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TPS65321A-Q1

現行

具有廣泛 Vin 280mA LDO 穩壓器的汽車 3.6V 至 36V、3.2A 降壓轉換器

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產品規格表

TPS65321A-Q1

現行
產品規格表 立即訂購

產品詳細資料

Processor supplier Generic Processor name Generic Product type Microcontrollers Regulated outputs (#) 2 Step-down DC/DC converter 1 Step-up DC/DC converter 0 LDO 1 Vin (min) (V) 3.6 Vin (max) (V) 36 Vout (min) (V) 1.1 Vout (max) (V) 20 Iout (max) (A) 3.2 Configurability Hardware configurable Features Eco-mode, Enable, Overcurrent protection, Power good, Thermal shutdown, UVLO fixed Rating Automotive Operating temperature range (°C) -40 to 125 Step-down DC/DC controller 0 Step-up DC/DC controller 0 Iq (typ) (mA) 0.145 Switching frequency (max) (kHz) 2500 Shutdown current (ISD) (typ) (µA) 2
Processor supplier Generic Processor name Generic Product type Microcontrollers Regulated outputs (#) 2 Step-down DC/DC converter 1 Step-up DC/DC converter 0 LDO 1 Vin (min) (V) 3.6 Vin (max) (V) 36 Vout (min) (V) 1.1 Vout (max) (V) 20 Iout (max) (A) 3.2 Configurability Hardware configurable Features Eco-mode, Enable, Overcurrent protection, Power good, Thermal shutdown, UVLO fixed Rating Automotive Operating temperature range (°C) -40 to 125 Step-down DC/DC controller 0 Step-up DC/DC controller 0 Iq (typ) (mA) 0.145 Switching frequency (max) (kHz) 2500 Shutdown current (ISD) (typ) (µA) 2
HTSSOP (PWP) 14 32 mm² (5 mm × 6.4 mm)
  • Qualified for Automotive Applications
  • AEC-Q100 Qualified with the Following Results:
    • Device Temperature Grade 1: –40°C to +125°C Ambient Operating Temperature
    • Device HBM ESD Classification Level 2
    • Device CDM ESD Classification Level C4B
  • One High-VIN Step-Down DC-DC Converter
    • Input Range of 3.6 V to 36 V
    • 250-mΩ High-Side MOSFET
    • Maximum Load Current 3.2 A, Output Adjustable 1.1 V to 20 V
    • Adjustable Switching Frequency 100 kHz to 2.5 MHz
    • Synchronizes to External Clock
    • High Efficiency at Light Loads With Pulse-Skipping Eco-mode™ Control Scheme
    • Maximum 140-µA Operating Quiescent Current
    • Reset Output-Pin (Active Low, Open-Drain)
  • One High-VIN Low-Dropout (LDO) Voltage Regulator
    • Input Range of 3 V to 36 V
    • 280-mA Current Capability With Typical 35-µA Quiescent Current in No-Load Condition
    • Low-Dropout Voltage of 300 mV at
      IO = 200 mA (Typical)
  • Overcurrent Protection for Both Regulators
  • Overtemperature Protection
  • 14-Pin HTSSOP Package With PowerPAD™ Integrated Circuit Package
  • Qualified for Automotive Applications
  • AEC-Q100 Qualified with the Following Results:
    • Device Temperature Grade 1: –40°C to +125°C Ambient Operating Temperature
    • Device HBM ESD Classification Level 2
    • Device CDM ESD Classification Level C4B
  • One High-VIN Step-Down DC-DC Converter
    • Input Range of 3.6 V to 36 V
    • 250-mΩ High-Side MOSFET
    • Maximum Load Current 3.2 A, Output Adjustable 1.1 V to 20 V
    • Adjustable Switching Frequency 100 kHz to 2.5 MHz
    • Synchronizes to External Clock
    • High Efficiency at Light Loads With Pulse-Skipping Eco-mode™ Control Scheme
    • Maximum 140-µA Operating Quiescent Current
    • Reset Output-Pin (Active Low, Open-Drain)
  • One High-VIN Low-Dropout (LDO) Voltage Regulator
    • Input Range of 3 V to 36 V
    • 280-mA Current Capability With Typical 35-µA Quiescent Current in No-Load Condition
    • Low-Dropout Voltage of 300 mV at
      IO = 200 mA (Typical)
  • Overcurrent Protection for Both Regulators
  • Overtemperature Protection
  • 14-Pin HTSSOP Package With PowerPAD™ Integrated Circuit Package

The TPS65321A-Q1 device is a combination of a high-VIN DC-DC step-down converter, referred to as the buck regulator, with an adjustable switch-mode frequency from 100-kHz to 2.5-MHz, and a high-VIN 280-mA low-dropout (LDO) regulator. The input range is 3.6 V to 36 V for the buck regulator, and 3 V to
36 V for the LDO regulator. The buck regulator has an integrated high-side MOSFET with an active-low, open-drain power-good output-pin (nRST). The LDO regulator features a low-input supply current of 45-µA typical in no-load, also has an integrated MOSFET. Low-voltage tracking feature enables TPS65321A-Q1 to track the input supply during cold-crank conditions.

The buck regulator provides a flexible design to fit system needs. The external loop compensation circuit allows for optimization of the converter response for the appropriate operating conditions. A low-ripple pulse-skip mode reduces the no-load input-supply current to maximum 140 µA.

The device has built-in protection features such as soft start, current-limit, thermal sensing and shutdown due to excessive power dissipation. Furthermore, the device has an internal undervoltage-lockout (UVLO) function that turns off the device when the supply voltage is too low.

The TPS65321A-Q1 device is a combination of a high-VIN DC-DC step-down converter, referred to as the buck regulator, with an adjustable switch-mode frequency from 100-kHz to 2.5-MHz, and a high-VIN 280-mA low-dropout (LDO) regulator. The input range is 3.6 V to 36 V for the buck regulator, and 3 V to
36 V for the LDO regulator. The buck regulator has an integrated high-side MOSFET with an active-low, open-drain power-good output-pin (nRST). The LDO regulator features a low-input supply current of 45-µA typical in no-load, also has an integrated MOSFET. Low-voltage tracking feature enables TPS65321A-Q1 to track the input supply during cold-crank conditions.

The buck regulator provides a flexible design to fit system needs. The external loop compensation circuit allows for optimization of the converter response for the appropriate operating conditions. A low-ripple pulse-skip mode reduces the no-load input-supply current to maximum 140 µA.

The device has built-in protection features such as soft start, current-limit, thermal sensing and shutdown due to excessive power dissipation. Furthermore, the device has an internal undervoltage-lockout (UVLO) function that turns off the device when the supply voltage is too low.
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TPS65320D-Q1 現行 具有自動來源 280mA LDO 穩壓器的汽車 3.6V 至 36V、3.2A 降壓轉換器 This product is a variant and does not have an auto-sourcing feature.

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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 TPS65321A-Q1 36-V Step-Down Converter With Eco-mode™ and LDO Regulator datasheet PDF | HTML 2017/11/29
應用說明 Low Quiescent Current With Asynchronous Buck-Converters at High Temperatures 2016/7/20
應用說明 Interfacing TPS57xxx-Q1 and TPS65320-Q1 Family Devices With Low Impendence Exter 2015/12/8
應用說明 TPS65321-Q1 Design Checklist 2015/11/23

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開發板

TPS65321EVM — 具有 EcoMode™ 和 LDO 穩壓器的 TPS65321-Q1 36V 降壓轉換器評估模組

德州儀器 TPS65321EVM 評估模組 (EVM) 可協助設計師評估 TPS65321 切換模式電源（多重輸出電壓穩壓器）的運作和性能。

使用指南: PDF
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TPS65321-Q1 PSpice Transient Model (Rev. A)

SLVMAL8A.ZIP (150 KB) - PSpice 模型
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參考設計

TIDA-00677 — 適用於降壓 + 線性 LED 驅動器系統的 CISPR25 車用尾燈參考設計

TIDA-00677 展示一款汽車用 LED 尾燈應用（尾燈／煞車燈、方向燈與倒車燈），其採用 TPS92630-Q1 線性 LED 驅動器，由上游降壓轉換器 TPS65321-Q1 提供電源，該轉換器則透過汽車電池電壓下的一顆智慧型反向電池二極體直接供電。本設計亦依據 CISPR25 與 ISO 7637-2 標準進行了 EMI/EMC 輻射與脈衝測試。有關潛在的成本節省與效率（功耗與系統熱效能）方面的更多資訊，請參閱使用者指南。有關由升壓轉換器驅動的類似設計，請參閱 TIDA-00678。有關直接由汽車電池驅動的類似設計，請參閱 TIDA-00679。
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