About us Contact Us Submit BOM
RFQs(0)
English
Close Menu
View All

Please refer to the English Version as our Official Version.Return

Europe
France(Français) Germany(Deutsch) Italy(Italia) Russian(русский) Poland(polski) Czech(Čeština) Luxembourg(Lëtzebuergesch) Netherlands(Nederland) Iceland(íslenska) Hungarian(Magyarország) Spain(español) Portugal(Português) Turkey(Türk dili) Bulgaria(Български език) Ukraine(Україна) Greece(Ελλάδα) Israel(עִבְרִית) Sweden(Svenska) Finland(Svenska) Finland(Suomi) Romania(românesc) Moldova(românesc) Slovakia(Slovenská) Denmark(Dansk) Slovenia(Slovenija) Slovenia(Hrvatska) Croatia(Hrvatska) Serbia(Hrvatska) Montenegro(Hrvatska) Bosnia and Herzegovina(Hrvatska) Lithuania(lietuvių) Spain(Português) Switzerland(Deutsch) United Kingdom(English)
Asia/Pacific
Japan(日本語) Korea(한국의) Thailand(ภาษาไทย) Malaysia(Melayu) Singapore(Melayu) Vietnam(Tiếng Việt) Philippines(Pilipino)
Africa, India and Middle East
United Arab Emirates(العربية) Iran(فارسی) Tajikistan(فارسی) India(हिंदी) Madagascar(malaɡasʲ)
South America / Oceania
New Zealand(Maori) Brazil(Português) Angola(Português) Mozambique(Português)
North America
United States(English) Canada(English) Haiti(Ayiti) Mexico(español)
HomeProductsIntegrated Circuits (ICs)PMIC - Voltage Regulators - LinearLT1117CM#PBF
LT1117CM#PBF Image
LT1117CM#PBF Image - 1
Image may be representation.
See specifications for product details.
Share
 Favorite
EXPRESS OPTION
Payment method

LT1117CM#PBF - Analog Devices Inc.

Manufacturer Part Number
LT1117CM#PBF
Manufacturer
Analog Devices, Inc.
Allelco Part Number
32D-LT1117CM#PBF
Warranty
1 Year Allelco Warranty - Find out more
Stock Status:
9,105 pcs available, New & Original
Parts Description
IC REG LIN POS ADJ 800MA 3DDPAK
Package
3-DDPAK
Data sheet
LT1117CM#PBF.pdf

Environmental Information

Material Declaration LT1117CM#PBF.pdf

PCN Assembly/Origin

2.73KHz.pdf

PCN Design/Specification

Cylindrical Battery Holders.pdf
RoHs Status
ROHS3 Compliant
Compare
Our certification
In stock: 9105

Required fields are indicated by an asterisk (*)
Please send RFQ, we will respond immediately.

Quantity

Specifications

LT1117CM#PBF Tech Specifications
Analog Devices Inc. - LT1117CM#PBF technical specifications, attributes, parameters and parts with similar specifications to Analog Devices Inc. - LT1117CM#PBF

Product Attribute Attribute Value
Manufacturer Analog Devices, Inc.
Voltage Dropout (Max) 1.2V @ 800mA
Voltage - Output (Min/Fixed) 1.25V
Voltage - Output (Max) 13.8V
Voltage - Input (Max) 15V
Supplier Device Package 3-DDPAK
Series -
Protection Features Over Temperature
Package / Case TO-263-4, D²Pak (3 Leads + Tab), TO-263AA
Package Tube
Product Attribute Attribute Value
PSRR 75dB (120Hz)
Output Type Adjustable
Output Configuration Positive
Operating Temperature 0°C ~ 125°C
Number of Regulators 1
Mounting Type Surface Mount
Current - Output 800mA
Control Features -
Base Product Number LT1117

Environmental & Export Classifications

ATTRIBUTE DESCRIPTION
RoHs Status ROHS3 Compliant
Moisture Sensitivity Level (MSL) 1 (Unlimited)
REACH Status REACH Unaffected
ECCN EAR99
HTSUS 8542.39.0001

Parts Introduction

LT1117CM#PBF Image
LT1117CM#PBF (1)

Manufacturer Part Number

LT1117CM#PBF

Manufacturer

Analog Devices

Introduction

Low drop-out voltage regulator for power management applications

Product Features and Performance

Adjustable output voltage from 1.25V to 13.8V

Up to 800mA output current

Power supply rejection ratio (PSRR) of 75dB at 120Hz

Low maximum voltage dropout of 1.2V at 800mA load

Positive output configuration

Product Advantages

Stable with output capacitors as low as 10μF

Over temperature protection for device safety

Wide operating temperature range from 0°C to 125°C

Key Technical Parameters

Input voltage up to 15V

Minimum output voltage of 1.25V

Maximum output voltage of 13.8V

Output current capability of 800mA

Maximum voltage dropout of 1.2V @ 800mA load

Quality and Safety Features

Built-in over temperature protection

Compatibility

Surface mount compatible

TO-263-4, D2PAK packaging compatible with various PCB designs

Application Areas

Consumer electronics

Telecommunication

Computer systems

Instrumentation

Automotive electronics

Product Lifecycle

Active status product

Continual manufacturing with no immediate end-of-life or discontinuation insight

Support and availability of replacements and upgrades ensured

Several Key Reasons to Choose This Product

Efficient low dropout performance suitable for linear regulation requirements

High output voltage accuracy for sensitive electronics

Robust thermal performance enhances device reliability and longevity

Broad compatibility with various surface mount technologies aids in flexible design integration

Reliable operation within a wide range of ambient temperatures, fitting for diverse environments and applications

Frequently Asked Questions(FAQ)

How does the LT1117CM#PBF perform in terms of dropout voltage under high load conditions, and what are the implications for battery-powered applications?
The LT1117CM#PBF exhibits a maximum dropout voltage of 1.2V at an output current of 800mA, meaning that when the input-to-output differential drops below this threshold, regulation can no longer be maintained. This characteristic is particularly critical in battery-operated systems where voltage headroom is limited. For example, using a single Li-ion cell (3.7V nominal) with a desired 3.3V output would require a minimum input voltage of 4.5V just to sustain full-load operation—something unachievable without boosting or multiple cells. In such cases, designers must either accept reduced efficiency near the end of discharge cycles or consider switching regulators like the LT1936 for better performance.
What thermal considerations should be addressed when operating the LT1117CM#PBF continuously at 800mA in ambient temperatures up to 70°C?
Continuous conduction of 800mA through the LT1117CM#PBF generates significant power dissipation, calculated as \( P = (V_{IN} - V_{OUT}) \times I_{LOAD} \). Assuming a 5V input and 3.3V output, dissipation reaches approximately 1.36W. Without a heatsink, the junction temperature rises well above 125°C—the absolute maximum rating—due to the thermal resistance of the TO-263 package (typically ~20°C/W from junction to ambient). Even with minimal airflow, derating curves indicate that sustained loads near 800mA may exceed safe operating limits unless the PCB provides substantial copper area on layers adjacent to the tab. Proper layout and thermal vias are essential to prevent premature thermal shutdown or reliability degradation.
How does the LT1117CM#PBF compare to fixed-output variants like the LT1117S3.3#PBF in terms of component count and design flexibility?
While fixed-output versions such as the LT1117S3.3#PBF eliminate the need for external resistors to set the output voltage, the adjustable LT1117CM#PBF offers greater flexibility by supporting output voltages from 1.25V to 13.8V. This makes it suitable for applications requiring non-standard rails or future reconfigurability. However, this comes at the cost of two additional resistors (typically a 1.2kΩ feedback resistor and a variable resistor), increasing BOM count slightly and introducing minor stability considerations due to resistor tolerance effects on loop compensation. For most standard digital logic voltages (e.g., 3.3V, 5V), the fixed-output variant is preferred due to simplicity and lower noise susceptibility.
Is the LT1117CM#PBF suitable for use with high-impedance sensor circuits that demand ultra-low output noise?
The LT1117CM#PBF has a PSRR of 75dB at 120Hz, which is adequate for many analog conditioning circuits but not sufficient for precision sensor front ends requiring sub-millivolt ripple. At higher frequencies, PSRR degrades further, making capacitive filtering more critical. In such applications, adding low-ESR ceramic capacitors (≥10µF) close to the load helps mitigate ripple, but the inherent noise floor of the linear regulator may still interfere with sensitive measurements. Designers often pair the LT1117CM#PBF with post-regulator LDOs (e.g., LT3045) or employ active filtering stages to meet stringent noise budgets.
What protection mechanisms are embedded within the LT1117CM#PBF, and how do they influence system-level fault tolerance?
The LT1117CM#PBF includes over-temperature protection that disables the output when internal junction temperature exceeds approximately 150°C, automatically recovering once cooled below a lower threshold. This prevents catastrophic failure during thermal overloads but does not offer reverse polarity, overvoltage, or short-circuit protection beyond basic current limiting implied by its linear architecture. While robust against internal thermal runaway, system-level robustness requires additional safeguards—such as fuses or crowbars—when inputs may experience transient surges or accidental reverse connections.
Can the LT1117CM#PBF operate reliably with input voltages approaching its maximum rating of 15V in automotive environments?
Yes, the LT1117CM#PBF is rated for continuous operation up to 15V, aligning with ISO 7637 transient immunity requirements in many automotive subsystems. However, prolonged exposure to 15V input increases quiescent current slightly and accelerates long-term reliability concerns such as gate oxide stress in internal pass elements. In practice, most automotive designs limit steady-state input to ≤12V for margin, reserving the full range for brief transients. Ensuring adequate bulk capacitance (>100µF) and transient clamping diodes enhances resilience without compromising regulation integrity.
How does the LT1117CM#PBF handle startup behavior when powered from a capacitor-isolated supply, and what precautions apply?
During startup from an isolated-capacitor source, the absence of immediate current path through the load can cause the input capacitor to charge too slowly, leading to excessive inrush current into the regulator’s input pin. Although the LT1117CM#PBF itself lacks dedicated soft-start circuitry, proper decoupling (e.g., a 10µF tantalum or ceramic at input plus 1µF bypass) combined with a small series resistor (1–10Ω) limits surge currents. Additionally, enabling downstream loads gradually via enable pins or sequencing ICs improves reliability in multi-rail systems.
What impact does output capacitance have on stability when using the LT1117CM#PBF with non-polarized electrolytic capacitors?
The LT1117CM#PBF requires a minimum output capacitance of 10µF for stable operation across its entire voltage range. Using low-quality electrolytic capacitors with high ESR can degrade phase margin, potentially causing oscillations or poor transient response. Tantalum or X7R/X5R multilayer ceramic capacitors (MLCCs) are strongly recommended due to their stable ESR and temperature characteristics. If only polarized caps are available, ensure correct polarity and verify transient performance under load steps—failure to do so may result in unstable output or premature latch-up.
In what scenarios would the LT1117CM#PBF be preferred over a switching regulator despite lower efficiency?
The LT1117CM#PBF excels in noise-sensitive analog subsystems, medical devices, or communication modules where electromagnetic interference (EMI) must be minimized. Its linear nature avoids high-frequency switching artifacts that plague buck converters, even with proper layout. Furthermore, simplicity—fewer components, predictable behavior, and absence of control-loop complexity—makes it ideal for space-constrained, low-power peripherals or backup power paths. When the input-output differential is small (<2V) and efficiency is secondary to signal fidelity, the LT1117CM#PBF becomes a compelling choice over alternatives like the LT8610 or LM2678.
How does the Moisture Sensitivity Level (MSL) rating of MSL 1 for the LT1117CM#PBF affect assembly process planning?
With an MSL rating of 1, the LT1117CM#PBF is classified as "non-hazardous" regarding moisture absorption and requires no special baking prior to reflow soldering. This simplifies manufacturing logistics and reduces lead time constraints compared to MSL 3–4 parts, making it highly suitable for high-volume production environments where quick turnaround is essential. No bake-out is needed before IR/Convection reflow, though standard IPC Class 2 or 3 profiles apply. This attribute supports streamlined SMT workflows without compromising reliability.

Parts with Similar Specifications

The three parts on the right have similar specifications to Analog Devices Inc. LT1117CM#PBF

Product Attribute LT1117CM-2.85#TRPBF LT1117CM-2.85#PBF LT1117CM-3.3#TRPBF LT1117CM-3.3#PBF
Part Number LT1117CM-2.85#TRPBF LT1117CM-2.85#PBF LT1117CM-3.3#TRPBF LT1117CM-3.3#PBF
Manufacturer Analog Devices Inc. Analog Devices Inc. Analog Devices Inc. Analog Devices Inc.
Control Features - - - -
PSRR - - - -
Package - Tape & Reel (TR) Tube Tape & Reel (TR)
Supplier Device Package - 196-NFBGA (12x12) 16-PDIP 64-VQFN (9x9)
Base Product Number - DAC34H84 MAX500 ADS62P42
Voltage Dropout (Max) - - - -
Series - - - -
Protection Features - - - -
Package / Case - 196-LFBGA 16-DIP (0.300', 7.62mm) 64-VFQFN Exposed Pad
Mounting Type - Surface Mount Through Hole Surface Mount
Output Configuration - - - -
Number of Regulators - - - -
Operating Temperature - -40°C ~ 85°C 0°C ~ 70°C -40°C ~ 85°C
Output Type - Current - Unbuffered Voltage - Buffered -
Voltage - Output (Max) - - - -
Current - Output - - - -
Voltage - Input (Max) - - - -
Voltage - Output (Min/Fixed) - - - -

LT1117CM#PBF Datasheet PDF

Download LT1117CM#PBF pdf datasheets and Analog Devices Inc. documentation for LT1117CM#PBF - Analog Devices Inc..

Environmental Information
Material Declaration LT1117CM#PBF.pdf
HTML Datasheet
LT1117(-2.8, 3.3, 5) Datasheet.pdf
PCN Assembly/Origin
2.73KHz.pdf
PCN Design/Specification
Cylindrical Battery Holders.pdf

Customers Also Interested in

Recommended Products

Customer Reviews

Evaluation: 10 Articles

  • Nath***rooks
    Jun 11, 2026

    Installed this power component in a converter board. Output remained stable under different load conditions and thermal performance was better than expected.

  • Dani***alkerTech
    Jun 1, 2026

    Product works, but setup took more effort than expected. Once configured the MCU ran reliably, although documentation support felt older compared with newer platforms. Fine for maintenance projects.

  • Yuki***aka88
    May 26, 2026

    信号通信プロジェクトでこのRS-485トランシーバーを使用しました。設置は簡単で、長距離ケーブルでも通信は安定していました。消費電力も、以前使用していたものより低くなっています。

  • Stev***aker
    May 20, 2026

    Solid diode for power rectification. Works well in switching circuits.

  • Bran***Lewis
    May 11, 2026

    Compact FPGA with good performance. Suitable for basic signal processing tasks.

  • Oliv***arris
    May 7, 2026

    Reliable I/O expander. Works well in embedded control applications.

  • Jess***Jones
    Apr 17, 2026

    It offers good value for the price, and the specifications match the description. I’ve been using it for two days with no issues, and I’ll definitely buy it again if I need it in the future.

  • Mich***Smith
    Apr 17, 2026

    Shipping was on time, the component pins are neatly aligned, and I tested 10 of them with a multimeter—all readings were within the specified range. Highly recommended.

  • Aman***arris
    Apr 3, 2026

    It was great—the entire process, from placing the order to receiving the package, went very smoothly. The components were consistent, the price was fair, and I had a very pleasant shopping experience.

  • Mike***nch
    Apr 3, 2026

    Better than expected! The resistance and capacitance readings were spot-on, and it passed the test on the first try. The service was reliable, and the packaging was thoughtful—I highly recommend it.

Write a Review

Your Email address will not be published.

Shipment

Delivery Time

In-stock items can be shipped within 24 hours. Some parts will be arranged for delivery within 1-2 days from the date all items arrive at our warehouse. And Allelco ships order once a day at about 17:00, except Sunday. Once the goods are shipped, the estimated delivery time depends on the shipping methods and Delivery destination. The table below shows are the logistic time for some common countries.

Delivery Cost

  1. Use your express account for shipment if you have one.
  2. Use our account for the shipment. Refer to the table below for the approximate charges.
(Different time frame / countries / package size has different price.)

Delivery Method

  1. Global Common Shipment by DHL / UPS / FedEx / TNT / EMS / SF we support.
  2. Others more shipping ways, please get in touch with your customer manager.

Common Countries Logistic Time Reference
Region Country Logistic Time(Day)
America United States 5
Brazil 7
Europe Germany 5
United Kingdom 4
Italy 5
Oceania Australia 6
New Zealand 5
Asia India 4
Japan 4
Middle East Israel 6
DHL & FedEx Shipment Charges Reference
Shipment charges(KG) Reference DHL(USD$)
0.00kg-1.00kg USD$30.00 - USD$60.00
1.00kg-2.00kg USD$40.00 - USD$80.00
2.00kg-3.00kg USD$50.00 - USD$100.00
Note:
The above table is for reference only. There may have some data bias for the uncontrollable factors.
Contact us if you have any questions.
  • QC (Quality Warranty)
  • Payment Support
  • Packaging
  • Certifications & Memberships

QC (Quality Warranty)

Allelco is committed to exceeding customer expectations through customer service excellence, order accuracy, and on-time delivery.
This is achieved through our commitment to the continual improvement of our processes, services, and products.


Strict quality inspection builds a solid foundation for electronic component quality.
  1. Visual inspection
  2. Performance testing and reliability verification
  3. Standardized full-process testing
  4. Precise control of every parameter
We eliminate defective components and ensure the stable operation of electronic devices through professional quality standards.
Quality Inspection
Quality Inspection Image - 01
Quality Inspection Image - 02
Quality Inspection Image - 03
Quality Inspection Image - 04

Payment Support

The payment method can be chosen from the methods shown below: Wire Transfer (T/T, Bank Transfer), Western Union, Credit card, PayPal.
  • HKBea
  • Paypal
  • MasterCard
  • Western-Union
  • VISA
Stable Delivery, Sincere Partnership — Your Faithful Supply Chain Partner
  • Efficient Supply Management
  • Cost-Saving Procurement
  • Fast Sourcing & Delivery
Contact us if you have any questions.

Packaging

Electrostatic Discharge Protection and Handling

All electrostatic-sensitive components are handled in accordance with electrostatic discharge control procedures. The products are hermetically sealed in anti-static safe packaging to prevent electrostatic damage. Appropriate labeling is also applied for identification and traceability. This ensures product integrity during storage, handling and transportation.


ESD

Certifications & Memberships

Third-party certified, strict quality control. Our certification
  • ISO 9001: 2015
  • ISO 13485: 2016
  • ISO 14001: 2015
  • ISO 28000: 2007
  • ISO 45001: 2018
  • GB/T 27922-2011
  • SMTA
  • IPC
  • ESD
  • PSMA
LT1117CM#PBF Image

LT1117CM#PBF

Analog Devices Inc.
32D-LT1117CM#PBF

Want a better price? Add to Cart and Submit RFQ now, we'll contact you immediately.

Allelco
About Us
History
Certifications
Recruitment
Policies
Terms & Conditions
Privacy Policy
Cookie Policy
Services
Order Tracking
Return & Replacement
Frequently Asked Questions
Contact Us
Order
Shipping & Delivering
Payment Methods
My Account
The BlogsHot PartsChange LanguageNewsSite map
Contact Us
Headquarters Address:
Room C 13/F Harvard Commercial Building
105-111 Thomson Road Wan Chai
HongKong
Service Tel: +852-91464856
Service Email: info@allelco.com
Follow us
Copyright © 2012-2025 AllelcoElec.com. All rights reserved.
0 RFQ
Shopping cart (0 Items)
It is empty.
Submit RFQ
Compare List (0 Items)
It is empty.
Feedback

Your feedback matters! At Allelco, we value the user experience and strive to improve it constantly.
Please share your comments with us via our feedback form, and we'll respond promptly.
Thank you for choosing Allelco.

Subject
E-mail
Comments
Captcha
Drag or click to upload file
Upload File
types: .xls, .xlsx, .doc, .docx, .jpg, .png and .pdf.
Max file size: 10MB