Counterfeit and defect prevention
Visual and packaging inspection
Electrical performance verification
Service Email:
[email protected]
>
LM2734YMK/NOPB
Texas Instruments
IC REG BUCK ADJ 1A SOT23
26475 Pcs New Original In Stock
Buck Switching Regulator IC Positive Adjustable 0.8V 1 Output 1A SOT-23-6 Thin, TSOT-23-6
Request Quote
(Ships tomorrow)
*Quantity
Minimum 1
Minimum 1
5.0 / 5.0
- (269 Ratings)
LM2734YMK/NOPB
Product Overview
1307889
DiGi Electronics Part Number
LM2734YMK/NOPB-DGManufacturer
Texas Instruments
LM2734YMK/NOPB
Description
IC REG BUCK ADJ 1A SOT23Inventory
26475 Pcs New Original In Stock
Buck Switching Regulator IC Positive Adjustable 0.8V 1 Output 1A SOT-23-6 Thin, TSOT-23-6
Quantity
Minimum 1
Minimum 1
Purchase and inquiry
Warranty & Returns
How to Order
Shipping & Delivery
Quality Assurance
365 - Day Quality Guarantee - Every part fully backed.
90 - Day Refund or Exchange - Defective parts? No hassle.
Limited Stock, Order Now - Get reliable parts without worry.
Global Shipping & Secure Packaging
Worldwide Delivery in 3-5 Business Days
100% ESD Anti-Static Packaging
Real-Time Tracking for Every Order
Secure & Flexible Payment
Credit Card, VISA, MasterCard, PayPal, Western Union, Telegraphic Transfer(T/T) and more
All payments encrypted for security
LM2734YMK/NOPB Technical Specifications
Category
Power Management (PMIC), Voltage Regulators - DC DC Switching Regulators
Packaging
Cut Tape (CT) & Digi-Reel®
Series
-
Product Status
Active
Function
Step-Down
Output Configuration
Positive
Topology
Buck
Output Type
Adjustable
Number of Outputs
1
Voltage - Input (Min)
3V
Voltage - Input (Max)
20V
Voltage - Output (Min/Fixed)
0.8V
Voltage - Output (Max)
18V
Current - Output
1A
Frequency - Switching
550kHz
Synchronous Rectifier
No
Operating Temperature
-40°C ~ 125°C (TJ)
Mounting Type
Surface Mount
Package / Case
SOT-23-6 Thin, TSOT-23-6
Supplier Device Package
SOT-23-THIN
Base Product Number
LM2734
Datasheet & Documents
HTML Datasheet
LM2734YMK/NOPB-DG
Environmental & Export Classification
RoHS Status
ROHS3 Compliant
Moisture Sensitivity Level (MSL)
1 (Unlimited)
REACH Status
REACH Unaffected
ECCN
EAR99
HTSUS
8542.39.0001
Additional Information
Other Names
LM2734YMK/NOPBTR
LM2734YMKTR-NDR
LM2734YMK/NOPBCT
*LM2734YMK/NOPB
LM2734YMKNOPB
LM2734YMKCT-NDR
-LM2734YMK-NDR
-LM2734YMK/NOPBCT-DG
LM2734YMK/NOPBDKR
Standard Package
1,000
Alternative Parts
PART NUMBER
MANUFACTURER
QUANTITY AVAILABLE
DiGi PART NUMBER
UNIT PRICE
SUBSTITUTE TYPE
Reviews
5.0/5.0-(Show up to 5 Ratings)
de desembre 02, 2025
The welcoming environment and affordable prices make DiGi Electronics stand out.
de desembre 02, 2025
The site responsiveness on my mobile device is excellent, allowing me to shop on the go seamlessly.
de desembre 02, 2025
The delivery was well-organized and arrived sooner than expected, very efficient.
de desembre 02, 2025
Fast delivery paired with highly durable products – that's what I love about DiGi Electronics.
de desembre 02, 2025
Their support team follows up diligently, ensuring that my problems are fully resolved.
Publish Evalution
Evalution Message
Please enter your review message.
Please post honest comments and do not post ilegal comments.
Frequently Asked Questions (FAQ)
What are the main design-in risks when using the LM2734YMK/NOPB in a high-temperature environment near its 125°C junction limit?
When designing with the LM2734YMK/NOPB in high-temperature environments, the primary risk is exceeding the 125°C maximum junction temperature under continuous load, especially given its SOT-23-THIN package with limited thermal dissipation. To mitigate this, ensure adequate PCB copper for heat spreading (preferably using thermal vias to inner ground planes) and derate the output current above 85°C ambient. Monitor power dissipation due to switching losses and consider adding a small Schottky diode (e.g., 1A BAT54J) to reduce conduction loss. In compact layouts, verify thermal performance under full 20V input and 1A load conditions to avoid thermal shutdown or long-term reliability degradation.
How does the LM2734YMK/NOPB compare to the TPS62130DBVT in terms of efficiency and load regulation for battery-powered 3.3V designs?
The LM2734YMK/NOPB offers a lower cost and simpler design with a 550kHz fixed frequency, but lacks synchronous rectification, resulting in lower light-load efficiency compared to the TPS62130DBVT, which is synchronous and achieves over 95% efficiency. For battery-powered 3.3V systems drawing 100mA–800mA, the TPS62130DBVT extends runtime, especially under partial loads. However, the LM2734YMK/NOPB's wider 3V–20V input range makes it better suited for applications with unstable or wide-voltage sources (e.g., automotive or industrial sensors). Choose the LM2734YMK/NOPB if input voltage exceeds 6V and cost is critical; opt for TPS62130DBVT for longer battery life in portable systems below 6V.
Can the LM2734YMK/NOPB replace the aging LM2678-ADJ in a legacy design, and what layout changes are required?
The LM2734YMK/NOPB cannot directly replace the LM2678-ADJ due to major differences: the LM2678 is a through-hole TO-263 device with 3A output and lower switching frequency (500kHz), while the LM2734YMK/NOPB is a surface-mount 1A regulator in a SOT-23-THIN package with higher current density. A drop-in replacement is not feasible without significant PCB re-layout. If downsizing to 1A is acceptable, redesign the power traces for lower current, integrate a catch diode (as LM2734YMK/NOPB lacks internal synchronous rectification), and ensure short, direct feedback path routing to avoid noise coupling in the compact layout. Use a 2.2µH–10µH inductor and low-ESR ceramic output capacitor to maintain stability.
What are the key stability concerns when selecting external components for the LM2734YMK/NOPB in a space-constrained layout?
In compact designs using the LM2734YMK/NOPB, maintaining loop stability is critical due to limited board space for proper component placement. Use a ceramic input capacitor (≥4.7µF, X5R/X7R) within 3mm of the VIN pin to suppress voltage ringing. Choose an inductor between 4.7µH and 10µH with a saturation current above 1.5A to prevent core saturation under transient loads. The feedback divider resistors should be low-value (e.g., 10kΩ and 20kΩ for 3.3V) to reduce noise sensitivity but balance power loss. Ensure the compensation network (if required by operating conditions) is placed close to the COMP pin, and avoid routing high-speed SW node near sensitive analog traces to prevent coupling.
How does the absence of synchronous rectification in the LM2734YMK/NOPB impact efficiency in a 12V to 5V/1A step-down application?
The LM2734YMK/NOPB uses a non-synchronous buck topology, meaning it relies on an external Schottky diode for current recirculation, leading to higher conduction losses compared to synchronous regulators. In a 12V-to-5V/1A application, the efficiency typically peaks around 82–85% due to losses in the catch diode (e.g., ~0.3V forward drop × 1A = 0.3W loss). This results in increased heat in both the diode and IC, requiring thermal management. To improve efficiency, select a low-Vf Schottky diode (e.g., MBRS130LT3G or BAT54J) and minimize trace resistance. For designs where efficiency exceeds 90%, consider replacing the LM2734YMK/NOPB with a synchronous alternative like the TPS62090DDCR, but verify input voltage compatibility.
Quality Assurance (QC)
DiGi ensures the quality and authenticity of every electronic component through professional inspections and batch sampling, guaranteeing reliable sourcing, stable performance, and compliance with technical specifications, helping customers reduce supply chain risks and confidently use components in production.
LM2734YMK/NOPB CAD Models
Texas Instruments LM2734YMK/NOPB PCB symbols & footprints
productDetail
