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PQ1X291M2ZP
Sharp Microelectronics
IC REG LINEAR 2.9V 150MA SOT23-5
3384 Pcs New Original In Stock
Switching Regulator IC Output
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*Quantity
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Minimum 1
5.0 / 5.0
- (84 Ratings)
PQ1X291M2ZP
Product Overview
5824931
DiGi Electronics Part Number
PQ1X291M2ZP-DGManufacturer
Sharp Microelectronics
PQ1X291M2ZP
Description
IC REG LINEAR 2.9V 150MA SOT23-5Inventory
3384 Pcs New Original In Stock
Switching Regulator IC Output
Quantity
Minimum 1
Minimum 1
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PQ1X291M2ZP Technical Specifications
Category
Power Management (PMIC), Voltage Regulators - DC DC Switching Regulators
Packaging
Cut Tape (CT)
Series
*
Product Status
Obsolete
Base Product Number
PQ1X291
Datasheet & Documents
HTML Datasheet
PQ1X291M2ZP-DG
Environmental & Export Classification
Moisture Sensitivity Level (MSL)
1 (Unlimited)
ECCN
EAR99
HTSUS
8542.39.0001
Additional Information
Other Names
1149-PQ1X291M2ZPCT
425-1712-2-DG
425-PQ1X291M2ZPDKR-DG
425-1712-1-DG
425-PQ1X291M2ZPTR
1149-PQ1X291M2ZPDKR
425-PQ1X291M2ZPDKR
1149-PQ1X291M2ZPTR
425-1712-2
425-1712-1
Standard Package
3,000
Reviews
5.0/5.0-(Show up to 5 Ratings)
December 02, 2025
Les matériaux utilisés dans la fabrication assurent une excellente résistance à l’usure quotidienne.
December 02, 2025
Je recommande vivement DiGi Electronics pour leurs emballages respectueux de la nature et leurs prix raisonnables. Une vraie entreprise responsable.
December 02, 2025
迅速発送していただき、期日までに必要な電子部品を手に入れることができました。
December 02, 2025
Their excellent after-sales support helps me maximize the value of my purchases.
December 02, 2025
DiGi Electronics offers unbeatable prices that make shopping affordable without compromising quality. Truly a value-oriented retailer!
December 02, 2025
The site layout is clean and organized, enhancing the overall shopping experience.
December 02, 2025
The customer support staff demonstrates genuine care and efficiency.
December 02, 2025
Quick and safe delivery ensures I receive top-quality electronics that last for years.
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Frequently Asked Questions (FAQ)
Can I safely replace the obsolete PQ1X291M2ZP with a modern LDO like the TPS7B6925 in a 3.3V to 2.9V step-down linear regulation design?
Yes, but with key design-in considerations: the PQ1X291M2ZP is actually a switching regulator, not a standard LDO, despite its SOT23-5 package and similar voltage output. Replacing it with an LDO like the TPS7B6925 limits you to linear regulation, which reduces efficiency under higher input-output differentials. For a direct functional replacement, consider a current-mode switching regulator with ~2.9V fixed output and similar 150mA current capability, such as the AP2112K-2.9, ensuring input voltage range and transient response match your application requirements to avoid undervoltage issues in battery-powered systems.
What are the PCB layout and thermal risks when using the PQ1X291M2ZP in high-density portable designs?
The PQ1X291M2ZP in SOT23-5 has limited thermal dissipation due to its small package. Even at 150mA, switching losses and VIN-VOUT differentials above 1.5V can increase junction temperature—especially in enclosed or stacked-board assemblies. Mitigate risks by using at least two thermal vias beneath the exposed pad (if present) and keep power traces short. Avoid placing heat-sensitive components nearby. Derate maximum load current if ambient exceeds 60°C or airflow is restricted.
Is the PQ1X291M2ZP suitable for noise-sensitive analog circuits like RF transceivers or precision ADCs?
Use caution: although the PQ1X291M2ZP is a switching regulator, its compact form factor may lack integrated EMI filters, potentially introducing switching noise into sensitive analog nodes. In RF or precision measurement systems, this can degrade signal-to-noise ratio. If using it, add an LC filter (e.g., 10μH shielded inductor + low-ESR ceramic cap) at the output and isolate its ground return path. For low-noise applications, consider replacing it with a dedicated low-noise LDO such as the MCP1703-2.9 after evaluating efficiency trade-offs.
How do I handle long-term reliability and component obsolescence when designing in the discontinued PQ1X291M2ZP?
Since the PQ1X291M2ZP is marked as obsolete, long-term reliability depends on supply chain stability. With 3300 pcs available, it may suffice for low-volume or legacy repairs, but not for new high-volume designs. To mitigate risk: 1) Secure lifetime buys from authorized stockists; 2) Design a drop-in footprint that supports pin-compatible alternatives (e.g., 5-pin SOT23 PMICs with 2.9V output); 3) Evaluate functional replacements like the XC6206P291MR (2.9V, 200mA) with matching enable and low-quiescent-current performance, verifying startup timing in always-on sensor nodes.
What are the selection trade-offs between the PQ1X291M2ZP and buck converters such as the SPX3819 when regulating down to 2.9V from 5V?
The PQ1X291M2ZP, despite being labeled a 'linear regulator' in some directories, functions as a switching regulator—offering better efficiency than true linear options like the SPX3819 under 5V-to-2.9V conversion. The SPX3819, a linear regulator, will dissipate ~315mW at 150mA, requiring thermal management. In contrast, the PQ1X291M2ZP likely maintains >80% efficiency due to switching action. However, its obsolescence and lack of datasheet accessibility increase design-in risk. For new designs, prefer active, well-documented switchers like the TPS62748 with 2.9V adjustable output and comparable current rating.
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.
PQ1X291M2ZP CAD Models
Sharp Microelectronics PQ1X291M2ZP PCB symbols & footprints
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