L4971
THERMAL DATA
Symbol
R
th(j-amb)
Parameter
Thermal Resistance Junction to ambient
Max.
Minidip
90 (*)
SO16
110 (*)
Unit
°C/W
(*) Package mounted on board.
ABSOLUTE MAXIMUM RATINGS
Symbol
Minidip
V
5
V
4
I
4
V
6
-V
5
V
6
V
7
V
2
V
8
P
tot
T
j
,T
stg
S016
V
11
V
5
,V
6
I
5
,I
6
V12-V
11
V
12
V
13
V3
V
14
Bootstrap voltage
Analogs input voltage (V
CC
= 24V)
Analogs input voltage (VCC = 24V)
(V
CC
= 20V)
Power dissipation a T
amb
≤
60°C
Junction and storage temperature
Minidip
SO16
Input voltage
Output DC voltage
Output peak voltage at t = 0.1µs f=200KHz
Maximum output current
Parameter
Value
58
-1
-5
int. limit.
14
70
12
13
6
-0.3
1
0.8
-40 to 150
V
V
V
V
V
V
W
W
°C
Unit
V
V
V
ELECTRICAL CHARACTERISTICS
(Tj = 25°C, Cosc = 2.7nF, Rosc = 20kΩ, V
CC
= 24V, unless other-
wise specified.) * Specification Refered to Tj from 0 to 125°C
Symbol
Parameter
Test Condition
Min.
Typ.
Max.
Unit
DYNAMIC CHARACTERISTIC
V
I
V
o
Operating input voltage range
Output voltage
V
o
= 3.3 to 50V; I
o
= 1.5A
I
o
= 0.5A
I
o
= 0.2 to 1.5A
V
cc
= 8 to 55V
V
cc
= 10V; I
o
= 1.5A
V
cc
= 8 to 55V
V
o
= 3.3V; I
o
= 1.5A
V
i
= V
cc
+2V
RMS
; V
o
= V
ref
;
I
o
= 1.5A; f
ripple
= 100Hz
Vcc = 8 to 55V
T
j
= 0 to 125°C
*
8
3.33
3.292
3.22
3.36
3.36
3.36
0.44
2.5
85
100
55
3.39
3.427
3.5
0.55
0.88
3
110
V
V
V
V
V
V
A
%
KHz
dB
%
%
*
*
*
*
V
d
I
l
f
s
SVRR
Dropout voltage
Maximum limiting current
Efficiency
Switching frequency
Supply voltage ripple rejection
Voltage stability of switching
frequency
Temp. stability of switching
frequency
2
90
60
3
4
6
Soft Start
Soft start charge current
Soft start discharge current
30
6
40
10
50
14
µA
µA
V
µA
3/12
Inhibit
V
LL
I
sLL
Low level voltage
Isource Low level
*
*
5
0.9
15
STMICROELECTRONICS [ STMICROELECTRONICS ]
