) 110 (*) °C/W
Symbol
Parameter Value Unit
Minidip S016
V
5
V
11
Input voltage 58 V
V
4
V
5
,V
6
Output DC voltage
Output peak voltage at t = 0.1ms f=200KHz
-1
-5
V
V
I
4
I
5
,I
6
Maximum output current int. limit.
V
6
-V
5
V
12
-V
11
14 V
V
6
V
12
Bootstrap voltage 70 V
V
7
V
13
Analogs input voltage (V
CC
= 24V) 12 V
V
2
V
3
Analogs input voltage (V
CC
= 24V) 13
V
V
8
V
14
(VCC= 20V)
6
-0.3
V
V
P
tot
Power dissipation a Tamb 60°C
DIP-8
SO16
1
0.8
W
W
T
j
,T
stg
Junction and storage temperature -40 to 150 °C
Table 3. Pin Description (continued)
Pin Name Function