Products > Integrated Circuits (ICs) > LT1521CMS8

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LDO Regulator Pos 3.8V to 20V 0.3A

Manufacturer : Analog Devices, Inc
Package/Case : MSOP-8
Product Categories : Linear (LDO)
Datasheet: LT1521CMS8 Datasheet (PDF)
RoHs Status: Lead free / RoHS Compliant
Marking Code: LTEZ
In-stock: 73


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LT1521CMS8 Product Details

The LT1521/LT1521-3/LT1521-3.3/LT1521-5 are low dropout regulators with micropower quiescent current and shutdown. These devices are capable of supplying 300mA of output current with a dropout voltage of 0.5V.Designed for use in battery-powered systems, the low quiescent current, 12uA operating and 6uA in shutdown, makes 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 LT1521/LT1521-3/LT1521-3.3/LT1521-5 include the ability to operate with very small output capacitors. They are stable with only 1.5uF on the output while most older devices require between 10uF and 100uF for stability. Small ceramic capacitors can be used,enhancing manufacturability. 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 LT1521CMS8 series ideal for backup power situations where the output is held high and the input is low or reversed. Under these conditions only 5uA will flow from the output pin to ground.



  • Dropout Voltage: 0.5V
  • Output Current: 300mA
  • Quiescent Current: 12µA
  • No Protection Diodes Needed
  • Adjustable Output from 3.8V to 20V
  • Fixed Output Voltages: 3V, 3.3V, 5V
  • Controlled Quiescent Current in Dropout
  • Shutdown IQ = 6µA
  • Reverse Battery Protection
  • No Reverse Current
  • Thermal Limiting


  • Low Current Regulator
  • Regulator for Battery-Powered Systems
  • Post Regulator for Switching Supplies

LT1521CMS8 Block Diagram
(Picture: Diagram)

Technical Parameters

  • Number of Outputs
  • 1
  • Vinmin | V
  • 4.3
  • Vinmax | V
  • 20
  • Output Currenttyp | A
  • 300m
  • Output Current 2typ | A
  • -
  • Output Voltage
  • 3, 3.3, 5, Adj
  • RMS Noisetyp | V
  • -
  • Isupplytyp | A
  • 12µ
  • Dropout Voltagetyp | V
  • 500m
  • Features
  • Shutdown

LT1521CMS8 Datasheet

  • LT1521 Technical Documentation/Data sheet

LT1521CMS8 Related Products

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1.The electronic components you purchase include 365 Days Warranty, We guarantee product quality.

2.If some of the items you received aren't of perfect quality, we would resiponsibly arrange your refund or replacement. But the items must remain their orginal condition.


Q: How does Jotrin guarantee that LT1521CMS8 is the original manufacturer or agent of ADI?
We have a professional business development department to strictly test and verify the qualifications of ADI original manufacturers and agents. All ADI suppliers must pass the qualification review before they can publish their LT1521CMS8 devices; we pay more attention to the channels and quality of LT1521CMS8 products than any other customer. We strictly implement supplier audits, so you can purchase with confidence.
Q: How to find the detailed information of LT1521CMS8 chips? Including ADI original factory information, Linear (LDO) application, LT1521CMS8 pictures?
You can use Jotrin's intelligent search engine, or filter by LDO Linear Regulators ; Positive Linear Regulators (LDO) category, or find it through Analog Devices, Inc Information page.
Q: Are the ADI's LT1521CMS8 price and stock displayed on the platform accurate?
The ADI's inventory fluctuates greatly and cannot be updated in time, it will be updated periodically within 24 hours. After submitting an order for LT1521CMS8, it is recommended to confirm the order with Jotrin salesperson or online customer service before payment.
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Note: It may take up to 24 hours before carriers will display tracking information. In normal conditions, Express delivery needs 3-5 days, Registered Mail needs 25-60 days.
Q: What is the process for returns or replacement of LT1521CMS8?
All goods will implement Pre-Shipment Inspection (PSI), selected at random from all batches of your order to do a systematic inspection before arranging the shipment. If there is something wrong with the LT1521CMS8 we delivered, we will accept the replacement or return of the LT1521CMS8 only when all of the below conditions are fulfilled:
(1)Such as a deficiency in quantity, delivery of wrong items, and apparent external defects (breakage and rust, etc.), and we acknowledge such problems.
(2)We are informed of the defect described above within 90 days after the delivery of LT1521CMS8.
(3)The LT1521CMS8 is unused and only in the original unpacked packaging.
Two processes to return the products:
(1)Inform us within 90 days
(2)Obtain Requesting Return Authorizations
More details about return electronic components please see our Return & Change Policy.
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Analog Devices, Inc

Analog Devices, Inc. was founded by two MIT graduates, Ray Stata and Matthew Lorber in 1965. The same year, the company released its first product, the model 101 op amp, which was a hockey-puck sized module used in test and measurement equipment. In 1967, the company published the first issue of its...
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