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AC/DC 和 DC/DC 轉換器 (整合式 FET)

TPS628511

現行

採用 SOT583 封裝的 2.7-V 至 6-V、1-A、固定頻率降壓轉換器

立即訂購
產品規格表

TPS628511

現行
產品規格表 立即訂購

產品詳細資料

Rating Catalog Topology Buck Iout (max) (A) 1 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 Switching frequency (min) (kHz) 2025 Switching frequency (max) (kHz) 2475 TI functional safety category Functional Safety-Capable Operating temperature range (°C) -40 to 150 Iq (typ) (µA) 17 Duty cycle (max) (%) 100 Type Converter
Rating Catalog Topology Buck Iout (max) (A) 1 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 Switching frequency (min) (kHz) 2025 Switching frequency (max) (kHz) 2475 TI functional safety category Functional Safety-Capable Operating temperature range (°C) -40 to 150 Iq (typ) (µA) 17 Duty cycle (max) (%) 100 Type Converter
SOT-5X3 (DRL) 8 3.36 mm² 2.1 x 1.6
  • 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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TPS628501 現行 採用 SOT-583 封裝的 2.7V 至 6V、1A 可調整頻率降壓轉換器 Device with adjustable switching frequency and compensation of the control loop.

技術文件

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類型 標題 日期
* Data sheet 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年 6月 9日
Application note How to Measure Impedance of a Power Distribution Network of a DC-DC Converter PDF | HTML 2022年 1月 20日
Application note Loop Gain Reconstruction of a Step-Down Converter from Output Impedance PDF | HTML 2022年 1月 20日
User guide TPS62851xEVM-139 Evaluation Module (Rev. A) PDF | HTML 2021年 6月 24日
Application note Improving Efficiency at Higher Loads with High Switching Frequencies PDF | HTML 2021年 6月 16日
Functional safety information TPS62851x Functional Safety, FIT Rate, Failure Mode Distribution and Pin FMA PDF | HTML 2021年 3月 24日
Certificate TPS628511EVM-139 EU Declaration of Conformity (DoC) 2020年 7月 27日

設計與開發

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開發板

TPS628511EVM-139 — 採用 SOT583 封裝評估板的 2.7-V 至 6-V、1-A 降壓轉換器

TPS628511EVM-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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模擬型號

TPS628511 PSpice Unencrypted Transient Model (Rev. A)

SLUM809A.ZIP (172 KB) - PSpice Model
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