UA78L

現行

100-mA 30-V 線性電壓穩壓器

產品詳細資料

Rating Catalog Vin (max) (V) 30 Vin (min) (V) 4.75 Iout (max) (A) 0.1 Output options Fixed Output Vout (max) (V) 15 Vout (min) (V) 2.6 Fixed output options (V) 2.6, 3.3, 5, 6.2, 8, 9, 10, 12, 15 Noise (µVrms) 42 PSRR at 100 KHz (dB) 40 Iq (typ) (mA) 3.8 Thermal resistance θJA (°C/W) 55 Load capacitance (min) (µF) 0.1 Regulated outputs (#) 1 Accuracy (%) 3.75 Dropout voltage (Vdo) (typ) (mV) 1700 Operating temperature range (°C) -40 to 125
Rating Catalog Vin (max) (V) 30 Vin (min) (V) 4.75 Iout (max) (A) 0.1 Output options Fixed Output Vout (max) (V) 15 Vout (min) (V) 2.6 Fixed output options (V) 2.6, 3.3, 5, 6.2, 8, 9, 10, 12, 15 Noise (µVrms) 42 PSRR at 100 KHz (dB) 40 Iq (typ) (mA) 3.8 Thermal resistance θJA (°C/W) 55 Load capacitance (min) (µF) 0.1 Regulated outputs (#) 1 Accuracy (%) 3.75 Dropout voltage (Vdo) (typ) (mV) 1700 Operating temperature range (°C) -40 to 125
TO-92 (LP) 3 19.136 mm² (5.2 mm × 3.68 mm) SOT-89 (PK) 3 18.4275 mm² (4.5 mm × 4.095 mm) SOIC (D) 8 29.4 mm² (4.9 mm × 6 mm)
  • Input voltage range (V I): 4.75 V to 35 V
  • Output voltage range (V O):
    • 2.6 V to 15 V (for legacy chip)
    • 3.3 V to 15 V (for new chip)
  • Output current: Up to 100 mA
  • Quiescent current I Q: 3.8 mA
  • Built-in short-circuit current limiting and thermal protection
  • Stable without any external component
  • Supported temperature range:
    • Legacy chip C and AC versions: 0°C to +125°C
    • Legacy chip AI version: –40°C to +125°C
    • New chip: –40°C to +125°C
  • Packages:
    • 8-pin, 4.9-mm × 3.91-mm SOIC
    • 3-pin, 4.3-mm × 4.3-mm TO-92
    • 3-pin, 4.5-mm × 2.5-mm SOT-89
  • Input voltage range (V I): 4.75 V to 35 V
  • Output voltage range (V O):
    • 2.6 V to 15 V (for legacy chip)
    • 3.3 V to 15 V (for new chip)
  • Output current: Up to 100 mA
  • Quiescent current I Q: 3.8 mA
  • Built-in short-circuit current limiting and thermal protection
  • Stable without any external component
  • Supported temperature range:
    • Legacy chip C and AC versions: 0°C to +125°C
    • Legacy chip AI version: –40°C to +125°C
    • New chip: –40°C to +125°C
  • Packages:
    • 8-pin, 4.9-mm × 3.91-mm SOIC
    • 3-pin, 4.3-mm × 4.3-mm TO-92
    • 3-pin, 4.5-mm × 2.5-mm SOT-89

The UA78L series of fixed-voltage linear regulators is designed for a wide range of applications. The UA78L series can be used for on-card regulation to eliminate the noise and distribution problems associated with single-point regulation. The UA78L can also be used with power-pass elements to make high-current voltage regulators. The UA78L series regulators can deliver up to 100 mA of output current. Additionally, the UA78L does not need an external capacitor for stable operation across the load current range. The internal current-limiting and thermal-shutdown features of these regulators help protect the device from overload.

For the legacy chip, the UA78L00C and UA78L00AC series are characterized for the junction temperature range of 0°C to +125°C and the UA78L05AI device is characterized for the operating junction temperature range of –40°C to +125°C.

For the new chip, the UA78L series is characterized for the junction temperature range of –40°C to +125°C.

The UA78L series of fixed-voltage linear regulators is designed for a wide range of applications. The UA78L series can be used for on-card regulation to eliminate the noise and distribution problems associated with single-point regulation. The UA78L can also be used with power-pass elements to make high-current voltage regulators. The UA78L series regulators can deliver up to 100 mA of output current. Additionally, the UA78L does not need an external capacitor for stable operation across the load current range. The internal current-limiting and thermal-shutdown features of these regulators help protect the device from overload.

For the legacy chip, the UA78L00C and UA78L00AC series are characterized for the junction temperature range of 0°C to +125°C and the UA78L05AI device is characterized for the operating junction temperature range of –40°C to +125°C.

For the new chip, the UA78L series is characterized for the junction temperature range of –40°C to +125°C.

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技術文件

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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 UA78L Series Positive-Voltage Linear Regulators datasheet (Rev. X) PDF | HTML 2023/6/23
應用說明 An empirical analysis of the impact of board layout on LDO thermal performance (Rev. A) PDF | HTML 2025/9/23
應用說明 LDO Noise Demystified (Rev. B) PDF | HTML 2020/8/18
應用說明 A Topical Index of TI LDO Application Notes (Rev. F) 2019/6/27
電子書 LDO Basics (Rev. A) 2019/4/8
應用說明 LDO PSRR Measurement Simplified (Rev. A) PDF | HTML 2017/8/9
技術文章 LDO basics: dropout PDF | HTML 2017/3/16

設計與開發

如需其他條款或必要資源,請按一下下方的任何標題以檢視詳細頁面 (如有)。

開發板

UA78LEVM-075 — 適用於 100-mA 30-V 線性電壓穩壓器的 UA78L 評估模組

UA78L 評估模組 (EVM) 是一款平台,可評估採用 PK 封裝之 UA78L 線性穩壓器的運作與性能。此 EVM 配置包含適合一般應用的單一 100-mA、三端子、低壓差 (LDO) 穩壓器。穩壓器可提供最高達 100-mA 的輸出電流,並具備高達 20 V 的輸入電壓 (VIN) 範圍。

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模擬型號

UA78L PK PSpice Model

SLVME11.ZIP (17 KB) - PSpice 模型
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參考設計

PMP15038 — 適用於電池測試系統的 50A、0.05% 電流準確度電源參考設計

此參考設計介紹電池測試系統 (BTS) 所使用的大電流、高準確度及雙向電源解決方案。其包括 LM5170EVM-BIDIR 和訊號控制電路板。LM5170EVM-BIDIR 是一款 展示雙通道雙向電流控制器 LM5170-Q1 高性能的評估板。訊號控制電路板內建精準放大器,可搭配 LM5170EVM-BIDIR 操作,進一步提升電流準確度。工作台測試顯示電流準確度優於全刻度的 0.05%。
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參考設計

PMP15043 — 適用於電池測試系統的 6A、0.05% 電流準確度電源解決方案的參考設計

此參考設計電路介紹電池測試系統 (BTS) 所使用的高準確度及雙向電流電源解決方案。最大電流能力為 6A,全刻度精度低於 0.05%。電路可透過邏輯針腳進行控制,用於為電池充電或放電。在充電期間,也可透過類比訊號控制電池電壓。配備完全整合式降壓及升壓轉換器後,電路設計簡單且容易。專為驗證此解決方案性能而打造的評估板。
支援產品和硬體
封裝 針腳 CAD 符號、佔位空間與 3D 模型
TO-92 (LP) 3 Ultra Librarian
SOT-89 (PK) 3 Ultra Librarian
SOIC (D) 8 Ultra Librarian

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