Datasheet LM330-5.0MDC Datasheet (NSC)

LM330
3-Terminal Positive Regulator

General Description

The LM330 5V 3-terminal positive voltage regulator features
an ability to source 150 mA of output current with an
input-output differential of 0.6V or less. Familiar regulator
features such as current limit and thermal overload protec­tion are also provided.

The low dropout voltage makes the LM330 useful for certain
battery applications since thisfeatureallows a longer battery
discharge before the output falls out of regulation. For ex­ample, a battery supplying the regulator input voltage may
discharge to 5.6V and still properly regulate the system and
load voltage. Supporting this feature, the LM330 protects
both itself and regulated systems from negative voltage in­puts resulting from reverse installations of batteries.

Other protection features include line transient protection up
to 26V, when the output actually shuts down to avoid damag­ing internal and external circuits. Also, the LM330 regulator
cannot be harmed by a temporary mirror-image insertion.

Features

n Input-output differential less than 0.6V
n Output current of 150 mA
n Reverse battery protection
n Line transient protection
n Internal short circuit current limit
n Internal thermal overload protection
n Mirror-image insertion protection
n P

+

Product Enhancement tested

Schematic and Connection Diagrams

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(TO-220)

Plastic Package

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Front View

Order Number LM330T-5.0

See NS Package Number T03B

May 1998

LM330 3-Terminal Positive Regulator

© 1999 National Semiconductor Corporation DS009306 www.national.com

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 26V
Line Transient Protection (1000 ms) 40V

Internal Power Dissipation Internally Limited
Operating Temperature Range 0˚C to +70˚C
Maximum Junction Temperature +125˚C
Storage Temperature Range −65˚C to +150˚C
Lead Temperature

(Soldering, 10 sec.) +300˚C

Electrical Characteristics (Note 2)

Symbol Parameter Conditions Min Typ Max Units

V

o

Output Voltage T

j

=

25˚C 4.8 5 5.2

Output Voltage 5

<

I

o

<

150 mA 4.75 5.25 V

Over Temp 6

<

V

IN

<

26V; 0˚C ≤ Tj≤ 100˚C

∆V

o

Line Regulation 9<V

IN

<

16V, I

o

=

5mA 7 25

6

<

V

IN

<

26V, I

o

=

5mA 30 60 mV

Load Regulation 5

<

I

o

<

150 mA 14 50

Long Term Stability 20 mV/1000 hrs

I

Q

Quiescent Current I

o

=

10 mA 3.5 7

I

o

=

50 mA 5 11

I

o

=

150 mA 18 40 mA

Line Transient V

IN

=

40V, R

L

=

100Ω,1s 14

Reverse Polarity V

IN

=

−6V, R

L

=

100Ω −80

∆I

Q

Quiescent Current 6<V

IN

<

26V 10

%

Change

V

IN

Overvoltage Shutdown 26 38
Voltage
Max Line Transient 60 V

1s, V

o

≤ 5.5V 50
Reverse Polarity −30
Input Voltage DC V

o

>

− 0.3V, R

L

=

100Ω −12
Output Noise Voltage 10 Hz–100 kHz 50 µV
Output Impedance I

o

=

100 mADC + 10 mArms 200 mΩ
Ripple Rejection 56 dB
Current Limit 150 400 700 mA
Dropout Voltage I

o

=

150 mA 0.32 0.6 V
Thermal Resistance Junction to Case 4 ˚C/W

Junction to Ambient 50

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: Unless otherwise specified: V

IN

=

14V, I

o

=

150 mA, T

j

=

25˚C, C1=0.1 µF, C2=10 µF. All characteristics except noise voltage and ripple rejection are

measured using pulse techniques (t

W

≤ 10 ms, duty cycle ≤ 5%). Output voltage changes due to changes in internal temperature must be taken into account sepa-

rately.

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Typical Performance Characteristics

Dropout Voltage

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Dropout Voltage

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Low Voltage Behavior

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High Voltage Behavior

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Line Transient Response

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Load Transient Response

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Peak Output Current

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Quiescent Current

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Quiescent Current

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Quiescent Current

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Ripple Rejection

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Ripple Rejection

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Typical Performance Characteristics (Continued)

Typical Applications

The LM330 is designed specifically to operate at lower input
to output voltages. The device is designed utilizing a power
lateral PNP transistor which reduces dropout voltage from

2.0V to 0.3V when compared to IC regulators using NPN
pass transistors. Since the LM330 can operate at a much
lower input voltage, the device power dissipation is reduced,
heat sinking can be simpler and device reliability improved
through lower chip operating temperature. Also, a cost sav­ings can be utilized through use of lower power/voltage com­ponents. In applications utilizing battery power, the LM330
allows the battery voltage to drop to within 0.3V of output
voltage prior to the voltage regulator dropping out of regula­tion.

Output Impedance

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Overvoltage Supply Current

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Reverse Supply Current

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Output at Reverse Supply

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Output at Overvoltage

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Output Voltage (Normalized
to 5V at T

j

=

25˚C)

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*

Required if regulator is located far from power supply filter.

**

C2 may be either an Aluminum or Tantalum type capacitor but must be
rated to operate at −40˚C to guarantee regulator stability to that
temperature extreme. 10 µF is the minimum value required for stability and
may be increased without bound. Locate as close as possible to the
regulation.

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Note: Compared to IC regulator with 2.0V dropout voltage and
I

Qmax

,=6.0 mA.

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Physical Dimensions inches (millimeters) unless otherwise noted

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TO Plastic Package

Order Number LM330T-5.0

NS Package Number T03B

LM330 3-Terminal Positive Regulator

National does not assume any responsibility for use of any circuitry described, no circuit patent licenses are implied and National reserves the right at any time without notice to change said circuitry and specifications.