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National Semiconductor
National Semiconductor

LM2930 Datasheet

3-Terminal Positive Regulator


LM2930 Datasheet Preview


April 1998
LM2930
3-Terminal Positive Regulator
General Description
The LM2930 3-terminal positive regulator features an ability
to source 150 mA of output current with an input-output dif-
ferential of 0.6V or less. Efficient use of low input voltages
obtained, for example, from an automotive battery during
cold crank conditions, allows 5V circuitry to be properly pow-
ered with supply voltages as low as 5.6V. Familiar regulator
features such as current limit and thermal overload protec-
tion are also provided.
Designed originally for automotive applications, the LM2930
and all regulated circuitry are protected from reverse battery
installations or 2 battery jumps. During line transients, such
as a load dump (40V) when the input voltage to the regulator
can momentarily exceed the specified maximum operating
voltage, the regulator will automatically shut down to protect
both internal circuits and the load. The LM2930 cannot be
harmed by temporary mirror-image insertion.
Fixed outputs of 5V and 8V are available in the plastic
TO-220 and TO-263 power packages.
Features
n Input-output differential less than 0.6V
n Output current in excess of 150 mA
n Reverse battery protection
n 40V load dump protection
n Internal short circuit current limit
n Internal thermal overload protection
n Mirror-image insertion protection
n P+ Product Enhancement tested
Voltage Range
LM2930T-5.0:
LM2930T-8.0:
LM2930S-5.0:
LM2930S-8.0:
Connection Diagrams
(TO-220)
Plastic Package
(TO-263)
Plastic Surface-Mount Package
5V
8V
5V
8V
DS005539-1
Front View
Order Number LM2930T-5.0 or LM2930T-8.0
See NS Package Number T03B
Top View
DS005539-7
DS005539-8
Side View
Order Number LM2930S-5.0 or LM2930S-8.0
See NS Package Number TS3B
© 1998 National Semiconductor Corporation DS005539
www.national.com
Page 1

Absolute Maximum Ratings (Note 1)
If Military/Aerospace specified devices are required,
please contact the National Semiconductor Sales Office/
Distributors for availability and specifications.
Input Voltage
Operating Range
Overvoltage Protection
26V
40V
Reverse Voltage (100 ms)
Reverse Voltage (DC)
Internal Power Dissipation (Note 2)
Operating Temperature Range
Maximum Junction Temperature
Storage Temperature Range
Lead Temp. (Soldering, 10 seconds)
−12V
−6V
Internally Limited
−40˚C to +85˚C
125˚C
−65˚C to +150˚C
230˚C
Electrical Characteristics (Note 3)
LM2930-5.0 VIN=14V, IO=150 mA, Tj=25˚C (Note 6), C2=10 µF, unless otherwise specified
Tested
Parameter
Conditions
Typ Limit
(Note 4)
Output Voltage
5 5.3
4.7
Line Regulation
Load Regulation
Output Impedance
Quiescent Current
Output Noise Voltage
6VVIN26V, 5 mAIO150 mA
−40˚CTJ125˚C
9VVIN16V, IO=5 mA
6VVIN26V, IO=5 mA
5 mAIO150 mA
100 mADC & 10 mArms, 100 Hz−10 kHz
IO=10 mA
IO=150 mA
10 Hz−100 kHz
7
30
14
200
4
18
140
25
80
50
7
40
Long Term Stability
20
Ripple Rejection
Current Limit
fO=120 Hz
56
400 700
150
Dropout Voltage
Output Voltage Under
Transient Conditions
IO=150 mA
−12VVIN40V, RL=100
0.32
0.6
5.5
−0.3
Design
Limit
(Note 5)
5.5
4.5
Unit
VMAX
VMIN
VMAX
VMIN
mVMAX
mVMAX
mVMAX
m
mAMAX
mAMAX
µVrms
mV/1000 hr
dB
mAMAX
mAMIN
VMAX
VMAX
VMIN
Electrical Characteristics (Note 3)
LM2930-8.0 (VIN=14V, IO=150 mA, Tj=25˚C (Note 6), C2=10 µF, unless otherwise specified)
Tested
Parameter
Conditions
Typ Limit
(Note 4)
Output Voltage
8 8.5
7.5
Line Regulation
Load Regulation
Output Impedance
Quiescent Current
Output Noise Voltage
9.4VVIN26V, 5 mAIO150 mA,
−40˚CTJ125˚C
9.4VVIN16V, IO=5 mA
9.4VVIN26V, IO=5 mA
5 mAIO150 mA
100 mADC & 10 mArms, 100 Hz−10 kHz
IO=10 mA
IO=150 mA
10 Hz−100 kHz
12
50
25
300
4
18
170
50
100
50
7
40
Long Term Stability
30
Ripple Rejection
fO=120 Hz
52
Design
Limit
(Note 5)
8.8
7.2
Unit
VMAX
VMIN
VMAX
VMIN
mVMAX
mVMAX
mVMAX
m
mAMAX
mAMAX
µVrms
mV/1000 hr
dB
www.national.com
2
Page 2

Electrical Characteristics (Note 3) (Continued)
LM2930-8.0 (VIN=14V, IO=150 mA, Tj=25˚C (Note 6), C2=10 µF, unless otherwise specified)
Tested
Design
Parameter
Conditions
Typ Limit
Limit
Unit
(Note 4)
(Note 5)
Current Limit
Dropout Voltage
Output Voltage Under
Transient Conditions
IO=150 mA
−12VVIN40V, RL=100
400 700
150
0.32
0.6
8.8
−0.3
mAMAX
mAMIN
VMAX
VMAX
VMIN
Note 1: Absolute Maximum Ratings indicate limits beyond which damage to the device may occur. Operating ratings indicate conditions for which the device is func-
tional, but do not guarantee specific performance limits. Electrical Characteristics state DC and AC electrical specifications under particular test conditions which guar-
antee specific performance limits. This assumes that the device is within the Operating Ratings. Specifications are not guaranteed for parameters where no limit is
given, however, the typical value is a good indication of device performance.
Note 2: Thermal resistance without a heat sink for junction to case temperature is 3˚C/W and for case to ambient temperature is 50˚C/W for the TO-220, 73˚C/W
for the TO-263. If the TO-263 package is used, the thermal resistance can be reduced by increasing the P.C. board copper area thermally connected to the package.
Using 0.5 square inches of copper area, θJA is 50˚C/W; with 1 square inch of copper area, θJA is 37˚C/W; and with 1.6 or more square inches of copper area, θJA
is 32˚C/W.
Note 3: All characteristics are measured with a capacitor across the input of 0.1 µF and a capacitor across the output of 10 µF. All characteristics except noise voltage
and ripple rejection ratio are measured using pulse techniques (tW10 ms, duty cycle5%). Output voltage changes due to changes in internal temperature must be
taken into account separately.
Note 4: Guaranteed and 100% production tested.
Note 5: Guaranteed (but not 100% production tested) over the operating temperature and input current ranges. These limits are not used to calculate outgoing qual-
ity levels.
Note 6: To ensure constant junction temperature, low duty cycle pulse testing is used.
Typical Application
DS005539-5
*Required if regulator is located far from power supply filter.
**COUT must be at least 10 µF to maintain stability. May be increased without bound to maintain regulation during transients. Locate as close as possible to the
regulator. This capacitor must be rated over the same operating temperature range as the regulator. The equivalent series resistance (ESR) of this capacitor
should be less than 1over the expected operating temperature range.
Typical Performance Characteristics
Output Impedance
Overvoltage Supply Current
Reverse Supply Current
DS005539-11
DS005539-12
3
DS005539-13
www.national.com
Page 3
Part Number LM2930
Manufactur National Semiconductor
Description 3-Terminal Positive Regulator
Total Page 8 Pages
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