Datasheet

3/13
L4971
Table 3. Absolute Maximum Ratings
Table 4. Thermal Data
(*) Package mounted on board.
3 ELECTRICAL CHARACTERISTCS
Symbol
Parameter Value Unit
Minidip S016
V
5
V
11
Input voltage 58 V
V4 V
5
,V
6
Output DC voltage -1 V
Output peak voltage at t = 0.1µs f=200KHz -5 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
(V
CC
= 20V) 6
-0.3
V
V
P
tot
Power dissipation a Tamb ≤60°C DIP8 1W
SO16 0.8 W
T
j
,T
stg
Junction and storage temperature -40 to 150 °C
Symbol Parameter DIP8 SO16 Unit
R
th(j-amb)
Thermal Resistance Junction to ambient Max. 90 (*) 110 (*) °C/W
Table 5. (T
j
= 25°C, Cosc = 2.7nF, Rosc = 20kΩ, V
CC
= 24V, unless otherwise specified.)
* Specification Refered to T
j
from 0 to 125°C
Symbol Parameter Test Condition Min. Typ. Max. Unit
DYNAMIC CHARACTERISTIC
V
I
Operating input voltage range Vo = 3.3 to 50V; Io = 1.5A * 8 55 V
Vo Output voltage Io = 0.5A 3.33 3.36 3.39 V
Io = 0.2 to 1.5A 3.292 3.36 3.427 V
Vcc = 8 to 55V * 3.22 3.36 3.5 V
Vd Dropout voltage Vcc = 10V; Io = 1.5A 0.44 0.55 V
*0.88V
I
l
Maximum limiting current
Efficiency
V
cc
= 8 to 55V * 2 2.5 3 A
Vo = 3.3V; Io = 1.5A 85 %
fs Switching frequency * 90 100 110 KHz
SVRR Supply voltage ripple rejection Vi = Vcc+2V
RMS
; Vo = Vref;
Io = 1.5A; f
ripple
= 100Hz
60 dB
Voltage stability of switching
frequency
Vcc = 8 to 55V 3 6 %
Temp. stability of switching
frequency
Tj = 0 to 125°C 4 %