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 ICsLP38693QSD-ADJ/NOPB
Image may be representation.
See specifications for product details.
Share
 Favorite
EXPRESS OPTION
Payment method

LP38693QSD-ADJ/NOPB - Texas Instruments

Manufacturer Part Number
LP38693QSD-ADJ/NOPB
Manufacturer
Texas Instruments
Allelco Part Number
41D-LP38693QSD-ADJ/NOPB
Warranty
1 Year Allelco Warranty - Find out more
Stock Status:
8,550 pcs available, New & Original
Parts Description
WSON-6
Data sheet
-
Category
Integrated Circuits (ICs) > Specialized ICs
RoHs Status
Compare
Our certification
In stock: 8550

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

Quantity

Specifications

LP38693QSD-ADJ/NOPB Tech Specifications
Texas Instruments - LP38693QSD-ADJ/NOPB technical specifications, attributes, parameters and parts with similar specifications to Texas Instruments - LP38693QSD-ADJ/NOPB

Product Attribute Attribute Value
Part Number LP38693QSD-ADJ/NOPB
Package WSON-6
Description WSON-6
Stock Condition Get 8550 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 Texas Instruments
RoHs Status -
Warranty 100% Perfect Functions
Transport port Hong Kong
Shipping by DHL / FedEx / UPS / TNT / SF Express
RFQ Email info@allelco.com

Parts Introduction

Manufacturer Part Number

LP38693QSD-ADJ/NOPB

Manufacturer

Texas Instruments

Introduction

The LP38693QSD-ADJ/NOPB is a high-performance, low-dropout (LDO) linear voltage regulator with an adjustable output voltage. It is designed to provide a stable and efficient power supply for a wide range of electronic devices and systems.

Product Features and Performance

Adjustable output voltage from 1.25V to 9V

Maximum output current of 500mA

Quiescent current of only 55μA

High power supply rejection ratio (PSRR) of 55dB at 120Hz

Integrated enable control feature

Over-temperature protection

Product Advantages

Excellent line and load regulation for stable output voltage

High efficiency and low power consumption

Compact surface-mount package for space-constrained designs

Automotive-grade qualification for use in harsh environments

Key Reasons to Choose This Product

Reliable and robust performance for critical applications

Versatile adjustable output voltage range for diverse system requirements

Low quiescent current for extended battery life in portable devices

Automotive qualification ensures suitability for automotive and industrial applications

Quality and Safety Features

AEC-Q100 qualified for automotive use

Integrated over-temperature protection for enhanced safety

Compatibility

The LP38693QSD-ADJ/NOPB is compatible with a wide range of electronic devices and systems, including:

Automotive electronics

Industrial control systems

Consumer electronics

Portable devices

Application Areas

Power supplies for microcontrollers, processors, and other digital logic

Voltage regulation for analog and RF circuits

Power conditioning for sensors and small motors

Battery-powered devices and systems

Product Lifecycle

The LP38693QSD-ADJ/NOPB is an active product and there are no immediate plans for discontinuation. However, as technology evolves, equivalent or alternative models may become available in the future. Customers are advised to contact our website's sales team for the latest product information and availability.

Frequently Asked Questions(FAQ)

What are the key design considerations when using the LP38693QSD-ADJ/NOPB in an automotive power supply application?
The LP38693QSD-ADJ/NOPB is qualified to AEC-Q100 standards and rated for operation from -40°C to 125°C, making it suitable for harsh automotive environments. Designers should account for input voltage transients up to 10V maximum and ensure adequate thermal management due to the 3x3 mm 6-WSON package’s limited heatsinking capability. With a quiescent current of only 55 µA, it supports low-power modes critical in always-on systems, but output stability requires careful selection of bypass and output capacitors—TI recommends low-ESR ceramic types to maintain phase margin across temperature.
How does the dropout voltage of the LP38693QSD-ADJ/NOPB compare to other adjustable LDOs in its class?
While the LP38693QSD-ADJ/NOPB does not specify a maximum dropout voltage in the datasheet, typical performance at 500 mA load and room temperature shows approximately 300 mV dropout when input is near 3.3 V. This is competitive with similar 500 mA adjustable LDOs such as the TPS7A4700, though slightly higher than ultra-low-dropout alternatives like the ADP7118. The trade-off is justified by its wider input range (up to 10V) and automotive-grade robustness, making it preferable in systems where input headroom varies significantly.
Can the LP38693QSD-ADJ/NOPB support a 1.8 V output from a 3.3 V rail with 500 mA load current?
Yes, the LP38693QSD-ADJ/NOPB can regulate down to 1.8 V from a 3.3 V input at full 500 mA load, provided the input-output differential remains above the typical dropout (~300 mV). This leaves ~1.2 V of headroom, which is sufficient. However, power dissipation must be evaluated: at 500 mA, the device dissipates (3.3 V – 1.8 V) × 0.5 A = 0.75 W. In the 6-WSON package with θJA ≈ 40°C/W on a standard PCB, this results in a ~30°C temperature rise above ambient—manageable with proper layout but requiring attention in confined enclosures.
What capacitor values and types are recommended for stable operation with the LP38693QSD-ADJ/NOPB?
Texas Instruments specifies a minimum 1 µF ceramic input capacitor and a 10 µF low-ESR ceramic output capacitor for stable regulation with the LP38693QSD-ADJ/NOPB. The output capacitor’s ESR should be between 10 mΩ and 500 mΩ; values outside this range may cause instability. X5R or X7R dielectrics are preferred due to their stability over temperature. Avoid tantalum or aluminum electrolytics unless bypassed with ceramic capacitors, as their higher ESR can degrade transient response and phase margin.
How does the enable function on the LP38693QSD-ADJ/NOPB impact system power management?
The enable pin on the LP38693QSD-ADJ/NOPB allows logic-level shutdown, reducing supply current to less than 1 µA when disabled. This is useful in battery-powered automotive modules where subsystems are periodically powered down. The enable threshold is typically 1.2 V (rising), so it can be driven directly by 1.8 V, 3.3 V, or 5 V logic. However, during power-up sequencing, ensure the enable signal does not float—use a pull-down resistor if not actively driven—to prevent unintended activation during brownout or startup transients.
Is the LP38693QSD-ADJ/NOPB suitable for noise-sensitive analog circuits, and how does its PSRR compare at different frequencies?
With a PSRR of 55 dB at 120 Hz, the LP38693QSD-ADJ/NOPB provides good rejection of low-frequency ripple, such as that from switching pre-regulators or ignition systems. However, PSRR degrades above 10 kHz, dropping below 30 dB by 100 kHz. For sensitive analog loads like ADCs or RF receivers, additional filtering (e.g., π-filter or ferrite bead) may be needed. Compared to high-PSRR LDOs like the LT3045, it offers less high-frequency noise suppression but compensates with wider input tolerance and automotive qualification.
What layout practices are critical when placing the LP38693QSD-ADJ/NOPB on a PCB?
The exposed pad on the 6-WSON package of the LP38693QSD-ADJ/NOPB must be soldered directly to a grounded thermal plane with multiple vias to the inner or bottom layers to maximize heat dissipation. Input and output capacitors should be placed within 2 mm of the respective pins to minimize loop inductance. The feedback resistor network (for adjustable output) should be routed away from high-di/dt traces to avoid noise coupling. Ground return paths should be kept short and star-connected if possible to reduce ground bounce in high-current scenarios.
Can the LP38693QSD-ADJ/NOPB be used in parallel with another LDO to increase output current?
Parallel operation of the LP38693QSD-ADJ/NOPB is not recommended without external current-sharing circuitry. Minor variations in output voltage setpoints due to resistor tolerances or temperature gradients can cause one regulator to carry most of the load, leading to thermal imbalance and potential overstress. If higher current is needed, consider a single higher-current LDO such as the LP38691 (800 mA) or a switching regulator. For redundancy or load sharing, use ballast resistors or active current-sharing controllers, but this adds complexity and reduces efficiency.
How does the LP38693QSD-ADJ/NOPB handle input voltage reversal or negative transients in automotive environments?
The LP38693QSD-ADJ/NOPB lacks internal reverse-polarity protection. In automotive applications where battery reversal or load-dump events may occur, an external blocking diode or MOSFET-based protection circuit is required. Without such measures, negative input voltages can forward-bias internal ESD diodes, potentially damaging the device. Additionally, during cold-crank conditions where input drops below 3 V, ensure the enable logic remains valid or use a supervisor circuit to prevent erratic behavior.
What is the significance of the MSL 1 rating for the LP38693QSD-ADJ/NOPB in high-volume manufacturing?
The moisture sensitivity level (MSL) 1 rating indicates that the LP38693QSD-ADJ/NOPB is not moisture-sensitive and can be stored and handled indefinitely under normal conditions without requiring dry packing or bake-out procedures. This simplifies logistics and reduces production delays in automotive manufacturing lines, where components are often stored for extended periods. It also reduces the risk of popcorning during reflow, especially important in high-temperature lead-free soldering processes.
How does the LP38693QSD-ADJ/NOPB perform under load transient conditions?
The LP38693QSD-ADJ/NOPB exhibits moderate transient response due to its internal compensation and 500 mA current limit. With a 10 µF ceramic output capacitor, output voltage deviation during a 100 mA to 500 mA step load is typically within 100–150 mV, recovering within 50 µs. Faster recovery can be achieved with higher output capacitance, but stability must be verified. For applications with rapid load changes (e.g., microcontroller sleep/wake cycles), consider adding a small feedforward capacitor across the top feedback resistor to improve bandwidth.
Are there known compatibility issues when replacing older LDOs with the LP38693QSD-ADJ/NOPB in existing designs?
The LP38693QSD-ADJ/NOPB can serve as a drop-in replacement for many 500 mA adjustable LDOs in 3x3 mm packages, but differences in enable logic thresholds, quiescent current, and output capacitor requirements must be verified. For example, some legacy LDOs may require higher ESR output capacitors, which would conflict with the LP38693QSD-ADJ/NOPB’s stability needs. Additionally, its lower Iq (55 µA vs. 100+ µA in older parts) may alter power budgeting in ultra-low-power systems—always revalidate thermal and transient performance in the target application.

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
Texas Instruments

LP38693QSD-ADJ/NOPB

Texas Instruments
41D-LP38693QSD-ADJ/NOPB

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