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本文档旨在为方便起见，提供有关 TI 产品中文版本的信息，以确认产品的概要。有关适用的官方英文版本的最新信息，请访问 www.ti.com，其内容始终优先。 TI 不保证翻译的准确

性和有效性。在实际设计之前，请务必参考最新版本的英文版本。

English Data Sheet: SGLS302

TL431-Q1

TL432-Q1

ZHCSK06F –MARCH 2005–REVISED JULY 2019

TL431-Q1/TL432-Q1 可可调调精精密密并并联联稳稳压压器器

1 特特性性

• 符合汽车类应用要求

• 具有符合 AEC-Q100 测试指导的以下结果：

– 器件温度等级 1：-40°C 至 125°C 的环境运行

温度范围

• 25°C 下的基准电压容差：

– 1%（A 级）

– 0.5%（B 级）

• 温漂典型值：

– 14mV（Q 级温度）

• 低输出噪声

• 0.2Ω 输出阻抗典型值

• 灌电流能力：1mA 至 100mA

• 可调节输出电压：V

REF

至 36V

2 应应用用

• 可调节电压和电流基准

• 反激式开关模式电源 (SMPS) 中的二次侧稳压

• 齐纳二极管替代产品

• 电压监控

• 具有集成基准电压的比较器

3 说说明明

TL431LI-Q1/TL432LI-Q1 是 TL431-Q1/TL432-Q1 的

引脚对引脚替代品。TL43xLI-Q1 具有更好的稳定性、

更低温漂 (VI(dev)) 以及更低基准电流 (Iref)，可提高系

统精度。

TL431-Q1 是一款三引脚可调并联稳压器，在适用的汽

车级温度范围内具有额定的热稳定性。通过两个外部电

阻器即可将输出电压设置为 V

REF

（大约 2.5V）至 36V

之间的任意值（参见图 28）。该器件具有 0.2Ω 的输

出阻抗典型值。有源输出电路可提供非常急剧的导通特

性，从而使该器件成为许多应用中齐纳二极管的出色

替代品，这些应用包括板载稳压、可调节电源和开关电

源。

TL432-Q1 具有与 TL431-Q1 器件完全相同的功能和电

气规格，但是具有不同的 DBZ 封装引脚排布。

器器件件信信息息

(1)

器器件件型型号号封封装装封封装装尺尺寸寸（（标标称称值值））

TL431A-Q1 SOT-23 (5) 2.90mm × 1.60mm

TL43x-Q1 SOT-23 (3) 2.92mm × 1.30mm

(1) 如需了解所有可用封装，请参阅数据表末尾的可订购产品附

录。

简简化化原原理理图图

TL431-Q1

TL432-Q1

ZHCSK06F –MARCH 2005–REVISED JULY 2019

www.ti.com.cn

目目录录

1 特特性性.......................................................................... 1

2 应应用用.......................................................................... 1

3 说说明明.......................................................................... 1

4 修修订订历历史史记记录录 ........................................................... 2

5 Pin Configuration and Functions......................... 3

6 Specifications......................................................... 4

6.1 Absolute Maximum Ratings ...................................... 4

6.2 ESD Ratings.............................................................. 4

6.3 Recommended Operating Conditions....................... 4

6.4 Thermal Information.................................................. 4

6.5 Electrical Characteristics: TL43x-Q1......................... 4

6.6 Electrical Characteristics: TL43xA-Q1 ...................... 5

6.7 Electrical Characteristics: TL43xB-Q1 ...................... 5

6.8 Typical Characteristics.............................................. 6

7 Parameter Measurement Information .................. 9

8 Detailed Description............................................ 11

8.1 Overview ................................................................. 11

8.2 Functional Block Diagram ....................................... 11

8.3 Feature Description................................................. 12

8.4 Device Functional Modes........................................ 12

9 Application and Implementation ........................ 13

9.1 Application Information............................................ 13

9.2 Typical Applications ................................................ 13

10 Power Supply Recommendations ..................... 18

11 Layout................................................................... 18

11.1 Layout Guidelines ................................................. 18

11.2 Layout Example .................................................... 18

12 器器件件和和文文档档支支持持 ..................................................... 19

12.1 文档支持................................................................ 19

12.2 相关链接................................................................ 19

12.3 接收文档更新通知 ................................................. 19

12.4 社区资源................................................................ 19

12.5 商标 ....................................................................... 19

12.6 静电放电警告......................................................... 19

12.7 Glossary................................................................ 19

13 机机械械、、封封装装和和可可订订购购信信息息....................................... 20

4 修修订订历历史史记记录录

注：之前版本的页码可能与当前版本有所不同。

Changes from Revision E (November 2016) to Revision F Page

• TL431LI-Q1/TL432LI-Q1 是 TL431-Q1/TL432-Q1 的引脚对引脚替代品。TL43xLI-Q1 具有更好的稳定性、更低温漂

(VI(dev)) 以及更低基准电流 (Iref)，可提高系统精度。........................................................................................................... 1

• 合并了 TL431-Q1 与 TL432-Q1 数据表 .................................................................................................................................. 1

Changes from Revision D (March 2013) to Revision E Page

• 已添加

应用

部分、

器件信息

表、

引脚配置和功能

部分、

规格

部分、ESD

额定值

表、

详细说明

部分、

应用和实现

部分、

电源建议

部分、

布局

部分、

器件和文档支持

部分以及

机械、封装和可订购信息

部分 ............................................... 1

• 已删除

订购信息

表；请参阅数据表末尾的

封装选项附录

....................................................................................................... 1

• Added Thermal Information table ........................................................................................................................................... 4

• Changed R

θJA

values for 5-pin DBV (SOT-23) From: 206 To: 215 and for 3-pin DBZ (SOT-23) From: 206 To: 334.7 ......... 4

TL431-Q1

TL432-Q1

ZHCSK06F –MARCH 2005–REVISED JULY 2019

www.ti.com.cn

(1) Stresses beyond those listed under Absolute Maximum Ratings may cause permanent damage to the device. These are stress ratings

only, which do not imply functional operation of the device at these or any other conditions beyond those indicated under Recommended

Operating Conditions. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.

(2) Voltage values are with respect to the ANODE pin, unless otherwise noted.

6 Specifications

6.1 Absolute Maximum Ratings

over operating free-air temperature range (unless otherwise noted)

(1)

MIN MAX UNIT

Cathode voltage

(2)

37 V

Continuous cathode current –100 150 mA

Reference input current

Low –50 µA

High 10 mA

Operating junction temperature, T

150 °C

Storage temperature, T

stg

–65 150 °C

(1) AEC Q100-002 indicates that HBM stressing shall be in accordance with the ANSI/ESDA/JEDEC JS-001 specification.

6.2 ESD Ratings

VALUE UNIT

(ESD)

Electrostatic discharge

Human-body model (HBM), per AEC Q100-002

(1)

±2500

VCharged-device model (CDM), per AEC Q100-011 ±1000

Machine model (MM) ±200

6.3 Recommended Operating Conditions

over operating free-air temperature range (unless otherwise noted)

MIN MAX UNIT

Cathode voltage V

REF

36 V

Cathode current 1 100 mA

Operating free-air temperature –40 125 °C

(1) For more information about traditional and new thermal metrics, see the Semiconductor and IC Package Thermal Metrics application

report.

6.4 Thermal Information

THERMAL METRIC

(1)

TL43x-Q1

UNITDBV (SOT-23) DBZ (SOT-23)

5 PINS 3 PINS

θJA

Junction-to-ambient thermal resistance 215 334.7 °C/W

θJC(top)

Junction-to-case (top) thermal resistance 135.2 113.5 °C/W

θJB

Junction-to-board thermal resistance 43 67.6 °C/W

Junction-to-top characterization parameter 19.6 6.7 °C/W

Junction-to-board characterization parameter 42.1 65.9 °C/W

(1) The deviation parameters (V

I(DEV)

and I

I(DEV)

) are defined as the differences between the maximum and minimum values obtained over

the recommended temperature range.

6.5 Electrical Characteristics: TL43x-Q1

over recommended operating conditions, T

= 25°C (unless otherwise noted)

PARAMETER TEST CONDITIONS MIN TYP MAX UNIT

REF

Reference voltage V

= V

REF

, I

= 10 mA, see Figure 20 2440 2495 2550 mV

I(DEV)

Deviation of reference voltage over full

temperature

(1)

= V

REF

, I

= 10 mA, T

= –40°C to 125°C,

see Figure 20

14 34 mV

ΔV

REF

/ΔV

Ratio of change in reference voltage to the

change in cathode voltage

= 10 mA,

see Figure 21

ΔV

= 10 V – V

REF

–1.4 –2.7

mV/V

ΔV

= 36 V – 10 V –1 –2

TL431-Q1

TL432-Q1

www.ti.com.cn

ZHCSK06F –MARCH 2005–REVISED JULY 2019

Electrical Characteristics: TL43x-Q1 (continued)

over recommended operating conditions, T

= 25°C (unless otherwise noted)

PARAMETER TEST CONDITIONS MIN TYP MAX UNIT

REF

Reference current I

= 10 mA, R1 = 10 kΩ, R2 = ∞, see Figure 21 2 4 µA

I(DEV)

Deviation of reference current over full

temperature

(1)

= 10 mA, R1 = 10 kΩ, R2 = ∞,

= –40°C to 125°C, see Figure 21

0.8 2.5 µA

MIN

Minimum cathode current for regulation V

= V

REF

, see Figure 20 0.4 1 mA

OFF

OFF-state cathode current V

= 36 V, V

REF

= 0, see Figure 22 0.1 1 µA

| Dynamic impedance

(1)

= 1 mA to 100 mA, V

= V

REF

, f ≤ 1 kHz,

see Figure 20

0.2 0.5 Ω

(1) The deviation parameters (V

I(DEV)

and I

I(DEV)

) are defined as the differences between the maximum and minimum values obtained over

the recommended temperature range.

6.6 Electrical Characteristics: TL43xA-Q1

over recommended operating conditions, T

= 25°C (unless otherwise noted)

PARAMETER TEST CONDITIONS MIN TYP MAX UNIT

REF

Reference voltage V

= V

REF

, I

= 10 mA, see Figure 20 2470 2495 2520 mV

I(DEV)

Deviation of reference voltage over full

temperature

(1)

= V

REF

, I

= 10 mA, T

= –40°C to 125°C,

see Figure 20

14 34 mV

ΔV

REF

/ΔV

Ratio of change in reference voltage to the

change in cathode voltage

= 10 mA,

see Figure 21

ΔV

= 10 V – V

REF

–1.4 –2.7

mV/V

ΔV

= 36 V – 10 V –1 –2

REF

Reference current I

= 10 mA, R1 = 10 kΩ, R2 = ∞, see Figure 21 2 4 µA

I(DEV)

Deviation of reference current over full

temperature

(1)

= 10 mA, R1 = 10 kΩ, R2 = ∞,

= –40°C to 125°C, see Figure 21

0.8 2.5 µA

MIN

Minimum cathode current for regulation V

= V

REF

, see Figure 20 0.4 0.7 mA

OFF

OFF-state cathode current V

= 36 V, V

REF

= 0, see Figure 22 0.1 0.5 µA

| Dynamic impedance

(1)

= 1 mA to 100 mA, V

= V

REF

, f ≤ 1 kHz,

see Figure 20

0.2 0.5 Ω

(1) The deviation parameters (V

I(DEV)

and I

I(DEV)

) are defined as the differences between the maximum and minimum values obtained over

the recommended temperature range.

6.7 Electrical Characteristics: TL43xB-Q1

over recommended operating conditions, T

= 25°C (unless otherwise noted)

PARAMETER TEST CONDITIONS MIN TYP MAX UNIT

REF

Reference voltage V

= V

REF

, I

= 10 mA, see Figure 20 2483 2495 2507 mV

I(DEV)

Deviation of reference voltage over full

temperature

(1)

= V

REF

, I

= 10 mA, T

= –40°C to 125°C,

see Figure 20

14 34 mV

ΔV

REF

/ΔV

Ratio of change in reference voltage to the

change in cathode voltage

= 10 mA,

see Figure 21

ΔV

= 10 V – V

REF

–1.4 –2.7

mV/V

ΔV

= 36 V – 10 V –1 –2

REF

Reference current I

= 10 mA, R1 = 10 kΩ, R2 = ∞, see Figure 21 2 4 µA

I(DEV)

Deviation of reference current over full

temperature

(1)

= 10 mA, R1 = 10 kΩ, R2 = ∞,

= –40°C to 125°C, see Figure 21

0.8 2.5 µA

MIN

Minimum cathode current for regulation V

= V

REF

, see Figure 20 0.4 0.7 mA

OFF

OFF-state cathode current V

= 36 V, V

REF

= 0, see Figure 22 0.1 0.5 µA

| Dynamic impedance

(1)

= 1 mA to 100 mA, V

= V

REF

, f ≤ 1 kHz,

see Figure 20

0.2 0.5 Ω

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