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PQ1X281M2ZP
Sharp Microelectronics
IC REG LINEAR 2.8V 150MA SOT23-5
6444 Pcs New Original In Stock
Switching Regulator IC Output
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*Quantity
Minimum 1
Minimum 1
5.0 / 5.0
- (268 Ratings)
PQ1X281M2ZP
Product Overview
5824933
DiGi Electronics Part Number
PQ1X281M2ZP-DGManufacturer
Sharp Microelectronics
PQ1X281M2ZP
Description
IC REG LINEAR 2.8V 150MA SOT23-5Inventory
6444 Pcs New Original In Stock
Switching Regulator IC Output
Quantity
Minimum 1
Minimum 1
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PQ1X281M2ZP Technical Specifications
Category
Power Management (PMIC), Voltage Regulators - DC DC Switching Regulators
Packaging
Cut Tape (CT)
Series
*
Product Status
Obsolete
Base Product Number
PQ1X281
Datasheet & Documents
HTML Datasheet
PQ1X281M2ZP-DG
Environmental & Export Classification
RoHS Status
RoHS non-compliant
Moisture Sensitivity Level (MSL)
1 (Unlimited)
ECCN
EAR99
HTSUS
8542.39.0001
Additional Information
Other Names
1149-PQ1X281M2ZPTR
1149-PQ1X281M2ZPCT
425-PQ1X281M2ZPTR
425-1711-1-DG
425-PQ1X281M2ZPDKR
425-1711-2-DG
425-1711-1
425-1711-2
1149-PQ1X281M2ZPDKR
425-PQ1X281M2ZPDKR-DG
Standard Package
3,000
Alternative Parts
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MANUFACTURER
QUANTITY AVAILABLE
DiGi PART NUMBER
UNIT PRICE
SUBSTITUTE TYPE
Reviews
5.0/5.0-(Show up to 5 Ratings)
December 02, 2025
物流配送速度令人驚喜，基本上都能在預期時間內到達，令人滿意。
December 02, 2025
Their customer support team resolved my issue promptly, making the shopping experience very smooth.
December 02, 2025
Their quick shipping and attentive support truly stand out in the industry.
December 02, 2025
Fast shipping meant I could enjoy my product sooner than anticipated.
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Frequently Asked Questions (FAQ)
Can the PQ1X281M2ZP be used as a direct replacement for the LP2985-28DBVT in a space-constrained portable design, and what design-in risks should I consider given its obsolete status?
While the PQ1X281M2ZP provides a similar 2.8V fixed output and 150mA rating comparable to the LP2985-28DBVT, it is not a pin-to-pin or functionally identical replacement. The PQ1X281M2ZP lacks enable control and has different internal compensation, which may affect start-up behavior and transient response in sensitive analog circuits. Due to its obsolete status, long-term availability is a significant risk—designs should plan for last-time buys or redesigns. For new designs, consider the LP2985IM5-2.8/NOPB as a more reliable alternative with better support and comparable SOT23-5 packaging with enable functionality and superior PSRR performance.
What are the reliability concerns when using the PQ1X281M2ZP in a high-temperature industrial application near its maximum operating temperature?
The PQ1X281M2ZP is rated for operation up to 85°C ambient, but without active airflow or thermal vias, the junction temperature can exceed safe limits under full 150mA load due to power dissipation in the SOT23-5 package. For industrial environments where ambient exceeds 70°C, derate the output current by at least 30% or implement copper pour for heat spreading. Monitor thermal shutdown behavior—it may cycle under fault conditions, causing system instability. Consider the LP2985IM5X-2.8/NOPB as a drop-in alternative with better thermal performance and active current limiting.
How does the RoHS non-compliance of the PQ1X281M2ZP impact compliance in new product designs targeting EU or consumer markets?
The RoHS non-compliance of the PQ1X281M2ZP restricts its use in consumer electronics, medical devices, or any product requiring CE or similar environmental certification for EU markets. Even if technically suitable, using this part can lead to regulatory rejection or supply chain disqualification. Given its obsolete status, sourcing for production runs increases risk. For compliance, evaluate the LP2985IM5-2.8/NOPB or LP2985IM5X-2.8/NOPB, both RoHS-compliant alternatives with equivalent output voltage and improved EMI performance in the same footprint.
What are the key trade-offs when selecting the PQ1X281M2ZP over modern LDOs like the LP2985-28DBVR in battery-powered sensor nodes?
The PQ1X281M2ZP has no enable pin and higher quiescent current (approximately 85µA) compared to the LP2985-28DBVR (~75µA with enable logic), reducing battery life in duty-cycled applications. It also lacks current foldback and thermal foldback protection, increasing risk during short-circuit events. While both are 150mA LDOs in SOT23-5 packages, the LP2985-28DBVR offers better transient response and PSRR, making it more suitable for RF or precision ADC power rails. The PQ1X281M2ZP should only be used in legacy rework or ultra-low-cost, low-volume systems where lifespan is not critical.
What PCB layout practices should I follow to minimize noise and stability issues when integrating the PQ1X281M2ZP in a mixed-signal audio amplifier supply?
To ensure stability with the PQ1X281M2ZP, place a 1µF X7R ceramic capacitor as close as possible to the input pin with minimal trace length, and use a 4.7µF output capacitor to prevent oscillation—avoid using tantalum or low-ESR polymer types that may destabilize the internal feedback. Keep the ground path short and avoid routing noisy digital signals beneath the device. Since the PQ1X281M2ZP lacks a bypass pin, add a 10nF capacitor from output to ground if powering sensitive analog circuits. For audio applications, consider replacing with the LP2985IM5X-2.8/NOPB, which has superior noise performance and built-in noise reduction.
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.
PQ1X281M2ZP CAD Models
Sharp Microelectronics PQ1X281M2ZP PCB symbols & footprints
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