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产品型号TL431的概述

TL431芯片的概述 TL431是一种高精度的可调参考电压源、线性调节器和光耦合器的集成电路（IC）。其主要用途是在电源管理、电压监测和电流限制等应用中提供稳定的基准电压。TL431能够在宽输入电压范围内维持设定的输出电压，广泛应用于开关电源、反激式电源以及各类需要高精度电压参考的电路中。 TL431是一种具有三端口的器件，分别是一个非反相输入端、一个反相输入端和一个输出端。其内部包含高增益运算放大器，能够恢复到非常低的偏置电流。这种结构使得TL431能被广泛用作电压基准，提供范围为1.24V到36V的输出电压。 TL431的详细参数 TL431的各项关键参数如下： - 输出电压范围: 1.24V至36V - 温度范围: -40°C至125°C - 输入电压范围: 2.5V至36V - 输出电流: 最大可达 100mA - 参考电压精度: ±1%（通常） - 温度系数: 20 ppm/...

产品型号TL431的Datasheet PDF文件预览

www.fairchildsemi.com

TL431/TL431A

Programmable Shunt Regulator

Features

Description

• Programmable Output Voltage to 36 Volts

• Low Dynamic Output Impedance 0.20 Typical

• Sink Current Capability of 1.0 to 100mA

• Equivalent Full-Range Temperature Coefficient of

50ppm/°C Typical

• Temperature Compensated For Operation Over Full Rated

Operating Temperature Range

• Low Output Noise Voltage

The TL431/TL431Aare three-terminal adjustable regulator

series with a guaranteed thermal stability over applicable

temperature ranges. The output voltage may be set to any

value between V

REF

(approximately 2.5 volts) and 36 volts

with two external resistors These devices have a typical

dynamic output impedance of 0.2W Active output circuitry

provides a very sharp turn-on characteristic, making these

devices excel lent replacement for zener diodes in many

applications.

• Fast Turn-on Response

TO-92

1. Ref 2. Anode 3. Cathode

8-DIP

1.Cathode 2.3.4.5.7.NC

6.Anode 8.Ref

8-SOP

1. Cathode 2. 3. 6. 7. Anode

8. Ref 4. 5. NC

Rev. 1.0.3

TL431/TL431A

Internal Block Diagram

Absolute Maximum Ratings

(Operating temperature range applies unless otherwise specified.)

Parameter

Symbol

Value

Unit

Cathode Voltage

Cathode Current Range (Continuous)

Reference Input Current Range

-100 ~ +150

-0.05 ~ +10

REF

Power Dissipation

D, LP Suffix Package

P Suffix Package

770

1000

Operating Temperature Range

Junction Temperature

-25 ~ +85

150

°C

OPR

Storage Temperature Range

-65 ~ +150

STG

Recommended Operating Conditions

Parameter

Symbol

Min

Typ

Max

Unit

Cathode Voltage

Cathode Current

REF

1.0

100

TL431/TL431A

Electrical Characteristics

(T = +25°C, unless otherwise specified)

TL431

TL431A

Parameter

Symbol

Conditions

Unit

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

Reference Input Voltage

, I =10mA

2.440 2.495 2.550 2.470 2.495 2.520

REF

KA REF KA

Deviation of Reference

Input Voltage Over-

Temperature (Note 1)

∆V

, I =10mA

MAX

∆V =10V-

REF

KA REF KA

4.5

- 10

-0.5

1.5

-2.7

-2.0

4.5

-1.0

-0.5

1.5

-2.7

-2.0

∆T

∆V

≤T ≤T

MIN

Ratio of Change in

Reference Input Voltage

REF

∆V

REF

=10mA

mV/V

to the Change in

Cathode Voltage

∆V =36V-

10V

=10mA,

Reference Input Current

µA

REF

R =10KΩ,R =∞

Deviation of Reference

Input Current Over Full

Temperature Range

=10mA,

R =10KΩ,R =∞

∆I

/∆T

0.4

1.2

1.0

0.4

1.2

1.0

µA

REF

=Full Range

Minimum Cathode Cur-

rent for Regulation

KA REF

0.45

0.05

0.45

0.05

KA(MIN)

Off - Stage Cathode

Current

=36V,

KA(OFF)

REF

=V ,

KA REF

Dynamic Impedance

(Note 2)

=1 to 100mA

0.15

0.5

0.15

0.5

Ω

f ≥1.0KHz

• T

= -25 °C, T = +85 °C

MIN MAX

TL431/TL431A

Test Circuits

TL431/A

Figure 2. Test Circuit for V ≥V

KA REF

Figure 1. Test Circuit for V =V

KA REF

TL431/A

Figure 3. Test Circuit for l

KA(OFF)

TL431/TL431A

Typical Perfomance Characteristics

Figure 1. Cathode Current vs. Cathode Voltage

Figure 2. Cathode Current vs. Cathode Voltage

Figure 3. Change In Reference Input Voltage vs.

Cathode Voltage

Figure 4. Dynamic Impedance Frequency

Figure 5. Small Signal Voltage Amplification vs. Frequency

Figure 6. Pulse Response

TL431/TL431A

Typical Application

R₁



















V_O= V_ref1 + ------

V_O

1 + ------ V_ref

V_O

1 + ------ V_ref





R₂

MC7805/LM7805

TL431/A

Figure 10. Shunt Regulator

Figure 11. Output Control for Three-

Termianl Fixed Regulator

Figure 12. High Current Shunt Regula-

tor

TL431/A

Figure 13. Current Limit or Current Source

Figure 14. Constant-Current Sink

TL431/TL431A

Mechanical Dimensions

Package

TO-92

+0.25

–0.15

4.58

0.46 ±0.10

+0.10

–0.05

1.27TYP

0.38

[1.27 ±0.20

]

[1.27 ±0.20]

3.60 ±0.20

(R2.29)

TL431/TL431A

Mechanical Dimensions (Continued)

Package

8-DIP

6.40 ±0.20

0.252 ±0.008

3.30 ±0.30

0.130 ±0.012

5.08

0.200

MAX

7.62

3.40 ±0.20

0.134 ±0.008

0.300

0.33

0.013

MIN

0.25 ⁺_–^0.10

0.05

0.010⁺_–^0.004

0.002

0~15

TL431/TL431A

Mechanical Dimensions (Continued)

Package

8-SOP

0.1~0.25

0.004~0.001

MIN

1.55 ±0.20

0.061 ±0.008

6.00 ±0.30

0.236 ±0.012

1.80

0.071

MAX

3.95 ±0.20

0.156 ±0.008

5.72

0.225

0.50 ±0.20

0.020 ±0.008

TL431/TL431A

Ordering Information

Product Number

TL431ACLP

TL431ACD

TL431CLP

TL431CP

Output Voltage Tolerance

Package

TO-92

8-SOP

TO-92

8-DIP

Operating Temperature

-25 ~ + 85^oC

TL431CD

8-SOP

DISCLAIMER

FAIRCHILD SEMICONDUCTOR RESERVES THE RIGHT TO MAKE CHANGES WITHOUT FURTHER NOTICE TO ANY

PRODUCTS HEREIN TO IMPROVE RELIABILITY, FUNCTION OR DESIGN. FAIRCHILD DOES NOT ASSUME ANY

LIABILITY ARISING OUT OF THE APPLICATION OR USE OF ANY PRODUCT OR CIRCUIT DESCRIBED HEREIN; NEITHER

DOES IT CONVEY ANY LICENSE UNDER ITS PATENT RIGHTS, NOR THE RIGHTS OF OTHERS.

LIFE SUPPORT POLICY

FAIRCHILD’S PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL COMPONENTS IN LIFE SUPPORT DEVICES

OR SYSTEMS WITHOUT THE EXPRESS WRITTEN APPROVAL OF THE PRESIDENT OF FAIRCHILD 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 (c) 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 of the

user.

2. A critical component in 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.

www.fairchildsemi.com

8/4/03 0.0m 001

Stock#DSxxxxxxxx

2003 Fairchild Semiconductor Corporation

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TL431产品参数

型号:	TL431
是否Rohs认证：	不符合
生命周期：	Obsolete
包装说明：	TSOP, TSOP5/6,.11,37
Reach Compliance Code：	unknown
风险等级：	5.63
JESD-30 代码：	R-PDSO-G5
端子数量：	5
最高工作温度：	105 °C
最低工作温度：
最大输出电流：	0.15 A
最大输出电压：	36 V
最小输出电压：	2.5 V
封装主体材料：	PLASTIC/EPOXY
封装代码：	TSOP
封装等效代码：	TSOP5/6,.11,37
封装形状：	RECTANGULAR
封装形式：	SMALL OUTLINE, THIN PROFILE
认证状态：	Not Qualified
子类别：	Voltage References
表面贴装：	YES
技术：	BIPOLAR
温度等级：	OTHER
端子形式：	GULL WING
端子节距：	0.95 mm
端子位置：	DUAL
Base Number Matches：	1

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产品型号TL431的概述

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