PI3323-00-LGIZ - 22A ZVS Buck Regulator, 42Vin 3.3Vout | Vicor
MPN: PI3323-00-LGIZ ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $48.5 | $48.50 |
| 10 | $43.2 | $432.00 |
| 100 | $37.95 | $3,795.00 |
| 500 | $33.1 | $16,550.00 |
| 1,000 | $29.4 | $29,400.00 |
PI3323-00-LGIZ Overview
What is a ZVS buck regulator? ZVS (Zero-Voltage Switching) is a soft-switching topology that forces the MOSFETs to switch only when the drain-to-source voltage is approximately zero. This dramatically reduces switching losses and EMI compared to conventional hard-switched buck converters, allowing the regulator to run at high switching frequencies without sacrificing efficiency. A buck regulator itself is a step-down DC-DC converter that produces a lower output voltage from a higher input rail; these converters belong to the broader family of switched-mode power supplies and power management ICs.
Key features of the PI3323-00-LGIZ include the wide 14 V-42 V input range, the fixed 3.3 V output with 22 A current capability, and a high switching frequency that lets the user keep the output filter small. The integrated SiP layout removes the need for an external MOSFET bridge and bootstrap circuitry, simplifying layout, reducing BOM count, and accelerating time-to-market. The 110-BLGA module is reflow-solderable and mounts on standard PCB assembly lines.
Typical applications for this part include 48 V-input telecom rails stepping down to a 3.3 V point-of-load, industrial 24 V-36 V bus systems feeding FPGAs, ASICs, and high-current logic, server and embedded-computing intermediate bus conversion, and high-current test and measurement loads. The combination of high power density and high efficiency makes it attractive where board area and thermal budget are tight.
When designing with the PI3323-00-LGIZ, follow the manufacturer's layout guidance for the input/output capacitors and the thermal land pattern. The wide input range (down to 14 V) requires adequate input capacitance to handle transient bus events, and the 22 A output stage needs sufficient PCB copper or forced-air cooling to keep the module within its rated temperature window.
This page consolidates distributor pricing, cross-references to other PI33xx output-voltage variants, and practical design notes sourced from the Vicor datasheet to help engineers select the right part for high-current 3.3 V point-of-load applications.
Drop-in alternatives for PI3323-00-LGIZ — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PI3325-00-LGIZ
✅ Drop-In📋 Reference alternative (not in catalog)
PI3318-00-LGIZ
✅ Drop-In📋 Reference alternative (not in catalog)
PI3310-00-LGIZ
✅ Drop-In📋 Reference alternative (not in catalog)
PI3323-00-LGMZ
✅ Drop-In📋 Reference alternative (not in catalog)
PI3302-00-LGIZ
✅ Drop-In✓ In Stock
$19.75 / Unit
View Datasheet →PI3323-00-LGIZ Maximum Ratings & Electrical Characteristics
| Topology | ZVS Buck (step-down, non-isolated) |
| Input Voltage Range | 14 V to 42 V |
| Output Voltage | 3.3 V (fixed) |
| Output Current (Continuous) | 22 A |
| Operating Temperature Range | -55 C to +125 C (Mouser listing) |
| Package / Mounting | 110-BLGA module, surface mount (14 mm x 10 mm) |
| Package Type (per LCSC) | LGA-110 (14x10) |
| Number of Outputs | 1 |
| Output Type | Fixed |
| Polarity | Positive |
| Isolation | Non-isolated (point-of-load) |
| Soft Switching | Zero-Voltage Switching (ZVS) |
| Mounting Type | Surface Mount |
PI3323-00-LGIZ lga-110 (14x10) Pin Configuration Guide
Pin configuration for PI3323-00-LGIZ (lga-110 (14x10) package). This power device features gate, drain, and source terminals. For non-polarized packages, refer to the manufacturer datasheet for exact pin 1 orientation and footprint details. Common applications include power supply design, motor driving, and load switching.
No detailed pinout data available for PI3323-00-LGIZ.
Refer to the datasheet for full pin configuration.
Typical Applications
PI3323-00-LGIZ is suitable for 6 applications: 48 V Intermediate Bus to 3.3 V Point-of-Load, 24 V Industrial Bus to 3.3 V Load, High-Efficiency Server/Embedded 3.3 V Bulk Rail, Test & Measurement Bench Power (3.3 V / 22 A), Aerospace & Defense Avionics 3.3 V Distribution, Medical Imaging & Diagnostic Equipment.
48 V Intermediate Bus to 3.3 V Point-of-Load
The PI3323-00-LGIZ is purpose-built for stepping a 36 V-42 V intermediate bus down to a high-current 3.3 V rail on telecom and datacenter boards. With a 14 V-42 V input range and 22 A continuous output, the part comfortably serves modern ASICs, FPGAs, and switch-fabric ASICs that need tens of amps at 3.3 V from a high-voltage bus. The ZVS topology keeps switching losses low at high frequency, allowing the output filter to be reduced to a few ceramic capacitors. PCB layout must allocate adequate copper pour for the 110-BLGA module to dissipate the conversion loss.
Recommended
24 V Industrial Bus to 3.3 V Load
On factory automation and industrial-control boards, the PI3323-00-LGIZ cleanly converts a 24 V industrial bus to a regulated 3.3 V at up to 22 A. The 14 V input lower bound keeps the part in regulation during nominal 24 V bus droop and many transient dips without brown-out. Compared to discrete 24 V buck designs, the integrated 110-BLGA SiP saves significant board area and simplifies EMI compliance. The -55 C to +125 C operating-temperature range supports outdoor and cab installations common to industrial control.
Recommended
High-Efficiency Server/Embedded 3.3 V Bulk Rail
For server and embedded-computing platforms, the PI3323-00-LGIZ provides a high-density 3.3 V bulk rail that intermediate POL regulators can later step down to sub-1 V CPU voltages. The 22 A continuous output in a 14x10 mm BLGA footprint enables the 3.3 V rail to be placed close to the load, minimizing distribution loss and improving transient response. ZVS switching reduces conducted EMI on the input, easing compliance in dense multi-board chassis. Pair the part with ceramic bulk capacitors on the 42 V side to handle bus transients.
Recommended
Test & Measurement Bench Power (3.3 V / 22 A)
Test-and-measurement instruments and bench programmers often need a stable, low-noise 3.3 V rail at tens of amps. The PI3323-00-LGIZ delivers 22 A at 3.3 V from a compact 110-BLGA module, leaving more board area for measurement front-ends and isolation barriers. The wide 14 V-42 V input range accepts both lab 24 V supplies and 36 V-42 V telecom-grade DC sources. The ZVS topology generates very little input ripple, which reduces false counts in sensitive measurement chains and high-accuracy ADCs.
Recommended
Aerospace & Defense Avionics 3.3 V Distribution
With its -55 C to +125 C operating-temperature rating and high-efficiency ZVS topology, the PI3323-00-LGIZ is well matched to aerospace and defense applications where thermal stress and efficiency at partial load matter. The part can take 28 V avionics bus and step it to a clean 3.3 V at 22 A for mission computers and avionics subsystems. The integrated SiP reduces the BOM count, a benefit for reliability programs that count part population. Confirm HIREL/space-grade screening with Vicor for flight-qualified builds.
Recommended
Medical Imaging & Diagnostic Equipment
High-current 3.3 V rails in medical imaging - MRI gradient drivers, CT scanner front-ends, and digital X-ray detectors - require both clean power and high power density. The PI3323-00-LGIZ supports these loads with 22 A continuous capability in a 110-BLGA footprint and ZVS switching to minimize EMI on nearby sensitive analog channels. The -55 C to +125 C operating range also fits thermal-stress profiles of well-ventilated imaging enclosures. Verify IEC 60601-1 medical safety compliance through the integrator, since it depends on the entire system architecture.
Recommended
Recommended Products Summary
Engineering reference data for PI3323-00-LGIZ — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PI3325-00-LGIZ | PI3318-00-LGIZ | PI3310-00-LGIZ | PI3323-00-LGMZ | PI3302-00-LGIZ |
|---|---|---|---|---|---|---|
| Package | 110-BLGA (14x10 mm) | 110-BLGA (14x10 mm) - same | 110-BLGA (14x10 mm) - same | 110-BLGA (14x10 mm) - same | 110-BLGA (14x10 mm) - same | 110-BLGA (14x10 mm) - same |
| Brand | Vicor | Vicor | Vicor | Vicor | Vicor | Vicor |
| Topology | ZVS Buck (non-isolated) | ZVS Buck (non-isolated) - same | ZVS Buck (non-isolated) - same | ZVS Buck (non-isolated) - same | ZVS Buck (non-isolated) - same | ZVS Buck (non-isolated) - same |
| Input Voltage Range | 14 V - 42 V | 14 V - 42 V (PI33xx family) | 14 V - 42 V (PI33xx family) | 14 V - 42 V (PI33xx family) | 14 V - 42 V (PI33xx family) | 14 V - 42 V (PI33xx family) |
| Output Voltage | 3.3 V fixed | 5.0 V fixed | 1.8 V fixed | 1.0 V fixed | 3.3 V fixed (same die, packaging suffix variant) | 1.2 V fixed |
| Output Current | 22 A | 22 A | 22 A | 22 A | 22 A | 22 A |
| Operating Temperature Range | -55 C to +125 C | -55 C to +125 C (same family) | -55 C to +125 C (same family) | -55 C to +125 C (same family) | -55 C to +125 C (same family) | -55 C to +125 C (same family) |
| Packaging Suffix | LGIZ | LGIZ | LGIZ | LGIZ | LGMZ (alt reel/mark) | LGIZ |
| Mounting | Surface Mount (BLGA) | Surface Mount (BLGA) | Surface Mount (BLGA) | Surface Mount (BLGA) | Surface Mount (BLGA) | Surface Mount (BLGA) |
Key Differentiators
- Fixed 3.3 V output, 22 A in a 14x10 mm BLGA (vs PI3301-00-LGIZ)
- Same ZVS buck architecture and 22 A capability across the PI33xx family (vs PI3323-00-LGMZ)
- Higher power density than discrete 24 V-3.3 V buck designs (vs PI3525-00-LGIZ)
Design Notes
Estimated: at a 36 V input and 3.3 V / 22 A output (approx 72.6 W output) the PI3323-00-LGIZ must dissipate the VIN-VOUT conduction losses plus switching losses in the 110-BLGA module. Even with Vicor ZVS efficiency typically above 90%, plan for roughly 8-15 W dissipation inside the BLGA. Follow the PI33xx datasheet's thermal land-pattern and copper-pour recommendations and consider airflow to keep the module within its -55 C to +125 C operating envelope.
Layout is critical for the 110-BLGA module: place input and output ceramic capacitors as close to the package as possible, use multiple vias for the BLGA thermal/ground pads, and avoid routing high-edge-rate traces under the module. The PI33xx datasheet's layout section shows the recommended stackup and via pattern to keep EMI low - replicating these guidelines is essential for first-pass EMI compliance, since the part's high switching frequency will couple noise into improperly placed traces.
Do not assume the 3.3 V output is adjustable - the PI3323-00-LGIZ is a fixed-output variant and output voltage cannot be trimmed externally. Confusing the PI3323 (3.3 V) with PI3325 (5.0 V) or PI3318 (1.8 V) will produce a damaged load. Also, do not exceed the 42 V input absolute maximum - 48 V telecom transients will destroy the module. Use proper hold-up and clamping circuits if the source can spike above 42 V.
The wide 14 V-42 V input range means the PI3323-00-LGIZ can ride through brown-outs on 24 V industrial buses but will hit the duty-cycle limit near the upper end. Provide adequate input capacitance (per the datasheet's typical-application circuit) to source the 22 A load transient without dipping VIN below 14 V. Estimate: a 100 us, 22 A step draws 2.2 mC; with a 1 V droop budget you need at least 2200 uF of ceramic/bulk on the input.
Compliance Information
Compliance was not stated in the verified web snippets; confirm RoHS, REACH, lead-free, halogen-free status from the official Vicor datasheet or by contacting Vicor. AEC-Q100 is not applicable - this is a power module, not an automotive-qualified IC.
