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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

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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 Operating temperature range (°C) -40 to 150 TI functional safety category Functional Safety-Capable Topology Buck Type Converter Iout (max) (A) 1 Vin (min) (V) 2.7 Vin (max) (V) 6 Switching frequency (min) (kHz) 2025 Switching frequency (max) (kHz) 2475 Features Enable, Forced PWM, Frequency synchronization, Light load efficiency, Output discharge, Over Current Protection, Power good, Pre-Bias Start-Up, Soft Start Adjustable, Synchronous Rectification, Tracking, UVLO adjustable EMI features Spread Spectrum Control mode current mode Vout (min) (V) 0.6 Vout (max) (V) 5.5 Iq (typ) (µA) 17 Duty cycle (max) (%) 100
Rating Catalog Operating temperature range (°C) -40 to 150 TI functional safety category Functional Safety-Capable Topology Buck Type Converter Iout (max) (A) 1 Vin (min) (V) 2.7 Vin (max) (V) 6 Switching frequency (min) (kHz) 2025 Switching frequency (max) (kHz) 2475 Features Enable, Forced PWM, Frequency synchronization, Light load efficiency, Output discharge, Over Current Protection, Power good, Pre-Bias Start-Up, Soft Start Adjustable, Synchronous Rectification, Tracking, UVLO adjustable EMI features Spread Spectrum Control mode current mode Vout (min) (V) 0.6 Vout (max) (V) 5.5 Iq (typ) (µA) 17 Duty cycle (max) (%) 100
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

The TPS628511EVM-139 evaluation module (EVM) is used to evaluate the TPS62851x device. The TPS62851x device is a high-frequency, synchronous, step-down converter optimized for a small solution size and high efficiency. The devices focus on high-efficiency, step-down conversion over a wide output (...)
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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  • 材料內容
  • 認證摘要
  • 進行中持續性的可靠性監測
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