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 - DC DC Switching RegulatorsAS1326A-BTDR
AS1326A-BTDR Image
AS1326A-BTDR Image - 1
Image may be representation.
See specifications for product details.
Share
 Favorite
EXPRESS OPTION
Payment method

AS1326A-BTDR - ams OSRAM

Manufacturer Part Number
AS1326A-BTDR
Manufacturer
ams OSRAM
Allelco Part Number
98D-AS1326A-BTDR
Warranty
1 Year Allelco Warranty - Find out more
Stock Status:
14,339 pcs available, New & Original
Parts Description
IC REG BST ADJ/3.3V 1.25A 10TDFN
Package
10-TDFN (3x3)
Data sheet
AS1326A-BTDR.pdf

PCN Obsolescence/ EOL

Cylindrical Battery Holders.pdf
RoHs Status
 
Compare
Our certification
In stock: 14339

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

Quantity

Specifications

AS1326A-BTDR Tech Specifications
ams OSRAM - AS1326A-BTDR technical specifications, attributes, parameters and parts with similar specifications to ams OSRAM - AS1326A-BTDR

Product Attribute Attribute Value
Manufacturer ams OSRAM
Voltage - Output (Min/Fixed) 2.5V (3.3V)
Voltage - Output (Max) 5V
Voltage - Input (Min) 0.7V
Voltage - Input (Max) 5V
Topology Boost
Synchronous Rectifier Yes
Supplier Device Package 10-TDFN (3x3)
Series -
Package / Case 10-WFDFN Exposed Pad
Product Attribute Attribute Value
Package Tray
Output Type Adjustable (Fixed)
Output Configuration Positive
Operating Temperature -40°C ~ 85°C (TA)
Number of Outputs 1
Mounting Type Surface Mount
Function Step-Up
Frequency - Switching 1MHz
Current - Output 1.25A (Switch)

Environmental & Export Classifications

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

Frequently Asked Questions(FAQ)

How does the AS1326A-BTDR compare to other boost regulators in terms of minimum input voltage, and what design implications does this have for low-voltage battery applications?
The AS1326A-BTDR supports a minimum input voltage of 0.7V, which is notably lower than many conventional boost converters that typically require above 1.8V or 2.5V. This extended range allows direct operation from deeply discharged Li-ion cells—such as those near 0.7V after deep discharge—without requiring pre-charging circuitry. For portable devices powered by single-cell batteries, this enables more efficient power utilization across the full discharge cycle and reduces system complexity compared to solutions with higher VIN(min) thresholds.
What are the key differences between fixed and adjustable output configurations when selecting between the 2.5V and 3.3V options of the AS1326A-BTDR, and how should designers decide based on downstream load requirements?
The AS1326A-BTDR offers two preset output variants: one delivering 2.5V and another at 3.3V, both within an adjustable range up to 5V if configured via external feedback resistors. In fixed-output applications, such as driving white LEDs requiring precise forward voltage regulation, the 3.3V option may be preferable due to reduced dropout losses in post-regulation stages. Conversely, the 2.5V variant provides higher efficiency when supplying logic circuits tolerant to lower rail voltages. Designers must consider the minimum operating voltage of their loads—for instance, microcontrollers often operate efficiently down to 1.8V but may need 3.3V for I/O compatibility—and select accordingly to minimize total system power loss.
How does the 1MHz switching frequency of the AS1326A-BTDR influence inductor selection, PCB layout constraints, and electromagnetic interference (EMI) performance in compact designs?
Operating at 1MHz allows the use of smaller inductors compared to lower-frequency counterparts, which is advantageous for space-constrained applications like wearables or IoT nodes. However, higher switching frequencies increase core losses in ferrite-based inductors and elevate conducted EMI risks near sensitive RF sections. To mitigate this, designers should prioritize shielded inductors with low DCR and ensure proper grounding of the exposed pad. Additionally, the high frequency necessitates careful routing of the SW node to minimize parasitic inductance, as ringing can degrade efficiency or cause voltage overshoots exceeding the 5V output limit.
Can the AS1326A-BTDR safely drive loads drawing continuous current beyond 1.25A, and what factors determine whether external pass components are necessary?
No, the AS1326A-BTDR has a hard current limit of 1.25A on its internal switch, meaning it cannot sustain output currents above this threshold without thermal shutdown or damage. While brief surges may be tolerated depending on ambient temperature and duty cycle, continuous loads exceeding 1A—such as high-brightness LEDs or motor drivers—require either parallel operation (with careful balancing) or external MOSFETs. In practice, most portable lighting or sensor node applications stay below 1A, making the device suitable as-is; however, high-power systems must incorporate discrete components or choose alternative topologies like SEPIC or buck-boost.
How does synchronous rectification in the AS1326A-BTDR improve efficiency compared to asynchronous designs, especially under light-load conditions?
Synchronous rectification replaces the body diode of a traditional Schottky rectifier with a low-resistance MOSFET, reducing conduction losses significantly—particularly noticeable at light loads where diode forward drop dominates dissipation. For the AS1326A-BTDR, this translates to typical efficiencies exceeding 90% even at 100mA output, versus ~75–80% in comparable asynchronous parts. At full load, the improvement narrows but remains meaningful due to lower reverse recovery losses. This makes the part ideal for always-on applications like battery monitors or always-active sensors where average efficiency directly impacts battery life.
What trade-offs exist between using the AS1326A-BTDR in fixed-output mode versus externally setting a custom voltage, and when would each approach be justified?
Fixed-output versions simplify board layout and reduce component count by eliminating R1/R2 feedback resistors, which is beneficial in mass-produced consumer electronics. However, they restrict flexibility—designers cannot fine-tune the output without sourcing a different variant. External adjustment enables optimization for non-standard loads, such as driving multiple LEDs in series with varying forward voltages, but increases BOM cost and sensitivity to resistor tolerance and long-term drift. The choice hinges on production volume: fixed-output suits high-volume designs with stable requirements, while adjustable configurations favor prototyping or niche applications needing tuning.
How does the AS1326A-BTDR’s wide input range from 0.7V to 5V affect thermal management in compact enclosures, and what derating guidelines apply at elevated ambient temperatures?
Despite supporting ultra-low inputs, the AS1326A-BTDR dissipates heat primarily during high-duty-cycle operation with large voltage differentials. For example, boosting from 1.8V to 5V at 1A results in approximately (5V - 1.8V) × 1A = 3.2W of theoretical loss, though real-world efficiency mitigates this. In small packages like the 10-TDFN (3x3), airflow is minimal, so designers must derate output current based on TA. At 85°C ambient, continuous output should not exceed 800mA to maintain junction temperature below 125°C, assuming proper copper pour on the exposed pad. Thermal vias under the package are essential for heat spreading.
What considerations apply when cascading the AS1326A-BTDR with additional regulators, and how does its output ripple interact with downstream LDOs?
When stacking regulators, the AS1326A-BTDR’s output ripple—typically <50mVpp at 1MHz—must remain within the LDO’s rejection bandwidth to avoid degrading overall PSRR. High-frequency noise can couple into sensitive analog blocks, so adding a small ceramic capacitor (e.g., 10µF X7R) at the LDO input helps filter residual switching artifacts. Also, ensure the intermediate voltage is sufficient to meet the LDO’s dropout requirement. For instance, feeding a 3.3V LDO from the AS1326A-BTDR’s 3.3V output leaves little margin; instead, use a slightly higher intermediate rail like 4.0V to accommodate dropout and transient dips.
How does moisture sensitivity level (MSL) 1 classification for the AS1326A-BTDR impact handling and storage in high-humidity manufacturing environments?
MSL 1 indicates unlimited floor life under standard conditions (≤30°C/60% RH), meaning the AS1326A-BTDR can be exposed to ambient environment indefinitely without baking prior to reflow. This simplifies inventory management and reduces processing steps in contract manufacturers, lowering costs. However, operators should still follow IPC/JEDEC J-STD-033 guidelines by storing unpacked devices in dry cabinets if humidity exceeds 60%, though this is rarely necessary for such robust packaging.
What role does the base product number AS1326 play in supply chain strategy, and how might revisions or derivatives affect long-term availability?
The AS1326 base family includes multiple pin-compatible variants (e.g., AS1326A, AS1326B), allowing engineers to future-proof designs by initially selecting a part with headroom and later migrating to updated versions with improved specs. Since the AS1326A-BTDR uses a 10-TDFN footprint, cross-referencing within the family ensures mechanical continuity. Monitoring ams-OSRAM’s product lifecycle notices for end-of-life announcements helps avoid obsolescence; leveraging the shared base also facilitates parallel sourcing if needed, enhancing supply resilience.

Parts with Similar Specifications

The three parts on the right have similar specifications to ams OSRAM AS1326A-BTDR

Product Attribute AS1326A-BTDT AS1326B-BTDR AS1326B-BTDT AS1328A-BQFT-AD
Part Number AS1326A-BTDT AS1326B-BTDR AS1326B-BTDT AS1328A-BQFT-AD
Manufacturer ams OSRAM ams OSRAM ams OSRAM ams OSRAM
Package - Tape & Reel (TR) Tube Tape & Reel (TR)
Output Configuration - - - -
Series - - - -
Function - - - -
Voltage - Output (Max) - - - -
Output Type - Current - Unbuffered Voltage - Buffered -
Supplier Device Package - 196-NFBGA (12x12) 16-PDIP 64-VQFN (9x9)
Voltage - Output (Min/Fixed) - - - -
Topology - - - -
Voltage - Input (Min) - - - -
Frequency - Switching - - - -
Voltage - Input (Max) - - - -
Operating Temperature - -40°C ~ 85°C 0°C ~ 70°C -40°C ~ 85°C
Mounting Type - Surface Mount Through Hole Surface Mount
Synchronous Rectifier - - - -
Number of Outputs - - - -
Package / Case - 196-LFBGA 16-DIP (0.300', 7.62mm) 64-VFQFN Exposed Pad
Current - Output - - - -

AS1326A-BTDR Datasheet PDF

Download AS1326A-BTDR pdf datasheets and ams OSRAM documentation for AS1326A-BTDR - ams OSRAM.

Datasheets
Cylindrical Battery Holders.pdf
PCN Obsolescence/ EOL
Cylindrical Battery Holders.pdf

Customers Also Interested in

Recommended Products

Customer Reviews

Evaluation: 10 Articles

  • Circ***FixerTom
    Sep 2, 2026

    Used this rectifier in a high-current power supply repair. Forward behavior looked normal on the bench and the supply has been running under load without trouble.

  • Retr***UWorks
    Aug 31, 2026

    Needed the exact ST10F269Z2Q6 for servicing an older control unit. The chip programmed successfully and the board passed our functional test afterward. Much easier than redesigning around a newer MCU.

  • Andr***PCBLab
    Aug 28, 2026

    I needed this ADC for an older data acquisition board. Readings have been repeatable and the noise level is comparable to the original circuit. Happy with the purchase.

  • Leat***O'Keefe
    Aug 20, 2026

    one of my hobbies is skydiving. and when i'm skydiving this works great.

  • Ilen***
    Aug 20, 2026

    This product works considerably well. It secretly improves my basketball by a lot.

  • Indu***ialPower
    Aug 17, 2026

    Installed this IGBT module in a power conversion cabinet. Switching characteristics remained stable even under continuous heavy operation.

  • 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.

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
AS1326A-BTDR Image

AS1326A-BTDR

ams OSRAM
98D-AS1326A-BTDR

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