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XR-1568 Datasheet Preview

XR-1568 Datasheet

Dual-Polarity Tracking Voltage Regulator

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XR-1468/1S68
Dual·Polarity Tracking Voltage Regulator
GENERAL DESCRIPTION
The XR-1468/1568 is a dual polarity tracking voltage
regulator, internally trimmed for symmetrical positive
and negative 15V outputs. Current output capability is
100 mA, and may be increased by adding external pass
transistors. The device is intended for local "on-card"
regulation, which eliminates the distribution problems
associated with single point regulation.
The XR-1468CN and XR-1568N are guaranteed over
the O°C to 70°C commercial temperature range. The
XR-1568M is rated over the full military temperature
range of - 55°C to + 125°C.
FEATURES
Internally Set for ± 15V Outputs
± 100 mA Peak Output Current
Output Voltages Balanced Within 1% (XR-1568)
0.06% Line and Load Regulation
Low Stand-By Current
Output Externally Adjustable from ± 8 to ± 20 Volts
Externally Adjustable Current Limiting
Remote Sensing
APPLICATIONS
Main Regulation in Small Instruments
On-Card Regulation in Analog and Digital Systems
Point-of-Load Precision Regulation
FUNCTIONAL BLOCK DIAGRAM
GND
BALANCE
ADJUST
COMP.
SENSE.
vO·
N.C.
vce
N.C.
VEE
ORDERING INFORMATION
Part Number Temperature Output Offset Package
XR-1568M -55°C to + 125°C ± 150 mV max Ceramic
XR-1568N O°C to + 70°C ± 150 mV max Ceramic
XR-1468CN O°C to + 70°C ±300 mV maxCeramlc
ABSOLUTE MAXIMUM RATINGS
Power Supply
±30 Volts
Minimum Short-Circuit Resistance
4.0 Ohms
Load Current, Peak
± 100 mA
Power Dissipation
Ceramic (N) Package
Derate Above +25°C
1.0 Watt
6.7 mW/oC
Operating Temperature
XR-1568M
- 55°C to + 125°C
XR-1568/XR-1468C
Storage Temperature
O°C to +70°C
- 65°C to + 150°C
SYSTEM DESCRIPTION
The XR-1468/1568 is a dual polarity tracking voltage
regulator combining two separate regulators with a
common reference element in a single monolithic cir-
cuit, thus providing a very close balance between the
positive and negative output voltages. Outputs are In-
ternally set to ± 15 Volts but can be externally adjusted
between ± 8.0 to ± 20 Volts with a single control. The
circuit features ± 100 mA output current, with exter-
nally adjustable current limiting, and provision for re-
mote voltage sensing.
5·130




EXAR

XR-1568 Datasheet Preview

XR-1568 Datasheet

Dual-Polarity Tracking Voltage Regulator

No Preview Available !

XR·1468/1568
ELECTRICAL CHARACTERISTICS
Test conditions: (VCC = + 20V, VEE : - 20V, C1 = C2 = 1500 pF, C3 = C4 = 1,0 /LF, RSC + = RSC - = 4.00. IL +
= IL - = 0, TC = + 25°C unless otherwise noted.)
XR-1468C
XR-1568
PARAMETERS
MIN TYP MAX MIN TYP MAX UNITS
Output Voltage
Input Voltage
Input-Output Voltage Differential
Output Voltage Balance
14.5 15
15.5
14.8
15
15.2
--
30 -
-
30
-2.0 - 2.0 - -
- ±50 ±300 -
±50
±150
Vdc
Vdc
Vdc
mV
Line Regulation Voltage
(Vin = 18V to 30V)
(TLt to TH)tt
Load Regulation Voltage
(IL = 0 to 50 mA, TJ = constant)
(TA = TL to TH)
Output Voltage Range
Ripple Rejection (f = 120 Hz)
Output Voltage Temperature Stability
(TL to TH)
Short-Circuit Limit
(RSC = 10 ohms)
--
--
8.0
-
-
-
-
-
-
-
-
75
0.3
60
10 -
20 -
-
-
10 - -
30 - -
20 8.0 -
- - 75
1.0 -
0.3
- - 60
10
20
10
30
20
-
1.0
-
mV
mV
Vdc
dB
%
mA
Output Noise Voltage
(BW = 10 Hz - 10 kHz)
- 100 -
/LV(rms)
- 100 -
Positive Standby Current
(Vin = +30V)
Negative Standby Current
(Vin = -30V)
Long-Term Stability
=tTL O°C for XA-1468C/1568
= - 55°C for XR·1568M
- -2.4 4.0
2.4 4.0
- 1.0 3.0 - 1.0 3.0
- 0.2 -
- 0.2 -
ttTH = + 70°C for XR·1468C/1568 TJ = Junction Temp.
+ 125°C for XR-1568M
TC = Case Temp.
mA
mA
%/kHr
INPUT 1010----0;-4 Vce
VUI-';o----oINPIJT I-I
oVa
011 V..
I.O.F
C3
C' rnc/ C2 t/Iould be ~1Id II cf4. 101M dwlct .. polllbit. A D.' /IF _Imlc ClplCitOf
mIY be requittd on tM Input Ii_II tile dna" located III Ippreci.bli dilt_1 from
"" rectlf. filt.. ClPlCitOfL
C3 rnc/ C4 mIY belnclUllll to Improwe !old trllllltnt rISPOMI end to rlduc. th. output
noIII volt.... At low ternl*ltur. 01*1110". It mey be nee....,., to bypesl C4 with.
0.' IIF _ernie disc ClpKltor.
Figure 1. Basic 50 mA Regulator
INI'UfI+1
.7
Vcc
ASC ~& Vo+
"n
Vo- '0
ASC-
INPU T I - I
4 SENSE
1+1
SENSE "
1-1
<O""'l~] '....,ooK
14 Vldl
2
lI'ldj
,ooK
OND
,-'
'5OOpF
'500 pF
.
+1'
C3 I.O~F
C41'~O~F
oVa
+IIIVd.
"":::
-Va
-'IIVd.
Figure 2. Voltage Adjust and Balance Adjust Circuit
5-131


Part Number XR-1568
Description Dual-Polarity Tracking Voltage Regulator
Maker EXAR
Total Page 2 Pages
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