SGS Thomson Microelectronics L4916 Datasheet
VOLTAGEREGULATOR PLUSFILTER
.FIXEDOUTPUTVOLTAGE8.5 V
.
250mAOUTPUTCURRENT
.HIGH RIPPLEREJECTION
.HIGH LOADREGULATION
.HIGH LINE REGULATION
.SHORT CIRCUIT PROTECTION
.
THERMAL SHUTDOWN WITHHYSTERESIS
.DUMP PROTECTION
DESCRIPTION
Thiscircuitcombinesbothafilterandavoltageregulatorin orderto providea highripplerejectionovera
widerinput voltagerange.
A supervisorlow-pass loopof theelement prevents
theoutputtransistorfromsaturationat lowinputvoltages.
The non linear behaviour of this control circuitry
allowsa fastsettlingofthefilter.
POWER MI NIDIP
(4 + 4)
ORDERING NUMBER :
L4916
L4916
BLOCK DIAGRAM
June 2000
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L4916
PI N CONNE CTI ON (top view)
ABSOLUTEMAXIMUMRATINGS
Symbol Parameter Value Unit
Peak Input Voltage (300 ms) 40 V
V
i
DC Input Voltage 28 V
V
i
Output Current Internally Limited
I
O
Power Dissipation Internally Limited
P
tot
T
stg,Tj
Storage and Junction Temperature – 40 to 150
°C
THERMAL DATA
Symbol Parameter Value
R
th j-amb
R
th j-pins
Thermal Resistance Junction-ambient
Thermal Resistance Junction-pins
Max
Max
80
20
Unit
C/W
°
°C/W
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L4916
(T
ELECTRICALCHARACTERISTICS
Symbol Parameter Test Conditions Min. Typ. Max. Unit
Input Voltage 20 V
V
i
Output Voltage Vi=12to18V
V
O
∆V
∆
∆
∆
∆
SVR Supply Voltage Rejection V
(* ) Dependi ng of t he CFTcapaci t or .
Controlled Input-output Dropout
I/O
Voltage
Line Regulation Vi=12to18V
V
O
Load Regulation IO= 5 to 250mA
V
O
Load Regulation
V
O
(filter mode)
Quiescent Current IO=5mA 1 2 mA
I
q
Quiescent Current Change Vi= 6 to 18 V
I
∆
q
Output Voltage Drift I
V
O
T
∆
Short Circuit Current 250 300 mA
I
SC
Switch On Time IO= 150 mA
T
on
Thermal Shutdown Junction
T
J
Temperature
=25°C;Vi=13.5V, testcircuitoffig.1, unlessotherwisespecified)
amb
8.1 8.5 8.9 V
= 5 to 150mA
I
O
Vi= 5 to 10 V
= 5 to 150mA
I
O
1.6 2.1 V
120mV
=10mA
I
O
50 100 mV
=30µs
t
on
=≥1ms
t
off
Vi= 8.5 V
= 5 to 150mA
I
O
=30µs
t
on
=≥1ms
t
off
150 250 mV
0.05 mA
I
= 5 to 150mA
O
= 10 mA 1.2
O
=1V
iac
rms
f = 100 Hz
= 150 mA
I
O
=12to18V
V
IDC
= 6 to 11 V
V
IDC
= 5 to 11 V
V
i
=11to18V
V
i
70
35(*)
500(*)
300
145 °
mV/°C
dB
dB
ms
ms
C
Figure1 :
Testand ApplicationCircuit.
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