LM1117T-1.8/NOPB [TI]

IC,VOLT REGULATOR,FIXED,+1.8V,BIPOLAR,SIP,3PIN,PLASTIC;


型号：	LM1117T-1.8/NOPB
厂家：	TEXAS INSTRUMENTS
描述：	IC,VOLT REGULATOR,FIXED,+1.8V,BIPOLAR,SIP,3PIN,PLASTIC
文件：	总22页 (文件大小：566K)
中文：	中文翻译
下载：	下载PDF数据表文档文件

National Semiconductor is now part of

Texas Instruments.

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

information and details on our current products and services.

June 2004

LM1117/LM1117I

800mA Low-Dropout Linear Regulator

General Description

Features

n Available in 1.8V, 2.5V, 2.85V, 3.3V, 5V, and Adjustable

Versions

The LM1117 is a series of low dropout voltage regulators

with a dropout of 1.2V at 800mA of load current. It has the

same pin-out as National Semiconductor’s industry standard

LM317.

n Space Saving SOT-223 and LLP Packages

n Current Limiting and Thermal Protection

The LM1117 is available in an adjustable version, which can

set the output voltage from 1.25V to 13.8V with only two

external resistors. In addition, it is also available in five fixed

voltages, 1.8V, 2.5V, 2.85V, 3.3V, and 5V.

n Output Current

n Line Regulation

n Load Regulation

n Temperature Range

— LM1117

800mA

0.2% (Max)

0.4% (Max)

The LM1117 offers current limiting and thermal shutdown. Its

circuit includes a zener trimmed bandgap reference to as-

sure output voltage accuracy to within 1%.

0˚C to 125˚C

−40˚C to 125˚C

— LM1117I

The LM1117 series is available in LLP, TO-263, SOT-223,

TO-220, and TO-252 D-PAK packages. A minimum of 10µF

tantalum capacitor is required at the output to improve the

transient response and stability.

Applications

n 2.85V Model for SCSI-2 Active Termination

n Post Regulator for Switching DC/DC Converter

n High Efficiency Linear Regulators

n Battery Charger

n Battery Powered Instrumentation

Typical Application

Active Terminator for SCSI-2 Bus

10091905

Fixed Output Regulator

10091928

DS100919

www.national.com

Ordering Information

Package

Temperature

Range

Part Number

Packaging Marking

Transport Media

NSC

Drawing

MP04A

3-lead

0˚C to +125˚C

LM1117MPX-ADJ

LM1117MPX-1.8

LM1117MPX-2.5

LM1117MPX-2.85

LM1117MPX-3.3

LM1117MPX-5.0

LM1117IMPX-ADJ

LM1117IMPX-3.3

LM1117IMPX-5.0

LM1117T-ADJ

N03A

N12A

Tape and Reel

Rails

SOT-223

N13A

N04A

N05A

N06A

−40˚C to +125˚C

0˚C to +125˚C

N03B

N05B

N06B

3-lead TO-220

3-lead TO-252

LM1117T-ADJ

LM1117T-1.8

LM1117T-2.5

LM1117T-2.85

LM1117T-3.3

LM1117T-5.0

LM1117DT-ADJ

LM1117DT-1.8

LM1117DT-2.5

LM1117DT-2.85

LM1117DT-3.3

LM1117DT-5.0

LM1117IDT-ADJ

LM1117IDT-3.3

LM1117IDT-5.0

1117ADJ

T03B

LM1117T-1.8

Rails

LM1117T-2.5

Rails

LM1117T-2.85

Rails

LM1117T-3.3

Rails

LM1117T-5.0

Rails

0˚C to +125˚C

LM1117DTX-ADJ

LM1117DTX-1.8

LM1117DTX-2.5

LM1117DTX-2.85

LM1117DTX-3.3

LM1117DTX-5.0

LM1117IDTX-ADJ

LM1117IDTX-3.3

LM1117IDTX-5.0

LM1117LDX-ADJ

LM1117LDX-1.8

LM1117LDX-2.5

LM1117LDX-2.85

LM1117LDX-3.3

LM1117LDX-5.0

LM1117ILDX-ADJ

LM1117ILDX-3.3

LM1117ILDX-5.0

LM1117SX-ADJ

LM1117SX-2.85

LM1117SX-3.3

LM1117SX-5.0

Tape and Reel

TD03B

−40˚C to +125˚C

0˚C to +125˚C

8-lead LLP

LDC08A

1117-18

1117-25

1117-28

1117-33

1117-50

−40˚C to 125˚C

0˚C to +125˚C

1117IAD

1117I33

1117I50

TO-263

LM1117SADJ

LM1117S2.85

LM1117S3.3

LM1117S5.0

TS3B

www.national.com

Block Diagram

10091901

Connection Diagrams

TO-263

SOT-223

10091944

Top View

10091904

Top View

TO-220

10091945

Side View

LLP

10091902

Top View

TO-252

10091946

When using the LLP package

Pins 2, 3 & 4 must be connected together and

Pins 5, 6 & 7 must be connected together

Top View

10091938

Top View

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.

TO-220 (T) Package

SOT-223 (IMP) Package

ESD Tolerance (Note 3)

260˚C, 10 sec

260˚C, 4 sec

2000V

Maximum Input Voltage (V_INto GND)

Power Dissipation (Note 2)

Junction Temperature (T_J)

(Note 2)

20V

Operating Ratings (Note 1)

Input Voltage (V_INto GND)

Internally Limited

15V

150˚C

Junction Temperature Range (T_J)(Note 2)

LM1117

LM1117I

0˚C to 125˚C

Storage Temperature Range

Lead Temperature

-65˚C to 150˚C

−40˚C to 125˚C

LM1117 Electrical Characteristics

Typicals and limits appearing in normal type apply for T_J= 25˚C. Limits appearing in Boldface type apply over the entire junc-

tion temperature range for operation, 0˚C to 125˚C.

Min

(Note 5)

Typ

(Note 4)

Max

(Note 5)

Symbol

Parameter

Conditions

Units

V_REF

Reference Voltage

LM1117-ADJ

I_OUT= 10mA, V_IN-V_OUT= 2V, T_J= 25˚C

10mA ≤ I_OUT≤ 800mA, 1.4V ≤ V_IN-V_OUT

≤ 10V

1.238

1.250

1.262

1.225

1.270

V_OUT

Output Voltage

LM1117-1.8

I_OUT= 10mA, V_IN= 3.8V, T_J= 25˚C

0 ≤ I_OUT≤ 800mA, 3.2V ≤ V_IN≤ 10V

LM1117-2.5

1.782

1.800

1.818

1.746

1.854

I_OUT= 10mA, V_IN= 4.5V, T_J= 25˚C

0 ≤ I_OUT≤ 800mA, 3.9V ≤ V_IN≤ 10V

LM1117-2.85

2.475

2.500

2.525

2.450

2.550

I_OUT= 10mA, V_IN= 4.85V, T_J= 25˚C

0 ≤ I_OUT≤ 800mA, 4.25V ≤ V_IN≤ 10V

0 ≤ I_OUT≤ 500mA, V_IN= 4.10V

LM1117-3.3

2.820

2.790

2.850

2.880

2.910

I_OUT= 10mA, V_IN= 5V T_J= 25˚C

0 ≤ I_OUT≤ 800mA, 4.75V≤ V_IN≤ 10V

LM1117-5.0

3.267

3.300

3.333

3.235

3.365

I_OUT= 10mA, V_IN= 7V, T_J= 25˚C

0 ≤ I_OUT≤ 800mA, 6.5V ≤ V_IN≤ 12V

LM1117-ADJ

4.950

5.000

5.050

4.900

5.100

∆V_OUT

Line Regulation

(Note 6)

I_OUT= 10mA, 1.5V ≤ V_IN-V_OUT≤ 13.75V

LM1117-1.8

0.035

0.2

I_OUT= 0mA, 3.2V ≤ V_IN≤ 10V

LM1117-2.5

I_OUT= 0mA, 3.9V ≤ V_IN≤ 10V

LM1117-2.85

I_OUT= 0mA, 4.25V ≤ V_IN≤ 10V

LM1117-3.3

I_OUT= 0mA, 4.75V ≤ V_IN≤ 15V

LM1117-5.0

I_OUT= 0mA, 6.5V ≤ V_IN≤ 15V

www.national.com

LM1117 Electrical Characteristics (Continued)

Typicals and limits appearing in normal type apply for T_J= 25˚C. Limits appearing in Boldface type apply over the entire junc-

tion temperature range for operation, 0˚C to 125˚C.

Min

(Note 5)

Typ

(Note 4)

Max

(Note 5)

Symbol

Parameter

Conditions

Units

∆V_OUT

Load Regulation

(Note 6)

LM1117-ADJ

V_IN-V_OUT= 3V, 10 ≤ I_OUT≤ 800mA

LM1117-1.8

0.2

0.4

V_IN= 3.2V, 0 ≤ I_OUT≤ 800mA

LM1117-2.5

V_IN= 3.9V, 0 ≤ I_OUT≤ 800mA

LM1117-2.85

V_IN= 4.25V, 0 ≤ I_OUT≤ 800mA

LM1117-3.3

V_IN= 4.75V, 0 ≤ I_OUT≤ 800mA

LM1117-5.0

V_IN= 6.5V, 0 ≤ I_OUT≤ 800mA

I_OUT= 100mA

_IN-V _OUTDropout Voltage

(Note 7)

1.10

1.15

1.20

1200

1.20

1.25

1.30

1500

I_OUT= 500mA

I_OUT= 800mA

I_LIMIT

Current Limit

V_IN-V_OUT= 5V, T_J= 25˚C

LM1117-ADJ

800

Minimum Load

Current (Note 8)

Quiescent Current

V_IN= 15V

1.7

LM1117-1.8

V_IN≤ 15V

LM1117-2.5

V_IN≤ 15V

LM1117-2.85

V_IN≤ 10V

LM1117-3.3

V_IN≤ 15V

LM1117-5.0

V_IN≤ 15V

%/W

Thermal Regulation

Ripple Regulation

T_A= 25˚C, 30ms Pulse

f_RIPPLE=1 20Hz, V_IN-V_OUT= 3V V_RIPPLE

= 1V_PP

0.01

0.1

Adjust Pin Current

Change

120

µA

10 ≤ I_OUT≤ 800mA,

1.4V ≤ V_IN-V_OUT≤ 10V

0.2

0.5

0.3

0.003

15.0

3.0

µA

Temperature Stability

Long Term Stability

RMS Output Noise

Thermal Resistance

Junction-to-Case

T_A= 125˚C, 1000Hrs

(% of V_OUT), 10Hz ≤ f ≤10kHz

3-Lead SOT-223

˚C/W

3-Lead TO-220

3-Lead TO-252

Thermal Resistance

Junction-to-Ambient

(No air flow)

3-Lead SOT-223 (No heat sink)

3-Lead TO-220 (No heat sink)

3-Lead TO-252 (Note 9) (No heat sink)

3-Lead TO-263

136

8-Lead LLP(Note 10)

www.national.com

LM1117I Electrical Characteristics

Typicals and limits appearing in normal type apply for T_J= 25˚C. Limits appearing in Boldface type apply over the entire junc-

tion temperature range for operation, −40˚C to 125˚C.

Min

(Note 5)

Typ

(Note 4)

Max

(Note 5)

Symbol

Parameter

Conditions

Units

V_REF

Reference Voltage

LM1117I-ADJ

I_OUT= 10mA, V_IN-V_OUT= 2V, T_J= 25˚C

10mA ≤ I_OUT≤ 800mA, 1.4V ≤ V_IN-V_OUT

≤ 10V

1.238

1.250

1.262

1.200

1.290

V_OUT

∆V_OUT

Output Voltage

LM1117I-3.3

I_OUT= 10mA, V_IN= 5V, T_J= 25˚C

0 ≤ I_OUT≤ 800mA, 4.75V ≤ V_IN≤ 10V

LM1117I-5.0

3.267

3.300

3.333

3.168

3.432

I_OUT= 10mA, V_IN= 7V, T_J= 25˚C

0 ≤ I_OUT≤ 800mA, 6.5V ≤ V_IN≤ 12V

LM1117I-ADJ

4.950

5.000

5.050

4.800

5.200

Line Regulation

(Note 6)

I_OUT= 10mA, 1.5V ≤ V_IN-V_OUT≤ 13.75V

LM1117I-3.3

0.035

0.3

I_OUT= 0mA, 4.75V ≤ V_IN≤ 15V

LM1117I-5.0

I_OUT= 0mA, 6.5V ≤ V_IN≤ 15V

LM1117I-ADJ

Load Regulation

(Note 6)

V_IN-V_OUT= 3V, 10 ≤ I_OUT≤ 800mA

LM1117I-3.3

0.2

0.5

V_IN= 4.75V, 0 ≤ I_OUT≤ 800mA

LM1117I-5.0

V_IN= 6.5V, 0 ≤ I_OUT≤ 800mA

I_OUT= 100mA

_IN-V _OUTDropout Voltage

1.10

1.15

1.20

1200

1.30

1.35

1.40

1500

(Note 7)

I_OUT= 500mA

I_OUT= 800mA

I_LIMIT

Current Limit

V_IN-V_OUT= 5V, T_J= 25˚C

LM1117I-ADJ

800

Minimum Load

Current (Note 8)

Quiescent Current

V_IN= 15V

1.7

LM1117I-3.3

V_IN≤ 15V

LM1117I-5.0

V_IN≤ 15V

%/W

Thermal Regulation

Ripple Regulation

T_A= 25˚C, 30ms Pulse

f_RIPPLE=1 20Hz, V_IN-V_OUT= 3V V_RIPPLE

= 1V_PP

0.01

0.1

Adjust Pin Current

Change

120

µA

10 ≤ I_OUT≤ 800mA,

1.4V ≤ V_IN-V_OUT≤ 10V

0.2

0.5

µA

Temperature Stability

Long Term Stability

RMS Output Noise

Thermal Resistance

Junction-to-Case

T_A= 125˚C, 1000Hrs

0.3

(% of V_OUT), 10Hz ≤ f ≤10kHz

3-Lead SOT-223

0.003

15.0

˚C/W

3-Lead TO-252

Thermal Resistance

Junction-to-Ambient

No air flow)

3-Lead SOT-223 (No heat sink)

3-Lead TO-252 (No heat sink)(Note 9)

8-Lead LLP(Note 10)

136

Note 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 specific performance is not guaranteed. For guaranteed specifications and the test conditions, see the Electrical Characteristics.

www.national.com

Note 2: The maximum power dissipation is a function of T

, θ , and T . The maximum allowable power dissipation at any ambient temperature is

JA A

J(max)

= (T

–T )/θ . All numbers apply for packages soldered directly into a PC board.

J(max) A JA

Note 3: For testing purposes, ESD was applied using human body model, 1.5kΩ in series with 100pF.

Note 4: Typical Values represent the most likely parametric norm.

Note 5: All limits are guaranteed by testing or statistical analysis.

Note 6: Load and line regulation are measured at constant junction room temperature.

Note 7: The dropout voltage is the input/output differential at which the circuit ceases to regulate against further reduction in input voltage. It is measured when the

output voltage has dropped 100mV from the nominal value obtained at V = V

+1.5V.

OUT

Note 8: The minimum output current required to maintain regulation.

Note 9: Minimum pad size of 0.038in

Note 10: Thermal Performance for the LLP was obtained using JESD51-7 board with six vias and an ambient temperature of 22˚C. For information about improved

thermal performance and power dissipation for the LLP, refer to Application Note AN-1187.

Typical Performance Characteristics

Dropout Voltage (V_IN-V

)

Short-Circuit Current

OUT

10091922

10091923

Load Regulation

LM1117-ADJ Ripple Rejection

10091943

10091906

www.national.com

Typical Performance Characteristics (Continued)

LM1117-ADJ Ripple Rejection vs. Current

Temperature Stability

10091925

10091907

Adjust Pin Current

LM1117-2.85 Load Transient Response

10091926

10091908

LM1117-5.0 Load Transient Response

LM1117-2.85 Line Transient Response

10091909

10091910

www.national.com

Typical Performance Characteristics (Continued)

LM1117-5.0 Line Transient Response

10091911

Application Note

1.0 External Capacitors/Stability

1.1 Input Bypass Capacitor

An input capacitor is recommended. A 10µF tantalum on the

input is a suitable input bypassing for almost all applications.

1.2 Adjust Terminal Bypass Capacitor

The adjust terminal can be bypassed to ground with a by-

pass capacitor (C_ADJ) to improve ripple rejection. This by-

pass capacitor prevents ripple from being amplified as the

output voltage is increased. At any ripple frequency, the

impedance of the C_ADJshould be less than R1 to prevent the

ripple from being amplified:

1/(2π*f_RIPPLE*C_ADJ

)

10091917

The R1 is the resistor between the output and the adjust pin.

Its value is normally in the range of 100-200Ω. For example,

FIGURE 1. Basic Adjustable Regulator

3.0 Load Regulation

with R1 = 124Ω and f_RIPPLE= 120Hz, the C_ADJshould be

11µF.

1.3 Output Capacitor

The LM1117 regulates the voltage that appears between its

output and ground pins, or between its output and adjust

pins. In some cases, line resistances can introduce errors to

the voltage across the load. To obtain the best load regula-

tion, a few precautions are needed.

The output capacitor is critical in maintaining regulator sta-

bility, and must meet the required conditions for both mini-

mum amount of capacitance and ESR (Equivalent Series

Resistance). The minimum output capacitance required by

the LM1117 is 10µF, if a tantalum capacitor is used. Any

increase of the output capacitance will merely improve the

loop stability and transient response. The ESR of the output

capacitor should range between 0.3Ω - 22Ω. In the case of

the adjustable regulator, when the C_ADJis used, a larger

output capacitance (22µf tantalum) is required.

Figure 2, shows a typical application using a fixed output

regulator. The Rt1 and Rt2 are the line resistances. It is

obvious that the V_LOADis less than the V_OUTby the sum of

the voltage drops along the line resistances. In this case, the

load regulation seen at the R_LOADwould be degraded from

the data sheet specification. To improve this, the load should

be tied directly to the output terminal on the positive side and

directly tied to the ground terminal on the negative side.

2.0 Output Voltage

The LM1117 adjustable version develops a 1.25V reference

voltage, V_REF, between the output and the adjust terminal.

As shown in Figure 1, this voltage is applied across resistor

R1 to generate a constant current I1. The current I_ADJfrom

the adjust terminal could introduce error to the output. But

since it is very small (60µA) compared with the I1 and very

constant with line and load changes, the error can be ig-

nored. The constant current I1 then flows through the output

set resistor R2 and sets the output voltage to the desired

level.

For fixed voltage devices, R1 and R2 are integrated inside

the devices.

www.national.com

With an extremely large output capacitor (≥1000 µF), and

with input instantaneously shorted to ground, the regulator

could be damaged.

Application Note (Continued)

In this case, an external diode is recommended between the

output and input pins to protect the regulator, as shown in

Figure 4.

10091918

FIGURE 2. Typical Application using Fixed Output

Regulator

When the adjustable regulator is used (Figure 3), the best

performance is obtained with the positive side of the resistor

R1 tied directly to the output terminal of the regulator rather

than near the load. This eliminates line drops from appearing

effectively in series with the reference and degrading regu-

lation. For example, a 5V regulator with 0.05Ω resistance

between the regulator and load will have a load regulation

due to line resistance of 0.05Ω x I_L. If R1 (=125Ω) is con-

nected near the load, the effective line resistance will be

0.05Ω (1+R2/R1) or in this case, it is 4 times worse. In

addition, the ground side of the resistor R2 can be returned

near the ground of the load to provide remote ground sens-

ing and improve load regulation.

10091915

FIGURE 4. Regulator with Protection Diode

5.0 Heatsink Requirements

When an integrated circuit operates with an appreciable

current, its junction temperature is elevated. It is important to

quantify its thermal limits in order to achieve acceptable

performance and reliability. This limit is determined by sum-

ming the individual parts consisting of a series of tempera-

ture rises from the semiconductor junction to the operating

environment. A one-dimensional steady-state model of con-

duction heat transfer is demonstrated in Figure 5. The heat

generated at the device junction flows through the die to the

die attach pad, through the lead frame to the surrounding

case material, to the printed circuit board, and eventually to

the ambient environment. Below is a list of variables that

may affect the thermal resistance and in turn the need for a

heatsink.

R^θJC (Component

Variables)

R^θCA (Application

Variables)

Leadframe Size & Material Mounting Pad Size,

Material, & Location

10091919

No. of Conduction Pins

Placement of Mounting

Pad

FIGURE 3. Best Load Regulation using Adjustable

Output Regulator

Die Size

PCB Size & Material

Traces Length & Width

Adjacent Heat Sources

4.0 Protection Diodes

Die Attach Material

Molding Compound Size

and Material

Under normal operation, the LM1117 regulators do not need

any protection diode. With the adjustable device, the internal

resistance between the adjust and output terminals limits the

current. No diode is needed to divert the current around the

regulator even with capacitor on the adjust terminal. The

adjust pin can take a transient signal of 25V with respect to

the output voltage without damaging the device.

Volume of Air

Ambient Temperatue

Shape of Mounting Pad

When a output capacitor is connected to a regulator and the

input is shorted to ground, the output capacitor will discharge

into the output of the regulator. The discharge current de-

pends on the value of the capacitor, the output voltage of the

regulator, and rate of decrease of V_IN. In the LM1117 regu-

lators, the internal diode between the output and input pins

can withstand microsecond surge currents of 10A to 20A.

www.national.com

Application Note (Continued)

The next parameter which must be calculated is the maxi-

mum allowable temperature rise, T_R(max):

T_R(max) = T_J(max)-T_A(max)

where T_J(max) is the maximum allowable junction tempera-

ture (125˚C), and T_A(max) is the maximum ambient tem-

perature which will be encountered in the application.

Using the calculated values for T_R(max) and P_D, the maxi-

mum allowable value for the junction-to-ambient thermal

resistance (θ_JA) can be calculated:

θ_JA= T_R(max)/P_D

10091937

If the maximum allowable value for θ_JAis found to be

≥136˚C/W for SOT-223 package or ≥79˚C/W for TO-220

package or ≥92˚C/W for TO-252 package, no heatsink is

needed since the package alone will dissipate enough heat

to satisfy these requirements. If the calculated value for θ_JA

falls below these limits, a heatsink is required.

FIGURE 5. Cross-sectional view of Integrated Circuit

Mounted on a printed circuit board. Note that the case

temperature is measured at the point where the leads

contact with the mounting pad surface

As a design aid, Table 1 shows the value of the θ_JAof

SOT-223 and TO-252 for different heatsink area. The copper

patterns that we used to measure these θ_JAs are shown at

the end of the Application Notes Section. Figure 7 and Figure

8 reflects the same test results as what are in the Table 1

The LM1117 regulators have internal thermal shutdown to

protect the device from over-heating. Under all possible

operating conditions, the junction temperature of the LM1117

must be within the range of 0˚C to 125˚C. A heatsink may be

required depending on the maximum power dissipation and

maximum ambient temperature of the application. To deter-

mine if a heatsink is needed, the power dissipated by the

regulator, P_D, must be calculated:

Figure 9 and Figure 10 shows the maximum allowable power

dissipation vs. ambient temperature for the SOT-223 and

TO-252 device. Figures Figure 11 and Figure 12 shows the

maximum allowable power dissipation vs. copper area (in²)

for the SOT-223 and TO-252 devices. Please see AN1028

for power enhancement techniques to be used with SOT-223

and TO-252 packages.

I_IN= I_L+ I_G

P_D= (V_IN-V_OUT)I + V_{IN G}

Figure 6 shows the voltages and currents which are present

in the circuit.

*Application Note AN-1187 discusses improved thermal per-

formance and power dissipation for the LLP.

10091916

FIGURE 6. Power Dissipation Diagram

TABLE 1. θ_JADifferent Heatsink Area

Copper Area

Layout

Thermal Resistance

Top Side (in²)*

Bottom Side (in²)

(θ_JA,˚C/W) SOT-223

(θ_JA,˚C/W) TO-252

0.0123

0.066

0.3

0.53

0.76

136

123

103

0.2

0.4

0.6

0.8

115

0.066

0.175

0.066

0.175

125

www.national.com

Application Note (Continued)

TABLE 1. θ_JADifferent Heatsink Area (Continued)

Layout

Copper Area Thermal Resistance

0.284

0.392

0.5

0.284

0.392

0.5

*Tab of device attached to topside copper

www.national.com

Application Note (Continued)

10091936

FIGURE 10. Maximum Allowable Power Dissipation vs.

Ambient Temperature for TO-252

10091913

FIGURE 7. θ_JAvs. 1oz Copper Area for SOT-223

10091914

10091934

FIGURE 11. Maximum Allowable Power Dissipation vs.

1oz Copper Area for SOT-223

FIGURE 8. θ_JAvs. 2oz Copper Area for TO-252

10091912

10091935

FIGURE 9. Maximum Allowable Power Dissipation vs.

Ambient Temperature for SOT-223

FIGURE 12. Maximum Allowable Power Dissipation vs.

2oz Copper Area for TO-252

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Application Note (Continued)

10091941

FIGURE 13. Top View of the Thermal Test Pattern in Actual Scale

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Application Note (Continued)

10091942

FIGURE 14. Bottom View of the Thermal Test Pattern in Actual Scale

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Typical Application Circuits

10091927

10091930

5V Logic Regulator with Electronic Shutdown*

Adjusting Output of Fixed Regulators

10091931

Regulator with Reference

10091929

1.25V to 10V Adjustable Regulator with Improved

Ripple Rejection

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Typical Application Circuits (Continued)

10091932

Battery Backed-Up Regulated Supply

10091933

Low Dropout Negative Supply

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Physical Dimensions inches (millimeters)

unless otherwise noted

3-Lead SOT-223

NS Package Number MP04A

3-Lead TO-220

NS Package Number T03B

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

3-Lead TO-263

NS Package Number TS3B

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

3-Lead TO-252

NS Package Number TD03B

8-Lead LLP

NS Package Number LDC08A

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Notes

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

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.

BANNED SUBSTANCE COMPLIANCE

National Semiconductor certifies that the products and packing materials meet the provisions of the Customer Products

Stewardship Specification (CSP-9-111C2) and the Banned Substances and Materials of Interest Specification

(CSP-9-111S2) and contain no ‘‘Banned Substances’’ as defined in CSP-9-111S2.

National Semiconductor

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Support Center

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Fax: +49 (0) 180-530 85 86

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Support Center

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Fax: 81-3-5639-7507

Email: new.feedback@nsc.com

Tel: 1-800-272-9959

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Deutsch Tel: +49 (0) 69 9508 6208

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Email: ap.support@nsc.com

Email: jpn.feedback@nsc.com

Tel: 81-3-5639-7560

www.national.com

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.

LM1117T-1.8/NOPB [TI]

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