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AC/DC 和 DC/DC 轉換器 (整合式 FET)

TPS65261-1

現行

4.5V 至 18V 輸入電壓、3A/2A/2A 輸出電流三重同步

立即訂購
產品規格表

TPS65261-1

現行
產品規格表 立即訂購

產品詳細資料

Rating Catalog Topology Buck Iout (max) (A) 3 Vin (max) (V) 18 Vin (min) (V) 4.5 Vout (min) (V) 0.6 Features Enable, Power good, Soft Start Adjustable, Synchronous Rectification, UVLO adjustable Control mode current mode Switching frequency (min) (kHz) 250 Switching frequency (max) (kHz) 2000 Operating temperature range (°C) -40 to 85 Iq (typ) (µA) 600 Duty cycle (max) (%) 95 Type Converter
Rating Catalog Topology Buck Iout (max) (A) 3 Vin (max) (V) 18 Vin (min) (V) 4.5 Vout (min) (V) 0.6 Features Enable, Power good, Soft Start Adjustable, Synchronous Rectification, UVLO adjustable Control mode current mode Switching frequency (min) (kHz) 250 Switching frequency (max) (kHz) 2000 Operating temperature range (°C) -40 to 85 Iq (typ) (µA) 600 Duty cycle (max) (%) 95 Type Converter
VQFN (RHB) 32 25 mm² 5 x 5
  • Operating input supply voltage range (4.5 V to 18 V)
  • Feedback reference voltage 0.6 V±1%
  • Maximum continuous output current 3 A/2 A/2 A
  • Adjustable clock frequency from 250 kHz to 2 MHz
  • dedicated enable and soft start pins for each buck
  • Automatic power-up, power-down sequence
  • Pulse Skipping Mode (PSM) at Light Load (TPS65261 only)
  • Output voltage power-good indicator
  • Input voltage power failure indicator
  • Thermal overloading protection
  • Operating input supply voltage range (4.5 V to 18 V)
  • Feedback reference voltage 0.6 V±1%
  • Maximum continuous output current 3 A/2 A/2 A
  • Adjustable clock frequency from 250 kHz to 2 MHz
  • dedicated enable and soft start pins for each buck
  • Automatic power-up, power-down sequence
  • Pulse Skipping Mode (PSM) at Light Load (TPS65261 only)
  • Output voltage power-good indicator
  • Input voltage power failure indicator
  • Thermal overloading protection

The TPS65261, TPS65261-1 is a monolithic triple synchronous step-down (buck) converter with 3-A/2-A/2-A output currents. A wide 4.5-V to 18-V input supply voltage range encompasses the most intermediate bus voltages operating off 5-V, 9-V, 12-V or 15-V power bus. The converter, with constant frequency peak current mode, is designed to simplify its application while giving designers options to optimize the system according to targeted applications. The switching frequency of the converters can be adjusted from 250 kHz to 2 MHz with an external resistor. The 180° out-of-phase operation between Buck1 and Buck2, 3 (Buck2 and 3 run in phase) minimizes the input filter requirements.

The TPS65261, TPS65261-1 features an automatic power sequence with connecting MODE pin to V7V and configuring EN1/2/3 pins. The device also features an open drain RESET signal to monitor power down.

At light load, the TPS65261 automatically operates in pulse skipping mode (PSM) and the TPS65261-1 operates in force continuous current mode (FCC). PSM mode provides high efficiency by reducing switching losses at light loads and FCC mode reduces noise susceptibility and RF interference.

The device features overvoltage protection, overcurrent and short-circuit protection and over-temperature protection. A power-good pin asserts when any output voltages are out of regulation.

The TPS65261, TPS65261-1 is a monolithic triple synchronous step-down (buck) converter with 3-A/2-A/2-A output currents. A wide 4.5-V to 18-V input supply voltage range encompasses the most intermediate bus voltages operating off 5-V, 9-V, 12-V or 15-V power bus. The converter, with constant frequency peak current mode, is designed to simplify its application while giving designers options to optimize the system according to targeted applications. The switching frequency of the converters can be adjusted from 250 kHz to 2 MHz with an external resistor. The 180° out-of-phase operation between Buck1 and Buck2, 3 (Buck2 and 3 run in phase) minimizes the input filter requirements.

The TPS65261, TPS65261-1 features an automatic power sequence with connecting MODE pin to V7V and configuring EN1/2/3 pins. The device also features an open drain RESET signal to monitor power down.

At light load, the TPS65261 automatically operates in pulse skipping mode (PSM) and the TPS65261-1 operates in force continuous current mode (FCC). PSM mode provides high efficiency by reducing switching losses at light loads and FCC mode reduces noise susceptibility and RF interference.

The device features overvoltage protection, overcurrent and short-circuit protection and over-temperature protection. A power-good pin asserts when any output voltages are out of regulation.
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類型 標題 日期
* Data sheet TPS6526x 4.5-V to 18-V Input Voltage, 3-A/2-A/2-A Output Current Triple Synchronous Step-Down Converter datasheet (Rev. C) PDF | HTML 2023年 5月 10日

設計與開發

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開發板

TPS65261-1EVM — TPS65261-1EVM 評估板

The TPS65261-1EVM is a high current, synchronous step down three buck switcher evaluation module. The user's guide document presents the information required to power the TPS65261 PMIC as well as the support documentation including schematic and bill of materials. The TPS65261 PMIC is designed to (...)
使用指南: PDF | HTML
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參考設計

PMP21500 — 精巧型三路輸出 3-A / 2-A / 2-A 降壓穩壓器參考設計

此參考設計為三輸出 3A / 2A / 2A 負載點轉換器，採用精巧設計，解決方案尺寸為 0.5 吋 × 0.875 吋 (12.7mm × 22.2mm)。  TPS65261-1 將三個 3A / 2A / 2A 降壓穩壓器完全整合至小型 5mm × 5mm QFN 封裝中。它配備專用啟用及緩啟動接腳，使追蹤與排序操作更易於實作。佈局經過尺寸優化。適用於尺寸受限應用的三輸出建構區塊。
Test report: PDF
電路圖: PDF
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VQFN (RHB) 32 Ultra Librarian
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