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  • TPS6217x-Q1 具有 DCS-Control™ 功能的 3V 到 17V 0.5A 降压转换器

    • ZHCSD50D December   2014  – February 2017 TPS62170-Q1 , TPS62171-Q1 , TPS62172-Q1

      PRODUCTION DATA.  

  • CONTENTS
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  • TPS6217x-Q1 具有 DCS-Control™ 功能的 3V 到 17V 0.5A 降压转换器
  1. 1 特性
  2. 2 应用
  3. 3 说明
  4. 4 修订历史记录
  5. 5 Device Comparison Table
  6. 6 Pin Configuration and Functions
  7. 7 Specifications
    1. 7.1 Absolute Maximum Ratings
    2. 7.2 ESD Ratings
    3. 7.3 Recommended Operating Conditions
    4. 7.4 Thermal Information
    5. 7.5 Electrical Characteristics
    6. 7.6 Typical Characteristics
  8. 8 Detailed Description
    1. 8.1 Overview
    2. 8.2 Functional Block Diagram
    3. 8.3 Feature Description
      1. 8.3.1 Enable / Shutdown (EN)
      2. 8.3.2 Softstart
      3. 8.3.3 Power Good (PG)
      4. 8.3.4 Under Voltage Lockout (UVLO)
      5. 8.3.5 Thermal Shutdown
    4. 8.4 Device Functional Modes
      1. 8.4.1 Pulse Width Modulation (PWM) Operation
      2. 8.4.2 Power Save Mode Operation
      3. 8.4.3 100% Duty-Cycle Operation
      4. 8.4.4 Current Limit and Short Circuit Protection
      5. 8.4.5 Operation Above TJ = 125°C
  9. 9 Application and Implementation
    1. 9.1 Application Information
    2. 9.2 Typical TPS62170-Q1 Application
      1. 9.2.1 Design Requirements
      2. 9.2.2 Detailed Design Procedure
        1. 9.2.2.1 Custom Design With WEBENCH® Tools
        2. 9.2.2.2 Programming the Output Voltage
        3. 9.2.2.3 External Component Selection
          1. 9.2.2.3.1 Inductor Selection
          2. 9.2.2.3.2 Capacitor Selection
            1. 9.2.2.3.2.1 Output Capacitor
            2. 9.2.2.3.2.2 Input Capacitor
        4. 9.2.2.4 Output Filter and Loop Stability
      3. 9.2.3 Application Performance Plots
    3. 9.3 System Examples
      1. 9.3.1 Inverting Power Supply
      2. 9.3.2 Various Output Voltages
  10. 10Power Supply Recommendations
  11. 11Layout
    1. 11.1 Layout Guidelines
    2. 11.2 Layout Example
    3. 11.3 Thermal Considerations
  12. 12器件和文档支持
    1. 12.1 器件支持
      1. 12.1.1 开发支持
        1. 12.1.1.1 使用 WEBENCH® 工具定制设计方案
      2. 12.1.2 Third-Party Products Disclaimer
    2. 12.2 文档支持
      1. 12.2.1 相关文档　
    3. 12.3 相关链接
    4. 12.4 商标
    5. 12.5 静电放电警告
    6. 12.6 接收文档更新通知
    7. 12.7 社区资源
    8. 12.8 Glossary
  13. 13机械、封装和可订购信息
  14. 重要声明
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DATA SHEET

TPS6217x-Q1 具有 DCS-Control™ 功能的 3V 到 17V 0.5A 降压转换器

本资源的原文使用英文撰写。 为方便起见，TI 提供了译文；由于翻译过程中可能使用了自动化工具，TI 不保证译文的准确性。 为确认准确性，请务必访问 ti.com 参考最新的英文版本（控制文档）。

1 特性

  • DCS-Control™拓扑
  • 适用于汽车电子 应用
  • 具有符合 AEC-Q100 标准的下列结果：
    • 器件温度等级：-40°C 至 125°C 的运行结温范围
    • 器件人体放电模式 (HBM) 静电放电 (ESD) 分类等级 H2
    • 器件组件充电模式 (CDM) ESD 分类等级 C4B
  • 输入电压范围：3V 至 17V
  • 输出电流高达 500mA
  • 可调输出电压范围为 0.9V 至 6V
  • 固定输出电压版本
  • 无缝省电模式转换
  • 静态电流典型值为 17µA
  • 电源正常输出
  • 100% 占空比模式
  • 短路保护
  • 过热保护
  • 与 TPS62160-Q1 引脚对引脚兼容
  • 采用 2 × 2mm WSON-8 封装
  • 借助 WEBENCH® 电源设计器并使用 TPS62170-Q1 创建定制设计方案

2 应用

  • 汽车类 12V 导轨式电源
  • 同轴电缆供电 POL 电源
  • 摄像机模块、视频模块
  • 低压降稳压器 (LDO)

3 说明

TPS6217x-Q1 系列是一款简单易用的同步降压直流/直流转换器，针对 高功率密度的应用 进行了优化。该器件的开关频率典型值高达 2.25MHz，允许使用小型电感，利用 DCS-Control™ 拓扑技术提供快速瞬态响应并实现高输出电压精度。

此器件具有 3V 至 17V 宽运行输入电压范围，非常适用于由锂离子或其它电池以及 12V 中间电源轨供电的系统。其输出电压为 0.9V 至 6V，支持高达 0.5A 的持续输出电流（使用 100% 占空比模式）。

通过配置使能引脚和开漏电源正常状态引脚也可以实现电源排序。

在节能模式下，器件可根据输入电压 (VIN) 生成约 17μA 的静态电流。负载较小时可自动且无缝进入节能模式，同时该模式可保持整个负载范围内的高效率。在关断模式下，此器件会关闭且关断期间的流耗少于 2μA。

此器件分为可调和固定输出电压型号，采用 2mm × 2mm (DSG) 8 引脚 WSON 封装。

器件信息(1)

器件型号 封装 封装尺寸（标称值）
TPS62170-Q1 WSON (8) 2.00mm x 2.00mm
TPS62171-Q1 WSON (8) 2.00mm x 2.00mm
TPS62172-Q1 WSON (8) 2.00mm x 2.00mm
  1. 要了解所有可用封装，请见数据表末尾的可订购产品附录。

典型应用电路原理图

效率与输出电流间的关系

空白

空白空白
TPS62170-Q1 TPS62171-Q1 TPS62172-Q1 SLVSCK7_typapp.gif
TPS62170-Q1 TPS62171-Q1 TPS62172-Q1 SLVSCK7_eff_lin.gif

4 修订历史记录

Changes from C Revision (November 2016) to D Revision

  • Added WEBENCH® 信息Go
  • Changed TJ spec MAX value From 125°C To 150°C in the Absolute Maximum Ratings tableGo

Changes from B Revision (October 2016) to C Revision

  • Added 引脚对引脚兼容特性Go
  • Changed Thermal Information tableGo
  • Added C1, C2, R1, R2, descriptors to Figure 5Go
  • Added C1, C2 to Table 1 Go

Changes from A Revision (September 2016) to B Revision

  • Added the Device Comparison TableGo

Changes from * Revision (December 2014) to A Revision

  • 在应用列表中将“同轴以太网供电 POL 电源”更改为“同轴电缆供电 POL 电源”Go
  • Added 数据表中增加了 TPS62171-Q1 器件。Go
  • Changed Unit from mA to V for Pin voltage at FB, PG, and VOS in the Absolute Maximum Ratings table. Go
  • Changed Unit from °C to mA in the Absolute Maximum Ratings table for Power Good sink current. Go
  • Changed Unit from kV to °C in the Absolute Maximum Ratings table for the Operating junction temperature, TJ Go
  • Added legal NOTE at Application and Implementation Go
  • Added cross references to Third-Party Products disclaimer in Table 1Go

5 Device Comparison Table

PART NUMBER(1) OUTPUT VOLTAGE
TPS62170-Q1 adjustable
TPS62171-Q1 1.8 V
TPS62172-Q1 3.3 V
(1) For detailed ordering information please check the 机械、封装和可订购信息 section at the end of this datasheet.

6 Pin Configuration and Functions

8-Pin WSON
DSG Package
(Top View)
TPS62170-Q1 TPS62171-Q1 TPS62172-Q1 SLVSCK7_pinout.gif

space

Pin Functions

PIN(1) I/O DESCRIPTION
NAME NUMBER
PGND 1 Power ground
VIN 2 I Supply voltage
EN 3 I Enable input (High = enabled, Low = disabled)
AGND 4 Analog ground
FB 5 I Voltage feedback of adjustable version. Connect resistive voltage divider to this pin. It is recommended to connect FB to AGND on fixed output voltage versions for improved thermal performance.
VOS 6 I Output voltage sense pin and connection for the control loop circuitry.
SW 7 O Switch node, which is connected to the internal MOSFET switches. Connect inductor between SW and output capacitor.
PG 8 O Output power good (High = VOUT ready, Low = VOUT below nominal regulation) ; open drain (requires pull-up resistor; goes high impedance, when device is switched off)
Exposed Thermal Pad Must be connected to AGND. Must be soldered to achieve appropriate power dissipation and mechanical reliability.
(1) For more information about connecting pins, see Detailed Description and Application and Implementation sections.

7 Specifications

7.1 Absolute Maximum Ratings

over operating junction temperature range (unless otherwise noted) (1)
MIN MAX UNIT
Pin voltage(2) VIN –0.3 20 V
EN –0.3 VIN+0.3
SW -0.3 VIN+0.3 V
FB, PG, VOS –0.3 7 V
Power Good sink current PG 10 mA
Operating junction temperature range, TJ –40 150 °C
Storage temperature range, Tstg –65 150 °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.
(2) All voltages are with respect to network ground terminal.

7.2 ESD Ratings

VALUE UNIT
V(ESD) Electrostatic discharge Human body model (HBM), per AEC Q100-002(1) ±2000 V
Charged device model (CDM), per AEC Q100-011 ±500
(1) AEC Q100-002 indicates HBM stressing is done in accordance with the ANSI/ESDA/JEDEC JS-001 specification.

7.3 Recommended Operating Conditions

over operating junction temperature range (unless otherwise noted)
MIN TYP MAX UNIT
VIN Supply voltage 3 17 V
VOUT Output voltage range 0.9 6 V
TJ Operating junction temperature –40 125 °C

7.4 Thermal Information

THERMAL METRIC(1) TPS6217x-Q1 UNIT
DSG (8 PINS)
RθJA Junction-to-ambient thermal resistance 65.5 °C/W
RθJC(top) Junction-to-case (top) thermal resistance 66.4 °C/W
RθJB Junction-to-board thermal resistance 35.5 °C/W
ψJT Junction-to-top characterization parameter 1.7 °C/W
ψJB Junction-to-board characterization parameter 35.8 °C/W
RθJC(bot) Junction-to-case (bottom) thermal resistance 8.4 °C/W
(1) For more information about traditional and new thermal metrics, see the Semiconductor and IC Package Thermal Metrics application report, .

7.5 Electrical Characteristics

over junction temperature range (TJ = –40°C to +125°C), typical values at VIN = 12 V and TJ = 25°C (unless otherwise noted)
PARAMETER TEST CONDITIONS MIN TYP MAX UNIT
SUPPLY
VIN Input voltage range(1) 3 17 V
IQ Operating quiescent current EN = High, IOUT = 0 mA, Device not switching 17 30 µA
ISD Shutdown current(2) EN = Low 1.8 25 µA
VUVLO Undervoltage lockout threshold Falling input voltage 2.6 2.7 2.82 V
Hysteresis 180 mV
TSD Thermal shutdown temperature 160 °C
Thermal shutdown hysteresis 20
CONTROL (EN, PG)
VEN_H High-level input threshold voltage (EN) 0.9 V
VEN_L Low-level input threshold voltage (EN) 0.3 V
ILKG_EN Input leakage current (EN) EN = VIN or GND 0.01 1 µA
VTH_PG Power Good threshold voltage Rising (%VOUT) 92% 95% 98%
Falling (%VOUT) 87% 90% 93%
VOL_PG Power Good output low IPG = –2 mA 0.07 0.3 V
ILKG_PG Input leakage current (PG) VPG = 1.8 V 1 400 nA
POWER SWITCH
RDS(ON) High-side MOSFET ON-resistance VIN ≥ 6 V 300 600 mΩ
VIN = 3 V 430
Low-side MOSFET ON-resistance VIN ≥ 6 V 120 200 mΩ
VIN = 3 V 165
ILIMF High-side MOSFET forward current limit(3) VIN = 12 V, TA = 25°C 0.85 1.05 1.35 A
OUTPUT
VREF Internal reference voltage 0.8 V
ILKG_FB Pin leakage current (FB) TPS62170-Q1, VFB = 1.2 V 5 400 nA
VOUT Output voltage range TPS62170-Q1, VIN ≥ VOUT 0.9 6.0 V
Feedback voltage accuracy(4) PWM Mode operation, VIN ≥ VOUT + 1 V –3% 3%
Power Save Mode operation, COUT = 22 µF(5) –3.5% 4%
DC output voltage load regulation(6) VIN = 12 V, VOUT = 3.3 V, PWM Mode operation 0.05 % / A
DC output voltage line regulation (6) 3 V ≤ VIN ≤ 17 V, VOUT = 3.3 V, IOUT = 0.5 A,
PWM Mode operation 		0.02 % / V
(1) The device is still functional down to Under Voltage Lockout (see parameter VUVLO).
(2) Current into VIN pin.
(3) This is the static current limit. It can be temporarily higher in applications due to internal propagation delay (see Current Limit and Short Circuit Protection).
(4) For fixed voltage versions, the (internal) resistive feedback divider is included.
(5) The accuracy in Power Save Mode can be improved by increasing the COUT value, reducing the output voltage ripple.
(6) Line and load regulation are depending on external component selection and layout (see Figure 14 and Figure 15).

7.6 Typical Characteristics

At VIN = 12 V, VOUT = 3.3 V and TJ = 25°C (unless otherwise noted)
TPS62170-Q1 TPS62171-Q1 TPS62172-Q1 SLVSCK6_IQ.gif
Figure 1. Quiescent Current
TPS62170-Q1 TPS62171-Q1 TPS62172-Q1 SLVSCK6_RDSonHS.gif
Figure 3. High-Side Static Drain-Source-Resistance (RDSon)
TPS62170-Q1 TPS62171-Q1 TPS62172-Q1 SLVSCK6_ISD.gif
Figure 2. Shutdown Current
TPS62170-Q1 TPS62171-Q1 TPS62172-Q1 SLVSCK6_RDSonLS.gif
Figure 4. Low-Side Static Drain-Source-Resistance (RDSon)

 
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