® PI33/PI34/PI35xx Series ZVS Buck Regulators HV to PoL Buck Regulator Applications, Computing, Communications, Industrial, Automotive Equipment. Constant current applications: LED Lighting and Battery Charging Features and Benefits Wide Input Operating Ranges Description n12 VIN nominal (8 to 18 VIN ) n24 VIN nominal (8 to 36 VIN ) n48 VIN nominal (34 to 60 VIN ) n-40°C to 125°C temperature operating range PI33/PI34/PI35xx Cool-Power® ZVS Buck Regulators offer boardlevel designers maximum power density and flexibility for highefficiency point-of-load DC-DC regulation. The integration of a high performance Zero-Voltage Switching (ZVS) topology increases point-of-load performance, providing best-in-class power efficiency up to 98%. Cool-Power ZVS Regulators are highly integrated with control circuitry, power semiconductors and support components in a high density LGA System in Package (SiP). Simple to Use; Fast Development Time nInternal compensation - few external components nNo additional design or additional settings required High Efficiency n>96% peak 48 VIN to 12 VOUT n>96% peak 24 VIN to 12 VOUT n>95% peak 12 VIN to 5 VOUT nLight load and full load high efficiency performance Power delivery can be further increased by inter-leaving multiple buck regulators using single wire current sharing. Use of a ZVS topology enables high-frequency operation that maximizes efficiency by minimizing the significant switching losses associated with conventional buck regulators using hard-switching topologies. The high switching frequency of the Cool-Power ZVS Regulators also reduces the size of the external filtering components, improving power density while enabling fast dynamic response to line and load transients. These regulators sustain high switching frequency all the way up to the rated input voltage without sacrificing efficiency and, with its 20 ns minimum on-time, supports step down conversion for input voltages up to 60V. The Cool-Power ZVS series offers buck regulators for 12 VIN, 24 VIN, and 48 VIN nominal systems. Packaging of the bucks is either in a 10 x 10 x 2.5 mm or 10 x 14 x 2.5 mm LGA package. All devices within their respective series share the same footprint. Flexible and Rich Feature Set nParalleling and single wire current sharing nFrequency synchronization nUser adjustable soft-start & tracking nPI33xx optional I2C telemetry & functionality – Vout margining – Fault reporting – Enable and SYNCI pin polarity – Phase delay (for interleaving multiple regulators) High Density Packaging Platform n10 x 14 x 2.5 mm SiP LGA n10 x 10 x 2.5 mm SiP LGA PI33xx/PI34xx Basic Application Picor Cool-Power® 10mm PI354x Block Diagram L1 Vin Vin ZVS Buck Regulator Cin 19mm PGND ZVS Buck PI33XX VS1 Vout Vout Cout REM SYNCI SYNCO EN SGND Inductor TRK ADJ EAO 14mm Cool-PowerCool-Power Required Components and GeneralCool-Power Dimensions ZVS Buck Regulator schematic with minimum with required components and required external components general dimensions vicorpower.com Rev 1.8 5/2015 PI34xx Efficiency Part Numbering PI34xx 12Vin 100 Cool-Power 95 8 – 18 VIN 85 80 % Efficiency Iout Max 12 V Nominal Versions 90 75 PI3420-00-LGIZ 1.0 V 1.0 – 1.4 V 15 A PI3421-00-LGIZ 1.8 V 1.4 – 2.0 V 15 A PI3422-00-LGIZ 2.5 V 2.0 – 3.1 V 15 A PI3423-00-LGIZ 3.3 V 2.3 – 4.1 V 15 A PI3424-00-LGIZ 5.0 V 3.3 – 6.5 V 15 A 24 V Nominal Versions 70 65 60 5 VOUT 3.3 VOUT 2.5 VOUT PI3311-00-LGIZ 1.0 V 1.0 – 1.4 V 10 A PI3318-00-LGIZ 1.8 V 1.4 – 2.0 V 10 A PI3312-00-LGIZ 2.5 V 2.0 – 3.1 V 10 A 1.8 VOUT PI3301-00-LGIZ 3.3 V 2.3 – 4.1 V 10 A 1.0 VOUT PI3302-00-LGIZ 5.0 V 3.3 – 6.5 V 10 A PI3303-00-LGIZ 12 V 6.5 – 13.0 V 8A PI3305-00-LGIZ 15 V 10.0 – 16.0 V 8A 55 50 1 2 3 4 5 6 7 8 9 24Vin Iout (A) 24 V Nominal (High Current) Versions 10 11 12 13 14 15 8 – 36 VIN 0 PI33xx Efficiency 100 PI3311-01-LGIZ 1.0 V 1.0 –1.4 V 15 A PI3318-01-LGIZ 1.8 V 1.4 – 2.0 V 15 A PI3312-01-LGIZ 2.5 V 2.0 – 3.1 V 15 A PI3301-01-LGIZ 3.3 V 2.3 – 4.1 V 15 A 5V 3.3 – 6.5 V 15 A PI3302-03-LGIZ** 24 V Nominal I2C* Functionality 95 PI3311-20-LGIZ 1.0 V 1.0 – 1.4 V 10 A PI3318-20-LGIZ 1.8 V 1.4 – 2.0 V 10 A PI3312-20-LGIZ 2.5 V 2.0 – 3.1 V 10 A PI3301-20-LGIZ 3.3 V 2.3 – 4.1 V 10 A PI3302-20-LGIZ 5.0 V 3.3 – 6.5 V 10 A 75 PI3303-20-LGIZ 12 V 6.5 – 13.0 V 8A PI3305-20-LGIZ 15 V 10.0 – 16.0 V 8A 70 PI3311-21-LGIZ 1.0 V 1.0 – 1.4 V 15 A 90 85 80 15 VOUT 12 VOUT 65 60 55 50 0 1 2 3 4 5 6 PI3318-21-LGIZ 1.8 V 1.4 – 2.0 V 15 A 5 VOUT PI3312-21-LGIZ 2.5 V 2.0 – 3.1 V 15 A 3.3 VOUT PI3301-21-LGIZ 3.3 V 2.3 – 4.1 V 15 A 2.5 VOUT 48 V Nominal Versions 1.0 VOUT PI3542-00-LGIZ 2.5 V 2.2 – 3.0 V 10 A PI3543-00-LGIZ 3.3 V 2.6 – 3.6 V 10 A PI3545-00-LGIZ 5.0 V 4.0 – 5.5 V 10 A PI3546-00-LGIZ 12.0 V 6.5 – 14.0 V 9A 7 8 9 10 Iout [A] PI35xx Efficiency 48 Vin 36 – 60 VIN % Efficiency Output Range Set Range * I2C is a trademark of NXP Semiconductors **Input operating range is limited to 11 V to 36 V 100 PI354x Basic Application 95 % Efficiency 90 85 12 VOUT 80 5 VOUT 3.3 VOUT 75 2.5 VOUT 70 65 0 1 2 3 4 5 Iout [A] 6 7 8 9 10 vicorpower.com Rev 1.8 5/2015