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ADP3181JRUZ-REEL
onsemi
IC REG CTRLR VRM9 4OUT 28TSSOP
5147 Pcs New Original In Stock
- Controller, Intel VRM9, VRM10 Voltage Regulator IC 4 Output 28-TSSOP
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Minimum 1
Minimum 1
5.0 / 5.0
- (153 Ratings)
ADP3181JRUZ-REEL
Product Overview
7744695
DiGi Electronics Part Number
ADP3181JRUZ-REEL-DGManufacturer
onsemi
ADP3181JRUZ-REEL
Description
IC REG CTRLR VRM9 4OUT 28TSSOPInventory
5147 Pcs New Original In Stock
- Controller, Intel VRM9, VRM10 Voltage Regulator IC 4 Output 28-TSSOP
Quantity
Minimum 1
Minimum 1
Purchase and inquiry
Warranty & Returns
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365 - Day Quality Guarantee - Every part fully backed.
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ADP3181JRUZ-REEL Technical Specifications
Category
Power Management (PMIC), Special Purpose Regulators
Packaging
-
Series
-
Product Status
Obsolete
Applications
Controller, Intel VRM9, VRM10
Voltage - Input
12V
Number of Outputs
4
Voltage - Output
0.7V ~ 3.1V
Operating Temperature
0°C ~ 85°C
Mounting Type
Surface Mount
Package / Case
28-TSSOP (0.173", 4.40mm Width)
Supplier Device Package
28-TSSOP
Base Product Number
ADP3181
Datasheet & Documents
HTML Datasheet
ADP3181JRUZ-REEL-DG
Environmental & Export Classification
Moisture Sensitivity Level (MSL)
3 (168 Hours)
REACH Status
REACH Unaffected
ECCN
EAR99
HTSUS
8542.39.0001
Additional Information
Other Names
ADP3181JRUZREELCT
ADP3181JRUZREELTR
ADP3181JRUZREEL
Standard Package
2,500
Reviews
5.0/5.0-(Show up to 5 Ratings)
Dec 02, 2025
いつもスピーディに届けてくれるので、ビジネスにも大変役立っています。
Dec 02, 2025
Affordable pricing combined with dependable performance makes DiGi Electronics my go-to choice.
Dec 02, 2025
Their after-sales team goes above and beyond to ensure customer satisfaction.
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Frequently Asked Questions (FAQ)
Can the ADP3181JRUZ-REEL be used as a direct replacement for the ISL6522 in a VRM9-compliant CPU power design, and what design-in risks should be considered?
The ADP3181JRUZ-REEL can functionally replace the ISL6522 in VRM9 applications due to similar control architecture and Intel VRM9/VRM10 compliance. However, careful review of the gate driver strength and feedback compensation networks is required—differences in error amplifier gain and response may affect transient performance. Additionally, the ADP3181JRUZ-REEL is marked as obsolete, so long-term supply chain risk must be mitigated with lifecycle planning or alternative sourcing. Always validate loop stability under dynamic load steps in your layout.
What are the thermal design implications of using the ADP3181JRUZ-REEL in a 4-phase buck converter at full load, particularly with high ambient temperatures?
The ADP3181JRUZ-REEL is housed in a 28-TSSOP package with limited thermal dissipation capability. While it controls external MOSFETs and doesn't carry load current directly, internal circuitry and gate drive activity contribute to self-heating. In a densely packed 4-phase design with ambient temperatures approaching 85°C, ensure adequate PCB copper vias and grounding planes to improve thermal conduction. Monitor die temperature via thermal testing under worst-case operating conditions to prevent derating or protection triggering.
How does the input voltage regulation performance of the ADP3181JRUZ-REEL respond to sudden 12V rail transients, and what input filtering is recommended?
The ADP3181JRUZ-REEL relies on a stable 12V input for accurate output regulation, but rapid transients on this rail can disrupt gate drive timing and affect current sensing accuracy. To mitigate risk, use bulk and high-frequency ceramic capacitors near the VIN pin to dampen ringing. Implementing a dedicated LDO or local input filter—not just relying on system-level 12V regulation—improves robustness. Pay close attention to layout symmetry across the four output phases to prevent unequal transient response.
When integrating the ADP3181JRUZ-REEL into a VRM10 motherboard design, what are the key PCB layout constraints to ensure reliable multiphase operation?
Successful integration of the ADP3181JRUZ-REEL demands strict attention to layout symmetry across all four phases. Critical nodes—current sense traces, feedback dividers, and gate drive loops—must be kept short and matched in length to avoid phase imbalance and current runaway. Use Kelvin connections for the sense resistors and shield sensitive analog traces from noisy power paths. Given its surface-mount 28-TSSOP package, ensure sufficient thermal relief and avoid excessive solder voiding during reflow to maintain reliability.
Is the onsemi ADP3181JRUZ-REEL suitable for new designs given its obsolete status, and what are the reliability concerns over 10+ years in industrial applications?
While the ADP3181JRUZ-REEL performs well electrically for VRM9/VRM10 CPU power applications, its obsolete status poses significant long-term reliability and supply risks—especially for industrial or embedded systems with extended lifecycles. Although onsemi may have last-time buys available, component obsolescence increases the likelihood of counterfeit parts entering the supply chain. For new designs, consider actively pin-compatible alternatives like the MP2145 or similar modern controllers with active production status, unless using existing qualified inventory for repair or legacy system continuation.
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.
ADP3181JRUZ-REEL CAD Models
onsemi ADP3181JRUZ-REEL PCB symbols & footprints
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