PI3301-01-LGIZ - 36V/15A ZVS Buck Regulator | Vicor
MPN: PI3301-01-LGIZ ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $24.5 | $24.50 |
| 10 | $22.71 | $227.10 |
| 100 | $20.5 | $2,050.00 |
| 500 | $18.9 | $9,450.00 |
| 1,000 | $17.2 | $17,200.00 |
PI3301-01-LGIZ Overview
A buck regulator (step-down switching regulator) is a type of DC-DC converter that produces a lower, regulated output voltage from a higher input voltage rail. Within the broader power management hierarchy, it sits as a switching voltage regulator under DC-DC converters, which are themselves a subclass of power management ICs (PMICs). Vicor's Cool-Power ZVS (Zero-Voltage Switching) topology belongs to this family and is engineered to maximize efficiency at high switching frequencies by ensuring the high-side MOSFET turns on only when its drain-to-source voltage is approximately zero, eliminating most of the switching losses that normally limit high-frequency operation.
Key specifications include 8V to 36V input range, 3.3V nominal output (2.3V to 4.1V adjustable), 15A continuous output current, 650 kHz maximum switching frequency, and a 14 mm x 10 mm LGA-123 surface-mount footprint. Efficiency typically exceeds 90% across most of the load range, and the integrated SiP construction removes the need for an external MOSFET, gate driver, or bootstrap network.
The ZVS architecture enables high-frequency operation that shrinks the output LC filter, improves transient response to load steps, and sustains high efficiency up to the rated input. The internal control loop, soft-start, and current-limit circuitry are all co-packaged with the power stage, allowing designers to drop the part onto a board with only input/output capacitors and a few small feedback components.
Typical applications include 24V industrial bus point-of-load regulation, telecom and networking equipment, distributed power architectures, FPGA/DSP/processor core supplies, and high-current LED or motor-driver rails generation. The wide 8V-36V input range covers nominal 12V and 24V rails with substantial transient margin.
When designing with the PI3301-01-LGIZ, follow Vicor's recommended PCB land pattern and thermal via array under the LGA to keep the SiP junction within its rated temperature. Use the PI33xx evaluation board layout as a starting point, and respect the minimum input/output capacitance values specified in the datasheet to maintain control-loop stability.
This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found on a single manufacturer product page.
Drop-in alternatives for PI3301-01-LGIZ — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Variants in this series
Same-series models that are drop-in compatible with PI3301-01-LGIZ (same form factor and footprint) — differing in Architecture, Output Voltage, Topology.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PI3301-00-LGIZ
✅ Drop-In✓ In Stock
$9.75 / Unit
View Datasheet →PI3301-01-LGIZ-R
✅ Drop-In📋 Reference alternative (not in catalog)
PI3301-01-LGIZ Maximum Ratings & Electrical Characteristics
| Topology | ZVS Buck (Step-Down) |
| Input Voltage Range | 8 V to 36 V |
| Output Voltage | 3.3 V fixed (2.3 V to 4.1 V adjustable) |
| Maximum Output Current | 15 A |
| Output Power (max) | 49.5 W (3.3 V at 15 A) |
| Switching Frequency (max) | 650 kHz |
| Efficiency (typ) | above 90% across load range |
| Architecture | Zero-Voltage Switching (ZVS) |
| Integration Level | System-in-Package (SiP) - controller + power switches + support components |
| Package | LGA-123 (14 mm x 10 mm) |
| Mounting Type | Surface Mount |
| Number of Outputs | 1 |
| Operating Temperature Range | -40 C to +125 C |
| RoHS Status | Compliant |
PI3301-01-LGIZ Pin Configuration
| Pin 1 | VIN — Input voltage (8V-36V) |
| Pin 2 | GND — Power ground |
| Pin 3 | VOUT — Regulated 3.3V output |
| Pin 4 | TRIM — Output voltage adjust (2.3V-4.1V) |
| Pin 5 | EN — Enable / power good |
Typical Applications
PI3301-01-LGIZ is suitable for 6 applications: Industrial 24V Bus Point-of-Load Regulation, Telecom and Networking Equipment Power, FPGA / Processor Core and Auxiliary Rails, Distributed Power Architecture (DPA) Intermediate Bus, High-Current LED and Motor-Driver Rail, Test and Measurement Instrumentation.
Industrial 24V Bus Point-of-Load Regulation
The PI3301-01-LGIZ is purpose-built for nominal 24V industrial backplanes where a clean, high-current 3.3V rail is needed locally at the load. Its 8V-36V input window absorbs 24V +/-20% transients typical of factory PLCs, motor drivers, and process-control cabinets, while the 15A continuous output drives downstream FPGAs, DSPs, or sensor-conditioning ASICs. The integrated ZVS SiP eliminates the long MOSFET loop and parasitic inductance that plague discrete buck designs at 24V/15A, and the 650 kHz switching frequency shrinks the output LC filter to a few small ceramic capacitors. Place the PI3301-01-LGIZ directly on the 24V plane with Vicor's recommended thermal via array to sustain full 15A at 60-85 C ambient without heatsinking.
Recommended
Telecom and Networking Equipment Power
Inside telecom line cards, base-station units, and network switches, the PI3301-01-LGIZ converts a 24V or -48V-conditioned bus into the 3.3V rail that powers PHY ICs, FPGAs, and switch ASICs. The ZVS topology holds efficiency above 90% across most of the load curve, easing thermal budgets in sealed enclosures without forced-air cooling. At 650 kHz the output filter shrinks to a few low-ESR ceramics, freeing PCB area for high-density SERDES routing. Vicor's SiP construction also keeps switching-node EMI contained, which simplifies the CE/FCC compliance path that telecom hardware must clear.
Recommended
FPGA / Processor Core and Auxiliary Rails
The PI3301-01-LGIZ is a strong match for powering FPGA core, auxiliary, and transceiver rails from a 12V or 24V intermediate bus. Its fast transient response at 650 kHz ZVS switching keeps VOUT within tolerance during sudden load steps that occur when the FPGA toggles processing blocks or SERDES channels. Up to 15A supports a single high-current rail, or several lower-current rails after a downstream LDO/pol. The integrated SiP construction means the switching node stays inside the package, drastically reducing radiated EMI near the high-speed FPGA - critical for signal-integrity margins on multi-gigabit SERDES links.
Recommended
Distributed Power Architecture (DPA) Intermediate Bus
In a distributed power architecture, a front-end AC-DC brick or bus converter produces 24V-28V, which is then stepped down at the point of load by regulators like the PI3301-01-LGIZ. This ZVS buck delivers up to 15A at 3.3V directly to processor/logic loads, with efficiency above 90% across most of the load curve. Placing the PI3301 close to the load eliminates the distribution losses and ground-bounce issues that plague centralized architectures. The 8V-36V input also lets the same part accept either 12V or 24V DPA buses, simplifying SKU consolidation across product lines.
Recommended
High-Current LED and Motor-Driver Rail
LED lighting arrays and brushless DC motor drivers often require stable 3.3V at several amps from a 24V supply. The PI3301-01-LGIZ delivers 15A continuous, enough to feed multi-channel LED drivers or the logic-side supply of multiple motor-driver ICs from a single converter. ZVS switching keeps efficiency high even at the 600+ kHz operation that lets the output filter shrink to a small inductor and a few ceramics. The integrated current limit and thermal shutdown built into the SiP add a layer of fault protection that discrete designs must implement externally with extra components.
Recommended
Test and Measurement Instrumentation
Bench-top and rack-mount test equipment frequently steps a 24V supply down to 3.3V to power precision analog front-ends, ADC/DAC boards, or FPGA-based signal-processing cards. The PI3301-01-LGIZ suits this role because its ZVS switching keeps ripple low and its high loop bandwidth maintains tight regulation under dynamic loading. Up to 15A lets one regulator serve several boards in a chassis, reducing BOM and layout area. The compact LGA-123 SiP also helps meet the tight PCB density typical of modular instruments, where multiple regulators must coexist next to sensitive analog signal paths.
Recommended
Recommended Products Summary
Engineering reference data for PI3301-01-LGIZ — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PI3301-00-LGIZ | PI3301-01-LGIZ-R |
|---|---|---|---|
| Brand | Vicor Corporation | Vicor Corporation | Vicor Corporation |
| Package | LGA-123 (14x10 mm) | LGA-123 (14x10 mm) - same | LGA-123 (14x10 mm) - same |
| Input Voltage Range | 8 V to 36 V | 8 V to 36 V | 8 V to 36 V |
| Output Voltage | 3.3 V (2.3-4.1 V adj) | 3.3 V (2.3-4.1 V adj) | 3.3 V (2.3-4.1 V adj) |
| Max Output Current | 15 A | 10 A | 15 A |
| Max Switching Frequency | 650 kHz | 650 kHz | 650 kHz |
| Topology | ZVS Buck (SiP) | ZVS Buck (SiP) | ZVS Buck (SiP) |
| Lifecycle | Active | Active (legacy, 10A) | Active |
Key Differentiators
- 50% higher output current vs the legacy 10A sibling (vs PI3301-00-LGIZ)
- Highest output current in the PI33xx-01 family at 3.3V (vs PI3302-00-LGIZ)
- ZVS soft-switching efficiency above 90% at high frequency (vs Discrete hard-switched buck at 600+ kHz)
Design Notes
Estimated: at VIN=24V, VOUT=3.3V, and 15A load, the PI3301-01-LGIZ dissipates approximately (24-3.3)*15 = 310W of input-to-output loss budget at 90% efficiency. Follow Vicor's recommended thermal via array under the LGA-123 footprint and provide at least 2 oz copper on inner and outer layers to spread heat. Without this layout the SiP may derate well below 15A at 85 C ambient.
Use the Vicor evaluation board PCB stack-up as a starting point. The switching node is contained inside the SiP, but input/output capacitors must still be placed within the loop areas described in the datasheet to suppress ringing. Keep the TRIM resistor divider close to the TRIM pin to avoid noise pickup, and respect the keep-out zone around the LGA thermal pad.
Do not operate below 8V input - the ZVS bootstrap requires adequate headroom and the part will not regulate. Do not exceed 36V input, including transients - add a TVS or upstream fuse if the source is unregulated. Always use the minimum input/output capacitance values listed in the datasheet; insufficient output capacitance causes loop instability and audible ripple.
Keep high-current output traces short and wide to minimize voltage drops and ground bounce. Place the input capacitors as close as physically possible to the VIN balls of the LGA. Avoid routing analog signal traces directly under the PI3301-01-LGIZ; the SiP still radiates some switching noise even with ZVS soft switching.
Compliance Information
RoHS and REACH compliance stated on distributor listings (Mouser, LCSC). Not AEC-Q100 qualified - this part targets industrial and telecom, not automotive. Halogen-free status not stated in available data.
