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線性與低壓差 (LDO) 穩壓器

LP38851

現行

具啟用功能的 800-mA、低 VIN (0.915-V) 可調式超低壓降電壓穩壓器

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open-in-new 比較替代產品
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TPS74801 現行 具電源良好與啟用功能的 1.5-A、低 VIN (0.8-V) 可調式低壓降 (LDO) 電壓穩壓器 Higher current with improved PSRR and accuracy

LP38851

現行
立即訂購

產品詳細資料

Rating Catalog Vin (max) (V) 5.5 Vin (min) (V) 0.915 Iout (max) (A) 0.8 Output options Adjustable Output Vout (max) (V) 1.8 Vout (min) (V) 0.8 Noise (µVrms) 90 PSRR at 100 KHz (dB) 50 Iq (typ) (mA) 10 Features Enable, Soft start Thermal resistance θJA (°C/W) 60 Load capacitance (min) (µF) 10 Regulated outputs (#) 1 Accuracy (%) 2 Dropout voltage (Vdo) (typ) (mV) 115 Operating temperature range (°C) -40 to 125
Rating Catalog Vin (max) (V) 5.5 Vin (min) (V) 0.915 Iout (max) (A) 0.8 Output options Adjustable Output Vout (max) (V) 1.8 Vout (min) (V) 0.8 Noise (µVrms) 90 PSRR at 100 KHz (dB) 50 Iq (typ) (mA) 10 Features Enable, Soft start Thermal resistance θJA (°C/W) 60 Load capacitance (min) (µF) 10 Regulated outputs (#) 1 Accuracy (%) 2 Dropout voltage (Vdo) (typ) (mV) 115 Operating temperature range (°C) -40 to 125
TO-263 (KTW) 7 153.924 mm² (10.1 mm × 15.24 mm) HSOIC (DDA) 8 29.4 mm² (4.9 mm × 6 mm) TO-220 (NDZ) 7 82.6008 mm² (10.16 mm × 8.13 mm)
  • Adjustable VOUT Range of 0.80V to 1.8V
  • Wide VBIAS Supply Operating Range of 3.0V to 5.5V
  • Stable with 10µF Ceramic Capacitors
  • Dropout Voltage of 115 mV (Typical) at 800 mA Load Current
  • Precision VADJ across All Line and Load Conditions:
    • ±1.5% VADJ for TJ = 25°C
    • ±2.0% VADJ for 0°C ≤ TJ ≤ +125°C
    • ±3.0% VADJ for -40°C ≤ TJ ≤ +125°C
  • Over-Temperature and Over-Current Protection
  • Available in 8-Lead SO PowerPad,
    7-Lead SFM and 7-Lead PFM Packages
  • −40°C to +125°C Operating Junction Temperature Range

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  • Adjustable VOUT Range of 0.80V to 1.8V
  • Wide VBIAS Supply Operating Range of 3.0V to 5.5V
  • Stable with 10µF Ceramic Capacitors
  • Dropout Voltage of 115 mV (Typical) at 800 mA Load Current
  • Precision VADJ across All Line and Load Conditions:
    • ±1.5% VADJ for TJ = 25°C
    • ±2.0% VADJ for 0°C ≤ TJ ≤ +125°C
    • ±3.0% VADJ for -40°C ≤ TJ ≤ +125°C
  • Over-Temperature and Over-Current Protection
  • Available in 8-Lead SO PowerPad,
    7-Lead SFM and 7-Lead PFM Packages
  • −40°C to +125°C Operating Junction Temperature Range

All trademarks are the property of their respective owners.

The LP38851-ADJ is a high current, fast response regulator which can maintain output voltage regulation with extremely low input to output voltage drop. Fabricated on a CMOS process, the device operates from two input voltages: VBIAS provides voltage to drive the gate of the N-MOS power transistor, while VIN is the input voltage which supplies power to the load. The use of an external bias rail allows the part to operate from ultra low VIN voltages. Unlike bipolar regulators, the CMOS architecture consumes extremely low quiescent current at any output load current. The use of an N-MOS power transistor results in wide bandwidth, yet minimum external capacitance is required to maintain loop stability.

The fast transient response of this device makes it suitable for use in powering DSP, Microcontroller Core voltages and Switch Mode Power Supply post regulators. The part is available in PSOP 8–pin, SFM 7–pin, and TO-263 7-pin packages.

  • Dropout Voltage: 115 mV (typical) at 800 mA load current
  • Low Ground Pin Current: 10 mA (typical) at 800 mA load current
  • Soft-Start: Programmable Soft-Start time
  • Precision ADJ Voltage: ±1.5% for TJ = 25°C, and ±2.0% for 0°C ≤ TJ ≤ +125°C, across all line and load conditions

The LP38851-ADJ is a high current, fast response regulator which can maintain output voltage regulation with extremely low input to output voltage drop. Fabricated on a CMOS process, the device operates from two input voltages: VBIAS provides voltage to drive the gate of the N-MOS power transistor, while VIN is the input voltage which supplies power to the load. The use of an external bias rail allows the part to operate from ultra low VIN voltages. Unlike bipolar regulators, the CMOS architecture consumes extremely low quiescent current at any output load current. The use of an N-MOS power transistor results in wide bandwidth, yet minimum external capacitance is required to maintain loop stability.

The fast transient response of this device makes it suitable for use in powering DSP, Microcontroller Core voltages and Switch Mode Power Supply post regulators. The part is available in PSOP 8–pin, SFM 7–pin, and TO-263 7-pin packages.

  • Dropout Voltage: 115 mV (typical) at 800 mA load current
  • Low Ground Pin Current: 10 mA (typical) at 800 mA load current
  • Soft-Start: Programmable Soft-Start time
  • Precision ADJ Voltage: ±1.5% for TJ = 25°C, and ±2.0% for 0°C ≤ TJ ≤ +125°C, across all line and load conditions
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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 800 mA Fast-Response High-Accuracy Adj LDO Linear Reg w/ Enable & Soft-Start datasheet (Rev. C) 2013/4/5
選擇指南 Power Management Guide 2018 (Rev. R) 2018/6/25
選擇指南 Low Dropout Regulators Quick Reference Guide (Rev. P) 2018/3/21
應用說明 AN-1815 LDOs Ease the Stress of Start-Up (Rev. A) 2013/4/24

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TO-263 (KTW) 7 Ultra Librarian
HSOIC (DDA) 8 Ultra Librarian
TO-220 (NDZ) 7 Ultra Librarian
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