Datasheet LM330T-5.0 Datasheet (NSC)

LM330
3-Terminal Positive Regulator

LM330 3-Terminal Positive Regulator

May 1998

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.

Schematic and Connection Diagrams

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

DS009306-1

(TO-220)

Plastic Package

DS009306-2

Front View

Order Number LM330T-5.0

See NS Package Number T03B

© 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

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

Line Transient Protection (1000 ms) 40V

Electrical Characteristics (Note 2)

Symbol Parameter Conditions Min Typ Max Units

V

o

Output Voltage T
Output Voltage 5
Over Temp 6

∆V

o

Line Regulation 9<V

Load Regulation 5
Long Term Stability 20 mV/1000 hrs

I

Q

Quiescent Current I

Line Transient V
Reverse Polarity V

∆I

Q

Quiescent Current 6<V
Change

V

IN

Overvoltage Shutdown 26 38
Voltage
Max Line Transient 60 V

Reverse Polarity −30
Input Voltage DC V
Output Noise Voltage 10 Hz–100 kHz 50 µV
Output Impedance I
Ripple Rejection 56 dB
Current Limit 150 400 700 mA
Dropout Voltage I
Thermal Resistance Junction to Case 4 ˚C/W

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
measured using pulse techniques (t
rately.

=

IN

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

W

=

25˚C 4.8 5 5.2

j

<

<

I

150 mA 4.75 5.25 V

o

<

<

V

26V; 0˚C ≤ Tj≤ 100˚C

IN

<

IN

<

<

6

V

IN

<

<

I

o

=

10 mA 3.5 7

o

=

I

50 mA 5 11

o

=

I

150 mA 18 40 mA

o

=

40V, R

IN

=

−6V, R

IN

<

IN

1s, V

≤ 5.5V 50

o

>

o

=

100 mADC + 10 mArms 200 mΩ

o

=

150 mA 0.32 0.6 V

o

=

16V, I
26V, I

5mA 7 25

o

=

5mA 30 60 mV

o

150 mA 14 50

=

100Ω,1s 14

L

=

100Ω −80

L

26V 10

− 0.3V, R

=

100Ω −12

L

Junction to Ambient 50

14V, I

=

o

150 mA, T

=

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

j

%

www.national.com 2

Typical Performance Characteristics

Dropout Voltage

High Voltage Behavior

Peak Output Current

DS009306-7

DS009306-10

Dropout Voltage

Line Transient Response

Quiescent Current

DS009306-8

DS009306-11

Low Voltage Behavior

DS009306-9

Load Transient Response

DS009306-12

Quiescent Current

Quiescent Current

DS009306-13

DS009306-16

Ripple Rejection

DS009306-14

DS009306-17

DS009306-15

Ripple Rejection

DS009306-18

www.national.com3

Typical Performance Characteristics (Continued)

Output Impedance

DS009306-19

Output at Reverse Supply

DS009306-22

Overvoltage Supply Current

Output at Overvoltage

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.

DS009306-20

DS009306-23

Reverse Supply Current

Output Voltage (Normalized
to 5V at T

=

25˚C)

j

DS009306-21

DS009306-24

*

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.

www.national.com 4

DS009306-5

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

,=6.0 mA.

Qmax

DS009306-6

Physical Dimensions inches (millimeters) unless otherwise noted

LM330 3-Terminal Positive Regulator

TO Plastic Package

Order Number LM330T-5.0

NS Package Number T03B

LIFE SUPPORT POLICY

NATIONAL’S PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL COMPONENTS IN LIFE SUPPORT
DEVICES OR SYSTEMS WITHOUT THE EXPRESS WRITTEN APPROVAL OF THE PRESIDENT AND GENERAL
COUNSEL OF NATIONAL SEMICONDUCTOR CORPORATION. As used herein:

1. Life support devices or systems are devices or
systems which, (a) are intended for surgical implant
into the body, or (b) support or sustain life, and
whose failure to perform when properly used in
accordance with instructions for use provided in the

2. A critical component is any component of a life
support device or system whose failure to perform
can be reasonably expected to cause the failure of
the life support device or system, or to affect its
safety or effectiveness.

labeling, can be reasonably expected to result in a
significant injury to the user.

National Semiconductor
Corporation

Americas
Tel: [phone]
Fax: [phone]
Email: [e-mail]

www.national.com

National Semiconductor
Europe

Fax: [phone]

Email: [e-mail]
Deutsch Tel: [phone]
English Tel: [phone]
Français Tel: [phone]
Italiano Tel: [phone]

National Semiconductor
Asia Pacific Customer
Response Group

Tel: [phone]
Fax: [phone]
Email: [e-mail]

National Semiconductor
Japan Ltd.

Tel: [phone]
Fax: [phone]

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.