Counterfeit and defect prevention
Visual and packaging inspection
Electrical performance verification
Service Email:
[email protected]
>
LM3671MF-1.2/NOPB
Texas Instruments
IC REG BUCK 1.2V 600MA SOT23-5
37997 Pcs New Original In Stock
Buck Switching Regulator IC Positive Fixed 1.2V 1 Output 600mA SC-74A, SOT-753
Request Quote
(Ships tomorrow)
*Quantity
Minimum 1
Minimum 1
5.0 / 5.0
- (297 Ratings)
LM3671MF-1.2/NOPB
Product Overview
1337356
DiGi Electronics Part Number
LM3671MF-1.2/NOPB-DGManufacturer
Texas Instruments
LM3671MF-1.2/NOPB
Description
IC REG BUCK 1.2V 600MA SOT23-5Inventory
37997 Pcs New Original In Stock
Buck Switching Regulator IC Positive Fixed 1.2V 1 Output 600mA SC-74A, SOT-753
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
LM3671MF-1.2/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
Fixed
Number of Outputs
1
Voltage - Input (Min)
2.7V
Voltage - Input (Max)
5.5V
Voltage - Output (Min/Fixed)
1.2V
Voltage - Output (Max)
-
Current - Output
600mA
Frequency - Switching
2MHz
Synchronous Rectifier
Yes
Operating Temperature
-40°C ~ 85°C (TA)
Mounting Type
Surface Mount
Package / Case
SC-74A, SOT-753
Supplier Device Package
SOT-23-5
Base Product Number
LM3671
Datasheet & Documents
Manufacturer Product Page
LM3671MF-1.2/NOPB Specifications
HTML Datasheet
LM3671MF-1.2/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
LM3671MF-1.2CT-NDR
*LM3671MF-1.2/NOPB
LM3671MF-1.2/NOPBTR
LM3671MF-1.2/NOPBDKR
LM3671MF-1.2TR-NDR
2156-LM3671MF-1.2/NOPB
TEXTISLM3671MF-1.2/NOPB
LM3671MF-1.2/NOPBCT
LM3671MF12NOPB
-LM3671MF-1.2-NDR
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
가격대비 정말 좋은 제품과 빠른 서비스를 제공해주셔서 감사해요.
de desembre 02, 2025
DiGi Electronics handles our bulk orders efficiently, which is crucial for our large-scale training programs.
de desembre 02, 2025
DiGi Electronics consistently demonstrates a strong commitment to customer care.
de desembre 02, 2025
Post-purchase, their support team kept me updated on my order status, which I appreciated.
de desembre 02, 2025
I've been pleasantly surprised by how reliable and cheap their products are.
de desembre 02, 2025
Their dedication to reducing environmental impact through packaging is inspiring.
de desembre 02, 2025
My transactions were smooth thanks to their efficient post-sale support.
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 key design-in risks when integrating the LM3671MF-1.2/NOPB into a space-constrained PCB with high thermal density?
When integrating the LM3671MF-1.2/NOPB in thermally challenging, compact layouts, the primary risk is inadequate heat dissipation due to limited copper area under the SOT-23-5 package. Despite its 600mA capability, continuous operation above ambient temperature limits (85°C) can trigger thermal shutdown. Mitigate this by ensuring at least 200 mm² of exposed ground copper connected to the device's thermal pad (if available in variant designs), using thermal vias, and avoiding placing heat-sensitive components nearby. Also, verify actual load transients—peak currents approaching 600mA should be limited in duty cycle to prevent localized heating.
How does the LM3671MF-1.2/NOPB compare to the RT9193-1.2YF5 in fixed 1.2V low-voltage applications for portable designs?
The LM3671MF-1.2/NOPB and RT9193-1.2YF5 both deliver fixed 1.2V from a 2.7V–5.5V input, but differ in switching behavior and integration. The LM3671MF-1.2/NOPB operates at a higher 2MHz frequency, enabling smaller external inductors and faster transient response—ideal for noise-sensitive RF or digital core supplies. However, the RT9193 has slightly lower quiescent current (~40µA vs. ~70µA), making it better for ultra-low-power sleep modes. Choose the LM3671MF-1.2/NOPB when space and noise are critical; prefer RT9193 if battery longevity under light loads dominates.
Can the LM3671MF-1.2/NOPB reliably replace the AP2112K-1.2 in a legacy 1.2V core rail upgrade, and what layout changes are required?
Yes, the LM3671MF-1.2/NOPB can replace the AP2112K-1.2 in most 1.2V core rail applications, but key differences must be addressed. The AP2112K is a lower-frequency (300kHz) LDO, while the LM3671MF-1.2/NOPB is a 2MHz synchronous buck converter—offering higher efficiency (~90% vs. ~60%) under moderate loads. However, switching noise is introduced. To ensure reliability, add a 10µF low-ESR ceramic output capacitor close to the load and use shielded inductors (e.g., 4.7µH). Also, route the switch node (SW) of the LM3671MF-1.2/NOPB away from analog traces to prevent EMI coupling.
What are the main reliability concerns when using the LM3671MF-1.2/NOPB in automotive under-the-hood environments within its rated temperature range?
Although the LM3671MF-1.2/NOPB is rated for -40°C to +85°C (TA), automotive under-the-hood use may expose it to localized temperatures exceeding 85°C due to engine heat soak. The device has no automotive qualification (AEC-Q100), so long-term reliability in such environments is at risk. Additionally, voltage spikes from load dump or crank conditions exceed the 5.5V max input. To use LM3671MF-1.2/NOPB in such scenarios, add a pre-regulator or transient voltage suppressor (TVS) diode, and derate current to 400mA or less with forced airflow. For safety-critical systems, consider qualified alternatives like the LM3671A-Q1.
What layout practices minimize EMI and ensure stable operation of the LM3671MF-1.2/NOPB in high-frequency switching designs?
To minimize EMI and ensure stability with the LM3671MF-1.2/NOPB, keep the high-current loop—input capacitor to VIN/SW pins to inductor—as small as possible. Use a 10µF X5R ceramic capacitor with low ESR (<10mΩ) within 2mm of VIN and GND. Place the feedback resistor divider (if adjustable in other variants) away from the SW node. For this fixed-output version, avoid routing sensitive traces near the inductor or SW pin. Use a solid ground plane and minimize vias in the power path. These steps reduce ringing, radiated noise, and output ripple, especially critical in mixed-signal systems using the 1.2V output for low-noise cores.
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.
LM3671MF-1.2/NOPB CAD Models
Texas Instruments LM3671MF-1.2/NOPB PCB symbols & footprints
productDetail
