LM109 [TI]

5-Volt Regulator;


型号：	LM109
厂家：	TEXAS INSTRUMENTS
描述：	5-Volt Regulator
文件：	总15页 (文件大小：696K)
中文：	中文翻译
下载：	下载PDF数据表文档文件

LM109QML

LM109QML 5-Volt Regulator

Literature Number: SNVS366

November 2005

LM109QML

5-Volt Regulator

General Description

does improve transient response somewhat. Input bypass-

ing is needed, however, if the regulator is located very far

from the filter capacitor of the power supply. Stability is also

achieved by methods that provide very good rejection of load

or line transients as are usually seen with TTL logic.

The LM109 series are complete 5V regulators fabricated on

a single silicon chip. They are designed for local regulation

on digital logic cards, eliminating the distribution problems

association with single-point regulation. The devices are

available in two standard transistor packages. In the solid-

kovar TO-5 header, it can deliver output currents in excess of

200 mA, if adequate heat sinking is provided. With the TO-3

power package, the available output current is greater than

1A.

Although designed primarily as a fixed-voltage regulator, the

output of the LM109 series can be set to voltages above 5V,

as shown. It is also possible to use the circuits as the control

element in precision regulators, taking advantage of the

good current-handling capability and the thermal overload

protection.

The regulators are essentially blowout proof. Current limiting

is included to limit the peak output current to a safe value. In

addition, thermal shutdown is provided to keep the IC from

overheating. If internal dissipation becomes too great, the

regulator will shut down to prevent excessive heating.

Features

n Specified to be compatible, worst case, with TTL and

DTL

n Output current in excess of 1A

n Internal thermal overload protection

n No external components required

Considerable effort was expended to make these devices

easy to use and to minimize the number of external compo-

nents. It is not necessary to bypass the output, although this

Ordering Information

NS Part Number

SMD Part Number

NS Package Number

Package Description

3LD TO-39 Metal Can

2LD TO-3 Metal Can

LM109H/883

H03A

K02C

LM109K/883

Connection Diagrams

Metal Can Packages

20149933

See NS Package Number H03A

20149934

See NS Package Number K02C

Bottom View

DS201499

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Schematic Diagram

20149901

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Absolute Maximum Ratings (Note 1)

Input Voltage

35V

Power Dissipation

Internally Limited

−55˚C ≤ T_A≤ +150˚C

−65˚C ≤ T_A≤ +150˚C

150˚C

Operating Ambient Temperature Range

Storage Temperature Range

Maximum Junction Temperature

Thermal Resistance

θ_JA

H-Pkg (Still Air)

190˚C/W

69˚C/W

39˚C/W

TBD

H-Pkg (500LF/Min Air flow)

K-Pkg (Still Air)

K-Pkg (500LF/Min Air flow)

θ_JC

H-Pkg

25˚C/W

3˚C/W

300˚C

4000V

K-Pkg

Lead Temperature (Soldering, 10 sec.)

ESD Tolerance (Note 6)

Quality Conformance Inspection

Mil-Std-883, Method 5005 - Group A

Subgroup

Description

Static tests at

Temp ˚C

Static tests at

125

-55

Static tests at

Dynamic tests at

125

-55

Functional tests at

Switching tests at

Settling time at

125

-55

125

-55

Settling time at

125

-55

Settling time at

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LM109H Electrical Characteristics

DC/AC Parameters

The following conditions apply to all the following parameters, unless otherwise specified.

AC / DC: I_L= 5mA

Sub-

groups

Symbol

V_Start

Parameter

Conditions

Notes

Min Max

Unit

Start Up Input Voltage

Quiescent Current

V_O≥ 4.706V, R_L= 25Ω

V_I= 7V

(Note 2)

9.0

-10

I_Q

1, 2, 3

V_I= 7.2V, I_L= 500mA

V_I= 25V

(Note 4)

-10

V_I= 25V, I_L= 500mA

V_I= 35V

-10

∆

Quiescent Current Change

7V ≤ V_I≤ 25 V

V_I= 7.2V,

-0.5

-0.8

0.5

0.8

1, 2, 3

(Note 4)

5mA ≤ I_L≤ 500mA

7V ≤ V_I≤ 25V

V_RLine

V_RLoad

Line Regulation

Load Regulation

-50

2, 3

-100 100

-50 50

-100 100

-50 50

V_I= 7.2V,

5mA ≤ I_L≤ 500mA

(Note 4)

2, 3

V_I= 10V,

5mA ≤ I_L≤ 500mA

-100 100

-150 150

2, 3

V_I= 25V,

20mA ≤ I_L≤ 500mA

V_I= 25V, t_PW≤ 10ms,

500mA ≥ I_L≥ 20mA,

V_I= 7V, P₁≤ 2W

V_I= 7.2V, I_L= 500mA,

P ≤ 2W

(Note 4)

-50

V_O

Output Voltage

4.6

5.4

1, 2, 3

V_I= 10V, I_L= 100mA,

P ≤ 2W

4.7

4.6

5.3

5.4

V_I= 25V, I_L= 20mA,

P ≤ 2W

V_I= 25V, I_L= 500mA,

P ≤ 2W, t_PW≤ 10mS

V_I= 25V, P ≤ 2W

V_I= 35V

(Note 4)

1, 2, 3

5.4

2.0

1, 2, 3

I_OS

Short Circuit Current

Ripple Rejection ƒ

ƒ ≤ 120Hz, e_I= 1V_RMS

I_L= 125mA

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LM109K Electrical Characteristics

DC/AC Parameters

The following conditions apply to all the following parameters, unless otherwise specified. AC / DC: I_L= 5mA (Note 6)

Sub-

groups

Symbol

V_Start

Parameter

Conditions

Notes

Min Max

Unit

Start Up Input Voltage

Quiescent Current

V_O≥ 4.706V, R_L= 5Ω

V_I= 7V

(Note 2)

9.0

-10

I_Q

1, 2, 3

V_I= 7.2V, I_L= 1.5A

V_I= 25V

(Note 3)

-10

V_I= 25V, I_L= 1.5A

t_PW≤ 10ms

-10

V_I= 35V

-10

∆

Quiescent Current Change

7V ≤ V_I≤ 25 V

V_I= 7.2V,

-0.5

-0.8

0.5

0.8

1, 2, 3

(Note 3)

5mA ≤ I_L≤ 1.5A

7V ≤ V_I≤ 25V

V_RLine

V_RLoad

Line Regulation

Load Regulation

-50

2, 3

-100 100

-200 200

-100 100

-200 200

V_I= 7.2V,

5mA ≤ I_L≤ 1.5A

(Note 3)

2, 3

V_I= 10V,

1.5A ≥ I_L≥ 5mA

2, 3

V_I= 25V, t_PW10ms,

-50

1A ≥ I_L≥ 20mA,

V_I= 7V, P₁≤ 20W

V_I= 7.2V, I_L= 1.5A,

P ≤ 20W

V_O

Output Voltage

4.6

5.4

1, 2, 3

(Note 3)

V_I= 10V, I_L= 500mA,

P ≤ 20W

4.7

4.6

5.3

5.4

V_I= 25V, I_L= 20mA,

P ≤ 20W

V_I= 25V, I_L= 1A,

P ≤ 20W, t_PW≤ 10mS

V_I= 25V, P ≤ 20W

V_I= 35V

1, 2, 3

5.4

2.8

1, 2, 3

I_OS

Short Circuit Current

Ripple Rejection

ƒ ≤ 120Hz, e_I= 1V_RMS

I_L= 500mA

DC Parameters

The following conditions apply to all the following parameters, unless otherwise specified. DC: I_L= 5mA(Note 6)

Sub-

groups

Symbol

Parameter

Conditions

Notes

Min Max

Unit

V_N

∆V_O/ ∆T

Output Noise Voltage

Long Term Stability

10Hz ≤ ƒ ≤ 100KHz

(Note 5)

200

µV

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. For guaranteed specifications and test conditions, see the Electrical Characteristics. The guaranteed

specifications apply only for the test conditions listed. Some performance characteristics may degrade when the device is not operated under the listed test

conditions.

Note 2: This test is performed by shifting the input voltage in 50mV increments until output reaches 4.706V.

Note 3: At −55˚C & 125˚C, I = 1A rather than 1.5A.

Note 4: At −55˚C & 125˚C, I = 200mA rather than 500mA.

Note 5: Guaranteed parameter, not tested.

Note 6: Human body model, 1.5kΩ in series with 100 F.

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Application Hints

1. Bypass the input of the LM109 to ground with ≥ 0.2 µF

ceramic or solid tantalum capacitor if main filter capaci-

tor is more than 4 inches away.

Crowbar Overvoltage Protection

Input Crowbar

2. Avoid insertion of regulator into “live” socket if input

voltage is greater than 10V. The output will rise to within

2V of the unregulated input if the ground pin does not

make contact, possibly damaging the load. The LM109

may also be damaged if a large output capacitor is

charged up, then discharged through the internal clamp

zener when the ground pin makes contact.

3. The output clamp zener is designed to absorb tran-

sients only. It will not clamp the output effectively if a

failure occurs in the internal power transistor structure.

Zener dynamic impedance is ≈ 4Ω. Continuous RMS

current into the zener should not exceed 0.5A.

20149908

Output Crowbar

4. Paralleling of LM109s for higher output current is not

recommended. Current sharing will be almost nonexist-

ent, leading to a current limit mode operation for devices

with the highest initial output voltage. The current limit

devices may also heat up to the thermal shutdown point

(≈ 175˚C). Long term reliability cannot be guaranteed

under these conditions.

5. Preventing latchoff for loads connected to negative

voltage:

If the output of the LM109 is pulled negative by a high

current supply so that the output pin is more than 0.5V

negative with respect to the ground pin, the LM109 can latch

off. This can be prevented by clamping the ground pin to the

output pin with a germanium or Schottky diode as shown. A

silicon diode (1N4001) at the output is also needed to keep

the positive output from being pulled too far negative. The

10Ω resistor will raise +V_OUTby ≈ 0.05V.

20149909

*Zener is internal to LM109.

**Q1 must be able to withstand 7A continuous current if fusing is not used

at regulator input. LM109 bond wires will fuse at currents above 7A.

†

Q2 is selected for surge capability. Consideration must be given to filter

capacitor size, transformer impedance, and fuse blowing time.

††

Trip point is ≈ 7.5V.

20149907

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Typical Performance Characteristics

Maximum Average

Power Dissipation (LM109K)

Output Impedance

20149916

20149918

Maximum Average

Power Dissipation (LM109H)

Ripple Rejection

20149919

20149921

Current Limit

Characteristics (Note 7)

Thermally Induced Output

Voltage Variation

20149923

20149922

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Typical Performance Characteristics (Continued)

Ripple Rejection

20149924

Note 7: Current limiting foldback characteristics are determined by input

output differential, not by output voltage.

Input-Output Differential (V)

Output Voltage (V)

20149926

20149925

Output Voltage (V)

Quiescent Current

20149927

20149928

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Typical Performance Characteristics (Continued)

Quiescent Current

Output Voltage Noise

20149930

20149929

Line Transient Response

Load Transient Response

20149931

20149932

Typical Applications

Adjustable Output Regulator

Fixed 5V Regulator

20149904

20149902

*Required if regulator is located more than 4" from power supply filter

capacitor.

†

Although no output capacitor is needed for stability, it does improve

transient response.

C2 should be used whenever long wires are used to connect to the load,

or when transient response is critical.

Note: Pin 3 electrically connected to case.

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Typical Applications (Continued)

High Stability Regulator*

20149905

*Regulation better than 0.01%, load, line and temperature, can be obtained.

†

‡

Determines zener current. May be adjusted to minimize thermal drift.

Solid tantalum.

Current Regulator

20149906

*Determines output current. If wirewound resistor is used, bypass with 0.1 µF.

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Revision History

Date

Revision

Section

Originator

Changes

Released

11/08/05

New release to corporate format

L. Lytle

2 MDS datasheets converted into one

datasheet in the corporate format. Deleted

note 5 & corrected V_RLoadof LM109K to ≥ .

MNLM109-K Rev 0AL & MNLM109-H Rev

0AL will be archived.

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Physical Dimensions inches (millimeters) unless otherwise noted

Metal Can Package (H)

NS Package Number H03A

Metal Can Package (K)

NS Package Number K02C

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Notes

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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