Power Management LDO Linear Regulators Positive Linear Regulators (LDO)

LT3021/LT3021-1.2/ LT3021-1.5/LT3021-1.8 - 500mA, Low Voltage, Very Low Dropout Linear Regulator

Features

  • VIN Range: 0.9V to 10V
  • Dropout Voltage: 160mV Typical
  • Output Current: 500mA
  • Adjustable Output (VREF = VOUT(MIN) = 200mV)
  • Fixed Output Voltages: 1.2V, 1.5V, 1.8V
  • Stable with Low ESR, Ceramic Output Capacitors (3.3µF Minimum)
  • 0.2% Load Regulation from 0mA to 500mA
  • Quiescent Current: 120µA (Typ)
  • 3µA Typical Quiescent Current in Shutdown
  • Current Limit Protection
  • Reverse-Battery Protection
  • No Reverse Current
  • Thermal Limiting with Hysteresis
  • 16-Pin DFN (5mm × 5mm) and 8-Lead SO Packages

Typical Application

LT3021 Typical Application
LT3021 Typical Application

Description

The LT3021 is a very low dropout voltage (VLDO™) linear regulator that operates from input supplies down to 0.9V. This device supplies 500mA of output current with a typical dropout voltage of 160mV. The LT3021 is ideal for low input voltage to low output voltage applications, providing comparable electrical efficiency to that of a switching regulator.

The LT3021 regulator optimizes stability and transient response with low ESR, ceramic output capacitors as small as 3.3µF. Other LT3021 features include 0.05% typical line regulation and 0.2% typical load regulation. In shutdown, quiescent current typically drops to 3µA.

Internal protection circuitry includes reverse-battery protection, current limiting, thermal limiting with hysteresis, and reverse-current protection. The LT3021 is available as an adjustable output device with an output range down to the 200mV reference. Three fixed output voltages, 1.2V, 1.5V and 1.8V, are also available.

The LT3021 regulator is available in the low profile (0.75mm) 16-pin (5mm × 5mm) DFN package with exposed pad and the 8-lead SO package.

Packaging

For complete and up to date package information and drawings, please refer to our packaging page

DFN-16, SO-8

LT3021 Package Drawing
LT3021 Package Drawing

Order Info

Package Variations and Pricing

Part Number Package Pins Temp Price (1-99) Price (1k)* RoHS Data
LT3021EDH DFN 16 E $3.21 $2.25 View
LT3021EDH#PBF DFN 16 E $3.21 $2.25 View
LT3021EDH#TR DFN 16 E $2.35 View
LT3021EDH#TRPBF DFN 16 E $2.35 View
LT3021EDH-1.2 DFN 16 E $3.21 $2.25 View
LT3021EDH-1.2#PBF DFN 16 E $3.21 $2.25 View
LT3021EDH-1.2#TR DFN 16 E $2.35 View
LT3021EDH-1.2#TRPBF DFN 16 E $2.35 View
LT3021EDH-1.5 DFN 16 E $3.21 $2.25 View
LT3021EDH-1.5#PBF DFN 16 E $3.21 $2.25 View
LT3021EDH-1.5#TR DFN 16 E $2.35 View
LT3021EDH-1.5#TRPBF DFN 16 E $2.35 View
LT3021EDH-1.8 DFN 16 E $3.21 $2.25 View
LT3021EDH-1.8#PBF DFN 16 E $3.21 $2.25 View
LT3021EDH-1.8#TR DFN 16 E $2.35 View
LT3021EDH-1.8#TRPBF DFN 16 E $2.35 View
LT3021ES8 SO 8 E $3.21 $2.25 View
LT3021ES8#PBF SO 8 E $3.21 $2.25 View
LT3021ES8#TR SO 8 E $2.31 View
LT3021ES8#TRPBF SO 8 E $2.31 View
LT3021ES8-1.2 SO 8 E $3.21 $2.25 View
LT3021ES8-1.2#PBF SO 8 E $3.21 $2.25 View
LT3021ES8-1.2#TR SO 8 E $2.31 View
LT3021ES8-1.2#TRPBF SO 8 E $2.31 View
LT3021ES8-1.5 SO 8 E $3.21 $2.25 View
LT3021ES8-1.5#PBF SO 8 E $3.21 $2.25 View
LT3021ES8-1.5#TR SO 8 E $2.31 View
LT3021ES8-1.5#TRPBF SO 8 E $2.31 View
LT3021ES8-1.8 SO 8 E $3.21 $2.25 View
LT3021ES8-1.8#PBF SO 8 E $3.21 $2.25 View
LT3021ES8-1.8#TR SO 8 E $2.31 View
LT3021ES8-1.8#TRPBF SO 8 E $2.31 View
LT3021IS8-1.8#PBF SO 8 I $3.54 $2.48 View
LT3021IS8-1.8#TRPBF SO 8 I $2.54 View
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* The USA list pricing shown is for BUDGETARY USE ONLY, shown in United States dollars (FOB USA per unit for the stated volume), and is subject to change. International prices may differ due to local duties, taxes, fees and exchange rates. For volume-specific price or delivery quotes, please contact your local Linear Technology sales office or authorized distributor.

Demo Boards

Linear Technology offers many demo boards free of charge to qualified customers. Contact your local sales office or distributor to inquire about a demo board. Certain demo boards are also available for sale via credit card on this website. Demo boards are for evaluation purposes only. It remains the customer’s responsibility to verify proper and reliable operation in the actual end application.

Part Number Description Price Documentation
DC865A LT3021EDH | Low Voltage LDO Linear Regulator Contact Factory
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Click here to view our complete list of demo boards

Applications

  • Low Current Regulators
  • Battery-Powered Systems
  • Cellular Phones
  • Pagers
  • Wireless Modems

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LTspice IV is a powerful, fast and free simulation tool, schematic capture and waveform viewer with enhancements and models for improving the simulation of switching regulators. To download LTspice IV and other FREE simulation tools, please visit our Design Simulation page.

Related models available in LTspice IV
LT3021-1.2
LT3021-1.5
LT3021-1.8
LT3021

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