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