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TPS543820 具有内部补偿高级电流模式控制功能的 TPS543820 4V 至 18V 输入、

83668A 同步 SWIFT™ 降压转换器

1 特性

• 固定频率、内部补偿高级电流模式 (ACM) 控制

• 集成式 25mΩ 和 6.5mΩ MOSFET

• 输入电压范围：4V 至 18V

• 输出电压范围：0.5V 至 7V

• 三种可选的 PWM 斜坡选项，可优化控制环路性能

• 五种可选的开关频率：500kHz、750kHz、1MHz、

1.5MHz 和 2.2MHz

• 与一个外部时钟同步

• 0.5V，整个温度范围内的电压基准精度为 ±0.5%

• 可选的软启动时间：0.5ms、1ms、2ms 和 4ms

• 单调启动至预偏置输出

• 可选的电流限制，支持 8A 和 6A 运行

• 具有可调节输入欠压锁定功能的使能端

• 电源正常输出监视器

• 输出过压、输出欠压、输入欠压、过流和过热保护

• 与 TPS543620 和 TPS543320 引脚对引脚兼容

• –40°C 至 150°C 的工作结温范围

• 2.5mm × 3mm 14 引脚 VQFN-HR 封装，间距为

0.5mm

2 应用

• 无线基础设施和有线通信设备

• 光纤网络

• 测试和测量

• 医疗和保健

3 说明

TPS543820TPS543820 是一款高效的 18V、8A 同

步降压转换器，其中采用了内部补偿固定频率高级电流

模式控制。该器件能够在以高达 2.2MHz 的开关频率

运行时提供高效率。

™

该器件采用 2.5mm × 3mm 小

型 HotRod VQFN 封装，并且在高频率下具有很高的效

率，因此成为需要小解决方案尺寸的设计的理想选择。

固定频率控制器可以在 500kHz 至 2.2MHz 范围内运

行，并且可以通过 SYNC 引脚与外部时钟同步。其他

功能包括高精度电压基准、可选的软启动时间、单调启

动至预偏置输出、可选的电流限制、可调 UVLO（通过

EN 引脚实现）以及全套故障保护。

器件信息

器件型号封装

(1)

封装尺寸（标称值）

TPS543820 VQFN-HR (14) 2.50mm x 3.00mm

(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。

TPS543820

MODE

BOOT

PGOOD

VIN

SYNC/FSEL

PGND

BP5

AGND

OUT

简化版原理图

Output Current (A)

Efficiency (%)

0 1 2 3 4 5 6 7 8

100

12 V to 0.8 V, 1 MHz

12 V to 1 V, 1 MHz

12 V to 1.2 V, 1 MHz

12 V to 1.8 V, 1 MHz

效率

TPS543820

ZHCSLZ3B – MAY 2020 – REVISED JUNE 2021

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: SLUSED1

Table of Contents

1 特性................................................................................... 1

2 应用................................................................................... 1

3 说明................................................................................... 1

4 Revision History.............................................................. 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 ............................................5

6.6 Typical Characteristics................................................ 7

7 Detailed Description........................................................9

7.1 Overview..................................................................... 9

7.2 Functional Block Diagram........................................... 9

7.3 Feature Description.....................................................9

7.4 Device Functional Modes..........................................16

8 Application and Implementation.................................. 17

8.1 Application Information............................................. 17

8.2 Typical Applications.................................................. 17

9 Power Supply Recommendations................................34

10 Layout...........................................................................35

10.1 Layout Guidelines................................................... 35

10.2 Layout Example...................................................... 35

11 Device and Documentation Support..........................37

11.1 接收文档更新通知................................................... 37

11.2 支持资源..................................................................37

11.3 Trademarks............................................................. 37

11.4 Electrostatic Discharge Caution.............................. 37

11.5 术语表..................................................................... 37

12 Mechanical, Packaging, and Orderable

Information.................................................................... 38

4 Revision History

注：以前版本的页码可能与当前版本的页码不同

Changes from Revision A (February 2021) to Revision B (June 2021) Page

• Changed 10-ns transient to 20-ns transient........................................................................................................4

• Changed VIN to SW, transient 20 ns min value to -6......................................................................................... 4

• Changed SW, transient 20 ns min value to -5.................................................................................................... 4

• Added T

OFF(min)

max value................................................................................................................................. 5

• Added text for considering minimum off-time for fsw selection.........................................................................18

Changes from Revision * (December 2020) to Revision A (February 2021) Page

• Changed max V

OUT

to 7 V..................................................................................................................................4

TPS543820

ZHCSLZ3B – MAY 2020 – REVISED JUNE 2021

www.ti.com.cn

2 Submit Document Feedback

Product Folder Links: TPS543820

6 Specifications

6.1 Absolute Maximum Ratings

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

(1)

MIN MAX UNIT

Input voltage VIN -0.3 20 V

Input voltage VIN to SW, DC -0.3 20 V

Input voltage VIN to SW, transient 20 ns -6 25 V

Input voltage BOOT -0.3 25 V

Input voltage BOOT to SW -0.3 6 V

Input voltage EN, PGOOD, MODE, SYNC/FSEL, FB -0.3 6 V

Output voltage SW, DC -0.3 20 V

Output voltage SW, transient 20 ns -5 22 V

Operating junction

temperature, T

Operating junction temperature, T

-40 150 °C

Storage temperature, T

stg

–55 150 °C

(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.

6.2 ESD Ratings

VALUE UNIT

(ESD)

Electrostatic discharge

Human-body model (HBM), per ANSI/ESDA/JEDEC

JS-001

(1)

±2000 V

(ESD)

Electrostatic discharge

Charged-device model (CDM), per JEDEC specification

JESD22-C101

(2)

±500 V

(1) JEDEC document JEP155 states that 500-V HBM allows safe manufacturing with a standard ESD control process.

(2) JEDEC document JEP157 states that 250-V CDM allows safe manufacturing with a standard ESD control process.

6.3 Recommended Operating Conditions

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

MIN NOM MAX UNIT

Input voltage V

4 18 V

Output voltage V

OUT

0.5 7 V

Output current I

OUT

8 A

Operating junction temperature -40 150 °C

SYNC

External clock frequency 400 2600 kHz

6.4 Thermal Information

THERMAL METRIC

(1)

TPS543820

UNITRPY (QFN, JEDEC) RPY (QFN, TI EVM)

14 PINS 14 PINS

θJA

Junction-to-ambient thermal resistance 58.9 29.1 °C/W

θJC(top)

Junction-to-case (top) thermal resistance 37.8 Not applicable

(2)

°C/W

θJB

Junction-to-board thermal resistance 7.3 Not applicable

(2)

°C/W

Junction-to-top characterization parameter 0.9 1.8 °C/W

Junction-to-board characterization parameter 7.2 13.4 °C/W

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

report.

(2) Not applicable to an EVM layout.

TPS543820

ZHCSLZ3B – MAY 2020 – REVISED JUNE 2021

www.ti.com.cn

4 Submit Document Feedback

Product Folder Links: TPS543820

6.5 Electrical Characteristics

= –40 °C to +150°C, V

VIN

= 4 V - 18 V (unless otherwise noted)

PARAMETER TEST CONDITIONS MIN TYP MAX UNIT

SUPPLY VOLTAGE

Q(VIN)

VIN operating non-switching supply current

= 1.3 V, V

= 550 mV, V

VIN

= 12 V, 1

MHz

1200 1600 µA

SD(VIN)

VIN shutdown supply current V

= 0 V, V

VIN

= 12 V 15 25 µA

VIN UVLO rising threshold VIN rising 3.9 4 4.1 V

VIN UVLO hysteresis 150 mV

ENABLE AND UVLO

EN(rise)

EN voltage rising threshold EN rising, enable switching 1.2 1.25 V

EN(fall)

EN voltage falling threshold EN falling, disable switching 1.05 1.1 V

EN(hyst)

EN voltage hysteresis 100 mV

EN pin sourcing current V

= 1.1 V 0.4 1.5 µA

EN pin sourcing current V

= 1.3 V 11.6 µA

INTERNAL LDO BP5

BP5

Internal LDO BP5 output voltage V

VIN

= 12 V 4.5 V

BP5 dropout voltage V

VIN

– V

BP5

, V

VIN

= 3.8 V 350 mV

BP5 short-circuit current limit V

VIN

= 12 V 75 mA

REFERENCE VOLTAGE

Feedback Voltage T

= –40°C to 150°C 497.5 500 502.5 mV

FB(LKG)

Input leakage current into FB pin

= 500 mV, non-switching, V

VIN

= 12 V,

= 0 V

1 nA

SWITCHING FREQUENCY AND OSCILLATOR

Switching frequency R

MODE

= 24.3 kΩ 450 500 550 kHz

Switching frequency R

MODE

= 17.4 kΩ 675 750 825 kHz

Switching frequency R

MODE

= 11.8 kΩ 900 1000 1100 kHz

Switching frequency R

MODE

= 8.06 kΩ 1350 1500 1650 kHz

Switching frequency R

MODE

= 4.99 kΩ 1980 2200 2420 kHz

SYNCHRONIZATION

IH(sync)

High-level input voltage 1.8 V

IL(sync)

Low-level input voltage 0.8 V

SOFT-START

SS1

Soft-start time R

MODE

= 1.78 kΩ 0.5 ms

SS2

Soft-start time R

MODE

= 2.21 kΩ 1 ms

SS3

Soft-start time R

MODE

= 2.74 kΩ 2 ms

SS4

Soft-start time R

MODE

= 3.32 kΩ 4 ms

POWER STAGE

DS(on)HS

High-side MOSFET on-resistance T

= 25°C, V

VIN

= 12 V, V

BOOT-SW

= 4.5 V 25 mΩ

DS(on)LS

Low-side MOSFET on-resistance T

= 25°C, V

BP5

= 4.5 V 6.5 mΩ

BOOT-SW(UV_r)

BOOT-SW UVLO rising threshold V

BOOT-SW

rising 3.2 V

BOOT-SW(UV_f)

BOOT-SW UVLO falling threshold V

BOOT-SW

falling 2.8 V

ON(min)

Minimum ON pulse width I

OUT

> ½ I

L_PK-PK

30 37 ns

OFF(min)

Minimum OFF pulse width

(1)

115 140 ns

CURRENT SENSE AND OVERCURRENT PROTECTION

OC_HS_pk1

High-side peak current limit R

MODE

= 1.78 kΩ 11.7 12.2 12.7 A

OC_HS_pk2

High-side peak current limit R

MODE

= 22.1 kΩ 8.6 9 9.6 A

OC_LS_src1

Low-side sourcing current limit R

MODE

= 1.78 kΩ 9.4 10.4 11.3 A

OC_LS_src2

Low-side sourcing current limit R

MODE

= 22.1 kΩ 6.2 7.4 8.5 A

OC_LS_snk

Low-side sinking current limit Current into SW pin 2.95 A

OUTPUT OVERVOLTAGE AND UNDERVOLTAGE PROTECTIONS

OVP

Overvoltage-protection (OVP) threshold

voltage

rising 120 % V

REF

www.ti.com.cn

TPS543820

ZHCSLZ3B – MAY 2020 – REVISED JUNE 2021

Submit Document Feedback

Product Folder Links: TPS543820

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