LH0076CG ,200 mA, 0 to 27 V, negative precision programmable regulatorApplications
Metal Can Pa‘ckage Preclslon - 15V Reference Supply wlthoul Current Limit
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LH0076CG
200 mA, 0 to 27 V, negative precision programmable regulator
National '
Semiconductor
LH0076 Negative Precision Programmable Regulator
General Description
The LH0076 is a precision programmable regulator for neg-
ative voltages. Reguiated output voltages from 0 to -27V
may be obtained by using 1 external resistor. Also available
without any external components are several fixed regular.
ed voltages with accuracies to 0.1% (--3V, -5V, -6V,
-8V, -9V, -12V, --15V and -18V). The output current
1'tmit is adjustable from 0 to 200 mA using 2 external resis-
tors. These features provide an inventory of precision regu-
lated values in 1 package.
Features
I: Line regulation typically 0.005%lv
" Load regulation typically 0.02%
a Remote voltage sensing
a Ripple rejection-N dB
:1 Output Adjustable to 0V
II Adjustable precision current limit
I! Output current to 200 mA
Schematic Diagram
mm cc- - c - "PP, -i2 u
t b--------------. Vuug
I 'll lj, nu
t t 1 “LIMIT
I I tt I
q .1. cu ' u Sw 'uust
RI , T (:x‘muu u P
A w'-4 m
I ' 'uun' . tN "
I ' h ,
Lde.'- .04" ,
Connection Diagram Typical Applications
Metal Can Patckage Preclslon - 15V Reference Supply without Current Limit
I. FIEXIERIAL
IR‘OIMIII
IEWUI Ill)
Order Number
LH0076G
LH007GCG
Ttrr ma
Case is electricaliy isolated See NS Package H123
[I u!“
-Vmc -
'Raeommanded it device is far from filter capacitors
TL/H/5548-1
QLOOH1
LH0076
Absolute Maximum Ratings
If MllltaryfAerospatte spettlfltrd devices are required,
Operating Temperature Range
please contact the National Sttrttktonttutttttr Sales LH0076 - 55% to + 125°C
'lge,1l'1str1t'uto" for avallablllty and tspetrlfleatlontr, LH00760 -25''C to + 85°C
Input Voltage _ 32V Storctjag-e 2,',',1,''a1r,a,tr' - 65 C to + 150 C
Output Voltage -27V Leas 2'',l2'1't': d 300°C
Output Current 200 mA ( o enng, secon s)
Power Dissipation See Curve
Electrical Characteristics Conditions are for TMIN STA STMAX unless otherwise noted
Parameter Conditlons LH0078 LH0076C Units
Mln Typ Max Mln Typ Max
Line Regulation TA = 25"C 0.005 0.02 0.005 0.04 %/V
Load Regulation TA = 25°C,
1 mA< ILOAD<200 mA
Vour2 -5.OV 7.5 15 mV
VOUT s; - 5.0V 0.02 0.15 0.02 th3 %
Reference Current (IREF) TA == 25''C, VIN = --15V 0.998 1.000 1.002 0.995 1.000 1.005 mA
Reference Current Drift " = - 15V - 0.0065 - 0.0065 o/o/''C
(AIREF/ATemp.)
Minimum Load Current (IUM) (Note 1) 98 100 102 95 100 105 pA
Output Voltage Range 0 - 27 o - 27 V
Minimum Input Voltage - 10 - 10 V
Input-Output Differential TA = 25°C, 2.7 3.2 2.7 3.5 V
Voltage 1 mA < ILOAD < 200 mA
Quiescent Supply Current VIN = -15V 11 15 11 15 mA
Ripple Rejection VOUT= 5.0V, f= 120 Hz 70 70 dB
Output Voltage TA = 25'C, (Note 2) * 0.1 i 0.5 i 0.1 i 1.0 M,
Tolerance
Output Voltage Change with (Note 3) 0.003 0.003 %/''C
Temperature (AVOUT/ ATemp.)
Note 1: Minimum load current is established by km. the current to 02 (see schematic.) 'LIM draws directly from the output if the current limit feature is used.
Note 2: For VlN-15V and VOUT obtained by using R4, R5, RS. and R8 individually.
Note 3: Total change over ttptreified temperature range.
Note 4: Refer to RETS0076t3 for military spetrihWatltms on the LH0076.
Typical Performance Characteristics
' Maximum Power Dissipatlon
If, AIIIEIT tt
0 " " " m 125 150
YEWEIIATURE PC)
Output Voltage Change with
Temperature (Normalized)
tf, '" .3
z 'd ..
" n u 's
tt '5 J-?
' m g;
it tg I IN MA : =
t u: , E
it ll " ttt MA g g
-so -25 n " MI " m IN
TEMPERATURE CC)
Load Transient Response
(Voltage Mode)
u: ' Vm- -10V
' _ , vom- -sv -
t; a , E
s w 's -
" : t ti i
n. = ' a E
's " -t a
B - m a c
E ' fa,tr',.
'f, I 3
" a n a a In no tk
me bal
' Quiescent InputCurrent
' t 2r: ,3
td l us": 3
g 45': a
l -IO -N
"NUT VOLTAGE M
Reference Current Change wlth
Temperature (Normalized)
ttpg . -ug
REFERENCE
CURRENT
OUTPUT VOLTAGE CflANBE (’0
-50 45 D " $0 "
TEMPERAYIIRE CIO
tN 125
Current Limit
VII-VouT ‘V’
-5U -ts 0 " M "
T EWERATURE I"tll
IN Ite
Load Transient Response
(Current Mode)
Vm- -2IV
law '100 MA (MAX)
001"" VDU’ABE
DEVIM’IOI (IV)
TIME bd
Ripple Relentlon
v." . 45v
IOUT = "' mA
Vour' -w ie,
cm; =0.1 m g
L‘nzr " 7
in IN " th 1Mt IM IN!
FHEOUENCY (H1)
-5l! -25 I 25 " "
40 -th ll " " "
Temperature Stablllty
ttot I 43V
RtotTEttttaL
TOO 115
YEMPERAYORE ee)
Input-Output Differential
Voltage
'LIIAD = 2M Ill
'LoAu . ' ttth
IN 125
TEMRATUB! (T)
Line Translent Response
VIN I -tw
0 m 100 100 m MO
IIMEUI)
Output Impedance
tti-tw
VuUt' "tt
IL- mu
ID 100 It
FIEHHEIEY (Hzl
1a 1“ “A ‘M
TlyH/5548-3
9£OOH1
LH0076
Typical Applications (Continued)
Variable Voltage Reference with Current Limit
2-Amp Regulator wlth Current Limit
v.,.o_.l
TL/H/5548-4
'Recommended if device is far trom filter capacitors
Application Information
The LHOO76 does not require external capacitors for stable
operation. However, an input bypass is recommended if the
device is far from filter capacitors. A 0.1 p.F for input bypass-
ing should be adequate for most applications.
DESCRIPTION OF OPTIONS
External Voltage Programming
An external resistance can be connected between pin 10
and ground to obtain any voltage from 0 to -27V using the
following equation:
= VOUT desired
EXT -ImA
The reference current (IREF) has a typical temperature coef-
ficient of --60 ppm/°C. Choosing a resistive material with a
temperature coefficient of 60 ppm/°C will compensate the
negative tempco of the reference current. resulting in an
output voltage with minimal change over the operating tem-
perature range. Example of a good resistive material is ni-
chrome, which has a typical tempco of 80 pprn/''C. Ni-
chroma is the resistive material used in the LH0076, result-
ing in output voltage drift of 20 ppmf''C typically.
Application Information (Continued)
Because a current source is used as a reference, remote
voltage programming is possible.
Internal Voltage Programming
The LH0076 provides various precision output voltages sim.
ply by using 1 or more of the internal programming resistors.
These voltages may be obtained by using the connections
as shown in Table 1.
RTOTAL is the total resistance between pin 10 and ground
VOUT " ‘REF X (RTOTA0
'mmlu " IA
TL/H/5548-5
R4, mi, R6 and M are precision trimmed to 0.1%
FIGURE 1
Current Limit Programming
The maximum current output of the device may be limited
by adding 2 externai resistors as shown in Figure 2. The
resistor values are calculated using the following equation:
RLIMIT
RSENSE
where RSENSE == 1 to 10tt
This programming current limit feature can be extended to
make the LH0076 a programmable current sink. This can be
done by leaving pin 10 open and setting RLIMIT and RSENSE
as desired. (See Figure 3).
|OUT(MAX) == I + 1 l X 100HA
h0 Vow
s LI!"
TL/Ht5548-6
FIGURE 2. Current Limit Programming'
For application where the current limit is used, a minimum
load current of 100 FA is established at the output. This
arises from the fact that the constant current used in setting
maximum output current is 100 pA. and it comes directly
from the output of the LH0076. It the total current is less
than this minimum current, the output will drop.
As in the remote voltage adjustment application, remote
current sensing can be applied similarly. “SENSE should be
placed as close to the output of the LH0076 as possible, but
RLIMIT can be a resistor or potentiometer located remotely
from the device.
it 'le1
TL/H/5548-7
FIGURE 3. Precision Current Sink
TABLE 1. Connection Scheme for Internally Available Output Voltages
OUTPUT
VOLTAGE (V) PIN 1 PIN 2
PIN 7 PIN 10 PIN 11
QLOOH'I
This datasheet has been :
www.ic-phoenix.com
Datasheets for electronic components.
National Semiconductor was acquired by Texas Instruments.
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This file is the datasheet for the following electronic components:
LH0076CG - product/lhOO76cg?HQS=T|-nu|I-nuII-dscataIog-df-pf-null-wwe
LH0076G - product/Ih00769?HQS=T|-nu|l-null-dscatalog-df—pf—nuII-wwe
