LM79M15CP [TI]

15V FIXED NEGATIVE REGULATOR, PSFM3;


型号：	LM79M15CP
厂家：	TEXAS INSTRUMENTS
描述：	15V FIXED NEGATIVE REGULATOR, PSFM3 三端稳压器调节器输出元件局域网
文件：	总13页 (文件大小：1254K)
中文：	中文翻译
下载：	下载PDF数据表文档文件

LM79M05, LM79M12, LM79M15

www.ti.com

SNOS553D –MAY 1998–REVISED APRIL 2013

LM79MXX Series 3-Terminal Negative Regulators

Check for Samples: LM79M05, LM79M12, LM79M15

FEATURES

DESCRIPTION

The LM79MXX series of 3-terminal regulators is

•

Thermal, Short Circuit and Safe Area

Protection

available with fixed output voltages of −5V, −12V, and

−15V. These devices need only one external

component—a compensation capacitor at the output.

The LM79MXX series is packaged in the TO-220

power package, and is capable of supplying 0.5A of

output current.

•

High Ripple Rejection

0.5A Output Current

4% Tolerance on Preset Output Voltage

These regulators employ internal current limiting, safe

area protection, and thermal shutdown for protection

against virtually all overload conditions.

Low ground pin current of the LM79MXX series

allows output voltage to be easily boosted above the

preset value with a resistor divider. The low quiescent

current of these devices with a specified maximum

change with line and load ensures good regulation in

the voltage boosted mode.

For output voltage other than −5V, −12V, and −15V

the LM137 series provides an output voltage range

from −1.2V to −57V.

Connection Diagram

Figure 1. TO-220 Plastic Package (NDE)

Front View

See Package Number NDE0003B

Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of

Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.

All trademarks are the property of their respective owners.

PRODUCTION DATA information is current as of publication date.

Products conform to specifications per the terms of the Texas

Instruments standard warranty. Production processing does not

necessarily include testing of all parameters.

LM79M05, LM79M12, LM79M15

SNOS553D –MAY 1998–REVISED APRIL 2013

www.ti.com

These devices have limited built-in ESD protection. The leads should be shorted together or the device placed in conductive foam

during storage or handling to prevent electrostatic damage to the MOS gates.

Absolute Maximum Ratings⁽¹⁾⁽²⁾

Input Voltage

V_O= −5V

−25V

V_O= −12V, −15V

V_O= −5V

−35V

25V

Input/Output Differential

V_O= −12V, −15V

30V

(3)

Power Dissipation

Internally Limited

Operating Junction

Temperature Range

0°C to +125°C

Storage Temperature Range

−65°C to +150°C

Lead Temperature

(Soldering, 10 sec.)

230°C

TBD

ESD Susceptibility

(1) Absolute Maximum Ratings indicate limits beyond which damage to the device may occur. Operating Ratings indicate conditions for

which the device is intended to be functional, but do not guarantee specific performance limits. For guaranteed specifications and test

conditions, see the Electrical Characteristics.

(2) If Military/Aerospace specified devices are required, please contact the Texas Instruments Sales Office/Distributors for availability and

specifications.

(3) Refer to Typical Performance Characteristics and Design Considerations for details.

Electrical Characteristics LM79M05C

Conditions unless otherwise noted: I_OUT= 350mA, C_IN= 2.2μF, C_OUT= 1μF, 0°C ≤ T_J≤ +125°C

Part Number

LM79M05C

−5V

Output Voltage

Units

Input Voltage (Unless Otherwise Specified)

−10V

Symbol

Parameter

Output Voltage

Conditions

Min

−4.8

Typ

Max

−5.2

V_O

T_J= 25°C

−5.0

5mA ≤ I_OUT≤ 350mA

−4.75

−5.25

(−25 ≤ V_IN≤ −7)

(1)

ΔV_O

Line Regulation

T_J= 25°C

(−25 ≤ V_IN≤ −7)

(−18 ≤ V_IN≤ − 8)

(1)

ΔV_O

Load Regulation

T_J= 25°C,

100

5mA ≤ I_OUT≤ 0.5A

T_J= 25°C

I_Q

Quiescent Current

Change

ΔI_Q

With Input Voltage

0.4

(−25 ≤ V_IN≤ −8)

With Load,

5mA ≤ I_OUT≤ 350mA

T_A= 25°C,

0.4

V_n

Output Noise Voltage

Ripple Rejection

150

μV

10Hz ≤ f ≤ 100Hz

f = 120Hz

(−18 ≤ V_IN≤ −8)

1.1

Dropout Voltage

T_J= 25°C, I_OUT= 0.5A

T_J= 25°C

I_OMAX

Peak Output Current

Average Temperature

Coefficient of Output Voltage

800

I_OUT= 5mA,

0°C ≤ T_J≤ 100°C

−0.4

mV/°C

(1) Regulation is measured at a constant junction temperature by pulse testing with a low duty cycle. Changes in output voltage due to

heating effects must be taken into account.

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LM79M05, LM79M12, LM79M15

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SNOS553D –MAY 1998–REVISED APRIL 2013

Electrical Characteristics LM79M12C, LM79M15C

Conditions unless otherwise noted: I_OUT= 350mA, C_IN= 2.2μF, C_OUT= 1 μF, 0°C ≤ T_J≤ +125°C

Part Number

LM79M12C

−12V

LM79M15C

−15V

Output Voltage

Units

Input Voltage (Unless Otherwise Specified)

−19V

−23V

Symbo

Parameter

Conditions

Min

Typ

Max

Min

Typ

Max

V_O

Output Voltage

T_J= 25°C

−11.5

−11.4

−12.0

−12.5

−12.6

−14.4

−15.0

−15.6

5 mA ≤ I_OUT≤ 350mA

−14.25

−15.75

(−27 ≤ V_IN≤ −14.5)

(−30 ≤ V_IN≤ −10.5)

(1)

ΔV_O

Line Regulation

Load Regulation

T_J= 25°C

(−30 ≤ V_IN≤ −14.5)

(−30 ≤ V_IN≤−17.5)

(−25 ≤ V_IN≤ − 15)

(−28 ≤ V_IN≤ −18)

(1)

ΔV_O

T_J= 25°C,

240

5mA ≤ I_OUT≤ 0.5A

T_J= 25°C

I_Q

Quiescent Current

Change

1.5

ΔI_Q

With Input Voltage

0.4

(−30 ≤ V_IN≤ −14.5)

(−30 ≤ V_IN≤ −27)

With Load,

5mA ≤ I_OUT≤ 350mA

T_A= 25°C,

0.4

V_n

Output Noise

Voltage

400

μV

10Hz ≤ f ≤ 100Hz

f = 120Hz

Ripple Rejection

(−25 ≤ V_IN≤ −15)

(−30 ≤ V_IN≤ −17.5)

Dropout Voltage

T_J= 25°C, I_OUT= 0.5A

T_J= 25°C

1.1

I_OMAX

Peak Output Current

Average Temperature

800

I_OUT= 5mA,

Coefficient of Output

Voltage

0°C ≤ T_J≤ 100°C

−0.8

−1.0

mV/°C

(1) Regulation is measured at a constant junction temperature by pulse testing with a low duty cycle. Changes in output voltage due to

heating effects must be taken into account.

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LM79M05, LM79M12, LM79M15

SNOS553D –MAY 1998–REVISED APRIL 2013

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Typical Performance Characteristics

Output Voltage

vs.

Temperature

Ripple Rejection

Figure 2.

Figure 3.

Minimum Input-Output

Differential

Output Impedance

Figure 4.

Figure 5.

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SNOS553D –MAY 1998–REVISED APRIL 2013

Typical Performance Characteristics (continued)

Quiescent Current

vs.

Input Voltage

Quiescent Current

vs.

Load Current

Figure 6.

Figure 7.

Maximum Average Power

Dissipation (TO-220)

Short-Circuit Current

Figure 8.

Figure 9.

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SNOS553D –MAY 1998–REVISED APRIL 2013

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Schematic Diagrams

Figure 10. −5V

Figure 11. −12V and −15V

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SNOS553D –MAY 1998–REVISED APRIL 2013

DESIGN CONSIDERATIONS

The LM79MXX fixed voltage regulator series have thermal-overload protection from excessive power, internal

short-circuit protection which limits the circuit's maximum current, and output transistor safe-area compensation

for reducing the output current as the voltage across the pass transistor is increased.

Although the internal power dissipation is limited, the junction temperature must be kept below the maximum

specified temperature in order to meet data sheet specifications. To calculate the maximum junction temperature

or heat sink required, the following thermal resistance values should be used:

Package

θ_JC

(°C/W)

θ_JA

(°C/W)

TO-220

(1)

θ_CA= θ_CS+θ_SA

Solving for T_J:

T_J

= T_A+ P_D(θ_JC+θ_CA) or

= T_A=+ P_Dθ_JA(Without a Heat Sink)

Where

T_J

= Junction Temperature

T_A

= Ambient Temperature

P_D

= Power Dissipation

θ_JC

= Junction-to-Case Thermal Resistance

θ_CA= Case-to-Ambient Thermal Resistance

θ_CS= Case-to-Heat Sink Thermal Resistance

θ_SA= Heat Sink-to-Ambient Thermal Resistance

θ_JA

= Junction-to-Ambient Thermal Resistance

Typical Applications

Bypass capacitors are necessary for stable operation of the LM79MXX series of regulators over the input voltage

and output current ranges. Output bypass capacitors will improve the transient response of the regulator.

The bypass capacitors (2.2μF on the input, 1.0μF on the output), should be ceramic or solid tantalum which have

good high frequency characteristics. If aluminum electrolytics are used, their values should be 10μF or larger.

The bypass capacitors should be mounted with the shortest leads, and if possible, directly across the regulator

terminals.

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SNOS553D –MAY 1998–REVISED APRIL 2013

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*Required if regulator is separated from filter capacitor by more than 3″. For value given, capacitor must be solid

tantalum. 25μF aluminum electrolytic may be substituted.

†Required for stability. For value given, capacitor must be solid tantalum. 25μF aluminum electrolytic may be

substituted. Values given may be increased without limit.

For output capacitance in excess of 100μF, a high current diode from input to output (1N4001, etc.) will protect the

regulator from momentary input shorts.

Figure 12. Fixed Regulator

*Improves transient response and ripple rejection.

Do not increase beyond 50μF.

Select R2 as follows:

LM79M05C

LM79M12C

LM79M15C

300Ω

750Ω

Figure 13. Variable Output

*Resistor tolerance of R4 and R5 determine matching of (+) and (−) outputs.

**Necessary only if raw supply filter capacitors are more than 3″ from regulators.

Figure 14. ±15V, 1 Amp Tracking Regulators

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SNOS553D –MAY 1998–REVISED APRIL 2013

Performance (Typical)

(−15)

(+15)

2 mV

Load Regulation at 0.5A

40mV

100 μVrms

50mV

Output Ripple, C_IN= 3000μF, I_L= 0.5A

Temperature Stability

100 μVrms

50mV

Output Noise 10Hz ≤ f ≤ 10kHz

150 μVrms

Figure 15. Dual Trimmed Supply

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SNOS553D –MAY 1998–REVISED APRIL 2013

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REVISION HISTORY

Changes from Revision C (April 2013) to Revision D

Page

•

Changed layout of National Data Sheet to TI format ............................................................................................................ 9

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PACKAGE OPTION ADDENDUM

www.ti.com

11-Apr-2013

PACKAGING INFORMATION

Orderable Device

LM79M12CT

Status Package Type Package Pins Package

Eco Plan Lead/Ball Finish

MSL Peak Temp

Op Temp (°C)

0 to 125

Top-Side Markings

Samples

Drawing

Qty

(1)

(2)

(3)

(4)

ACTIVE

TO-220

NDE

TBD

Call TI

CU SN

Call TI

LM79M

12CT

LM79M12CT/NOPB

ACTIVE

NDE

Green (RoHS

& no Sb/Br)

Level-1-NA-UNLIM

0 to 125

LM79M

12CT

⁽¹⁾The marketing status values are defined as follows:

ACTIVE: Product device recommended for new designs.

LIFEBUY: TI has announced that the device will be discontinued, and a lifetime-buy period is in effect.

NRND: Not recommended for new designs. Device is in production to support existing customers, but TI does not recommend using this part in a new design.

PREVIEW: Device has been announced but is not in production. Samples may or may not be available.

OBSOLETE: TI has discontinued the production of the device.

⁽²⁾Eco Plan - The planned eco-friendly classification: Pb-Free (RoHS), Pb-Free (RoHS Exempt), or Green (RoHS & no Sb/Br) - please check http://www.ti.com/productcontent for the latest availability

information and additional product content details.

TBD: The Pb-Free/Green conversion plan has not been defined.

Pb-Free (RoHS): TI's terms "Lead-Free" or "Pb-Free" mean semiconductor products that are compatible with the current RoHS requirements for all 6 substances, including the requirement that

lead not exceed 0.1% by weight in homogeneous materials. Where designed to be soldered at high temperatures, TI Pb-Free products are suitable for use in specified lead-free processes.

Pb-Free (RoHS Exempt): This component has a RoHS exemption for either 1) lead-based flip-chip solder bumps used between the die and package, or 2) lead-based die adhesive used between

the die and leadframe. The component is otherwise considered Pb-Free (RoHS compatible) as defined above.

Green (RoHS & no Sb/Br): TI defines "Green" to mean Pb-Free (RoHS compatible), and free of Bromine (Br) and Antimony (Sb) based flame retardants (Br or Sb do not exceed 0.1% by weight

in homogeneous material)

⁽³⁾MSL, Peak Temp. -- The Moisture Sensitivity Level rating according to the JEDEC industry standard classifications, and peak solder temperature.

(4)

Multiple Top-Side Markings will be inside parentheses. Only one Top-Side Marking contained in parentheses and separated by a "~" will appear on a device. If a line is indented then it is a

continuation of the previous line and the two combined represent the entire Top-Side Marking for that device.

Important Information and Disclaimer:The information provided on this page represents TI's knowledge and belief as of the date that it is provided. TI bases its knowledge and belief on information

provided by third parties, and makes no representation or warranty as to the accuracy of such information. Efforts are underway to better integrate information from third parties. TI has taken and

continues to take reasonable steps to provide representative and accurate information but may not have conducted destructive testing or chemical analysis on incoming materials and chemicals.

TI and TI suppliers consider certain information to be proprietary, and thus CAS numbers and other limited information may not be available for release.

In no event shall TI's liability arising out of such information exceed the total purchase price of the TI part(s) at issue in this document sold by TI to Customer on an annual basis.

Addendum-Page 1

MECHANICAL DATA

NDE0003B

www.ti.com

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LM79M15CP [TI]

相关型号：

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LM79M15CT/NOPB

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