ZVS Regulators: Buck-Boost　PI37xx Series

PI37xx Series ZVS Regulators: Buck-Boost High-Performance Buck-Boost Regulators For Communications and Industrial, 12, 24 and 48VIN Bus, 24VIN Line Stabilization and Automotive Accessories Description Features The PI37xx is a series of high-efficiency, wide-input-range • Over 98% efficiency at >800kHz FSW DC-DC ZVS Buck-Boost regulators integrating controller, power • Fast transient response switches and support components, all within a high-density System-in-Package (SiP). The integration of a high-performance • Parallel capable Zero-Voltage Switching (ZVS) topology, within the PI37xx • External frequency synchronization / interleaving increases point-of-load performance providing best-in-class power efficiency. The PI37xx requires only an external inductor and • High-Side current sense amplifier minimal capacitors to form a complete DC-DC switching mode buck-boost regulator. • General-purpose amplifier The ZVS architecture enables high-frequency operation while • Input over / undervoltage lockout (OVLO/UVLO) minimizing switching losses and maximizing efficiency. The high • Output overvoltage protection (OVP) switching frequency operation reduces the size of the external filtering components, improves power density and enables very fast • Overtemperature protection (OTP) dynamic response to line and load transients. The PI37xx regulator • Fast and slow current limits sustains high switching frequency up to the rated input voltage without sacrificing efficiency and supports large conversion ratios. • –40 to 115°C operating range (TJ), -xGIZ models • –55 to 115°C operating range (TJ), -BGMx models PI37xx Typical Application L1 V VININ VS1 VS2 VOUT VOUT CIN COUT PGND PGND ISP PI3749-00 ISN VDR IMON PGD VSN R1 EN VSP SYNCO VDIFF EAIN SYNCI EAO TRK COMP R2 SGND Part Numbering Part Number Input (V) Output (V) Power (W) Package Temperature High-Performance Buck-Boost PI3749-00-LGIZ 16 – 34 12 – 34 200 PI3741-00-LGIZ 21 – 60 21 – 36 140 LGA SIP: –40 to 115°C PI3741-01-LGIZ 21 – 60 36 – 54 150 10 x 14 x 2.5mm operating range (TJ) PI3740-00-LGIZ PI3740-00-BGIZ BGA SiP: 8 – 60 10 – 50 140 PI3740-00-BGMZ 10.5 x 14.5 x 3.05mm –55 to 115°C Lead-solder BGA SiP: PI3740-00-BGMP operating range (TJ) 10.5 x 14.5 x 3.05mm vicorpower.com Rev 1.4 02/2020

Example Powerchain ZVS Buck-Boost 48V 3A Single-Phase AC 85 – 264V AC 48VDC AIM PFM (2) ZVS ZVS Buck 5.5V 15A Efficiency PI3740, 12VOUT Efficiency PI3749, 24VOUT 100 100 95 90 95 85 90 80 85 75 70 80 0 1 2 3 4 5 6 7 8 0 1 2 3 4 5 6 7 Output Current (A) Output Current (A) 8VIN 12VIN 16VIN 18VIN 24VIN 16VIN 24VIN 34VIN 28VIN 36VIN 48VIN 60VIN Efficiency PI3741-00, 24VOUT Efficiency PI3741-01, 48VOUT 98 98 97 96 96 95 94 94 92 93 90 92 91 88 90 86 0 1 2 3 4 5 6 0 1 2 3 4 Output Current (A) Output Current (A) 21V 48V 60V 21VIN IN IN IN 48VIN 60VIN vicorpower.com Rev 1.4 02/2020 Efficiency (%) Efficiency (%) Efficiency (%) Efficiency (%)