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線性與低壓差 (LDO) 穩壓器

LP38859

現行

3-A、低 VIN (1.15-V)、高精度、超低壓降電壓穩壓器

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產品規格表

LP38859

現行
產品規格表 立即訂購

產品詳細資料

Output options Fixed Output Iout (max) (A) 3 Vin (max) (V) 5.5 Vin (min) (V) 1.15 Vout (max) (V) 1.2 Vout (min) (V) 0.8 Fixed output options (V) 0.8, 1.2 Rating Catalog Noise (µVrms) 150 PSRR at 100 KHz (dB) 37 Iq (typ) (mA) 10 Thermal resistance θJA (°C/W) 43 Load capacitance (min) (µF) 10 Regulated outputs (#) 1 Features Soft start Accuracy (%) 1 Dropout voltage (Vdo) (typ) (mV) 350 Operating temperature range (°C) -40 to 125
Output options Fixed Output Iout (max) (A) 3 Vin (max) (V) 5.5 Vin (min) (V) 1.15 Vout (max) (V) 1.2 Vout (min) (V) 0.8 Fixed output options (V) 0.8, 1.2 Rating Catalog Noise (µVrms) 150 PSRR at 100 KHz (dB) 37 Iq (typ) (mA) 10 Thermal resistance θJA (°C/W) 43 Load capacitance (min) (µF) 10 Regulated outputs (#) 1 Features Soft start Accuracy (%) 1 Dropout voltage (Vdo) (typ) (mV) 350 Operating temperature range (°C) -40 to 125
TO-220 (NDH) 5 86.0552 mm² 10.16 x 8.47 TO-263 (KTT) 5 154.8384 mm² 10.16 x 15.24
  • Input Voltage: 1.1 V to 5.5 V
  • Wide VBIAS Supply Operating Range: 3 V to 5.5 V
  • Standard VOUT Values: 0.8 V and 1.2 V
  • Stable With 10-µF Ceramic Capacitors
  • Dropout Voltage of 240 mV (typical) at 3-A Load Current
  • Programmable Soft-Start Time
  • Precision Output Voltage Across All Line and Load Conditions:
    • ±1% VOUT for TJ = 25°C
    • ±2% VOUT for 0°C ≤ TJ ≤ +125°C
    • ±3% VOUT for –40°C ≤ TJ ≤ +125°C
  • Overtemperature and Overcurrent Protection
  • Operating Temperature Range: −40°C to +125°C
  • Input Voltage: 1.1 V to 5.5 V
  • Wide VBIAS Supply Operating Range: 3 V to 5.5 V
  • Standard VOUT Values: 0.8 V and 1.2 V
  • Stable With 10-µF Ceramic Capacitors
  • Dropout Voltage of 240 mV (typical) at 3-A Load Current
  • Programmable Soft-Start Time
  • Precision Output Voltage Across All Line and Load Conditions:
    • ±1% VOUT for TJ = 25°C
    • ±2% VOUT for 0°C ≤ TJ ≤ +125°C
    • ±3% VOUT for –40°C ≤ TJ ≤ +125°C
  • Overtemperature and Overcurrent Protection
  • Operating Temperature Range: −40°C to +125°C

The LP38859 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 LP38859 is available in 5-pin TO-220 and DDPAK/TO-263 packages.

For all available packages, see the orderable addendum at the end of the data sheet.

The LP38859 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 LP38859 is available in 5-pin TO-220 and DDPAK/TO-263 packages.

For all available packages, see the orderable addendum at the end of the data sheet.
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類型 標題 日期
* Data sheet LP38859 3-A Fast-Response High-Accuracy LDO Linear Regulator With Soft Start datasheet (Rev. F) PDF | HTML 2015年 9月 27日
Selection guide Power Management Guide 2018 (Rev. R) 2018年 6月 25日
Selection guide Low Dropout Regulators Quick Reference Guide (Rev. P) 2018年 3月 21日
EVM User's guide AN-1480 LP38859S-1.2 Evaluation Board (Rev. B) 2013年 4月 24日

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