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線性與低壓差 (LDO) 穩壓器

TPS7A25

現行

具有電源良好功能的 300mA、18V、超低 IQ、高準確度、可調整低壓差電壓穩壓器

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TPS7A25

現行
產品規格表 立即訂購

產品詳細資料

Output options Adjustable Output, Fixed Output Iout (max) (A) 0.3 Vin (max) (V) 18 Vin (min) (V) 2.4 Vout (max) (V) 17.64 Vout (min) (V) 1.24 Fixed output options (V) 1.25, 1.8, 2.5, 3.3, 5 Noise (µVrms) 300 Iq (typ) (mA) 0.002 Thermal resistance θJA (°C/W) 73.3 Rating Catalog Load capacitance (min) (µF) 1 Regulated outputs (#) 1 Features Enable, Power good, Soft start Accuracy (%) 1 PSRR at 100 KHz (dB) 22 Dropout voltage (Vdo) (typ) (mV) 210 Operating temperature range (°C) -40 to 125
Output options Adjustable Output, Fixed Output Iout (max) (A) 0.3 Vin (max) (V) 18 Vin (min) (V) 2.4 Vout (max) (V) 17.64 Vout (min) (V) 1.24 Fixed output options (V) 1.25, 1.8, 2.5, 3.3, 5 Noise (µVrms) 300 Iq (typ) (mA) 0.002 Thermal resistance θJA (°C/W) 73.3 Rating Catalog Load capacitance (min) (µF) 1 Regulated outputs (#) 1 Features Enable, Power good, Soft start Accuracy (%) 1 PSRR at 100 KHz (dB) 22 Dropout voltage (Vdo) (typ) (mV) 210 Operating temperature range (°C) -40 to 125
WSON (DRV) 6 4 mm² 2 x 2
  • Ultra-low IQ: 2 µA
  • Input voltage: 2.4 V to 18 V
  • Output voltage options available:
    • Fixed: 1.25 V to 5.0 V
    • Adjustable: 1.24 V to 17.66 V
  • 1% accuracy over temperature
  • Low dropout: 340 mV (max) at 300 mA
  • Open-drain, power-good output
  • Thermal shutdown and overcurrent protection
  • Active overshoot pulldown
  • Operating junction temperature: –40°C to +125°C
  • Stable with 1-µF output capacitors
  • Package: 6-pin WSON
  • Ultra-low IQ: 2 µA
  • Input voltage: 2.4 V to 18 V
  • Output voltage options available:
    • Fixed: 1.25 V to 5.0 V
    • Adjustable: 1.24 V to 17.66 V
  • 1% accuracy over temperature
  • Low dropout: 340 mV (max) at 300 mA
  • Open-drain, power-good output
  • Thermal shutdown and overcurrent protection
  • Active overshoot pulldown
  • Operating junction temperature: –40°C to +125°C
  • Stable with 1-µF output capacitors
  • Package: 6-pin WSON

The TPS7A25 low-dropout (LDO) linear voltage regulator introduces a combination of a 2.4-V to 18-V input voltage range with very-low quiescent current (IQ). These features help modern appliances meet increasingly stringent energy requirements, and help extend battery life in portable-power solutions.

The TPS7A25 is available in both fixed and adjustable versions. For more flexibility or higher output voltages, the adjustable version uses feedback resistors to set the output voltage from 1.24 V to 17.64 V. Both versions have a 1% output regulation accuracy that provides precision regulation for most microcontroller (MCU) references.

The TPS7A25 LDO operates more efficiently than standard linear regulators because the maximum dropout voltage is less than 340 mV at 300 mA of current. This maximum dropout voltage allows for 92.5% efficiency from a 5.4-V input voltage (VIN) to a 5.0-V output voltage (VOUT).

The power-good (PG) indicator can be used to either hold an MCU in reset until power is good, or for sequencing. The PG pin is an open-drain output; therefore, the pin is easily level-shifted for monitoring by a rail other than VOUT. The built-in current limit and thermal shutdown help protect the regulator in the event of a load short or fault.

For a higher output current alternative, consider the TPS7A26.

The TPS7A25 low-dropout (LDO) linear voltage regulator introduces a combination of a 2.4-V to 18-V input voltage range with very-low quiescent current (IQ). These features help modern appliances meet increasingly stringent energy requirements, and help extend battery life in portable-power solutions.

The TPS7A25 is available in both fixed and adjustable versions. For more flexibility or higher output voltages, the adjustable version uses feedback resistors to set the output voltage from 1.24 V to 17.64 V. Both versions have a 1% output regulation accuracy that provides precision regulation for most microcontroller (MCU) references.

The TPS7A25 LDO operates more efficiently than standard linear regulators because the maximum dropout voltage is less than 340 mV at 300 mA of current. This maximum dropout voltage allows for 92.5% efficiency from a 5.4-V input voltage (VIN) to a 5.0-V output voltage (VOUT).

The power-good (PG) indicator can be used to either hold an MCU in reset until power is good, or for sequencing. The PG pin is an open-drain output; therefore, the pin is easily level-shifted for monitoring by a rail other than VOUT. The built-in current limit and thermal shutdown help protect the regulator in the event of a load short or fault.

For a higher output current alternative, consider the TPS7A26.
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類型 標題 日期
* Data sheet TPS7A25 300-mA, 18-V, Ultra-Low IQ, Low-Dropout Linear Voltage Regulator With Power-Good datasheet (Rev. C) PDF | HTML 2022年 12月 2日
White paper Understanding the Foundations of Quiescent Current in Linear Power Systems 2021年 2月 18日
EVM User's guide TPS7A26EVM-021 Evaluation Module User's Guide 2018年 12月 7日

設計與開發

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開發板

TPS7A26EVM-021 — 具有電源良狀態好的 TPS7A26 500-mA 18-V 超低 IQ LDO 線性穩壓器評估模組

The TPS7A26 evaluation module (EVM) is designed for a typical configuration to evaluate the operation and performance of the TPS7A26 device, which is a 500-mA low-dropout (LDO) linear regulator.

TPS7A26EVM-021 is configured to be a reference design for engineering applications requiring current to a (...)

使用指南: PDF
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TPS7A2501 Unencrypted PSPICE TRANSIENT MODEL

SBVM941.ZIP (55 KB) - PSpice Model
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參考設計

TIDA-010247 — 具堆疊式電池監控器的高壓側 N-MOSFET 控制 (高達 32s) 電池組參考設計

此參考設計為高壓側 N 通道 MOSFET 控制 (高達 32s) 電池組，且使用堆疊式 BQ769x2 電池監控器系列。此設計可監控每個電池芯電壓、電池組電流、電池芯和 MOSFET 溫度，並保護電池組，以確保安全使用。高壓側 N 通道 MOSFET 架構與最佳化驅動電路，可提供簡易的開關控制。此參考設計可實現低待機與運送模式耗電量，並可將兩組之間的電流差距最佳化。此參考設計適用於高電池芯數、高電壓及電池組應用。
Design guide: PDF
參考設計

TIDA-050031 — 適合汽車緊急呼叫應用的備用電池電源參考設計

This back-up power reference design is for automotive E-Call application. It uses one cell LiFePO4 as the backup battery. The minimum backup battery voltage can be down to 2 V with boost converter TPS61088-Q1; the maximum output power can be 8 V/1.7A. This reference design is low-cost, high (...)
Design guide: PDF
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