ST78L12U Datasheet, PDF (1/2 Pages) SEMTECH ELECTRONICS LTD. – 3-Terminal Positive Voltage Regulator

ST 78L12U
3-Terminal Positive Voltage Regulator
Absolute Maximum Ratings (T_a = 25 ^OC)
Parameter
Symbol
Rating
Unit
Input Voltage
V_I
Power Dissipation
P_tot
Operating Temperature
T_opr
Storage Temperature Range
T_s
1) _{15 mm X 25 mm X 0.7 mm alumina ceramic board, Ta ≤ 25 OC}
35
V
800 ¹⁾
mW
- 20 to + 120
O_C
- 55 to +150
O_C
Electrical Characteristics (T_a = 25 ^OC)
(Unless otherwise specified, 0 ^OC ≤ T_J ≤ 125 ^OC, V_I = 19 V, I_O = 40 mA, C_I = 0.33 µF, C_O = 0.1 µF)
Parameter
Symbol
Test Condition
Min. Typ. Max. Unit
T_j = 25 ^OC
11.5 12 12.5 V
Output Voltage
V_O 14.5 V ≤ V_I ≤ 27 V, 1 mA ≤ I_O ≤ 40 mA _11.4
-
12.6 V
V_I = 19 V, 1 mA ≤ I_O ≤ 70 mA
11.4 - 12.6 V
Line Regulation
Regline ^{14.5 V ≤ VI ≤ 27 V, Tj = 25 OC}
16 V ≤ V_I ≤ 27 V, T_j = 25 ^OC
-
-
250
mV
-
-
200
Load Regulation
Regload ^{1 mA ≤ IO ≤ 100 mA, Tj = 25 OC}
1 mA ≤ I_O ≤ 40 mA, T_j = 25 ^OC
-
-
100
mV
-
-
50
Quiescent Current
I_Q T_j = 25 ^OC
-
-
6 mA
Quiescent Current Change
ΔI_Q
16 V ≤ V_I ≤ 27 V
1 mA ≤ I_O ≤ 40 mA
-
-
1.5
mA
-
-
0.1
Output Noise Voltage
V_N 10 Hz ≤ f ≤ 100 KHz, T_j = 25 ^OC
-
80
-
µV
Ripple Rejection
RR f = 120 Hz, 15 V ≤ V_I ≤ 25 V, T_j = 25 ^OC 37
-
-
dB
Dropout Voltage
V_Drop T_j = 25 °C
-
1.7
-
V
Vi
3
C1
0.33 µF
78L12U
2
1
Vo
C2
0.1 µF
SEMTECH ELECTRONICS LTD.
(Subsidiary of Sino-Tech International Holdings Limited, a company
listed on the Hong Kong Stock Exchange, Stock Code: 724)
®
Dated : 21/06/2006