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  • TPS6305x 开关电流为 1A、具备可调节软启动功能的单电感降压-升压转换器

    • ZHCSBD3D July   2013  – August 2019 TPS63050 , TPS63051

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  • TPS6305x 开关电流为 1A、具备可调节软启动功能的单电感降压-升压转换器
  1. 1 特性
  2. 2 应用
  3. 3 说明
    1.     Device Images
      1.      简化原理图 (WCSP)
      2.      效率与输出电流间的关系
  4. 4 修订历史记录
  5. 5 Device Comparison Table
  6. 6 Pin Configuration and Functions
    1.     Pin 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 Switching Characteristics
    7. 7.7 Typical Characteristics
  8. 8 Detailed Description
    1. 8.1 Overview
    2. 8.2 Functional Block Diagrams
    3. 8.3 Feature Description
      1. 8.3.1 Power Good
      2. 8.3.2 Overvoltage Protection
      3. 8.3.3 Undervoltage Lockout (UVLO)
      4. 8.3.4 Thermal Shutdown
      5. 8.3.5 Soft Start
      6. 8.3.6 Short Circuit Protection
    4. 8.4 Device Functional Modes
      1. 8.4.1 Control Loop Description
      2. 8.4.2 Power Save Mode Operation
      3. 8.4.3 Adjustable Current Limit
      4. 8.4.4 Device Enable
  9. 9 Application and Implementation
    1. 9.1 Application Information
    2. 9.2 Typical 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 Output Filter Design
        3. 9.2.2.3 Inductor Selection
        4. 9.2.2.4 Capacitor selection
          1. 9.2.2.4.1 Input Capacitor
          2. 9.2.2.4.2 Output Capacitor
        5. 9.2.2.5 Setting the Output Voltage
      3. 9.2.3 Application Curves
  10. 10Power Supply Recommendations
  11. 11Layout
    1. 11.1 Layout Guidelines
    2. 11.2 Layout Example (WCSP)
    3. 11.3 Layout Example (HotRod)
    4. 11.4 Thermal Considerations
  12. 12器件和文档支持
    1. 12.1 使用 WEBENCH® 工具创建定制设计
    2. 12.2 器件支持
      1. 12.2.1 第三方产品免责声明
    3. 12.3 相关链接
    4. 12.4 接收文档更新通知
    5. 12.5 社区资源
    6. 12.6 商标
    7. 12.7 静电放电警告
    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

TPS6305x 开关电流为 1A、具备可调节软启动功能的单电感降压-升压转换器

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

  • 实时降压或升压，支持在降压和升压模式之间无缝转换
  • 输入电压范围为 2.5V 至 5.5V
  • 0.5A 持续输出电流：VIN ≥ 2.5V、
    VOUT = 3.3V
  • 具有可调节输出电压和固定输出电压两个版本可选
  • 在升压模式中效率大于 90%，在降压模式中效率大于 95%
  • 开关频率典型值为 2.5MHz
  • 平均输入电流限制可调节
  • 软启动时间可调节
  • 器件静态电流小于 60μA
  • 具有自动节电模式或强制 PWM 模式
  • 关断期间负载断开
  • 提供过热保护
  • 采用 1.6mm x 1.2mm、12 引脚 WCSP 小型封装和 2.5mm x 2.5mm、12 引脚、HotRod™ QFN 封装
  • 借助以下工具创建定制设计方案：
    • TPS63050，使用 WEBENCH® 电源设计器
    • TPS63051，使用 WEBENCH® 电源设计器

2 应用

  • 手机和智能电话
  • 平板电脑
  • PC 和智能手机附件
  • 通过电池供电的 应用
  • 智能电网/智能仪表

3 说明

TPS6305x 系列器件是一款静态电流较低的高效降压/升压转换器 ， 适用于输入电压高于或低于输出电压的应用。

在升压模式下，持续输出电流最高可达 500mA；在降压模式下，持续输出最高可达 1A。最大平均开关电流限制为 1A（典型值）。TPS6305x 系列器件在整个输入电压范围内针对输出电压进行稳压操作，可根据输入电压自动切换为降压或升压模式，从而在两种模式之间实现无缝转换。

该降压/升压转换器基于使用同步整流的固定频率 PWM 控制器，可实现最高效率。在负载电流较低的情况下，该转换器进入节能模式，从而在整个负载电流范围内保持高效率。

用户可以通过脉频调制 (PFM)/PWM 引脚选择自动 PFM/PWM 工作模式或强制 PWM 工作模式。在 PWM 模式下通常使用 2.5MHz 固定频率。使用一个外部电阻分压器可对输出电压进行编程，或者在芯片上对输出电压进行内部固定。转换器可被禁用以最大限度地减少电池消耗。在关断期间，负载从电池上断开。该器件采用 12 引脚芯片尺寸球状引脚栅格阵列 (DSBGA) 封装和 12 引脚 HotRod 封装。

器件信息(1)

器件型号 封装 封装尺寸（标称值）
TPS63050
TPS63051		 DSBGA (12) 1.56mm x 1.16mm
VQFN (12) 2.50mm x 2.50mm
  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。

Device Images

简化原理图 (WCSP)

TPS63050 TPS63051 fp_schematic2_TPS63050_SLVSAM8.gif

效率与输出电流间的关系

TPS63050 TPS63051 Backup_of_Backup_of_Figure8rev1.gif

4 修订历史记录

Changes from C Revision (July 2015) to D Revision

  • 在数据表中添加了 Webench 链接Go
  • Changed the Pin ConfigurationsGo
  • Changed the quiescent current VIN max value From: 60 µA To: 65 µA in the Electrical CharacteristicsGo
  • Added Note: Conditions: TJ = –40°C to 85°C To the quiescent current and shutdown current in the Electrical CharacteristicsGo

Changes from B Revision (April 2015) to C Revision

  • Added 新封装选项至 项目符号Go
  • Added VQFN 封装至器件信息表Go
  • Added HotRod Pin Configuration and Functions Go
  • Added Parameter Measurement Circuit for HotRod package optionGo

Changes from A Revision (February 2014) to B Revision

  • Changed 说明 部分的第四段 Go
  • Changed 图形图像 Go
  • Changed Ordering Information table To:Device Comparison TableGo
  • Changed "Handling Ratings" table to "ESD Rating" table and moved Tstg spec to the Absolute Maximum Ratings tableGo
  • Moved some Typical Characteristics graphs to the Application Curves section Go

Changes from * Revision (July 2013) to A Revision

  • Added 器件信息表，ESD 额定值表，特性 描述部分，器件功能模式，应用和实施部分，电源相关建议部分，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Go
  • Added TPS63050 器件规范和 说明 至整篇数据手册Go
  • Changed Figure 34, PCB Layout Go
  • Changed Figure 35, PCB Layout Go

5 Device Comparison Table

PART NUMBER (1) VOUT
TPS63050 Adjustable
TPS63051 3.3 V
(1) For all available packages, see the orderable addendum at the end of the datasheet

6 Pin Configuration and Functions

YFF Package
12-Pin DSBGA
Top View
RMW Package
12-Pin HotRod
Top View
TPS63050 TPS63051 RMW_qfn_pin_diagram.gif

Pin Functions

PIN I/O DESCRIPTION
NAME WCSP HotRod
EN A3 11 I Enable input. (1 enabled, 0 disabled). It must not be left floating
FB D2 5 I Voltage feedback of adjustable versions, must be connected to VOUT on fixed output voltage versions1
GND B1 2,9 Ground for Power stage and Control stage
ILIM0 B2 10 I Programmable inrush current limit input works together with lLIM1. See table on page 1.
It must not be left floating
ILIM1 B3 See (1) I Programmable inrush current limit input works together with lLIM0.
See 效率与输出电流间的关系 on page 1. Do not leave floating
L1 A1 1 Connection for Inductor
L2 C1 3 Connection for Inductor
PFM/PWM C2 6 I 0 for PFM mode 1 for forced PWM mode. It must not be left floating
PG C3 8 O Power good open drain output
SS D3 7 I Adjustable Soft-Start. If left floating default soft-start time is set
VIN A2 12 I Supply voltage for power stage and control stage
VOUT D1 4 O Buck-boost converter output
(1) Only available with DSBGA package, for VQFN package ILIM1 is internally connected to voltage level > VIH

7 Specifications

7.1 Absolute Maximum Ratings

over junction temperature range (unless otherwise noted) (4)
MIN MAX UNIT
Voltage(1) VIN, L1, EN, VOUT, FB, VINA, PFM/PWM –0.3 7 V
L2(2) –0.3 7
L2(3) –0.3 9.5
Operating junction temperature, TJ –40 150 °C
Operating ambient temperature, TA –40 85 °C
Storage temperature, Tstg –65 150 °C
(1) All voltage values are with respect to network ground pin.
(2) DC voltage rating.
(3) AC voltage rating.
(4) 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.

7.2 ESD Ratings

VALUE UNIT
V(ESD) Electrostatic discharge Human-body model (HBM), per ANSI/ESDA/JEDEC JS-001(1) ±1500 V
Charged-device model (CDM), per JEDEC specification JESD22-C101(2) ±700
(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.

7.3 Recommended Operating Conditions

See (1) MIN NOM MAX UNIT
VIN Input voltage 2.5 5.5 V
IOUT Output current 0.5 A
L Inductance(3) 1 1.5 2.2 µH
COUT Output capacitance(2) 10 µF
TA Operating ambient temperature –40 85 °C
TJ Operating virtual junction temperature –40 125 °C
(1) Refer to the Application Information section for further information
(2) Due to the DC bias effect of ceramic capacitors, the effective capacitance is lower then the nominal value when a voltage is applied. This is why the capacitance is specified to allow the selection of the nominal capacitor required with the DC bias effect for this type of capacitor. The nominal value given matches a typical capacitor to be chosen to meet the minimum capacitance required.
(3) Effective inductance value at operating condition. The nominal value given matches a typical inductor to be chosen to meet the inductance required.

7.4 Thermal Information

THERMAL METRIC(1) TPS6305x UNIT
WCSP RMW
12 PINS 12 PINS
RθJA Junction-to-ambient thermal resistance 89.9 37.3 °C/W
RθJC(top) Junction-to-case (top) thermal resistance 0.7 30.4 °C/W
RθJB Junction-to-board thermal resistance 43.9 8.0 °C/W
ψJT Junction-to-top characterization parameter 2.9 0.4 °C/W
ψJB Junction-to-board characterization parameter 43.7 7.8 °C/W
RθJC(bot) Junction-to-case (bottom) thermal resistance n/a 2.5 °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

VIN = 3.6 V, TJ = –40°C to 125°C, typical values are at TA = 25°C (unless otherwise noted)
PARAMETER TEST CONDITIONS MIN TYP MAX UNIT
SUPPLY
VIN Input voltage range 2.5 5.5 V
VIN_Min Minimum input voltage to turn on in full load IOUT = 500 mA 2.7 V
IOUT Output current(3) ILIM0 = VIH, ILIM1 = VIH, 500 mA
IQ Quiescent current (2) VIN IOUT = 0 mA, EN = VIN = 3.6 V,
VOUT = 3.3 V		 43 65 μA
VOUT IOUT = 0 mA, EN = VIN = 3.6 V,
VOUT = 3.3 V		 10
Isd Shutdown current (2) EN = 0 V 0.1 1 μA
UVLOTH Undervoltage lockout threshold VIN falling 1.6 1.7 1.8 V
UVLOhys Undervoltage lockout hysteresis 200 mV
TSD Thermal shutdown Temperature rising 140 °C
TSD(hys) Thermal shutdown hysteresis 20 °C
LOGIC SIGNALS EN, ILIM0, ILIM1
VIH High level input voltage VIN = 2.5 V to 5.5 V 1.2 V
VIL Low level voltage Input Voltage VIN = 2.5 V to 5.5 V 0.3 V
Ilkg Input leakage current PFM / PWM, EN, ILIM0, ILIM1 = GND or VIN 0.01 0.1 μA
POWER GOOD
VOL Low level voltage Isink = 100 μA 0.3 V
IPG PG sinking current V = 0.3 V 0.1 mA
Ilkg Input leakage current VPG = 3.6 V 0.01 0.1 μA
OUTPUT
VOUT Output voltage range 2.5 5.5 V
VFB TPS63050 feedback regulation voltage 0.8 V
VFB TPS63050 feedback voltage accuracy PWM mode –1.1% 1.1%
VFB TPS63050 feedback voltage accuracy(1) PFM mode –1% 3%
VOUT TPS63051 output voltage accuracy PWM mode 3.27 3.3 3.34 V
VOUT TPS63051 output voltage accuracy(1) PFM mode 3.27 3.3 3.39 V
IPWM->PFM Minimum output current to enter PFM mode VIN = 3 V; VOUT = 3.3 V 150 mA
IFB TPS63050 feedback input bias current VFB = 0.8 V 10 100 nA
RDS(on) Input high-side FET on-resistance ISW = 500 mA 145 mΩ
Output high-side FET on-resistance ISW = 500 mA 95 mΩ
Input low-side FET on-resistance ISW = 500 mA 170 mΩ
Output low-side FET on-resistance ISW = 500 mA 115 mΩ
IIN_MAX Input current-limit boost mode ILIM0 = VIH, ILIM1 = VIH,VIN = 2.7 V to 3 V, VOUT = 3 V 480 1240 mA
ILIM0 = VIH, ILIM1 = VIH,VIN = 2.7 V to 3.3 V, VOUT = 3.3 V, 550 1400 mA
ILIM0 = VIH, ILIM1 = VIH,VIN = 2.7 V to 4.5 V, VOUT = 4.5 V, 630 1950 mA
ISS_IN Programmable inrush current limit(4) ILIM0 = VIL, ILIM1 = VIL,
VIN = 3 V,VOUT = 3.3 V, (Available for DBGA only)		 0.4×IIN_MAX mA
ILIM0 = VIH, ILIM1 = VIL,
VIN = 3 V,VOUT = 3.3 V, (Available for DBGA only)		 0.5×IIN_MAX
ILIM0 = VIL, ILIM1 = VIH,
VIN = 3 V,VOUT = 3.3 V		 0.65×IIN_MAX
ILIM0 = VIH, ILIM1 = VIH,
VIN = 3 V,VOUT = 3.3 V		 IIN_MAX
ISS Soft-start current TPS63051 1 μA
ISS Soft-start current TPS63050 3.2 μA
Line regulation VIN = 2.5 V to 5.5 V, IOUT = 500 mA, PWM mode 0.963 mV/V
Load regulation VIN = 3.6 V, IOUT = 0 mA to 500 mA, PWM mode 4 mV/A
(1) Conditions: f = 2.5 MHz, L = 1.5 µH, COUT = 10 µF
(2) Conditions: TJ = –40°C to 85°C
(3) For minimum and maximum output current in a specific working point see Figure 1 and Figure 2; and Equation 1 through Equation 4.
(4) For variation of this parameter with Input voltage see Figure 3.

7.6 Switching Characteristics

VIN = 3.6 V, TJ = –40°C to 125°C, typical values are at TA = 25°C (unless otherwise noted)
PARAMETER TEST CONDITIONS MIN TYP MAX UNIT
OUTPUT
fs Switching frequency 2.5 MHz
tSS Softstart time VOUT = EN = low to high, SS = floating, Buck mode VIN = 3.6 V, VOUT = 3.3 V, IOUT = 500 mA(4) 280 µs
VOUT = EN = low to high, SS = floating, Boost mode VIN = 2.5 V, VOUT = 3.3 V, IOUT = 500 mA(4) 600
td Start up delay Time from when EN = high to when device starts switching 100 µs

7.7 Typical Characteristics

TPS63050 TPS63051 Figure3_SLVSAM8.gif
VOUT = 3.3 V
Figure 1. Maximum Average Input Current vs Input Voltage
TPS63050 TPS63051 Figure5_SLVSAM8.gif
Figure 3. Programmable Average Input Current vs Input Voltage(1)
TPS63050 TPS63051 Figure4_SLVSAM8.gif
VOUT = 3.3 V
Figure 2. Minimum Average Input Current vs Input Voltage
(1) All options only available with the DSBGA package. For VQFN package ILIM1 is internally connected to voltage level > VIH

8 Detailed Description

8.1 Overview

The TPS6305x devices use 4 internal N-channel MOSFETs to maintain synchronous power conversion at all possible operating conditions. This enables the device to keep high efficiency over the complete input voltage and output power range. To regulate the output voltage at all possible input voltage conditions, the device automatically switches from buck operation to boost operation and back as required by the configuration. It always uses one active switch, one rectifying switch, one switch held on, and one switch held off. Therefore, it operates as a buck converter when the input voltage is higher than the output voltage, and as a boost converter when the input voltage is lower than the output voltage. There is no mode of operation in which all 4 switches are switching at the same time. Keeping one switch on and one switch off eliminates their switching losses. The RMS current through the switches and the inductor is kept at a minimum, to minimize switching and conduction losses. Controlling the switches this way allows the converter to always keep higher efficiency.

The device provides a seamless transition from buck to boost or from boost to buck operation.

 
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