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PQ1X331M2ZPH
Sharp Microelectronics
IC REG LINEAR 3.3V 150MA SOT23-5
20156 Pcs New Original In Stock
Linear Voltage Regulator IC Positive Fixed 1 Output 150mA SOT-23-5
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5.0 / 5.0
- (128 Ratings)
PQ1X331M2ZPH
Product Overview
7925651
DiGi Electronics Part Number
PQ1X331M2ZPH-DGManufacturer
Sharp Microelectronics
PQ1X331M2ZPH
Description
IC REG LINEAR 3.3V 150MA SOT23-5Inventory
20156 Pcs New Original In Stock
Linear Voltage Regulator IC Positive Fixed 1 Output 150mA SOT-23-5
Quantity
Minimum 1
Minimum 1
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PQ1X331M2ZPH Technical Specifications
Category
Power Management (PMIC), Voltage Regulators - Linear, Low Drop Out (LDO) Regulators
Packaging
-
Series
-
Product Status
Obsolete
Output Configuration
Positive
Output Type
Fixed
Number of Regulators
1
Voltage - Input (Max)
9V
Voltage - Output (Min/Fixed)
3.3V
Voltage - Output (Max)
-
Voltage Dropout (Max)
0.4V @ 150mA
Current - Output
150mA
Current - Quiescent (Iq)
200 µA
PSRR
70dB (400Hz)
Control Features
Enable
Protection Features
Over Current, Over Temperature
Operating Temperature
-30°C ~ 85°C
Mounting Type
Surface Mount
Package / Case
SC-74A, SOT-753
Supplier Device Package
SOT-23-5
Base Product Number
PQ1X
Datasheet & Documents
HTML Datasheet
PQ1X331M2ZPH-DG
Environmental & Export Classification
Moisture Sensitivity Level (MSL)
1 (Unlimited)
ECCN
EAR99
HTSUS
8542.39.0001
Additional Information
Other Names
425-2333-1
425-2333-2
425-2333-6
Standard Package
3,000
Alternative Parts
PART NUMBER
MANUFACTURER
QUANTITY AVAILABLE
DiGi PART NUMBER
UNIT PRICE
SUBSTITUTE TYPE
Reviews
5.0/5.0-(Show up to 5 Ratings)
December 02, 2025
Post-purchase support has been smooth, making the overall experience excellent.
December 02, 2025
The affordability of their products really sets them apart from others in the market.
December 02, 2025
I value their commitment to transparency, making my purchasing decisions easier.
December 02, 2025
I love how transparent their logistics tracking process is.
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Frequently Asked Questions (FAQ)
Can the PQ1X331M2ZPH be used in battery-powered designs where quiescent current affects runtime, and how does it compare to low-Iq alternatives like the LP2985-33DBVT?
Yes, the PQ1X331M2ZPH draws 200 µA quiescent current, which is moderate for portable applications, but may impact long-term battery life in ultra-low-power systems. In comparison, the LP2985-33DBVT offers only 50 µA Iq, making it a better choice for extended battery operation. Use PQ1X331M2ZPH only if your design prioritizes cost and simplicity over minimal power consumption, and ensure the enable pin is actively controlled to disable the regulator during idle states to mitigate unnecessary drain.
What thermal risks should I consider when using the PQ1X331M2ZPH in a high-ambient-temperature environment, and how can PCB layout reduce thermal stress?
The PQ1X331M2ZPH has no internal thermal shutdown hysteresis specification, so repeated thermal shutdown cycles can occur under sustained high load and ambient temperatures near 85°C. To minimize risk, verify power dissipation: with a 9V input and 3.3V@150mA output, dropout power is (9V – 3.3V − 0.4V) × 0.15A ≈ 0.795W. Use a sufficient copper pour connected to GND and VIN pins, employ thermal vias, and avoid placing near heat sources. Derate load current by 30–40% if ambient exceeds 60°C to prevent thermal runaway.
Is the PQ1X331M2ZPH suitable as a drop-in replacement for the LP2985-33DBVR in existing designs, and what pinout or functional differences should I watch for?
The PQ1X331M2ZPH is not a drop-in replacement for the LP2985-33DBVR despite similar SOT-23-5 packaging. Pin functions differ: PQ1X331M2ZPH typically uses pin 3 for enable, while LP2985 uses pin 5; incorrect connection can disable or damage the circuit. Additionally, LP2985 offers lower noise and better PSRR (75dB vs. 70dB at 400Hz). Redesign the layout and verify control signal routing before substitution, and simulate transient response to confirm stability with your output capacitor.
How does the 0.4V dropout voltage of the PQ1X331M2ZPH impact performance in aging battery applications, and at what input voltage should I expect regulation to fail?
With a 0.4V dropout at 150mA, PQ1X331M2ZPH maintains 3.3V output only as long as VIN ≥ 3.7V. In battery-powered systems using 2× alkaline cells (nominal 3V), regulation fails early in discharge, limiting usable battery capacity. For longer runtime, consider a low-dropout alternative with ≤200mV dropout. Monitor battery voltage and use the enable pin to signal a microcontroller when VIN approaches 3.7V, allowing graceful shutdown or power mode transitions.
Given that the PQ1X331M2ZPH is marked as obsolete, what long-term reliability and supply chain risks should I consider for new or high-volume designs?
Using the PQ1X331M2ZPH in new designs poses significant supply chain risks due to its obsolete status—long-term availability is not guaranteed, and 'new original' stock may be limited or unreliable. For high-volume or long-lifecycle products, consider upgrading to active pin-to-pin alternatives like the LP2985-33DBVT or TPS78233. If required for legacy support, qualify second-source options, buffer inventory with extended shelf-life controls, and update BOMs to include obsolete component risk mitigation documentation.
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.
PQ1X331M2ZPH CAD Models
Sharp Microelectronics PQ1X331M2ZPH PCB symbols & footprints
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