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DC/DC 轉換器

TPS628512

現行

採用 SOT583 封裝的 2.7-V 至 6-V、2-A、固定頻率降壓轉換器

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產品規格表

TPS628512

現行
產品規格表 立即訂購

產品詳細資料

Rating Catalog Topology Buck Iout (max) (A) 2 Vin (max) (V) 6 Vin (min) (V) 2.7 Vout (max) (V) 5.5 Vout (min) (V) 0.6 Features Adjustable soft start, Enable, Forced PWM, Frequency synchronization, Light load efficiency, Output discharge, Over Current Protection, Power good, Pre-Bias Start-Up, Soft Start Adjustable, Soft-start adjustable, Synchronous Rectification, Tracking, UVLO adjustable EMI features Spread Spectrum Control mode current mode Operating temperature range (°C) -40 to 150 Iq (typ) (A) 0.000017 Duty cycle (max) (%) 100 TI functional safety category Functional Safety-Capable Sector Test & measurement
Rating Catalog Topology Buck Iout (max) (A) 2 Vin (max) (V) 6 Vin (min) (V) 2.7 Vout (max) (V) 5.5 Vout (min) (V) 0.6 Features Adjustable soft start, Enable, Forced PWM, Frequency synchronization, Light load efficiency, Output discharge, Over Current Protection, Power good, Pre-Bias Start-Up, Soft Start Adjustable, Soft-start adjustable, Synchronous Rectification, Tracking, UVLO adjustable EMI features Spread Spectrum Control mode current mode Operating temperature range (°C) -40 to 150 Iq (typ) (A) 0.000017 Duty cycle (max) (%) 100 TI functional safety category Functional Safety-Capable Sector Test & measurement
SOT-5X3 (DRL) 8 3.36 mm² (2.1 mm × 1.6 mm)
  • Functional Safety-Capable
  • Input voltage range: 2.7 V to 6 V
  • Output voltage from 0.6 V to 5.5 V
  • 1% feedback voltage accuracy (full temperature range)
  • TJ = –40°C to +150°C
  • Family of 0.5-A, 1-A, 2-A (continuous), and 3-A (peak) devices
  • Switching frequency in PWM: 2.25 MHz
  • External synchronization from 1.8 MHz to 4 MHz
  • Forced PWM or PWM/PFM operation
  • Quiescent current: 17 µA (typical)
  • Adjustable soft start-up to 10 ms
  • Precise ENABLE input allows:
    • User-defined undervoltage lockout
    • Exact sequencing
  • 100% duty cycle mode
  • Active output discharge
  • Power-good output with window comparator
  • For device options with selectable compensation, see the TPS628501
  • Functional Safety-Capable
  • Input voltage range: 2.7 V to 6 V
  • Output voltage from 0.6 V to 5.5 V
  • 1% feedback voltage accuracy (full temperature range)
  • TJ = –40°C to +150°C
  • Family of 0.5-A, 1-A, 2-A (continuous), and 3-A (peak) devices
  • Switching frequency in PWM: 2.25 MHz
  • External synchronization from 1.8 MHz to 4 MHz
  • Forced PWM or PWM/PFM operation
  • Quiescent current: 17 µA (typical)
  • Adjustable soft start-up to 10 ms
  • Precise ENABLE input allows:
    • User-defined undervoltage lockout
    • Exact sequencing
  • 100% duty cycle mode
  • Active output discharge
  • Power-good output with window comparator
  • For device options with selectable compensation, see the TPS628501

The TPS62851x is a family of pin-to-pin 0.5-A, 1-A, 2-A (continuous), and 3-A (peak) high efficiency, easy-to-use, synchronous step-down DC/DC converters. They are based on a peak current mode control topology. Low resistive switches allow up to 2-A continuous output current and 3-A peak current. The switching frequency is internally fixed at 2.25 MHz and can also be synchronized to an external clock in the range from 1.8 MHz to 4 MHz. In PWM/PFM mode, the TPS62851x automatically enters power save mode at light loads to maintain high efficiency across the whole load range. The TPS62851x provide a 1% output voltage accuracy in PWM mode, which helps design a power supply with high output voltage accuracy. The SS/TR pin allows setting the start-up time or tracking the output voltage to an external source, which allows external sequencing of different supply rails and limits the inrush current during start-up.

The TPS62851x is available in an 8-pin 1.60-mm × 2.10-mm SOT583 package, offering a high power density solution.

The TPS62851x is a family of pin-to-pin 0.5-A, 1-A, 2-A (continuous), and 3-A (peak) high efficiency, easy-to-use, synchronous step-down DC/DC converters. They are based on a peak current mode control topology. Low resistive switches allow up to 2-A continuous output current and 3-A peak current. The switching frequency is internally fixed at 2.25 MHz and can also be synchronized to an external clock in the range from 1.8 MHz to 4 MHz. In PWM/PFM mode, the TPS62851x automatically enters power save mode at light loads to maintain high efficiency across the whole load range. The TPS62851x provide a 1% output voltage accuracy in PWM mode, which helps design a power supply with high output voltage accuracy. The SS/TR pin allows setting the start-up time or tracking the output voltage to an external source, which allows external sequencing of different supply rails and limits the inrush current during start-up.

The TPS62851x is available in an 8-pin 1.60-mm × 2.10-mm SOT583 package, offering a high power density solution.
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功能相同，但針腳輸出與所比較的裝置不同。
TPS628502 現行 採用 SOT583 封裝的 2.7-V 至 6-V、2-A、可調整頻率降壓轉換器 Device with adjustable switching frequency and compensation of the control loop.
功能相似於所比較的產品。
TPSM828512 現行 採用 QFN 封裝，且具整合式電感器的 2.7-V 至 6-V、2-A 低雜訊降壓模組 Module with integrated inductor

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重要文件 類型 標題 格式選項 下載最新的英文版本 日期
* 資料表 TPS62851x 2.7-V to 6-V, 0.5-A, 1-A, 2-A, and 3-A Step-Down Converters in a SOT583 Package datasheet (Rev. B) PDF | HTML 2022/6/9
應用說明 Loop Gain Reconstruction of a Step-Down Converter from Output Impedance PDF | HTML 2022/1/20
應用說明 How to Measure Impedance of a Power Distribution Network of a DC-DC Converter PDF | HTML 2022/1/20
應用說明 Improving Efficiency at Higher Loads with High Switching Frequencies PDF | HTML 2021/6/16
功能安全資訊 TPS62851x Functional Safety, FIT Rate, Failure Mode Distribution and Pin FMA PDF | HTML 2021/3/24
證書 TPS628512EVM-139 EU Declaration of Conformity (DoC) 2020/7/27

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開發板

TPS628512EVM-139 — 採用 SOT583 封裝評估板的 2.7-V 至 6-V、2-A 降壓轉換器

TPS628512EVM-139 評估模組 (EVM) 可用於評估 TPS62851x 裝置。TPS62851x 裝置是一款針對小型解決方案尺寸和高效率進行最佳化的高頻同步降壓轉換器。此裝置著重在廣泛輸出電流範圍下提供高效率降壓轉換。在中到高負載下，轉換器會以 PWM 模式運作，並在低負載時自動進入省電模式運作，以在整個負載電流範圍內維持高效率。  此裝置採用 SOT583 封裝，包含接腳在內的尺寸為 2.1 mm × 1.6 mm。
使用指南: PDF | HTML
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TPS628512 PSpice Unencrypted Transient Model Package (Rev. A)

SLUM806A.ZIP (132 KB) - PSpice 模型
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