LHC7913-4
3 AMP NEGATIVE LOW DROP VOLTAGE REGULATOR
DRAFT DATA
WITH INHIBIT
FEATURES:
x
Low output capacitance: 1
µF
x
Overtemperature protection
x
Overcurrent protection
x
Output short circuit monitoring, signalled by a
TTL-compatible output
x
ON/OFF external control by means of
TTL-compatible input.
x
Adjustable current limitation protects
outputs from damaging shortcircuits.
GENERAL DESCRIPTION:
The LHC7913-4 is a negative Voltage
Regulator family including both fixed and
adjustable versions. Housed into Power SO-20
slug-up package. It is specifically intended for
applications in rugged environments, such as
Nuclear Physics, in which it has to withstand
large amounts of radiation doses during its
operating life.
Input voltage ranges from -3 to -9 volts.
§
REMOTE SENSING OPERATION
15-Jul-03 - Rev. 1.1
Page 1 of 3
LHC7913- 4
ABSOLUTE MAXIMUM RATINGS (NOTE 1)
Symbol
Parameter
Vminus
Vplus
Vinh
Io
Value
-10
5
Vplus+ 0.3
Internally limited
Unit
V
V
V
A
DC input voltage
input voltage
INHIBIT input voltage
Output current
OPERATING CONDITIONS (NOTE 2)
Symbol
Parameter
Value
-9
Unit
V
Vminus
DC input voltage
Note 1.
Exceeding the absolute maximum rating may damage the device
Note 2.
The device is not guaranteed to function outside its operating rating.
THERMAL INFORMATIONS
R
thj-a
T
o
T
STG
Thermal Resistance Junction-Ambient
Power So-20 slug-up
Operating junction temperature range
Storage Temperature Range
2
-40 to 150
-40 to 150
ºC/W
ºC
ºC
PIN CONFIGURATION
Pin N°
SO-20 Pin Name
Pin Function
1
Vminus
Vminus
2
NC
NOT CONNECTED
3
NC
NOT CONNECTED
4
NC
NOT CONNECTED
5
SH-CNTRL SHORT CIRCUIT Control
6
OCM
OVER CURRENT MONITOR
7
V
Plus
Voltage input for Ocm &
Inhibit state
8
NC
NOT CONNECTED
9
GND
COMMON GROUND
10
Vminus
Vminus
11
Vminus
Vminus
12
INH
INHIBIT
13
ADJ
ADJ (Adjustable version)
14
NC
NOT CONNECTED
15
V
OUT
OUTPUT
16
V
OUT
OUTPUT
17
NC
NOT CONNECTED
18
NC
NOT CONNECTED
19
NC
NOT CONNECTED
20
Vminus
Vminus
15-Jul-03 - Rev. 1.1
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LHC7913 - 4
ELECTRICAL CHARACTERISTICS:
Unless otherwise specified , Vin = Vout - 2.5 V, Vout =-3V, Vplus=3V,Tj =25°C, Cin = 1
µ
F,
Cout = 1µF
µ
SYMBOL
V
IN
V
OUT
V
OUT
Ishort
∆Vo/V
i
∆Vo/VoI
Lo
Vplus
Quescent
current
PARAMETER
Operating input voltage
Output voltage accuracy
Operating output voltage
Output current limit
Line regulation
Load regulation
Quiescient current
Iq, Plus
Tj=-55° to 125° C
Vplus =3V
TEST CONDITIONS
Iout = 3A
Tj=-55° to 125° C
Iout = 5mA
Iout= 3A
Tj=-55° to 125° C
Tj=-55° to 125° C
Adjustable
Vi=Vout-2.5 to -12V
Iout = 5mA
MIN
-3
-2
-1.21
4.5
1
1
200
500
170
200
3
5
20
40
80
150
0.3
0.4
0.6
0.95
1.3
2
0.8
Vin=Vout -2.5 ±0.5 V I
OUT
= 15mA
f=120 Hz
f= 33 Khz
Vplus =3V
Iout=0 to 3A
Iout=0 to 3A
Vplus =3V I
OCM
= 10 mA (sinked current)
I
OCM
= -10uA (sourced current), Vi=Vout-2.5
Vplus = 3V
10Hz < freq < 100 Khz
2
0.6
Vplus
400
V
INH
= 3V
70
30
15
1
6
0.8
1.2
2
2.6
V
4
6
35
75
140
240
mA
µΑ
TYP
MAX
-9
2
-7
UNITS
V
%
V
A
%
%
Iout = 5mA to 3A
On mode
Output shorted to GND, Iocm = 0mA
On mode,
Output shorted to GND, Iocm =10mA
On mode
Iout=0
Off mode, Vinh=3V
Vi=Vout-2.5 to -12V, On mode Iout= 5 mA
Vi=Vout-2.5 to -12V, On mode Iout = 30 mA
Iq
(Vminus)
Quiescent Current,
Tj=-55° to 125° C
Vi=Vout-2.5 to -12V, On mode Iout = 300 mA
Vi=Vout-2.5 to -12V, On mode Iout = 1 A
Vi=Vout-2.5 to -12V, On mode Iout =2 A
Vi=Vout-2.5 to -12V, On mode Iout =3 A
OFF mode Vinh =3V Vplus =3V
Iout= 400 mA, Tj=-55° to 125° C
Vd
Dropout voltage
Iout= 1 A,
Iout= 2 A,
Iout =3 A,
Tj=-55° to 125° C
Tj=-55° to 125° C
Tj=-55° to 125° C
V
INH
V
INH
,Off
V
INH
,On
SVR
I
INH
Cout
ESR
V
OCML
V
OCMH
en/Vout
Inhibit voltage
turn,Off voltage
turn-On voltage
Supply voltage
rejection
Shutdown input current
Output capacitance
Electrical series
Resistance
Overcurrent monitor
voltage Low
Overcurrent monitor
voltage High
Output noise voltage
Vplus = 3V Tj=-55° to 125° C
V
dB
µΑ
µF
ohm
V
V
µVrms/V
15-Jul-03 - Rev. 1.1
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