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Linear & low-dropout (LDO) regulators

LP38503-ADJ

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3-A, adjustable ultra-low-dropout voltage regulator

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Data sheet

LP38503-ADJ

ACTIVE
Data sheet Order now

Product details

Output options Adjustable Output Iout (max) (A) 3 Vin (max) (V) 5.5 Vin (min) (V) 2.7 Vout (max) (V) 5 Vout (min) (V) 0.6 Rating Catalog Noise (µVrms) 100 PSRR at 100 KHz (dB) 25 Iq (typ) (mA) 2 Thermal resistance θJA (°C/W) 33 Load capacitance (min) (µF) 10 Regulated outputs (#) 1 Accuracy (%) 2 Dropout voltage (Vdo) (typ) (mV) 420 Operating temperature range (°C) -40 to 125
Output options Adjustable Output Iout (max) (A) 3 Vin (max) (V) 5.5 Vin (min) (V) 2.7 Vout (max) (V) 5 Vout (min) (V) 0.6 Rating Catalog Noise (µVrms) 100 PSRR at 100 KHz (dB) 25 Iq (typ) (mA) 2 Thermal resistance θJA (°C/W) 33 Load capacitance (min) (µF) 10 Regulated outputs (#) 1 Accuracy (%) 2 Dropout voltage (Vdo) (typ) (mV) 420 Operating temperature range (°C) -40 to 125
TO-263 (KTT) 5 154.8384 mm² 10.16 x 15.24 TO-263 (NDQ) 5 142.3416 mm² 10.16 x 14.01
  • Input Voltage: 2.7 V to 5.5 V
  • Adjustable Output Voltage: 0.6 V
    to 5 V
  • FlexCap: Stable with Ceramic, Tantalum,
    or Aluminum Capacitors
  • Stable With 10-µF Input and
    Output Capacitors
  • Low Ground-Pin Current
  • 25-nA Quiescent Current in Shutdown Mode
  • Ensured Output Current of 3 A
  • Ensured VADJ Accuracy of
    ±1.5% at 25°C (A Grade)
  • Ensured Accuracy of ±3.5% at
    25°C (STD)
  • Overtemperature and Overcurrent Protection
  • ENABLE (EN) Pin (LP38501 only)
  • –40°C to +125°C Operating
    Temperature Range
  • Input Voltage: 2.7 V to 5.5 V
  • Adjustable Output Voltage: 0.6 V
    to 5 V
  • FlexCap: Stable with Ceramic, Tantalum,
    or Aluminum Capacitors
  • Stable With 10-µF Input and
    Output Capacitors
  • Low Ground-Pin Current
  • 25-nA Quiescent Current in Shutdown Mode
  • Ensured Output Current of 3 A
  • Ensured VADJ Accuracy of
    ±1.5% at 25°C (A Grade)
  • Ensured Accuracy of ±3.5% at
    25°C (STD)
  • Overtemperature and Overcurrent Protection
  • ENABLE (EN) Pin (LP38501 only)
  • –40°C to +125°C Operating
    Temperature Range

TI’s FlexCap low-dropout (LDO) linear regulators feature unique compensation that allow use of any type of output capacitor with no limits on minimum or maximum equivalent series resistance (ESR). The LP38501 and LP38503 series of LDOs operate from a 2.7-V to 5.5-V input supply. These ultra-low-dropout linear regulators respond very quickly to step changes in load, making them suitable for low-voltage microprocessor applications. Developed on a CMOS process (utilizing a PMOS pass transistor) the LP38501-ADJ and LP38503-ADJ have low quiescent currents that change little with load current.

  • GND Pin Current: Typically 2 mA at 3-A load current.
  • Disable Mode: Typically 25-nA quiescent current when the EN pin is pulled low.
  • Simplified Compensation: Stable with any type of output capacitor, regardless of ESR.
  • Precision Output: grade versions available with 1.5% VADJ tolerance (25°C) and 3% over line, load, and temperature.

TI’s FlexCap low-dropout (LDO) linear regulators feature unique compensation that allow use of any type of output capacitor with no limits on minimum or maximum equivalent series resistance (ESR). The LP38501 and LP38503 series of LDOs operate from a 2.7-V to 5.5-V input supply. These ultra-low-dropout linear regulators respond very quickly to step changes in load, making them suitable for low-voltage microprocessor applications. Developed on a CMOS process (utilizing a PMOS pass transistor) the LP38501-ADJ and LP38503-ADJ have low quiescent currents that change little with load current.

  • GND Pin Current: Typically 2 mA at 3-A load current.
  • Disable Mode: Typically 25-nA quiescent current when the EN pin is pulled low.
  • Simplified Compensation: Stable with any type of output capacitor, regardless of ESR.
  • Precision Output: grade versions available with 1.5% VADJ tolerance (25°C) and 3% over line, load, and temperature.

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Type Title Date
* Data sheet LP3850x-ADJ, LP3850xA-ADJ 3-A FlexCap Low Dropout Linear Regulator for 2.7-V to 5.5-V Inputs datasheet (Rev. I) PDF | HTML 27 Aug 2015
Application note AN-2219 Precision Current Limiting with the LMP8646 and LP38501 (Rev. A) 24 Apr 2013

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TO-263 (KTT) 5 Ultra Librarian
TO-263 (NDQ) 5 Ultra Librarian
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