ST L4916 User Manual
L4916
L4916
VOLTAGE REGULATOR PLUS FILTER
.
.FIXED OUTPUT VOLTAGE 8.5 V
.250 mA OUTPUT CURRENT
.HIGH RIPPLE REJECTION
.HIGH LOAD REGULATION
.HIGH LINE REGULATION
.SHORT CIRCUIT PROTECTION
.THERMAL SHUT DOWN WITH HYSTERESIS DUMP PROTECTION
DESCRIPTION
Thiscircuit combinesboth a filter and a voltageregulator in order to provide a high ripple rejection over a wider input voltage range.
A supervisor low-pass loop of the element prevents the outputtransistor from saturationat lowinput voltages.
The non linear behaviour of this control circuitry allows a fast settling of the filter.
POW ER MI NIDIP
(4 + 4)
ORDERING NUMBER : L4916
BLOCK DIAGRAM
June 2000 |
1/8 |
L4916
PIN CONNECTION (top view)
ABSOLUTE MAXIMUM RATINGS
Symbol |
Parameter |
Value |
Unit |
Vi |
Peak Input Voltage (300 ms) |
40 |
V |
Vi |
DC Input Voltage |
28 |
V |
IO |
Output Current |
Internally Limited |
|
Ptot |
Power Dissipation |
Internally Limited |
|
Tstg, Tj |
Storage and Junction Temperature |
± 40 to 150 |
°C |
THERMAL DATA
Symbol |
Parameter |
|
Value |
Unit |
Rth j-amb |
Thermal Resistance Junction-ambient |
Max |
80 |
°C/W |
R |
Thermal Resistance Junction-pins |
Max |
20 |
° |
th j-pins |
|
|
|
C/W |
2/8
L4916
ELECTRICAL CHARACTERISTICS (Tamb =25 °C; Vi = 13.5 V, testcircuit of fig. 1, unlessotherwise specified)
Symbol |
Parameter |
|
Test Conditions |
Min. |
Typ. |
Max. |
Unit |
Vi |
Input Voltage |
|
|
|
|
20 |
V |
VO |
Output Voltage |
Vi |
= 12 to 18 V |
8.1 |
8.5 |
8.9 |
V |
|
|
IO |
= 5 to 150 mA |
|
|
|
|
VI/O |
Controlled Input-output Dropout |
Vi |
= 5 to 10 V |
|
1.6 |
2.1 |
V |
|
Voltage |
IO |
= 5 to 150 mA |
|
|
|
|
VO |
Line Regulation |
Vi |
= 12 to 18 V |
|
1 |
20 |
mV |
|
|
IO |
= 10 mA |
|
|
|
|
VO |
Load Regulation |
IO = 5 to 250 mA |
|
50 |
100 |
mV |
|
|
|
ton = 30 μs |
|
|
|
|
|
|
|
toff = ≥ 1 ms |
|
|
|
|
|
VO |
Load Regulation |
Vi |
= 8.5 V |
|
150 |
250 |
mV |
|
(filter mode) |
IO = 5 to 150 mA |
|
|
|
|
|
|
|
ton = 30 μs |
|
|
|
|
|
|
|
toff = ≥ 1 ms |
|
|
|
|
|
Iq |
Quiescent Current |
IO = 5 mA |
|
1 |
2 |
mA |
|
Iq |
Quiescent Current Change |
Vi |
= 6 to 18 V |
|
0.05 |
|
mA |
|
|
IO |
= 5 to 150 mA |
|
|
|
|
VO |
Output Voltage Drift |
I |
= 10 mA |
|
1.2 |
|
° |
|
O |
|
|
|
|
mV/ C |
|
T |
|
|
|
|
|
|
|
SVR |
Supply Voltage Rejection |
Viac = 1 Vrms |
|
|
|
|
|
|
|
f = 100 Hz |
|
|
|
|
|
|
|
IO = 150 mA |
|
|
|
|
|
|
|
VIDC = 12 to 18 V |
|
70 |
|
dB |
|
|
|
VIDC = 6 to 11 V |
|
35(*) |
|
dB |
|
ISC |
Short Circuit Current |
|
|
250 |
300 |
|
mA |
Ton |
Switch On Time |
IO |
= 150 mA |
|
|
|
|
|
|
Vi |
= 5 to 11 V |
|
500(*) |
|
ms |
|
|
Vi |
= 11 to 18 V |
|
300 |
|
ms |
TJ |
Thermal Shutdown Junction |
|
|
|
145 |
|
°C |
|
Temperature |
|
|
|
|
|
|
(*) Depending of the CFT capaci tor.
Figure 1 : Test and Application Circuit.
3/8
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