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LM43600AQPWPTQ1
Texas Instruments
IC REG BUCK ADJ 500MA 16HTSSOP
2761 Pcs New Original In Stock
Buck Switching Regulator IC Positive Adjustable 1V 1 Output 500mA 16-PowerTSSOP (0.173", 4.40mm Width)
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5.0 / 5.0
- (438 Ratings)
LM43600AQPWPTQ1
Product Overview
1276477
DiGi Electronics Part Number
LM43600AQPWPTQ1-DGManufacturer
Texas Instruments
LM43600AQPWPTQ1
Description
IC REG BUCK ADJ 500MA 16HTSSOPInventory
2761 Pcs New Original In Stock
Buck Switching Regulator IC Positive Adjustable 1V 1 Output 500mA 16-PowerTSSOP (0.173", 4.40mm Width)
Quantity
Minimum 1
Minimum 1
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LM43600AQPWPTQ1 Technical Specifications
Category
Power Management (PMIC), Voltage Regulators - DC DC Switching Regulators
Packaging
Cut Tape (CT) & Digi-Reel®
Series
SIMPLE SWITCHER®
Product Status
Active
Function
Step-Down
Output Configuration
Positive
Topology
Buck
Output Type
Adjustable
Number of Outputs
1
Voltage - Input (Min)
3.5V
Voltage - Input (Max)
36V
Voltage - Output (Min/Fixed)
1V
Voltage - Output (Max)
28V
Current - Output
500mA
Frequency - Switching
200kHz ~ 2.2MHz
Synchronous Rectifier
Yes
Operating Temperature
-40°C ~ 125°C (TJ)
Grade
Automotive
Qualification
AEC-Q100
Mounting Type
Surface Mount
Package / Case
16-PowerTSSOP (0.173", 4.40mm Width)
Supplier Device Package
16-HTSSOP
Base Product Number
LM43600
Datasheet & Documents
Manufacturer Product Page
LM43600AQPWPTQ1 Specifications
HTML Datasheet
LM43600AQPWPTQ1-DG
Environmental & Export Classification
RoHS Status
ROHS3 Compliant
Moisture Sensitivity Level (MSL)
3 (168 Hours)
REACH Status
REACH Unaffected
ECCN
EAR99
HTSUS
8542.39.0001
Additional Information
Other Names
LM43600AQPWPTQ1-DG
296-47582-6
296-47582-2
296-47582-1
Standard Package
250
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
품질이 확실히 좋아서 신뢰가 가고, 배송도 시간에 맞춰 와서 편리했습니다.
de desembre 02, 2025
처음 방문했는데도 친절하게 대해주셔서 감사했고, 배송도 빠르고 정확했어요.
de desembre 02, 2025
가성비 뛰어난 제품으로 언제나 믿고 구매하는 브랜드입니다.
de desembre 02, 2025
They handle orders efficiently and supportively—top-notch service.
de desembre 02, 2025
Their team is always quick to respond and provides clear, helpful guidance.
de desembre 02, 2025
Site security measures made me feel safe entering my payment details.
de desembre 02, 2025
Post-purchase support includes detailed guidance, making troubleshooting easy.
de desembre 02, 2025
Their commitment to punctuality and customer care has built significant trust in our partnership.
de desembre 02, 2025
Great experience—fast shipping combined with supportive customer service.
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Frequently Asked Questions (FAQ)
Can the LM43600AQPWPTQ1 replace an LM2675 in a 12V-to-5V automotive power supply design without major layout changes?
The LM43600AQPWPTQ1 can functionally replace the LM2675 in a 12V-to-5V automotive application due to its wider input voltage range (3.5V–36V vs. LM2675’s 6.5V–40V) and higher efficiency at light loads thanks to its synchronous architecture. However, the LM43600AQPWPTQ1 operates at a much higher switching frequency (up to 2.2MHz vs. 260kHz), which demands tighter PCB layout practices—especially for the power ground, SW node, and feedback traces—to avoid EMI and instability. You’ll also need to redesign the output filter (inductor and capacitors) because the optimal inductance value and ripple current requirements differ significantly. Always validate thermal performance under full load and cold-crank conditions, as the 16-HTSSOP package has different thermal characteristics than the TO-263 used by the LM2675.
What are the key reliability risks when using the LM43600AQPWPTQ1 in a high-vibration automotive under-hood environment?
The LM43600AQPWPTQ1 is AEC-Q100 qualified, making it suitable for automotive environments, but mechanical stress from high vibration can still affect long-term reliability. The 16-HTSSOP package, while compact, has limited mechanical robustness compared to larger QFN or D2PAK packages. To mitigate risk, ensure the PCB is rigidly mounted with proper standoffs, use conformal coating to reduce solder joint fatigue, and avoid placing the device near board edges or flex points. Additionally, verify that all solder joints pass automotive-grade inspection standards (e.g., IPC-A-610 Class 3). Thermal cycling between -40°C and 125°C junction temperature may exacerbate fatigue, so consider underfill if the application exceeds typical under-dash conditions.
How does the LM43600AQPWPTQ1 compare to the LM43603 in a space-constrained 500mA design, and when should I avoid downgrading?
The LM43600AQPWPTQ1 is a 500mA version of the LM43603 (3A), sharing the same package, pinout, and control architecture, which enables drop-in compatibility for lower-current applications. However, downgrading to the LM43600AQPWPTQ1 reduces peak efficiency at higher loads (>300mA) and limits transient response capability due to lower peak current handling. Avoid this substitution if your system experiences short-duration load spikes above 600mA, as the LM43600AQPWPTQ1 may enter current limit or thermal shutdown. Also, the smaller current rating means the internal power FETs are optimized for lower conduction losses, resulting in slightly higher RDS(on)—verify dropout voltage and thermal rise under worst-case ambient temperatures before committing to the lower-cost option.
What design constraints should I consider when operating the LM43600AQPWPTQ1 near its minimum 1V output voltage with a 3.5V input?
Operating the LM43600AQPWPTQ1 at a 1V output with a 3.5V input pushes the duty cycle to approximately 28%, which is within spec but reduces margin for stability and transient response. At such low output voltages, feedback trace routing becomes critical—any noise or resistance in the FB path can cause significant output deviation. Use a Kelvin connection directly to the output capacitor and keep the feedback resistors close to the IC. Additionally, the internal slope compensation may be less effective at very low VOUT, increasing the risk of subharmonic oscillation if the inductor value is too small; follow TI’s recommended minimum inductance (typically ≥4.7µH) even if load current is low. Always test line and load regulation under cold-start conditions, as input voltage dips below 3.5V during engine cranking could push the regulator into dropout.
Is it safe to parallel two LM43600AQPWPTQ1 devices to increase output current beyond 500mA in a redundant automotive power system?
Paralleling two LM43600AQPWPTQ1 regulators is not recommended due to lack of current-sharing circuitry and potential for instability. The devices do not synchronize their switching phases, which can lead to beat frequencies, increased ripple, and uneven thermal loading. Even with matched feedback networks, minor variations in reference voltage or propagation delay can cause one regulator to carry significantly more current, risking premature thermal shutdown. Instead, consider upgrading to a higher-current SIMPLE SWITCHER® like the LM43601 (1A) or LM43602 (2A) in the same footprint, or use a dedicated multi-phase controller. If redundancy is the goal, implement separate input fusing and output ORing diodes rather than direct parallel connection to maintain fault isolation and compliance with automotive functional safety requirements.
Quality Assurance (QC)
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LM43600AQPWPTQ1 CAD Models
Texas Instruments LM43600AQPWPTQ1 PCB symbols & footprints
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