LM431SACM32X [ONSEMI]

Programmable Shunt Regulator;


型号：	LM431SACM32X
厂家：	ONSEMI
描述：	Programmable Shunt Regulator 光电二极管输出元件
文件：	总12页 (文件大小：260K)
中文：	中文翻译
下载：	下载PDF数据表文档文件

LM431SA, LM431SB,

LM431SC

Programmable Shunt

Regulator

Description

The LM431SA / LM431SB / LM431SC are three−terminal the

output adjustable regulators with thermal stability over operating

temperature range. The output voltage can be set any value between

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REF

(approximately 2.5 V) and 36 V with two external resistors.

These devices have a typical dynamic output impedance of 0.2 W.

Active output circuit provides a sharp turn−on characteristic, making

these devices excellent replacement for zener diodes in many

applications.

1. Ref

2. Anode

3. Cathode

SOT−89

CASE 528AH

Features

• Programmable Output Voltage to 36 V

• Low Dynamic Output Impedance: 0.2 W (Typical)

• Sink Current Capability: 1.0 to 100 mA

• Equivalent Full−Range Temperature Coefficient of 50 ppm/°C

(Typical)

1. Cathode

2. Ref

3. Anode

SOT−23FL

CASE 419BD

• Temperature Compensated for Operation Over Full Rated Operating

Temperature Range

M32

1. Ref

2. Cathode

3. Anode

1. Cathode

2. Ref

• Low Output Noise Voltage

• Fast Turn−on Response

3. Anode

SOT−23

CASE 318BM

• These Devices are Pb−Free, Halogen Free/BFR Free and are RoHS

Compliant

ORDERING INFORMATION

Output Voltage

Tolerance

Operating

Temperature

(1)

†

Top Mark

Product Number

LM431SACMFX

LM431SACM3X

LM431SACM32X

LM431SBCMLX

LM431SBCMFX

LM431SBCM3X

LM431SBCM32X

LM431SCCMLX

LM431SCCMFX

LM431SCCM3X

LM431SCCM32X

LM431SAIMFX

LM431SBIMFX

LM431SCIMFX

Package

Shipping

−25 to +85_C

Tape and Reel

43A □

43L ◎

43G ◎

43B

SOT−23FL 3L

SOT−23 3L

SOT−89 3L

SOT−23FL 3L

SOT−23 3L

SOT−89 3L

SOT−23FL 3L

SOT−23 3L

SOT−23FL 3L

43B □

43M ◎

43H ◎

43C

0.5%

43C □

43N ◎

43J ◎

43AI

−40 to +85_C

43BI

0.5%

43CI

†For information on tape and reel specifications, including part orientation and tape sizes, please refer to our Tape and Reel Packaging

Specification Brochure, BRD8011/D.

1. SOT−23 and SOT−23FL have basically four−character marking except LM431SAIMFX. (3 letters for device code + 1 letter for date code)

SOT−23FL date code is composed of 1 digit numeric or alphabetic week code adding bar−type year code.

Publication Order Number:

July, 2018 − Rev. 8

LM431SA/D

LM431SA, LM431SB, LM431SC

Block Diagram

Figure 1. Block Diagram

ABSOLUTE MAXIMUM RATINGS (T = 25°C unless otherwise noted)

Symbol

Parameter

Value

Unit

Cathode Voltage

Cathode current Range (Continuous)

Reference Input Current Range

−100 to +150

−0.05 to +10.00

220

°C/W

REF

ML Suffix Package (SOT−89)

MF Suffix Package (SOT−23FL)

M32, M3 Suffix Package (SOT−23)

ML Suffix Package (SOT−89)

MF Suffix Package (SOT−23FL)

M32, M3 Suffix Package (SOT−23)

(2, 3)

Thermal Resistance Junction−Air

350

400

(4, 5)

Power Dissipation

560

350

310

Junction Temperature

150

°C

All products except LM431SAIMFX

LM431SAIMFX, SBIMFX, SCIMFX

−25 to +85

−40 to +85

−65 to +150

Operating Temperature Range

OPR

Storage Temperature Range

°C

STG

Stresses exceeding those listed in the Maximum Ratings table may damage the device. If any of these limits are exceeded, device functionality

should not be assumed, damage may occur and reliability may be affected.

2. Thermal resistance test board

Size: 1.6 mm x 76.2 mm x 114.3 mm (1S0P) JEDEC Standard: JESD51−3, JESD51−7.

3. Assume no ambient airflow.

4. T

= 150°C; ratings apply to ambient temperature at 25°C.

JMAX

5. Power dissipation calculation: P_D= (T − T ) / R

RECOMMENDED OPERATING CONDITIONS

Symbol

Parameter

Min.

Max.

Unit

Cathode Voltage

Cathode Current

REF

100

Functional operation above the stresses listed in the Recommended Operating Ranges is not implied. Extended exposure to stresses beyond

the Recommended Operating Ranges limits may affect device reliability.

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LM431SA, LM431SB, LM431SC

ELECTRICAL CHARACTERISTICS (Note 6, Values are at T = 25°C unless otherwise noted)

LM431SA

LM431SB

LM431SC

Symbol

Parameter

Conditions

Min. Typ. Max. Min. Typ. Max. Min. Typ. Max. Unit

Reference Input

Voltage

VREF

V_KA= V_REF, I_KA= 10 mA

2.450 2.500 2.550 2.470 2.495 2.520 2.482 2.495 2.508

SOT−89

SOT−23FL

4.5

6.6

17.0

4.5

6.6

17.0

4.5

6.6

17.0 mV

Deviation of Refer-

ence Input Voltage

Over− Tempera-

ture

VKA = VREF,

I_KA= 10 mA

TMIN ≤ TA ≤ TMAX

/ DT

REF

SOT−23

Ratio of Change in

Reference Input

Voltage to the

Change in Cath-

ode Voltage

−1.0 −2.7

−0.5 −2.0

−1.0 −2.7

−0.5 −2.0

−1.0 −2.7

−0.5 −2.0

10 V−V_REF

REF

mV/V

I_KA=10 mA

36 V − 10 V

Reference Input

Current

μA

IREF

1.5

4.0

1.5

4.0

1.5

4.0

I_KA= 10 mA, R₁= 10 KW, R₂= ∞

SOT−89

SOT−23FL

Deviation of Refer-

ence Input Current

Over Full Temper-

ature Range

I_KA= 10 mA,

R₁= 10 KW,

R₂= ∞,

T_A= Full Range

μA

0.4

0.8

1.2

2.0

0.4

0.8

1.2

2.0

0.4

0.8

1.2

2.0

REF

/ DT

SOT−23

Minimum Cathode

Current for Regu-

lation

IKA(MIN)

0.45 1.00

0.45 1.00 mA

VKA = VREF

Off −Stage Cath-

ode Current

μA

IKA(OFF)

ZKA

V_KA= 36 V, V_REF= 0

0.05 1.00

0.15 0.50

0.05 1.00

0.15 0.50

0.05 1.00

0.15 0.50

VKA = VREF, I_KA= 1 to 100 mA,

f ≥ 1.0 kHz

Dynamic Imped-

ance

Product parametric performance is indicated in the Electrical Characteristics for the listed test conditions, unless otherwise noted. Product

performance may not be indicated by the Electrical Characteristics if operated under different conditions.

6. LM431SAI, LM431SBI, LM431SCI: − T_A(min)= −40_C, T_A(max)= +85_C

All other pins: − T_A(min)= −25_C, T_A(max)= +85_C

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LM431SA, LM431SB, LM431SC

ELECTRICAL CHARACTERISTICS (Continued) (Notes 7 and 8, Values are at T = 25°C unless otherwise noted)

LM431SAI

LM431SBI

LM431SCI

Min. Typ. Max. Min. Typ. Max. Min. Typ. Max.

Symbol

Parameter

Conditions

Unit

Reference Input

Voltage

V_KA= V_REF, I_KA= 10 mA

2.450 2.500 2.550 2.470 2.495 2.520 2.482 2.495 2.508

REF

Deviation of Refer-

ence Input Voltage

Over−Temperature

V_KA= V_REF, I_KA= 10 mA, TMIN ≤ TA ≤

TMAX

REF(dev)

DV = 10 V−V_REF

−1.0 −2.7

−0.5 −2.0

−1.0 −2.7

−0.5 −2.0

−1.0 −2.7

−0.5 −2.0

Ratio of Change in

Reference Input Volt-

age to Change in

Cathode Voltage

REF

mV/V

μA

I_KA= 10 mA

DV = 36 V − 10 V

Reference Input

Current

I_KA= 10 mA, R₁=10 KW, R₂= ∞

1.5

0.8

4.0

2.0

1.5

0.8

4.0

2.0

1.5

0.8

4.0

2.0

REF

Deviation of Refer-

ence Input Current

Over Full Temperature

Range

I_KA= 10 mA, R₁= 10 KW, R₂= ∞,

TMIN ≤ TA ≤ TMAX

μA

REF(dev)

Minimum Cathode

Current for Regulation

0.45 1.00

0.05 1.00

0.15 0.50

0.45 1.00

0.05 1.00

0.15 0.50

0.45 1.00 mA

VKA = VREF

KA(MIN)

Off −Stage Cathode

Current

V_KA= 36 V, V_REF= 0

0.05 1.00

0.15 0.50

μA

KA(OFF)

V_KA= V_REF, I_KA= 1 to 100 mA,

Dynamic Impedance

ZKA

f ≥ 1.0 kHz

7. LM431SAI, LM431SBI, LM431SCI: − T_A(min)= −40_C, T_A(max)= +85_C

All other pins: − T_A(min)= −25_C, T_A(max)= +85_C

8. The deviation parameters V_REF(dev)and I_REF(dev)are defined as the differences between the maximum and minimum values obtained over the

rated temperature range. The average full−range temperature coefficient of the reference input voltage, αV_REF, is defined as:

REF(dev)

Ǔ_{@ 10}

(at 25°C)

REF

ppm

_|ǒ Ǔ₊

°C

where T

−T

is the rated operating free−air temperature range

|aV_REF

MAX

MIN

T_MAX* T_MIN

of the device.

can be positive or negative, depending on whether minimum

REF

or maximum

, respectively, occurs at the lower

REF

REF(min)

temperature.

Example:

REF(dev)

= 4.5 mV, V

= 2500 mV at 25°C,

REF(dev)

REF

−T

MIN

= 125°C for LM431SAI.

MAX

REF(max)

4.5 mV

Ǔ_{@ 10}

2500 mV

|aV_REF| +

+ 14.4 ppmń°C

125°C

T^MAX-TMIN

Because minimum V

coefficient is positive.

occurs at the lower temperature, the

REF

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LM431SA, LM431SB, LM431SC

TEST CIRCUITS

LM431S

Figure 2. Test Circuit for V_KA= V_REF

Figure 3. Test Circuit for V_KA. V_REF

LM431S

Figure 4. Test Circuit for I_KA(OFF)

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LM431SA, LM431SB, LM431SC

TYPICAL APPLICATIONS

R₁

₊ǒ_{1 )}Ǔ

R₂

R₁

₊ǒ_{1 )}Ǔ

R₂

V_O

V_ref

V_O

V_ref

LM7805/MC7805

LM431S

Figure 5. Shunt Regulator

Figure 6. Output Control for Three−Terminal Fixed

Regulator

R₁

R₂

₊ǒ_{1 )}Ǔ

V_O

V_ref

LM431S

Figure 7. High Current Shunt Regulator

LM431S

Figure 9. Constant−Current Sink

Figure 8. Current Limit or Current Source

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LM431SA, LM431SB, LM431SC

TYPICAL PERFORMANCE CHARACTERISTICS

150

100

800

= V

REF

= V

KA REF

= 25°C

600

400

200

= 25°C

KA(MIN)

−50

−100

−200

−2

−1

0 1

V_KA, Cathode Voltage (V)

−1

− Cathode Voltage (V)

Figure 10. Cathode Current vs. Cathode Voltage

Figure 11. Cathode Current vs. Cathode Voltage

0.20

0.18

0.16

0.14

0.12

0.10

0.08

0.06

0.04

0.02

0.00

3.5

3.0

2.5

2.0

1.5

1.0

0.5

0.0

−50

−25

100

125

−50 −25

100

125 150

T − Ambient Temperature (°C)

T −^TA^,m^Amb^bie^ien^ntt^TT^ee^mm^pep^rae^tr^uCa^re)tu⁽re (°C)

Figure 13. Reference Input Current vs. Ambient

Temperature

Figure 12. OFF−State Cathode Current vs. Ambient

Temperature

= 25°C

INPUT

= 10 mA

OUTPUT

−10

10k

100k

10M

Frequency (Hz)

Time (ms)

Figure 15. Pulse Response

Figure 14. Frequency vs. Small Signal Voltage

Amplification

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LM431SA, LM431SB, LM431SC

140

120

100

A. V = Vref

B. V = 5.0 V @ I = 10 mA

= 25°C

100p

10n

100n

10?

0.0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 2.0

C − Load Capacitance

Anode−Ref. Voltage(V)

Anode−Ref. Voltage (V)

Figure 17. Anode−Reference Diode Curve

Figure 16. Stability Boundary Conditions

2.51

2.50

2.49

2.48

2.47

2.46

0.0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 2.0

−50

−25

100

125

Ref.−Cathode Voltage(V)

Ref.−Cathode Voltage (V)

T − Ambient Temperature (°C)

Figure 19. Reference Input Voltage vs. Ambient

Temperature

Figure 18. Reference−Cathode Diode Curve

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LM431SA, LM431SB, LM431SC

PACKAGE DIMENSIONS

SOT−23

CASE 318BM

ISSUE O

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LM431SA, LM431SB, LM431SC

PACKAGE DIMENSIONS

SOT−23FL

CASE 419BD

ISSUE O

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LM431SA, LM431SB, LM431SC

PACKAGE DIMENSIONS

SOT−89 3 LEAD

CASE 528AH

ISSUE O

4.70

4.30

2.23 MIN

0.50 X 45

5.30 MIN

0.30 X 45

1.87

1.45

1.40

SYMM

2.70

2.30

4.50

3.90

1.30

0.89

2.00 MIN

0.52

(2X)

0.30

0.10

0.54

C A B

1.50

0.90 MIN 2X

0.96 MIN

3.00

1.50

3.00 MIN

1.70

1.30

LAND PATTERN

RECOMMENDATION

SEATING PLANE

0.60

0.40

0.50

0.35

2.29

2.13

2.70

NOTES: UNLESS OTHERWISE SPECIFIED.

A. REFERENCE TO JEDEC TO-243 VARIATION AA.

B. ALL DIMENSIONS ARE IN MILLIMETERS.

DOES NOT COMPLY JEDEC STANDARD VALUE.

D. DIMENSIONS ARE EXCLUSIVE OF BURRS,

MOLD FLASH AND TIE BAR PROTRUSION.

E. DIMENSION AND TOLERANCE AS PER ASME

Y14.5−1994.

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LM431SA, LM431SB, LM431SC

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◊

LM431SA/D

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LM431SACM32X [ONSEMI]

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