Product Description
The PI33xx is a family of high-efficiency, wide-input-range DC‑DC
ZVS Buck regulators integrating controller, power switches and
support components all within a high-density System‑in‑Package
(SiP). The integration of a high-performance Zero-Voltage
Switching (ZVS) topology, within the PI33xx series, increases pointof-
load performance providing best-in-class power efficiency. The
PI33xx requires only an external inductor and minimal capacitors to
form a complete DC-DC switching-mode Buck Regulator.
The ZVS architecture also enables high-frequency operation
while minimizing switching losses and maximizing efficiency. The
high‑switching-frequency operation reduces the size of the external
filtering components, improves power density, and enables very
fast dynamic response to line and load transients. The PI33xx series
sustains high switching frequency all the way up to the rated input
voltage without sacrificing efficiency and, with its 20ns minimum
on-time, supports large step‑down conversions up to 36VIN.

Features & Benefits
• High-efficiency ZVS Buck topology
• Wide input voltage range of 8 – 36V
• Very-fast transient response
• High-accuracy pre-trimmed output voltage
• User-adjustable soft start & tracking
• Power-up into pre-biased load (select versions)
• Parallel capable with single-wire current sharing
• Input Over/Undervoltage Lockout (OVLO/UVLO)
• Output Overvoltage Protection (OVP)
• Overtemperature Protection (OTP)
• Fast and slow current limits
• –40 to 125°C operating range (TJ)
Applications
• High-Efficiency Systems
• High-Voltage Battery Operation