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AC/DC 和 DC/DC 控制器 (外部 FET)

TPS51275B

現行

具 Out-of-Audio™ 模式的 5.5V 至 24V 雙同步降壓控制器

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產品規格表

現在提供此產品的更新版本

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功能與所比較的裝置相似
TPS51397A 現行 4.5-V 至 24-V 輸入、10-A 同步降壓穩壓器 Offers a lower IQ and is upgraded with soft start adjustable.

TPS51275B

現行
產品規格表 立即訂購

產品詳細資料

Vin (min) (V) 5 Vin (max) (V) 24 Iout (max) (A) 20 Operating temperature range (°C) -40 to 125 Control mode D-CAP Topology Buck Rating Catalog Vout (min) (V) 4.5 Vout (max) (V) 5.5 Features Enable, Light Load Efficiency, Power good, Synchronous Rectification Iq (typ) (µA) 800 Duty cycle (max) (%) 95 Number of phases 1
Vin (min) (V) 5 Vin (max) (V) 24 Iout (max) (A) 20 Operating temperature range (°C) -40 to 125 Control mode D-CAP Topology Buck Rating Catalog Vout (min) (V) 4.5 Vout (max) (V) 5.5 Features Enable, Light Load Efficiency, Power good, Synchronous Rectification Iq (typ) (µA) 800 Duty cycle (max) (%) 95 Number of phases 1
WQFN (RUK) 20 9 mm² 3 x 3
  • Input Voltage Range: 5 V to 24 V
  • Output Voltages: 5 V and 3.3 V (Adjustable Range ±10%)
  • Built-in, 100-mA, 5-V and 3.3-V LDOs
  • Clock Output for Charge-Pump
  • ±1% Reference Accuracy
  • Adaptive On-Time D-CAP Mode Control Architecture with 300-kHz and 355-kHz Frequency Setting
  • Auto-skip Light Load Operation (TPS51275, and TPS51275C)
  • OOA Light Load Operation (TPS51275B)
  • Internal 0.8-ms Voltage Servo Soft-Start
  • Low-Side RDS(on) Current Sensing Scheme
  • Built-In Output Discharge Function
  • Separate Enable Input for Switchers
  • Dedicated OC Setting Terminals
  • Power Good Indicator
  • OVP, UVP and OCP Protection
  • Non-Latch UVLO and OTP Protection
  • 20-Pin, 3 mm x 3 mm, QFN (RUK)
  • Input Voltage Range: 5 V to 24 V
  • Output Voltages: 5 V and 3.3 V (Adjustable Range ±10%)
  • Built-in, 100-mA, 5-V and 3.3-V LDOs
  • Clock Output for Charge-Pump
  • ±1% Reference Accuracy
  • Adaptive On-Time D-CAP Mode Control Architecture with 300-kHz and 355-kHz Frequency Setting
  • Auto-skip Light Load Operation (TPS51275, and TPS51275C)
  • OOA Light Load Operation (TPS51275B)
  • Internal 0.8-ms Voltage Servo Soft-Start
  • Low-Side RDS(on) Current Sensing Scheme
  • Built-In Output Discharge Function
  • Separate Enable Input for Switchers
  • Dedicated OC Setting Terminals
  • Power Good Indicator
  • OVP, UVP and OCP Protection
  • Non-Latch UVLO and OTP Protection
  • 20-Pin, 3 mm x 3 mm, QFN (RUK)

The TPS51275, TPS51275B and TPS51275C are cost-effective, dual-synchronous buck controllers targeted for notebook system-power supply solutions. It provides 5-V and 3.3-V LDOs and requires few external components. The 260-kHz VCLK output can be used to drive an external charge pump, generating gate drive voltage for the load switches without reducing the main converter efficiency. The TPS51275, TPS51275B and TPS51275C supports high efficiency, fast transient response and provides a combined power-good signal. Adaptive on-time, D-CAP™ control provides convenient and efficient operation. The device operates with supply input voltage ranging from 5 V to 24 V and supports output voltages of 5.0 V and 3.3 V. The TPS51275, TPS51275B and TPS51275C are available in a 20-pin, 3 mm x 3 mm, QFN package and is specified from –40°C to 85°C.

The TPS51275, TPS51275B and TPS51275C are cost-effective, dual-synchronous buck controllers targeted for notebook system-power supply solutions. It provides 5-V and 3.3-V LDOs and requires few external components. The 260-kHz VCLK output can be used to drive an external charge pump, generating gate drive voltage for the load switches without reducing the main converter efficiency. The TPS51275, TPS51275B and TPS51275C supports high efficiency, fast transient response and provides a combined power-good signal. Adaptive on-time, D-CAP™ control provides convenient and efficient operation. The device operates with supply input voltage ranging from 5 V to 24 V and supports output voltages of 5.0 V and 3.3 V. The TPS51275, TPS51275B and TPS51275C are available in a 20-pin, 3 mm x 3 mm, QFN package and is specified from –40°C to 85°C.
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技術文件

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類型 標題 日期
* Data sheet Dual Synchronous, Step-Down Controller with 5-V and 3.3-V LDOs datasheet (Rev. B) 2013年 2月 27日
Application note Mosfet Driver Circuit Design Guide for TPS512xx (Rev. A) 2019年 4月 1日

設計與開發

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模擬型號

TPS51275B TINA-TI Transient Reference Design

SLUM391.TSC (339 KB) - TINA-TI Reference Design
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模擬型號

TPS51275B TINA-TI Transient Spice Model

SLUM392.ZIP (136 KB) - TINA-TI Spice Model
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模擬型號

TPS51275B Unencrypted PSpice Transient Model Package (Rev. A)

SLUM369A.ZIP (126 KB) - PSpice Model
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WQFN (RUK) 20 Ultra Librarian
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