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Linear & low-dropout (LDO) regulators

LP38693

ACTIVE

500-mA, 10-V, low-dropout voltage regulator with enable

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Data sheet

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TLV767 ACTIVE Adjustable- and fixed-output, 1-A, 16-V, positive-voltage low-dropout (LDO) linear regulator Higher input voltage range

LP38693

ACTIVE
Data sheet Order now

Product details

Output options Fixed Output Iout (max) (A) 0.5 Vin (max) (V) 10 Vin (min) (V) 2.7 Vout (max) (V) 5 Vout (min) (V) 1.8 Fixed output options (V) 1.8, 2.5, 3.3, 5 Noise (µVrms) 80 Iq (typ) (mA) 0.055 Thermal resistance θJA (°C/W) 51, 69 Rating Catalog Load capacitance (min) (µF) 1 Regulated outputs (#) 1 Features Enable, Foldback Overcurrent protection Accuracy (%) 4 PSRR at 100 KHz (dB) 50 Dropout voltage (Vdo) (typ) (mV) 250 Operating temperature range (°C) -40 to 125
Output options Fixed Output Iout (max) (A) 0.5 Vin (max) (V) 10 Vin (min) (V) 2.7 Vout (max) (V) 5 Vout (min) (V) 1.8 Fixed output options (V) 1.8, 2.5, 3.3, 5 Noise (µVrms) 80 Iq (typ) (mA) 0.055 Thermal resistance θJA (°C/W) 51, 69 Rating Catalog Load capacitance (min) (µF) 1 Regulated outputs (#) 1 Features Enable, Foldback Overcurrent protection Accuracy (%) 4 PSRR at 100 KHz (dB) 50 Dropout voltage (Vdo) (typ) (mV) 250 Operating temperature range (°C) -40 to 125
SOT-223 (NDC) 5 45.24 mm² 6.5 x 6.96 WSON (NGG) 6 9 mm² 3 x 3
  • Wide Input Voltage Range (2.7 V to 10 V)
  • All WSON Options are Available as AEC-Q100 Grade 1
  • 2% Output Accuracy (25°C)
  • Low Dropout Voltage: 250 mV at 500 mA (Typical,
    5 V Out)
  • Precision (Trimmed) Bandgap Reference
  • Ensured Specifications for –40°C to 125°C
  • 1-µA Off-State Quiescent Current
  • Thermal Overload Protection
  • Foldback Current Limiting
  • Ground Pin Current: 55 µA (typical) at full load
  • Enable Pin (LP38693)
  • Wide Input Voltage Range (2.7 V to 10 V)
  • All WSON Options are Available as AEC-Q100 Grade 1
  • 2% Output Accuracy (25°C)
  • Low Dropout Voltage: 250 mV at 500 mA (Typical,
    5 V Out)
  • Precision (Trimmed) Bandgap Reference
  • Ensured Specifications for –40°C to 125°C
  • 1-µA Off-State Quiescent Current
  • Thermal Overload Protection
  • Foldback Current Limiting
  • Ground Pin Current: 55 µA (typical) at full load
  • Enable Pin (LP38693)

The LP3869x low-dropout CMOS linear regulators provide tight output tolerance (2% typical), extremely low dropout voltage (250 mV at 500-mA load current, VOUT = 5 V), and excellent AC performance using ultralow equivalent series resistance (ESR) ceramic output capacitors.

The low thermal resistance of the WSON, SOT-223, and TO-252 packages allow use of the full operating current even in high ambient temperature environments.

The use of a PMOS power transistor means that no DC base-drive current is required to bias it, thus allowing ground pin current to remain below 100 µA regardless of load current, input voltage, or operating temperature.

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

The LP3869x low-dropout CMOS linear regulators provide tight output tolerance (2% typical), extremely low dropout voltage (250 mV at 500-mA load current, VOUT = 5 V), and excellent AC performance using ultralow equivalent series resistance (ESR) ceramic output capacitors.

The low thermal resistance of the WSON, SOT-223, and TO-252 packages allow use of the full operating current even in high ambient temperature environments.

The use of a PMOS power transistor means that no DC base-drive current is required to bias it, thus allowing ground pin current to remain below 100 µA regardless of load current, input voltage, or operating temperature.

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

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Type Title Date
* Data sheet LP3869x/-Q1 500-mA Low-Dropout CMOS Linear Regulators Stable With Ceramic Output Capacitors datasheet (Rev. O) PDF | HTML 02 Dec 2015
Selection guide Low Dropout Regulators Quick Reference Guide (Rev. P) 21 Mar 2018
Technical article How LDOs contribute to power efficiency PDF | HTML 13 May 2016
EVM User's guide AN-1841 LMH1982 Evaluation Board User Guide (Rev. A) 26 Apr 2013
EVM User's guide AN-1757 LP38693SD-ADJ Evaluation Board (Rev. A) 24 Apr 2013

Design & development

For additional terms or required resources, click any title below to view the detail page where available.

Evaluation board

LMG5200POLEVM-10 — LMG5200 GaN 48V to 1V point of load evaluation module

The LMG5200POLEVM-10 EVM is designed to evaluate the LMG5200 GaN power stage and the TPS53632G half-bridge point-of-load controller in a 48V to 1V application.  This EVM implements the 48V-1V converter as a single-stage hard-switched half-bridge with current-doubler rectifier.  The EVM (...)

User guide: PDF
Not available on TI.com
Simulation model

LP38693_3P3 PSpice Transient Model

SNVM588.ZIP (40 KB) - PSpice Model
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Simulation model

LP38693_3P3 Unencrypted PSpice Transient Model

SNVMAA3.ZIP (1 KB) - PSpice Model
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Design guide: PDF
Schematic: PDF
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control loops. It efficiently (...)
Design guide: PDF
Schematic: PDF
Reference designs

PMP22089 — Half-bridge point-of-load converter reference design with GaN technology

This reference design modifies the inboard transformer turns ratio from 5:1 to 3:1 to reduce input the range. The board supports input voltages from 24 V to 32 V and output voltages between 0.5 V to 1.0 V with output currents up to 40 A. This topology efficiently supports the high step-down ratio (...)
Test report: PDF
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OPC UA is an industrial machine-to-machine protocol designed to allow interoperability and communication between all machines connected under Industry 4.0. This reference design demonstrates use of the Matrikon OPC™ OPC UA server development kit (SDK) to allow communications using an OPC UA (...)
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TIDA-00851-LDC0851 — LDC0851 Event Counting Reference Design

An inductive sensing (LDC)-based event counting design providing a robust and low-cost interface for speed measurement and event counting applications.  The solution doesn't require magnets and reliably operates in environments with dirt, moisture or oil that usually pose challenges for (...)
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Schematic: PDF
Package Pins CAD symbols, footprints & 3D models
SOT-223 (NDC) 5 Ultra Librarian
WSON (NGG) 6 Ultra Librarian
TI's Standard Terms and Conditions for Evaluation Items apply.

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