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Linear & low-dropout (LDO) regulators

LP38502-ADJ

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1.5-A, adjustable ultra-low-dropout voltage regulator with enable

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Data sheet

LP38502-ADJ

ACTIVE
Data sheet Order now

Product details

Rating Catalog Vin (max) (V) 5.5 Vin (min) (V) 2.7 Iout (max) (A) 1.5 Output options Adjustable Output Vout (max) (V) 5 Vout (min) (V) 0.6 Noise (µVrms) 100 PSRR at 100 KHz (dB) 25 Iq (typ) (mA) 2 Features Enable Thermal resistance θJA (°C/W) 33 Load capacitance (min) (µF) 10 Regulated outputs (#) 1 Accuracy (%) 2 Dropout voltage (Vdo) (typ) (mV) 220 Operating temperature range (°C) -40 to 125
Rating Catalog Vin (max) (V) 5.5 Vin (min) (V) 2.7 Iout (max) (A) 1.5 Output options Adjustable Output Vout (max) (V) 5 Vout (min) (V) 0.6 Noise (µVrms) 100 PSRR at 100 KHz (dB) 25 Iq (typ) (mA) 2 Features Enable Thermal resistance θJA (°C/W) 33 Load capacitance (min) (µF) 10 Regulated outputs (#) 1 Accuracy (%) 2 Dropout voltage (Vdo) (typ) (mV) 220 Operating temperature range (°C) -40 to 125
WSON (NGS) 8 7.5 mm² (3 mm × 2.5 mm) TO-263 (KTT) 5 154.8384 mm² (10.16 mm × 15.24 mm) TO-263 (NDQ) 5 142.3416 mm² (10.16 mm × 14.01 mm)
  • 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 1.5 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 Pin (LP38502)
  • 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 1.5 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 Pin (LP38502)

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 LP38500 and LP38502 series of LDOs operates 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 LP38500-ADJ and LP38502-ADJ have low quiescent currents that changes little with load current.

  • GND Pin Current: Typically 2 mA at 1.5-A load current.
  • Disable Mode: Typically 25-nA quiescent current when the EN pin is pulled low. (LP38502-ADJ)
  • 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 LP38500 and LP38502 series of LDOs operates 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 LP38500-ADJ and LP38502-ADJ have low quiescent currents that changes little with load current.

  • GND Pin Current: Typically 2 mA at 1.5-A load current.
  • Disable Mode: Typically 25-nA quiescent current when the EN pin is pulled low. (LP38502-ADJ)
  • 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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Technical documentation

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Top documentation Type Title Format options Date
* Data sheet LP3850x-ADJ, LP3850xA-ADJ 1.5-A Flexcap Low-Dropout Linear Regulator for 2.7-V to 5.5-V Inputs datasheet (Rev. H) PDF | HTML Sep 22, 2015
Application note AN-2219 Precision Current Limiting with the LMP8646 and LP38501 (Rev. A) Apr 24, 2013

Design & development

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Evaluation board

LP38502SD-ADJEV — 1.5A FlexCap Low Dropout Linear Regulator for 2.7V to 5.5V Inputs Evaluation Board (LLP8)

This Evaluation Board highlights the LP38502SD-ADJ, a 1.5A Low-Dropout (LDO) linear regulator in the LLP-8 package which has an adjustable output voltage (set by external resistors).

Changing the Output Voltage

The resistors R1 and R2 set the output voltage. The equation to determine output voltage (...)

User guide: PDF
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Simulation model

LP38502-ADJ PSpice Transient Model

SLVMAL9.ZIP (50 KB) - PSpice model
Supported products & hardware
Simulation model

LP38502_ADJ Unencrypted PSpice Transient Model

SNVMAB3.ZIP (1 KB) - PSpice model
Supported products & hardware
Package Pins CAD symbols, footprints & 3D models
WSON (NGS) 8 Ultra Librarian
TO-263 (KTT) 5 Ultra Librarian
TO-263 (NDQ) 5 Ultra Librarian
TI's Standard Terms and Conditions for Evaluation Items apply.

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