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LDO Regulator Pos 3.8V to 14V 3A 6-Pin(5+Tab) DDPAK


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  • Part Number : LT1529CQ

  • Package/Case : DDPAK-5

  • Brands : ADI

  • Components Categories : Voltage Regulators & Voltage ControllersLDO Voltage Regulators

  • Datesheet : LT1529CQ DataSheet (PDF)

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Overview of LT1529CQ

The LT1529CQ is a high-performance low-dropout voltage regulator designed to provide a stable and precisely regulated output voltage. This regulator is part of the LT1529 family, known for its low dropout voltage, low ground current, and high output voltage accuracy, making it a reliable choice for a wide range of power supply applications.


Note: The pin configuration below is a general representation. Refer to the specific datasheet for precise details.

  • IN (Pin 1): Input voltage.
  • GND (Pin 2): Ground.
  • OUT (Pin 3): Regulated output voltage.

Circuit Diagram

Incorporate a circuit diagram that illustrates the connections and operation of the LT1529CQ voltage regulator for a more visual representation.

The circuit diagram above illustrates a typical application of the LT1529CQ voltage regulator. External components, such as capacitors, are connected to achieve stable and regulated power output.

Key Features

  • Low Dropout Voltage: The LT1529CQ features a low dropout voltage, ensuring efficient operation even when the input voltage is close to the desired output voltage.
  • Low Ground Current: With low ground current characteristics, this regulator minimizes power consumption, making it suitable for battery-powered applications.
  • High Output Voltage Accuracy: The device offers high output voltage accuracy, ensuring the regulated output meets specified levels under various operating conditions.
  • Current Limiting and Thermal Shutdown: Equipped with current limiting and thermal shutdown protection features, the LT1529CQ enhances its reliability and protection against overcurrent and excessive temperature conditions.

Note: For detailed technical specifications, please refer to the LT1529CQ datasheet.


  • Power Supply Regulation: Ideal for regulating power supplies in various electronic devices.
  • Battery-Powered Devices: Suitable for battery-operated devices where efficient power management is crucial.
  • Precision Voltage Reference: Used as a stable voltage reference in precision analog circuits.
  • Embedded Systems: Applied in embedded systems for voltage regulation and stabilization.


The LT1529CQ functions as a low-dropout voltage regulator, maintaining a stable and precisely controlled output voltage. Its low dropout voltage, low ground current, and protection features make it suitable for applications demanding reliable power regulation.

Usage Guide

  • Input Power Connection: Connect the input power source to the IN pin.
  • Output Connection: Connect the load to the OUT pin.
  • External Components: Connect external capacitors as per the datasheet recommendations for stable operation.


For similar functionalities, consider these alternatives to the LT1529CQ:

LT1529-3.3: A variant with a different output voltage.

Frequently Asked Questions

Q: What is the dropout voltage of the LT1529CQ?
A: Refer to the datasheet for specified dropout voltage values under recommended operating conditions.

Q: Can the LT1529CQ be used in automotive applications?
A: It is recommended to consult the datasheet and specific application requirements for detailed information on the device's suitability for automotive applications.


The followings are basic parameters of the part selected concerning the characteristics of the part and categories it belongs to.

Source Content uid LT1529CQ Rohs Code No
Part Life Cycle Code Transferred Ihs Manufacturer LINEAR TECHNOLOGY CORP
Part Package Code D2PAK Package Description TO-263, SMSIP5H,.6,67TB
Pin Count 5 Manufacturer Package Code Q
Reach Compliance Code not_compliant ECCN Code EAR99
HTS Code 8542.39.00.01 Adjustability ADJUSTABLE
Dropout Voltage1-Max 0.95 V Dropout Voltage1-Nom 0.6 V
JESD-30 Code R-PSSO-G5 JESD-609 Code e0
Length 10.2235 mm Line Regulation-Max (%/V) 0.026
Load Regulation-Max(%) 0.82% Moisture Sensitivity Level 1
Number of Functions 1 Number of Outputs 1
Number of Terminals 5 Operating Temperature TJ-Max 125 °C
Operating Temperature TJ-Min Output Current1-Max 3 A
Output Voltage1-Max 14 V Output Voltage1-Min 3.75 V
Package Body Material PLASTIC/EPOXY Package Code TO-263
Package Equivalence Code SMSIP5H,.6,67TB Package Shape RECTANGULAR
Package Style SMALL OUTLINE, HEAT SINK/SLUG Qualification Status Not Qualified
Surface Mount YES Technology BIPOLAR
Terminal Finish TIN LEAD OVER NICKEL Terminal Form GULL WING
Terminal Pitch 1.702 mm Terminal Position SINGLE
Width 8.89 mm Product Category LDO Voltage Regulators
RoHS No&nbsp-RoHS Version Available Package / Case DDPAK-5
Output Voltage 3.8 V to 14 V Output Current 3 A
Polarity Positive Quiescent Current 50 uA
Input Voltage, Min 3.8 V Input Voltage, Max 15 V
PSRR / Ripple Rejection - Typ 62 dB Output Type Adjustable
Minimum Operating Temperature 0 C Maximum Operating Temperature + 125 C
Dropout Voltage 600 mV Series LT1529
Brand Analog Devices Dropout Voltage - Max 950 mV
Height 4.57 mm Ib - Input Bias Current 150 nA
Line Regulation 1.5 mV Load Regulation 12 mV
Operating Supply Current 50 uA Product Linear Regulators
Product Type LDO Voltage Regulators Subcategory PMIC - Power Management ICs
Type Positive Linear Regulator

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