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AC/DC 和 DC/DC 轉換器 (整合式 FET)

TPS54A20

現行

小型、10-MHz、8-V 至 14-V、10-A 同步 SWIFT™ 串聯電容降壓轉換器

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最新 TPS543A22 現行 4-V 至 18-V 輸入、進階電流模式、12-A 同步 SWIFT™ 降壓轉換器 Fixed frequency converter with smaller solution size and higher efficiency

TPS54A20

現行
產品規格表 立即訂購

產品詳細資料

Rating Catalog Operating temperature range (°C) -40 to 125 Topology Buck Type Converter Iout (max) (A) 10 Vin (min) (V) 8 Vin (max) (V) 14 Switching frequency (min) (kHz) 4000 Switching frequency (max) (kHz) 10000 Features Adjustable current limit, Enable, Frequency synchronization, Phase Interleaving, Power good, Pre-Bias Start-Up, Synchronous Rectification, UVLO adjustable Control mode Constant on-time (COT) Vout (min) (V) 0.5 Vout (max) (V) 2 Iq (typ) (A) 0.005
Rating Catalog Operating temperature range (°C) -40 to 125 Topology Buck Type Converter Iout (max) (A) 10 Vin (min) (V) 8 Vin (max) (V) 14 Switching frequency (min) (kHz) 4000 Switching frequency (max) (kHz) 10000 Features Adjustable current limit, Enable, Frequency synchronization, Phase Interleaving, Power good, Pre-Bias Start-Up, Synchronous Rectification, UVLO adjustable Control mode Constant on-time (COT) Vout (min) (V) 0.5 Vout (max) (V) 2 Iq (typ) (A) 0.005
VQFN-HR (RNJ) 20 14 mm² 4 x 3.5
  • Two-phase, Synchronous Series Capacitor Buck
    Converter
  • Automatic Current Balancing Between Phases
  • 2-MHz to 5-MHz Per Phase Switching Frequency
  • 14-ns Minimum On-Time
  • 0.51-V to 2-V Output Voltage Range with ±0.5%
    Feedback Reference Voltage
  • Input Overvoltage Lockout for 17-V Surge
    Protection
  • Adjustable Current Limit with Auto Restart
    (Hiccup)
  • Synchronizes to an External Clock
  • Fixed Frequency in Steady State
  • Adaptive On-Time Control
  • Internal Feedback Loop Compensation
  • Internal Gate Drive LDO with External Supply
    Option
  • EN Pin Allowing for Adjustable Input UVLO
  • Selectable Soft-Start Time
  • Monotonic Startup with Pre-biased Output
  • Output Power Good Indicator (Open Drain)
  • Output Overvoltage/Undervoltage Protection
  • Two-phase, Synchronous Series Capacitor Buck
    Converter
  • Automatic Current Balancing Between Phases
  • 2-MHz to 5-MHz Per Phase Switching Frequency
  • 14-ns Minimum On-Time
  • 0.51-V to 2-V Output Voltage Range with ±0.5%
    Feedback Reference Voltage
  • Input Overvoltage Lockout for 17-V Surge
    Protection
  • Adjustable Current Limit with Auto Restart
    (Hiccup)
  • Synchronizes to an External Clock
  • Fixed Frequency in Steady State
  • Adaptive On-Time Control
  • Internal Feedback Loop Compensation
  • Internal Gate Drive LDO with External Supply
    Option
  • EN Pin Allowing for Adjustable Input UVLO
  • Selectable Soft-Start Time
  • Monotonic Startup with Pre-biased Output
  • Output Power Good Indicator (Open Drain)
  • Output Overvoltage/Undervoltage Protection

The TPS54A20 is a two-phase, synchronous series capacitor buck converter designed for small size, low voltage applications from a 12-V input rail. This topology uniquely merges a switched capacitor circuit with a two phase buck converter. Advantages include automatic current balancing between the inductors, lower switching losses which enable high frequency (HF) operation, and voltage step-down through the series capacitor. Small, low profile inductors used with the TPS54A20 significantly reduce total solution area and height. An adaptive on-time control architecture provides fast transient response and accurate voltage regulation at up to 10-MHz operating frequency. Fixed frequency operation during steady state is maintained through the use of a phase lock loop (PLL) to lock switching signals to a reference oscillator.

The TPS54A20 is a two-phase, synchronous series capacitor buck converter designed for small size, low voltage applications from a 12-V input rail. This topology uniquely merges a switched capacitor circuit with a two phase buck converter. Advantages include automatic current balancing between the inductors, lower switching losses which enable high frequency (HF) operation, and voltage step-down through the series capacitor. Small, low profile inductors used with the TPS54A20 significantly reduce total solution area and height. An adaptive on-time control architecture provides fast transient response and accurate voltage regulation at up to 10-MHz operating frequency. Fixed frequency operation during steady state is maintained through the use of a phase lock loop (PLL) to lock switching signals to a reference oscillator.
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類型 標題 日期
* Data sheet TPS54A20 8-V to 14-V Input, 10-A, up to 10-MHz SWIFT Step Down Converter datasheet (Rev. A) PDF | HTML 2016年 4月 7日
Analog Design Journal Control-Mode Quick Reference Guide (Rev. B) PDF | HTML 2023年 8月 29日
EVM User's guide TPS54A20 SWIFT™ Step-Down Converter Evaluation Module User's Guide (Rev. B) PDF | HTML 2021年 8月 3日
Selection guide Buck Converter Quick Reference Guide (Rev. B) 2021年 4月 8日
Analog Design Journal Using a high‐freq. switching regulator w/o a linear reg. to power a data‐convert 2018年 9月 24日
More literature Common Mistakes in DC/DC Converters and How to Fix Them 2018年 2月 14日
More literature Design of Multi-MHz Series Capacitor Buck Converters Used As Voltage Regulators 2018年 1月 31日
Analog Design Journal Saving board space with a low-profile series-capacitor buck converter 2016年 10月 24日
More literature Design of a high-frequency series capacitor buck converter 2016年 8月 17日
Application note Introduction to the Series Capacitor Buck Converter (Rev. A) 2016年 5月 24日
Technical article No small matter: How to reduce voltage regulator size PDF | HTML 2016年 5月 23日
White paper Breakthrough power delivery for space-constrained applications 2016年 5月 13日

設計與開發

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開發板

TPS54A20EVM-770 — TPS54A20 同步降壓轉換器評估模組

TPS54A20EVM-770 is a 10 A synchronous dual phase converter evaluation module (EVM).  The EVM generates a 1.2 V output voltage froma a nominal 12 V input.  The input voltage range is 9.2 V to 14 V with a minimum start up voltage of 9.4 V.  The circuit is set upfor default operation of (...)

使用指南: PDF | HTML
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模擬型號

TPS54A20 PSpice Transient Model

SLVMBF2.ZIP (583 KB) - PSpice Model
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參考設計

PMP11438 — 將 12V 轉換為 1.2V (負載電流大於 6A) 的三種不同降壓轉換器電路參考設計

PMP11438 is a vehicle used to compare three different power solutions for converting a 12V bus to 1.2V at 6-10A. The 1.2V output voltage is applicable to DDR4 memory applications. Each solution offers an advantage in either full load efficiency, light load efficiency, density, height, transient (...)
Test report: PDF
電路圖: PDF
參考設計

PMP15008 — 微型低高度 10A 負載點電壓穩壓器參考設計

The PMP15008 reference design is a small, high frequency point-of-load voltage regulator. A unique converter topology enables high efficiency while operating at 2 MHz per phase. This design is targeted at applications like processor or memory power with an 8 V to 14 V input and 0.5 V to 2 V, (...)
Test report: PDF
電路圖: PDF
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