NSC LM325H Datasheet
LM325
Dual Voltage Regulator
LM325 Dual Voltage Regulator
June 1999
General Description
This dual polarity tracking regulator is designed to provide
balanced positive and negative output voltages at current up
to 100 mA, and is set for
±
30V can be used and there is provision for adjustable current limiting. The device is available in two package types to
accommodate various power requirements and temperature
ranges.
±
15V outputs. Input voltages up to
Schematic and Connection Diagrams
Features
±
n
15V tracking outputs
n Output current to 100 mA
n Output voltage balanced to within 2
n Line and load regulation of 0.06
n Internal thermal overload protection
n Standby current drain of 3 mA
n Externally adjustable current limit
n Internal current limit
%
Metal Can Package
Case connected to −V
Order Number LM325H
See NS Package Number H10C
%
DS007776-3
IN
Top View
DS007776-1
© 1999 National Semiconductor Corporation DS007776 www.national.com
Absolute Maximum Ratings (Note 1)
If Military/Aerospace specified devices are required,
please contact the NationalSemiconductorSales Office/
Distributors for availability and specifications.
Input Voltage
Forced V
Forced V
+
(Min) (Note 2) −0.5V
O
−
(Max) (Note 2) +0.5V
O
Power Dissipation (Note 3) P
±
30V
MAX
Output Short-Circuit Duration (Note 4) Continuous
Operating Conditions
Operating Free Temperature Range 0˚C to +70˚C
Storage Temperature Range −65˚C to +150˚C
Lead Temperature (Soldering, 10 sec.) 300˚C
Electrical Characteristics
Parameter Conditions Min Typ Max Units
Output Voltage T
Input-Output Differential 2.0 V
Line Regulation V
Line Regulation Over Temperature Range V
Load Regulation
+
V
O
−
V
O
Load Regulation Over Temperature Range
+
V
O
−
V
O
Output Voltage Balance T
Output Voltage Over Temperature Range P ≤ P
Temperature Stability of V
O
Short Circuit Current Limit T
Output Noise Voltage T
Positive Standby Current T
Negative Standby Current T
Long Term Stability 0.2
Thermal Resistance Junction to
Case (Note 5)
LM325H
Junction to Ambient
Junction to Ambient
Junction to Ambient
LM325N
Note 1: “Absolute Maximum Ratings” indicate limits beyond which damage to the device may occur. Operating ratings indicate conditions for which the device is
functional, but do not guarantee specific performance limits.
Note 2: That voltage to which the output may be forced without damage to the device.
Note 3: Unless otherwise specified these specifications apply for T
Package.
Note 4: If the junction temperature exceeds 150˚C, the output short circuit duration is 60 seconds.
Note 5: Without a heat sink, the thermal resistance junction to ambient of the H10 Package is about 155˚C/W. With a heat sink, the effective thermal resistance can
only approach the junction to case values specified, depending on the efficiency of the sink.
=
25˚C 14.5 15 15.5 V
j
=
18V to 30V, I
IN
=
25˚C
T
j
=
18V to 30V, I
IN
=
I
0mAto50mA,V
L
=
25˚C 3.0
T
j
=
I
0mAto50mA,V
L
=
25˚C
j
,0≤IO≤50 mA,
MAX
18V ≤ |V
| ≤ 30
IN
=
25˚C 260 mA
j
=
25˚C, BW=100 − 10 kHz 150 µVrms
j
=
25˚C 1.75 3.0 mA
j
=
25˚C 3.1 5.0 mA
j
=
20 mA,
L
=
20 mA, 20 20 mV
L
=
±
30V,
IN
=
±
30V
IN
2.0 10 mV
10
5.0
4.0
7.0
10
20
20
±
300 mV
14.27 15.73 V
±
0.3
20
(Still Air)
(400 Lf/min Air Flow)
(Still Air)
=
0˚C to +125˚C on LM325, V
j
=
=
±
20V,I
L
0 mA, I
IN
215
82
90 ˚C/W
MAX
=
100 mA, P
=
2.0W for the H10
MAX
mV
mV
mV
mV
%
˚C/W
˚C/W
˚C/W
%
/kHr
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Typical Performance Characteristics
Load Regulation
Regulator
Dropout Voltage for
Negative Regulator
DS007776-11
DS007776-14
Standby Current Drain
Peak Output
Current vs
Junction Temperature
DS007776-12
DS007776-15
Regulator Dropout Voltage
for Positive Regulator
DS007776-13
LM325 Maximum Average
Power Dissipation vs
Ambient Temperature
DS007776-17
Load Transient Response
for Positive Regulator
DS007776-20
Load Transient Response
for Negative Regulator
DS007776-21
Line Transient Response
for Positive Regulator
DS007776-22
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