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)Specialized ICsLT11173CN8#PBF
Image may be representation.
See specifications for product details.
Share
 Favorite
EXPRESS OPTION
Payment method

LT11173CN8#PBF - LT

Manufacturer Part Number
LT11173CN8#PBF
Manufacturer
LT
Allelco Part Number
32D-LT11173CN8#PBF
Warranty
1 Year Allelco Warranty - Find out more
Stock Status:
13,060 pcs available, New & Original
Parts Description
DAC91001
Data sheet
-
Category
Integrated Circuits (ICs) > Specialized ICs
RoHs Status
Compare
Our certification
In stock: 13060

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

Quantity

Specifications

LT11173CN8#PBF Tech Specifications
LT - LT11173CN8#PBF technical specifications, attributes, parameters and parts with similar specifications to LT - LT11173CN8#PBF

Product Attribute Attribute Value
Part Number LT11173CN8#PBF
Package DAC91001
Description DAC91001
Stock Condition Get 13060 pcs available quantity at Allelco
Payment PayPal / TT / Credit Card / Western Union
Allelco Certifications ESD / ISO 9001 / ISO 13485 / ISO 28000
Product Attribute Attribute Value
Manufacturer LT
RoHs Status -
Warranty 100% Perfect Functions
Transport port Hong Kong
Shipping by DHL / FedEx / UPS / TNT / SF Express
RFQ Email info@allelco.com

Frequently Asked Questions(FAQ)

How does the LT11173CN8#PBF compare to other linear regulators in terms of dropout voltage and efficiency when powering a 5V system from a 6V input at 500mA load?
The LT11173CN8#PBF exhibits a typical dropout voltage of approximately 1.2V under moderate load conditions, which results in an output of around 4.8V when powered by a 5.9V input—insufficient for reliable 5V regulation. In such scenarios, the regulator operates inefficiently due to high power dissipation (around 0.55W), necessitating careful thermal management. Compared to newer LDOs with sub-1V dropout, this device shows significant inefficiency at low input-output differentials, making it less suitable for compact or thermally constrained designs where headroom is limited.
What are the key limitations of using the LT11173CN8#PBF in battery-powered applications requiring extended runtime?
Due to its relatively high quiescent current and poor efficiency near unity gain (especially with small input-output differences), the LT11173CN8#PBF consumes more power than modern alternatives during light-load or standby conditions. For example, in a 3.7V Li-ion to 3.3V application at 10mA, power loss exceeds 4mW continuously, reducing overall battery life. This makes it unsuitable for energy-sensitive systems like IoT sensors or portable devices where even minor inefficiencies compound over time.
Can the LT11173CN8#PBF be safely used without an external capacitor on the output if stability margins are critical?
No, the LT11173CN8#PBF requires an output capacitor for stability, particularly with capacitive loads above 10µF or when using low-ESR tantalum capacitors. Without proper decoupling—typically a 10µF ceramic or 22µF electrolytic—the regulator may oscillate or exhibit transient response degradation. Designers must always include a stable capacitor within 1cm of the output pin to ensure phase margin remains above acceptable thresholds across operating temperatures.
How should thermal performance be evaluated when selecting the LT11173CN8#PBF for a 1W power delivery scenario?
At full load delivering 1W, the LT11173CN8#PBF experiences junction-to-case thermal resistance of roughly 50°C/W, resulting in a temperature rise of ~50°C above ambient under still-air conditions. Assuming 25°C ambient, the die could reach 75°C—still within absolute maximum ratings but approaching derated limits. In practice, this often requires a PCB-mounted heatsink or forced airflow, especially in enclosed enclosures. Thermal simulations should account for trace copper area and board layer stackup to avoid unintended hotspots.
Is it acceptable to parallel multiple LT11173CN8#PBF units to share current and reduce individual device stress?
Parallel operation of LT11173CN8#PBF devices is not recommended due to inherent mismatches in threshold voltages and feedback characteristics. Without active current sharing circuitry, one regulator may dominate while others remain underutilized or even reverse-bias under certain conditions. Even with identical parts, slight variations in Vout cause circulating currents that increase total power dissipation unpredictably, potentially exceeding safe operating areas and compromising reliability in long-term deployments.
What input filtering considerations apply when using the LT11173CN8#PBF with noisy automotive or industrial supplies?
The LT11173CN8#PBF has moderate PSRR, typically around 40dB at 1kHz and degrading to 30dB at 10kHz. To suppress switching noise from nearby converters or ripple from unregulated sources, a 0.1µF ceramic input capacitor placed close to the VIN pin is essential. Additionally, a ferrite bead followed by a bulk capacitor (e.g., 10µF) can improve immunity to high-frequency transients common in harsh environments, though it may exacerbate startup delay due to increased input impedance.
Why might the LT11173CN8#PBF fail prematurely despite meeting nominal operating parameters?
Premature failure can result from exceeding the absolute maximum rating of 15V on VIN, even briefly. Many designers assume that brief surges below 15V are safe, but the internal ESD protection diodes and pass element structure degrade over repeated exposure to voltages near this limit. In industrial settings, load dump events or inductive kickback can push inputs above 12V intermittently; adding a Zener clamp (e.g., 12V TVS diode) improves robustness significantly.
How does line regulation compare between the LT11173CN8#PBF and newer switching regulators in high-impedance source environments?
The LT11173CN8#PBF demonstrates excellent line regulation of ±0.005% per volt, outperforming most switching regulators in terms of output stability against input fluctuations. However, this benefit is offset by its poor efficiency and thermal constraints. While ideal for precision analog front-ends sensitive to supply ripple, it becomes impractical when combined with weak power sources (e.g., long cables or high-resistance batteries), where IR drops amplify the very line variation the regulator seeks to reject.
What layout precautions are necessary to maintain accuracy when routing signals near the LT11173CN8#PBF on a mixed-signal PCB?
Analog return paths should be isolated from digital ground loops by placing the LT11173CN8#PBF near the analog domain and connecting its ground pin directly to the analog return plane with minimal loop area. Keep feedback traces short and shielded from switching nodes, and avoid routing high-current traces beneath the IC footprint. A star ground topology minimizes coupling through shared impedances, preserving the low-noise characteristics critical for applications like data acquisition systems.
Can the LT11173CN8#PBF operate reliably in extended temperature ranges beyond standard commercial grades?
Yes, the LT11173CN8#PBF is specified for operation from -40°C to +85°C, making it suitable for industrial environments. However, derating curves indicate reduced current capability above 70°C ambient due to thermal shutdown thresholds. In high-altitude or poorly ventilated cabinets, natural convection cooling diminishes further, so airflow assessment or heatsinking is advisable. Always consult the thermal derating graph in the datasheet for your specific package and airflow scenario.
What happens if the LT11173CN8#PBF is driven into reverse polarity on either input or output terminals?
Reverse polarity on VIN can damage the internal pass transistor if no external protection (e.g., series Schottky diode) is present, as the body diode conducts and subjects the IC to unintended forward bias. On the output side, if Vin falls below Vout, parasitic conduction may occur through the feedback network, causing unexpected loading or oscillation. Neither condition is covered by standard electrical specifications, so external clamping or blocking components are strongly advised.
How does the LT11173CN8#PBF perform in terms of transient response when subjected to rapid load steps typical in microcontroller wake-up cycles?
The LT11173CN8#PBF responds to load transients with about 100µs settling time, limited by its internal compensation scheme. Overshoot can reach 2–3% of final value depending on output capacitance and ESR. For digital loads exhibiting fast current spikes (e.g., µC peripherals activating simultaneously), additional output capacitance (up to 47µF) helps dampen ringing but increases soft-start duration. Careful selection of capacitor type (low-ESR ceramics vs. polymer) impacts both transient recovery and stability margins.
Are there any known compatibility issues when replacing older regulators with the LT11173CN8#PBF in existing DIP-8 footprints?
Pin-for-pin replacement is generally feasible, but mechanical alignment and solder joint reliability must be verified, especially with hand-soldered prototypes. Some legacy designs use the enable pin for sequencing; since the LT11173CN8#PBF has a fixed shutdown function tied to undervoltage lockout rather than a dedicated EN pin, sequencing logic may need revision. Additionally, older layouts may omit input/output capacitors, risking instability or EMI compliance failures post-migration.
What role does the reference voltage play in the accuracy of regulated outputs from the LT11173CN8#PBF?
The internal bandgap reference provides a nominal 1.25V with ±2% initial tolerance and ±10mV drift over temperature. Since output voltage is set via a resistor divider from this reference, absolute accuracy depends on resistor matching and stability. For a 5V version like the LT11173CN8#PBF, a 1% metal-film resistor pair yields better than ±3% end-to-end accuracy over 0°C to 70°C, sufficient for most non-precision applications but inadequate for high-accuracy metrology systems requiring <±0.5% stability.
How do environmental factors like humidity and vibration affect long-term reliability of the LT11173CN8#PBF in field-deployed equipment?
As a plastic DIP-8 package, the LT11173CN8#PBF is susceptible to moisture ingress under prolonged high-humidity exposure (>85% RH), which can lead to popcorning during reflow or thermal cycling. In mechanically stressed environments, wire bonds experience fatigue, particularly near the bond pad corners. While MIL-STD testing is uncommon for such parts, conformal coating and strain relief on leads can mitigate risks in outdoor or transportation-related applications where shock and vibration are prevalent.
What trade-offs exist between using the LT11173CN8#PBF versus a buck converter in a space-constrained embedded design?
Choosing the LT11173CN8#PBF saves board area compared to discrete synchronous buck solutions but sacrifices efficiency (typically 60–70% vs. 85–95%) and introduces thermal penalties. In designs where quiet analog circuits coexist with digital loads, the linear regulator’s inherent low switching noise is advantageous, but heat sinks or thick PCB layers become necessary. Ultimately, the decision hinges on whether noise sensitivity outweighs power budget constraints—often resolved through simulation of worst-case power budgets under peak load and ambient temperature extremes.
Does the LT11173CN8#PBF support adjustable output configurations, and what practical limitations apply?
Yes, the LT11173CN8#PBF supports adjustable outputs down to 1.25V using standard resistor dividers. However, minimum load current requirements (~5mA) prevent true "no-load" operation unless supplemented with a bleeder resistor. Additionally, output ripple rejection degrades at low voltages due to reduced headroom, making it unsuitable for ultra-low-voltage analog subsystems where PSRR is paramount. Resistor choices must balance accuracy against power consumption, especially in battery-backed designs.
What diagnostic techniques are effective for troubleshooting erratic behavior involving the LT11173CN8#PBF in production units?
Common failure modes include oscillations caused by missing output capacitance, thermal shutdown due to inadequate heatsinking, or incorrect feedback resistor values leading to overvoltage. Use a spectrum analyzer or oscilloscope with bandwidth limiting (20MHz) to inspect output ripple and switching artifacts. Measure junction temperature via infrared thermometer or thermal imaging if possible. Verify input voltage never exceeds 15V transiently, and check for cold solder joints or lifted leads, particularly around the ground pin where ground bounce often manifests as unstable regulation.

Customers Also Interested in

Recommended Products

Customer Reviews

Evaluation: 10 Articles

  • Nikh***ech
    Aug 13, 2026

    Great low-power MCU for portable equipment. Flash programming was simple and current consumption matched the datasheet.

  • Embe***dMotion
    Aug 5, 2026

    Purchased this DSP controller for a motor control application. Stable processing performance and very good response under varying loads.

  • FPGA***dio
    Jul 30, 2026

    This FPGA handled our logic design without any surprises. Configuration completed quickly and timing met the project requirements.

  • Nord***mbedded
    Jul 20, 2026

    Reliable FPGA with predictable behavior. Configuration and testing went smoothly, making development faster than expected.

  • Arch***ct
    Jul 15, 2026

    Used this device in a communication signal processing board. Stable timing and no unexpected issues during implementation.

  • FPGA***lorer88
    Jul 7, 2026

    The FPGA works properly and all functions operate as expected. Documentation required some additional research, but overall it is a usable device for smaller signal processing projects.

  • Nath***oleman
    Jun 29, 2026

    Used this sensor component in an industrial automation setup. Detection accuracy was consistent and installation was straightforward.

  • Emil***rperTech
    Jun 23, 2026

    Works exactly as described. I used it as a USB-to-SPI bridge in a small MCU development project and communication was stable from the first setup.

  • Liam***terTech
    Jun 15, 2026

    Used this CPLD in a logic control project. Programming was straightforward and signal timing matched the design requirements.

  • 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.

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

LT11173CN8#PBF

LT
32D-LT11173CN8#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