E-L4971 Datasheet, PDF (3/13 Pages) STMicroelectronics – 1.5A STEP DOWN SWITCHING REGULATOR

L4971
Table 3. Absolute Maximum Ratings
Symbol
Minidip S016
V₅
V₁₁
V4
V₅,V₆
I₄
V₆-V₅
V₆
V₇
V₂
V₈
I₅,I₆
V₁₂-V₁₁
V₁₂
V₁₃
V₃
V₁₄
Parameter
Input voltage
Output DC voltage
Output peak voltage at t = 0.1µs f=200KHz
Maximum output current
Bootstrap voltage
Analogs input voltage (V_CC = 24V
Analogs input voltage (V_CC = 24V)
(V_CC = 20V)
P_tot
Power dissipation a Tamb ≤60°C
T_j,T_stg
Junction and storage temperature
Value
Unit
58
V
-1
V
-5
V
int. limit.
14
V
70
V
12
V
13
V
6
V
-0.3
V
DIP8
1
W
SO16
0.8
W
-40 to 150
°C
Table 4. Thermal Data
Symbol
Parameter
R_th(j-amb) Thermal Resistance Junction to ambient
(*) Package mounted on board.
Max.
DIP8
90 (*)
SO16
110 (*)
Unit
°C/W
3 ELECTRICAL CHARACTERISTCS
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
*
0.88
V
I_l
Maximum limiting current
V_cc = 8 to 55V
Efficiency
Vo = 3.3V; Io = 1.5A
*
2
2.5
3
A
85
%
fs
Switching frequency
*
90
100 110 KHz
SVRR Supply voltage ripple rejection Vi = Vcc+2V_RMS; Vo = Vref;
60
dB
Io = 1.5A; f _ripple = 100Hz
Voltage stability of switching Vcc = 8 to 55V
frequency
3
6
%
Temp. stability of switching
frequency
Tj = 0 to 125°C
4
%
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