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 RegulatorsAS1324-BTTT-AD
AS1324-BTTT-AD Image
AS1324-BTTT-AD Image - 1
Image may be representation.
See specifications for product details.
Share
 Favorite
EXPRESS OPTION
Payment method

AS1324-BTTT-AD - ams OSRAM

Manufacturer Part Number
AS1324-BTTT-AD
Manufacturer
ams OSRAM
Allelco Part Number
32D-AS1324-BTTT-AD
Warranty
1 Year Allelco Warranty - Find out more
Stock Status:
15,300 pcs available, New & Original
Parts Description
IC REG BUCK ADJ 600MA TSOT23-5
Package
TSOT-23-5
Data sheet
AS1324-BTTT-AD.pdf

PCN Obsolescence/ EOL

Cylindrical Battery Holders.pdf
RoHs Status
 
Compare
Our certification
In stock: 15300

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

Quantity

Specifications

AS1324-BTTT-AD Tech Specifications
ams OSRAM - AS1324-BTTT-AD technical specifications, attributes, parameters and parts with similar specifications to ams OSRAM - AS1324-BTTT-AD

Product Attribute Attribute Value
Manufacturer ams OSRAM
Voltage - Output (Min/Fixed) 0.6V
Voltage - Output (Max) 5.5V
Voltage - Input (Min) 2.7V
Voltage - Input (Max) 5.5V
Topology Buck
Synchronous Rectifier Yes
Supplier Device Package TSOT-23-5
Series -
Package / Case SOT-23-5 Thin, TSOT-23-5
Product Attribute Attribute Value
Package Tape & Reel (TR)
Output Type Adjustable
Output Configuration Positive
Operating Temperature -40°C ~ 85°C (TA)
Number of Outputs 1
Mounting Type Surface Mount
Function Step-Down
Frequency - Switching 1.5MHz
Current - Output 600mA

Environmental & Export Classifications

ATTRIBUTE DESCRIPTION
Moisture Sensitivity Level (MSL) 3 (168 Hours)
REACH Status REACH Unaffected
ECCN EAR99
HTSUS 8542.39.0001

Frequently Asked Questions(FAQ)

How does the AS1324-BTTT-AD handle thermal performance under continuous 600mA load in a compact SOT-23-5 package, and what are the implications for PCB layout in high ambient temperature environments?
The AS1324-BTTT-AD maintains stable operation at 600mA output current due to its integrated synchronous rectifier and internal MOSFETs, which reduce conduction losses. However, in the small TSOT-23-5 footprint, power dissipation can reach approximately 0.8W under worst-case conditions (e.g., Vin = 5V, Vout = 3.3V, 600mA load). At elevated ambient temperatures (up to 85°C), this requires careful thermal design—ensuring adequate copper area, avoiding adjacent heat-generating components, and maintaining airflow. Without a heatsink, junction temperature may exceed safe limits, potentially triggering thermal shutdown. Therefore, even though the device is rated for industrial temperature ranges, PCB-level thermal management is essential for reliable long-term operation.
Can the AS1324-BTTT-AD be used in battery-powered applications such as Li-ion or alkaline cells, and how does its 2.7V minimum input voltage affect runtime efficiency across different supply types?
Yes, the AS1324-BTTT-AD is suitable for battery-powered systems using single-cell Li-ion (3.0–4.2V nominal) or three-to-four alkaline cells (up to ~6V). Its 2.7V minimum input allows it to operate effectively even as Li-ion batteries discharge below 3.0V, extending usable capacity compared to regulators requiring higher startup voltages. With a switching frequency of 1.5MHz, it enables the use of tiny inductors and capacitors, reducing BOM size and quiescent current. Efficiency typically exceeds 85% over most of the input range, making it favorable for applications where energy conservation and space are critical—such as wearables or IoT sensors powered by CR2032 or AA batteries.
What external components are required to configure the AS1324-BTTT-AD for a 3.3V output, and how do component tolerances impact output accuracy and stability?
To set a 3.3V output, an external resistor divider from Vout to GND with one end connected to FB (feedback pin) is required. For example, R1 = 10kΩ and R2 = 20kΩ yield Vout = 0.6 × (1 + 20/10) = 3.6V, so slightly lower values like R1 = 12kΩ and R2 = 22kΩ are preferred. Standard 1% tolerance resistors are recommended to maintain ±1% output accuracy. Additionally, a ceramic input capacitor (≥1µF) and output capacitor (≥2.2µF X5R/X7R) are necessary for stability, especially given the 1.5MHz switching frequency. Poor ESR in output caps can lead to oscillation; thus, low-ESR types are mandatory. Component selection directly affects transient response and noise immunity in sensitive analog circuits.
How does the AS1324-BTTT-AD compare to other 1.5MHz buck regulators like the AP2204 or TPS62130 in terms of quiescent current and efficiency under light-load conditions?
The AS1324-BTTT-AD typically draws around 30µA quiescent current, which is competitive for its class. Compared to the AP2204 (similar 1.5MHz operation), it offers marginally better efficiency at light loads due to optimized gate drive and lower switching losses. However, the TPS62130 (from Texas Instruments) achieves even lower IQ (~15µA) with pulse-skipping mode, making it preferable for ultra-low-power systems. While the AS1324 excels in moderate-performance designs where cost and footprint matter more than absolute efficiency at idle, it trades off some light-load performance against simplicity and availability in small packages. Designers must weigh these factors based on system duty cycle and battery life requirements.
Is it possible to parallel two AS1324-BTTT-AD units to increase output current, and what precautions are necessary to ensure balanced current sharing and prevent instability?
Parallel operation of AS1324-BTTT-AD devices is generally not recommended without additional circuitry because their feedback loops are independent and lack built-in current sharing mechanisms. Mismatched switching phases or slight variations in output voltage can cause one regulator to dominate, leading to uneven current distribution and potential overheating. If higher current is needed beyond 600mA, redesigning with a single higher-current PMIC or using an alternative device rated for >1A would be safer. In rare cases where paralleling is unavoidable, external diodes and current-sharing resistors could be added, but this increases complexity, board area, and failure risk—making it impractical in space-constrained applications using the TSOT-23-5 package.
What are the key differences between the AS1324-BTTT-AD and a fixed-output buck converter like the MP2307GS, particularly in terms of flexibility, bill of materials, and suitability for programmable power supplies?
The AS1324-BTTT-AD offers adjustable output (0.6V to 5.5V) via an external resistor network, providing design flexibility for systems requiring variable rails. In contrast, the MP2307GS provides fixed outputs (e.g., 3.3V or 5V) and cannot be reconfigured post-manufacture. This makes the AS1324 ideal for prototyping or final products needing precise voltage tuning without hardware changes. However, the adjustable version adds minor cost and board space due to the resistor divider. From a BOM perspective, both require similar external passives, but the AS1324 demands careful attention to feedback loop compensation. For applications like microcontrollers with dynamic voltage scaling, the adjustability of the AS1324-BTTT-AD offers significant advantage over fixed alternatives.
How should decoupling capacitors be selected for the AS1324-BTTT-AD when operating near its maximum input voltage (5.5V), and why is input capacitance critical at 1.5MHz switching?
Input capacitors must suppress high-frequency ripple generated by the 1.5MHz switching action and prevent input voltage droop during load transients. A minimum of 1µF ceramic capacitor (X5R or X7R dielectric) with low ESL is essential. For improved transient response, a larger value (e.g., 2.2µF to 10µF) is advisable, especially if the source impedance is high (e.g., long PCB traces or battery connections). Near 5.5V input, capacitor voltage rating should exceed 10V to allow headroom. Using only bulk electrolytic capacitors risks instability and poor high-frequency performance. Proper input decoupling ensures clean power delivery and prevents false triggering or instability in the control loop.
What precautions should be taken when integrating the AS1324-BTTT-AD into a design that also includes RF modules or sensitive analog circuits, and how does the 1.5MHz switching frequency impact EMI considerations?
The 1.5MHz switching frequency places harmonics close to audio and sub-audible bands, increasing susceptibility to interference with nearby RF receivers or precision analog stages. To mitigate EMI, keep switch-node traces short and minimize loop areas involving input/output capacitors and inductors. Use shielded inductors and place the AS1324 away from sensitive circuitry. Adding ferrite beads or RC filters on the output can further reduce conducted emissions. Although conducted emissions are usually within regulatory limits for consumer electronics, radiated noise may affect systems operating in crowded ISM bands (e.g., 433MHz or 868MHz). Careful layout and filtering are necessary to maintain signal integrity in mixed-signal designs.
Does the AS1324-BTTT-AD support enable/disable functionality through its EN pin, and how does this feature interact with soft-start behavior during power-up sequencing?
Yes, the AS1324-BTTT-AD includes an enable (EN) pin that allows logic-level control to turn the regulator on and off. When pulled above 0.8V, the device activates and initiates a soft-start sequence lasting approximately 1ms, gradually ramping up the output to avoid inrush current surges. During this period, the internal reference stabilizes before enabling the output stage. Abruptly toggling the EN pin during operation may disrupt regulation unless sufficient delay is introduced between transitions. This feature supports power-saving modes in battery-operated devices but requires proper sequencing logic if multiple rails are involved to prevent reverse current flow or latch-up.
What is the impact of operating the AS1324-BTTT-AD near its thermal limits, and how does the lack of a dedicated thermal pad in the SOT-23-5 package influence heat dissipation strategies?
The AS1324-BTTT-AD lacks a thermal pad, relying solely on the three primary leads for heat conduction. Under continuous full-load conditions (600mA at 5V in), power dissipation approaches 1.2W, which is challenging to dissipate through conventional PCB copper pours alone. Without enhanced cooling, junction temperature can rise significantly above ambient, potentially triggering thermal shutdown after repeated cycles. Designers should allocate at least 10mm² of solid copper under the IC and avoid routing high-current paths underneath. Thermal vias to inner layers help spread heat laterally, but performance remains limited compared to packages with exposed pads. Thus, while functional up to 85°C ambient, reliability margins shrink under sustained heavy loads.
How does the Moisture Sensitivity Level (MSL) rating of 3 for the AS1324-BTTT-AD affect manufacturing handling, and what reflow profile constraints apply during assembly?
As an MSL 3 component (168-hour floor life), the AS1324-BTTT-AD must be stored in dry packaging and used within 168 hours after desiccant removal to prevent moisture absorption. Once opened, it should be baked if storage exceeded 168 hours or if humidity exceeded 60% RH prior to soldering. During reflow, peak temperatures must not exceed 260°C, and total time above 217°C should be less than 60 seconds to avoid degradation of internal bonds or delamination. Compliance with IPC/JEDEC J-STD-020 is required for reliable SMT assembly. These constraints necessitate careful inventory management and process monitoring in high-volume production environments.
Can the AS1324-BTTT-AD operate reliably in automotive-grade temperature ranges (-40°C to +125°C), and what modifications might be needed for such applications despite its standard industrial rating?
The AS1324-BTTT-AD is rated for -40°C to +85°C, which falls short of typical automotive AEC-Q100 Grade 2 requirements (up to 125°C). While it may function adequately in non-critical automotive infotainment subsystems with conservative derating, full compliance mandates testing per AEC-Q100 standards including temperature cycling, humidity resistance, and ESD robustness. For true automotive use, a qualified part (e.g., AEC-Q100 compliant variant) or alternative with extended temperature rating should be selected. Even then, layout and stress analysis remain essential due to vibration, thermal shock, and long-term drift in harsh environments.

Parts with Similar Specifications

The three parts on the right have similar specifications to ams OSRAM AS1324-BTTT-AD

Product Attribute AS1324-BTTT-18 AS1324-BTTT-12 AS1324-BTTT-15 AS1323-BTTT-33
Part Number AS1324-BTTT-18 AS1324-BTTT-12 AS1324-BTTT-15 AS1323-BTTT-33
Manufacturer ams OSRAM ams OSRAM ams OSRAM ams OSRAM
Supplier Device Package - 196-NFBGA (12x12) 16-PDIP 64-VQFN (9x9)
Frequency - Switching - - - -
Number of Outputs - - - -
Synchronous Rectifier - - - -
Voltage - Output (Max) - - - -
Operating Temperature - -40°C ~ 85°C 0°C ~ 70°C -40°C ~ 85°C
Mounting Type - Surface Mount Through Hole Surface Mount
Package - Tape & Reel (TR) Tube Tape & Reel (TR)
Series - - - -
Voltage - Input (Min) - - - -
Current - Output - - - -
Output Configuration - - - -
Package / Case - 196-LFBGA 16-DIP (0.300', 7.62mm) 64-VFQFN Exposed Pad
Function - - - -
Voltage - Input (Max) - - - -
Output Type - Current - Unbuffered Voltage - Buffered -
Topology - - - -
Voltage - Output (Min/Fixed) - - - -

AS1324-BTTT-AD Datasheet PDF

Download AS1324-BTTT-AD pdf datasheets and ams OSRAM documentation for AS1324-BTTT-AD - 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

  • 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.

  • 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.

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
AS1324-BTTT-AD Image

AS1324-BTTT-AD

ams OSRAM
32D-AS1324-BTTT-AD

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