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LT1529 - 3A Low Dropout Regulators with Micropower Quiescent Current and Shutdown; Package: DD PAK; Pins: 5; Temperature Range: 0°C to 70°C


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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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Technical Attributes

DESCRIPTIONThe LT ®1529/LT1529-3.3/LT1529-5 are 3A low dropout regulators with micropower quiescent current and shutdown. The devices are capable of supplying 3A of output current with a dropout voltage of 0.6V. Designed for use in battery-powered systems, the low quiescent current, 50µA operating and 16µA in shutdown, make them an ideal choice. The quiescent current is well controlled; it does not rise in dropout as it does with many other low dropout PNP regulators.Other features of the LT1529 /LT1529-3.3/LT1529-5 include the ability to operate with small output capacitors. They are stable with only 3.3µF on the output while most older devices require between 10µF and 100µF for stability. Small ceramic capacitors can be used, enhancing manufacturabiltiy. Also the input may be connected to voltages lower than the output voltage, including negative voltages, without reverse current flow from output to input. This makes the LT1529/LT1529-3.3/LT1529-5 ideal for backup power situations where the output is held high and the input is at ground or reversed. Under these conditions, only 16µA will flow from the OUTPUT pin to ground. The devices are available in 5-lead TO-220 and 5-lead DD packages.FEATURES■ Dropout Voltage: 0.6V at IOUT = 3A■ Output Current: 3A■ Quiescent Current: 50µA■ No Protection Diodes Needed■ Adjustable Output from 3.8V to 14V■ 3.3V and 5V Fixed Output Voltages■ Controlled Quiescent Current in Dropout■ Shutdown IQ = 16µA■ Stable with 3.3µF Output Capacitor■ Reverse Battery Protection■ No Reverse Current■ Thermal LimitingAPPLICATIONS■ High Efficiency Regulator■ Regulator for Battery-Powered Systems■ Post Regulator for Switching Supplies■ 5V to 3.3V Logic Regulator

Key Features

  • Dropout Voltage: 0.6V at IOUT = 3A
  • Output Current: 3A
  • Quiescent Current: 50µA
  • No Protection Diodes Needed
  • Adjustable Output from 3.8V to 14V
  • 3.3V and 5V Fixed Output Voltages
  • Controlled Quiescent Current in Dropout
  • Shutdown IQ = 16µA
  • Stable with 3.3µF Output Capacitor
  • Reverse Battery Protection
  • No Reverse Current
  • Thermal Limiting


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

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