Startseite Energiemanagement Linear- und Low-Dropout-Regler (LDO)

LP38852

AKTIV

Einstellbarer Spannungsregler mit extrem niedriger Dropout-Spannung, 1,5 A, niedrige VIN (0,93 V), m

Produktdetails

Output options Adjustable Output Iout (max) (A) 1.5 Vin (max) (V) 5.5 Vin (min) (V) 0.93 Vout (max) (V) 1.8 Vout (min) (V) 0.8 Noise (µVrms) 90 Iq (typ) (mA) 10 Thermal resistance θJA (°C/W) 34 Rating Catalog Load capacitance (min) (µF) 10 Regulated outputs (#) 1 Features Enable, Soft start Accuracy (%) 3 PSRR at 100 KHz (dB) 35 Dropout voltage (Vdo) (typ) (mV) 130 Operating temperature range (°C) -40 to 125
Output options Adjustable Output Iout (max) (A) 1.5 Vin (max) (V) 5.5 Vin (min) (V) 0.93 Vout (max) (V) 1.8 Vout (min) (V) 0.8 Noise (µVrms) 90 Iq (typ) (mA) 10 Thermal resistance θJA (°C/W) 34 Rating Catalog Load capacitance (min) (µF) 10 Regulated outputs (#) 1 Features Enable, Soft start Accuracy (%) 3 PSRR at 100 KHz (dB) 35 Dropout voltage (Vdo) (typ) (mV) 130 Operating temperature range (°C) -40 to 125
HSOIC (DDA) 8 29.4 mm² 4.9 x 6 TO-220 (NDZ) 7 82.6008 mm² 10.16 x 8.13 TO-263 (KTW) 7 153.924 mm² 10.1 x 15.24
  • Input VIN Range 0.93 V to 5.5 V
  • Adjustable VOUT Range 0.8 V to 1.8 V
  • Wide VBIAS Supply Operating Range 3 V to 5.5 V
  • Dropout Voltage of 130 mV (Typical) at 1.5-A Load Current
  • Precision Output Voltage Across All Line and Load Conditions:
    • ±1.5% VADJ for TJ = 25°C
    • ±2% VADJ for 0°C ≤ TJ ≤ +125°C
    • ±3% VADJ for –40°C ≤ TJ ≤ +125°C
  • Overtemperature and Overcurrent Protection
  • Stable with 10-µF Ceramic Capacitors
  • Available in 7-pin TO-220, 7-Pin DDPAK/TO-263, and 8-Pin SO PowerPAD Packages
  • −40°C to +125°C Operating Junction Temperature Range
  • Input VIN Range 0.93 V to 5.5 V
  • Adjustable VOUT Range 0.8 V to 1.8 V
  • Wide VBIAS Supply Operating Range 3 V to 5.5 V
  • Dropout Voltage of 130 mV (Typical) at 1.5-A Load Current
  • Precision Output Voltage Across All Line and Load Conditions:
    • ±1.5% VADJ for TJ = 25°C
    • ±2% VADJ for 0°C ≤ TJ ≤ +125°C
    • ±3% VADJ for –40°C ≤ TJ ≤ +125°C
  • Overtemperature and Overcurrent Protection
  • Stable with 10-µF Ceramic Capacitors
  • Available in 7-pin TO-220, 7-Pin DDPAK/TO-263, and 8-Pin SO PowerPAD Packages
  • −40°C to +125°C Operating Junction Temperature Range

The LP38852-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 ultralow 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.

130 mV (typical) at 1.5-A load current.

10 mA (typical) at 1.5-A load current.

Programmable soft-start time.

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

The LP38852-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 ultralow 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.

130 mV (typical) at 1.5-A load current.

10 mA (typical) at 1.5-A load current.

Programmable soft-start time.

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

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Technische Dokumentation

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Typ Titel Datum
* Data sheet LP38852-ADJ 1.5-A Fast-Response High-Accuracy Adjustable LDO Linear Regulator With Enable and Soft-Start datasheet (Rev. F) PDF | HTML 17 Dez 2015
Selection guide Power Management Guide 2018 (Rev. R) 25 Jun 2018
EVM User's guide AN-1560 LP38852MR-ADJ Evaluation Board (Rev. B) 24 Apr 2013
Application note AN-1815 LDOs Ease the Stress of Start-Up (Rev. A) 24 Apr 2013

Design und Entwicklung

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Gehäuse Pins CAD-Symbole, Footprints und 3D-Modelle
HSOIC (DDA) 8 Ultra Librarian
TO-220 (NDZ) 7 Ultra Librarian
TO-263 (KTW) 7 Ultra Librarian

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