3 AMP NEGATIVE LOW DROP VOLTAGE REGULATOR
WITH INHIBIT
15-Jul-03 - Rev. 1.1
Page 1 of 3
LHC7913-4
DRAFT DATA
FEATURES:
x
Low output capacitance: 1
F
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.
REMOTE SENSING OPERATION
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.
LHC7913- 4
15-Jul-03 - Rev. 1.1
Page 2 of 3
ABSOLUTE MAXIMUM RATINGS (NOTE 1)
Symbol
Parameter
Value
Unit
Vminus
DC input voltage
-10
V
Vplus
input voltage
5
V
Vinh
INHIBIT input voltage
Vplus+ 0.3
V
Io
Output current
Internally limited
A
OPERATING CONDITIONS (NOTE 2)
Symbol
Parameter
Value
Unit
Vminus
DC input voltage
-9
V
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
Thermal Resistance Junction-Ambient
Power So-20 slug-up
2
C/W
T
o
Operating junction temperature range
-40 to 150
C
T
STG
Storage Temperature Range
-40 to 150
C
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
LHC7913 - 4
15-Jul-03 - Rev. 1.1
Page 3 of 3
ELECTRICAL CHARACTERISTICS:
Unless otherwise specified , Vin = Vout - 2.5 V, Vout =-3V, Vplus=3V,Tj =25C, Cin = 1
F,
Cout = 1
F
SYMBOL
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
UNITS
V
IN
Operating input voltage
Iout = 3A Tj=-55 to 125 C
-3
-9
V
V
OUT
Output voltage accuracy
Iout = 5mA Tj=-55 to 125 C
-2
2
%
V
OUT
Operating output voltage
Iout= 3A Tj=-55 to 125 C
-1.21
-7
V
Ishort
Output current limit
Adjustable
4.5
A
Vo/V
i
Line regulation
Vi=Vout-2.5 to -12V Iout = 5mA
1
%
Vo/VoI
Lo
Load regulation
Iout = 5mA to 3A
1
%
On mode
Output shorted to GND, Iocm = 0mA
200
On mode,
Output shorted to GND, Iocm =10mA
500
On mode Iout=0
170
Vplus
Quescent
current
Quiescient current
Iq, Plus
Tj=-55 to 125 C
Vplus =3V
Off mode, Vinh=3V
200
Vi=Vout-2.5 to -12V, On mode Iout= 5 mA
3
4
Vi=Vout-2.5 to -12V, On mode Iout = 30 mA
5
6
Vi=Vout-2.5 to -12V, On mode Iout = 300 mA
20
35
Vi=Vout-2.5 to -12V, On mode Iout = 1 A
40
75
Vi=Vout-2.5 to -12V, On mode Iout =2 A
80
140
Vi=Vout-2.5 to -12V, On mode Iout =3 A
150
240
Iq
(Vminus)
Quiescent Current,
Tj=-55 to 125 C
OFF mode Vinh =3V Vplus =3V
0.3
mA
Iout= 400 mA, Tj=-55 to 125 C
0.4
0.8
Iout= 1 A, Tj=-55 to 125 C
0.6
1.2
Iout= 2 A, Tj=-55 to 125 C
0.95
2
Vd
Dropout voltage
Iout =3 A, Tj=-55 to 125 C
1.3
2.6
V
V
INH
V
INH
,Off
V
INH
,On
Inhibit voltage
turn,Off voltage
turn-On voltage
Vplus = 3V Tj=-55 to 125 C
2
0.8
V
SVR
Supply voltage
rejection
Vin=Vout -2.5 0.5 V I
OUT
= 15mA
f=120 Hz
f= 33 Khz
70
30
dB
I
INH
Shutdown input current
Vplus =3V V
INH
= 3V
15
Cout
Output capacitance
Iout=0 to 3A
1
F
ESR
Electrical series
Resistance
Iout=0 to 3A
2
6
ohm
V
OCML
Overcurrent monitor
voltage Low
Vplus =3V I
OCM
= 10 mA (sinked current)
0.6
V
V
OCMH
Overcurrent monitor
voltage High
I
OCM
= -10uA (sourced current), Vi=Vout-2.5
Vplus = 3V
Vplus
V
en/Vout
Output noise voltage
10Hz < freq < 100 Khz
400
Vrms/V
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