LM340LAZ-15X [TI]

15 V FIXED POSITIVE REGULATOR, PBCY3;


型号：	LM340LAZ-15X
厂家：	TEXAS INSTRUMENTS
描述：	15 V FIXED POSITIVE REGULATOR, PBCY3 输出元件调节器
文件：	总9页 (文件大小：648K)
中文：	中文翻译
下载：	下载PDF数据表文档文件

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Texas Instruments.

Search http://www.ti.com/ for the latest technical

information and details on our current products and services.

July 2005

LM140L/LM340L Series

3-Terminal Positive Regulators

General Description

vided to limit internal power dissipation. If internal power

dissipation becomes too high for the heat sinking provided,

the thermal shut-down circuit takes over, preventing the IC

from overheating.

The LM140L series of three terminal positive regulators is

available with several fixed output voltages making them

useful in a wide range of applications. The LM140LA is an

improved version of the LM78LXX series with a tighter out-

put voltage tolerance (specified over the full military tem-

perature range), higher ripple rejection, better regulation and

lower quiescent current. The LM140LA regulators have 2%

V_OUTspecification, 0.04%/V line regulation, and 0.01%/mA

load regulation. When used as a zener diode/resistor com-

bination replacement, the LM140LA usually results in an

effective output impedance improvement of two orders of

magnitude, and lower quiescent current. These regulators

can provide local on card regulation, eliminating the distribu-

tion problems associated with single point regulation. The

voltages available allow the LM140LA to be used in logic

systems, instrumentation, Hi-Fi, and other solid state elec-

tronic equipment. Although designed primarily as fixed volt-

age regulators, these devices can be used with external

components to obtain adjustable voltages and currents.

For applications requiring other voltages, see LM117L Data

Sheet.

Features

n Line regulation of 0.04%/V

n Load regulation of 0.01%/mA

n Output voltage tolerances of 2% at T_j= 25˚C and 4%

over the temperature range (LM140LA) 3% over the

temperature range (LM340LA)

n Output current of 100 mA

n Internal thermal overload protection

n Output transistor safe area protection

n Internal short circuit current limit

n Available in metal TO-39 low profile package

(LM140LA/LM340LA) and plastic TO-92 (LM340LA)

The LM140LA/LM340LA are available in the low profile

metal three lead TO-39 (H) and the LM340LA are also

available in the plastic TO-92 (Z). With adequate heat sink-

ing the regulator can deliver 100 mA output current. Current

limiting is included to limit the peak output current to a safe

value. Safe area protection for the output transistor is pro-

Output Voltage Options

LM140LA-5.0

LM140LA-12

LM140LA-15

LM340LA-5.0

LM340LA-12

LM340LA-15

12V

15V

12V

15V

Connection Diagrams

TO-39 Metal Can Package (H)

00778202

Bottom View

Order Number LM140LAH-5.0, LM140LAH-5.0/883, LM140LAH-12,

LM140LAH-12/883, LM140LAH-15, LM140LAH-15/883, LM340LAH-5.0, LM340LAH-12 or LM340LAH-15

See NS Package Number H03A

DS007782

www.national.com

Connection Diagrams (Continued)

TO-92 Plastic Package (Z)

00778203

Bottom View

Order Number LM340LAZ-5.0, LM340LAZ-12 or LM340LAZ-15

See NS Package Number Z03A

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Absolute Maximum Ratings (Note 1)

Maximum Junction Temperature

Storage Temperature Range

Metal Can (H package)

Molded TO-92

+150˚C

If Military/Aerospace specified devices are required,

please contact the National Semiconductor Sales Office/

Distributors for availability and specifications.

−65˚C to +150˚C

−55˚C to +150˚C

(Note 5)

Lead Temperature (Soldering, 10 sec.)

Metal Can

Input Voltage

35V

+300˚C

+230˚C

Internal Power Dissipation (Note 2)

Operating Temperature Range

LM140LA

Internally Limited

Plastic TO-92

−55˚C to +125˚C

0˚C to +70˚C

LM340LA

Electrical Characteristics

Test conditions unless otherwise specified. T_A= −55˚C to +125˚C (LM140LA), T_A= 0˚C to +70˚C (LM340LA), I_O= 40 mA, C_IN

= 0.33 µF, C_O= 0.01 µF.

Output Voltage Option

5.0V

10V

12V

19V

15V

23V

Input Voltage (unless otherwise noted)

Units

Symbol

Parameter

Output Voltage

Over Temp.

(Note 4)

Conditions

Min Typ Max Min Typ Max Min Typ Max

V_O

T_j= 25˚C

4.9

4.8

5.1 11.75 12 12.25 14.7 15 15.3

LM140LA I_O= 1 − 100 mA

5.2 11.5

(14.5–27)

5.15 11.65 12.35 14.55

(7–20) (14.3–27)

12.5 14.4

15.6

(7.2–20)

4.85

(17.6–30)

LM340LA I_O= 1 − 100 mA or

I_O= 1 − 40 mA and

V_IN= ( )V

15.45

(17.5–30)

∆V_O

Line Regulation T_j= 25˚C I_O= 40 mA

18 30

(7–25)

18 30

(17.3–30)

V_IN= ( )V

I_O= 100 mA

V_IN= ( )V

(14.2–30)

(7.5–25)

(14.5–30)

(17.5–30)

Load

T_j= 25˚C I_O= 1 − 40 mA

I_O= 1 − 100 mA

Regulation

Long Term

Stability

20 40

35 100

1000 hrs

I_O

Quiescent

Current

T_j= 25˚C

4.5

4.2

0.1

0.5

4.5

4.2

0.1

0.5

3.1 4.5

4.2

T_j= 125˚C

∆I_Q

Quiescent

Current

T_j= 25˚C ∆Load I_O= 1 − 40 mA

∆Line

0.1

0.5

µV

Change

V_IN= ( )V

(7.5–25)

(14.3–30)

(17.5–30)

V_N

Output Noise

Voltage

T_j= 25˚C (Note 3)

f = 10 Hz–10 kHz

Ripple Rejection f = 120 Hz, V_IN= ( )V

55 62

(7.5–18)

(14.5–25)

(17.5–28.5)

Input Voltage

Required to

Maintain Line

Regulation

T_j= 25˚C, I_O= 40 mA

14.2

17.3

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: Thermal resistance of H-package is typically 26˚C/W θ , 250˚C/W θ still air, and 94˚C/W θ 400 lf/min of air. For the Z-package is 60˚C/W θ , 232˚C/W

still air, and 88˚C/W θ at 400 lf/min of air. The maximum junction temperature shall not exceed 125˚C on electrical parameters.

Note 3: It is recommended that a minimum load capacitor of 0.01 µF be used to limit the high frequency noise bandwidth.

Note 4: The temperature coefficient of V is typically within 0.01% V /˚C.

OUT

Note 5: A military RETS specification is available upon request. At the time of printing, the LM140LA-5.0, -12, and -15 RETS specifications complied with the Min

and Max limits in this table. The LM140LAH-5.0, LM140LAH-12, and LM140LAH-15 may also be procured as Standard Military Drawings.

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Typical Performance Characteristics

Maximum Average

Power Dissipation

(Metal Can Package)

Maximum Average Power

Dissipation

00778207

00778208

Maximum Average Power

Dissipation (Plastic Package)

Peak Output Current

00778210

00778209

Dropout Voltage

Output Impedance

00778211

00778212

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Typical Performance Characteristics (Continued)

Ripple Rejection

Quiescent Current

00778213

00778214

Quiescent Current

00778215

Typical Applications

Fixed Output Regulator

00778205

*Required if the regulator is located far from the power supply filter.

**See note 3 in the electrical characteristics table.

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Typical Applications (Continued)

Adjustable Output Regulator

00778206

= 5V + (5V/R1 + I ) R2

OUT

5V/R1 = 3 I load regulation (L,) [(R1 + R2)/R1] (L, of LM140LA-5.0)

Equivalent Circuit

00778201

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Physical Dimensions inches (millimeters) unless otherwise noted

TO-39 Metal Can Package (H)

Order Number LM140LAH-5.0, LM140LAH-5.0/883, LM140LAH-12, LM140LAH-12/883,

LM140LAH-15, LM140LAH-15/883, LM340LAH-5.0, LM340LAH-12 or LM340LAH-15

NS Package Number H03A

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Physical Dimensions inches (millimeters) unless otherwise noted (Continued)

TO-92 Plastic Package (Z)

Order Number LM340LAZ-5.0, LM340LAZ-12, or LM340LAZ-15

NS Package Number Z03A

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.

For the most current product information visit us at www.national.com.

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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 labeling, can be reasonably expected to result

in a significant injury to the user.

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.

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