PI33/PI34/PI35xx Series
Cool-Power® ZVS Switching Regulators: Buck
48, 24 and 12V to PoL Buck Regulator Applications, Computing, Communications, Industrial,
Automotive Equipment. Constant current applications: LED Lighting and Battery Charging.
Description
Features & Benefits
PI33/PI34/PI35xx Cool-Power® ZVS Buck Regulators offer
board‑level designers maximum power density and flexibility for
high-efficiency 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).
• Wide Input Operating Ranges
Power delivery can be further increased by inter-leaving multiple
buck regulators using single wire current sharing. The ZVS
topology enables high-frequency operation maximizing efficiency
by minimizing the significant switching losses associated with
conventional hard switching buck regulators. The high switching
frequency of the Cool-Power ZVS Regulators reduces the size of
the external filtering components, improving power density while
enabling fast line and load dynamic response. These regulators
maintain high switching frequency all the way up to the rated input
voltage without sacrificing efficiency and, with its 20ns minimum
on-time, supports step down conversion for input voltages up
to 60V. The Cool-Power ZVS series offers buck regulators for
12VIN, 24VIN and 48VIN nominal systems. All devices within their
respective series share the same footprint.
■■12VIN nominal (8 to 18VIN)
■■24VIN nominal (8 to 36VIN)
■■48VIN nominal (30 to 60VIN)
■■–40°C to 125°C temperature operating range
• Simple to Use; Fast Development Time
■■Internal compensation - few external components
■■No additional design or additional settings required
• High Efficiency
■■>96% peak 48VIN to 12VOUT
■■>96% peak 24VIN to 12VOUT
■■>95% peak 12VIN to 5VOUT
■■Light load and full load high efficiency performance
• Flexible and Rich Feature Set
■■Paralleling and single wire current sharing
■■Frequency synchronization
■■User adjustable soft-start & tracking
■■PI33xx optional I2C™ telemetry & functionality
nn
VOUT margining
nn
Fault reporting
nn
Enable and SYNCI pin polarity
nn
Phase delay (for interleaving multiple regulators)
• High Density Packaging Platform
■■10 x 14 x 2.5mm SiP LGA
■■10.5 x 14.5 x 3.05mm BGA
■■10 x 10 x 2.5mm SiP LGA
■■10.5 x 10.5 x 3.05mm BGA
Example Power Chain
Total Area (With Required Components)
10mm
19mm
ZVS
Buck
BCM
ZVS Buck Regulator
Inductor
ZVS
Buck
VIN
CIN
PGND
ZVS Buck
PI33xx
VOUT
VS1
VOUT
COUT
REM
12V
48V
L1
VIN
SYNCI
SYNCO
EN
TRK
ADJ
EAO
SGND
380VDC
Cool-Power
®
Array of 2
14mm
5V
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 2.4
09/2018
PI34xx Efficiency (5VOUT)
Part Numbers
Options:
100
95
x = 0 (Standard)
x = 2 (I2C functionality & programmability)
Efficiency %
90
85
80
Part Number
75
Output Range
Rating
Set
Range
PI3420-00-LGIZ
1.0V
1.0 – 1.4V
15A
PI3421-00-LGIZ
1.8V
1.4 – 2.0V
15A
PI3422-00-LGIZ
2.5V
2.0 – 3.1V
15A
PI3423-00-LGIZ
3.3V
2.3 – 4.1V
15A
PI3424-00-LGIZ
5.0V
3.3 – 6.5V
15A
70
12V (8 – 18VIN)
65
60
55
50
0
1
3
2
4
5
6
7
9
8
10
12
11
13
14
15
Load Current (A)
8VIN
18VIN
12VIN
24V (8 – 36VIN) I2C ™ [b] Functionality
PI3311-x0-LGIZ
1.0V
1.0 – 1.4V
10A
PI3311-x1-LGIZ
1.0V
1.0 –1.4V
15A
PI3318-x0-LGIZ
1.8V
1.4 – 2.0V
10A
PI3318-x1-LGIZ
1.8V
1.4 – 2.0V
15A
PI3312-x0-LGIZ
2.5V
2.0 – 3.1V
10A
PI3312-x1-LGIZ
2.5V
2.0 – 3.1V
15A
85
PI3301-x0-LGIZ
3.3V
2.3 – 4.1V
10A
80
PI3301-x1-LGIZ
3.3V
2.3 – 4.1V
15A
PI3302-x0-LGIZ
5.0V
3.3 – 6.5V
10A
65
PI3302-00-BGIZ
5.0V
3.3 – 6.5V
10A
60
PI3302-03-LGIZ [a]
PI33xx Efficiency (12VOUT)
100
95
Efficiency
90
75
70
5V
3.3 – 6.5V
15A
PI3325-00-LGIZ
5.0V
4.0 – 6.5V
20A
PI3303-x0-LGIZ
12V
6.5 – 13.0V
8A
PI3305-x0-LGIZ
15V
10.0 – 16.0V
8A
3.3V
2.2 – 4.0V
22A
PI3525-00-LGIZ
5.0V
4.0 – 6.5V
20A
PI3526-00-LGIZ
12.0V
6.5 – 14V
18A
PI3542-00-LGIZ
2.5V
2.2 – 3.0V
10A
PI3542-00-BGIZ
2.5V
2.2 – 3.0V
10A
96
PI3543-00-LGIZ
3.3V
2.6 – 3.6V
10A
95
PI3543-00-BGIZ
3.3V
2.6 – 3.6V
10A
94
PI3545-00-LGIZ
5.0V
4.0 – 5.5V
10A
55
50
0
1
2
3
4
5
6
7
8
Load Curent (A)
VIN = 17.4V
VIN = 24V
VIN = 36V
48V (30 – 60VIN)
PI3523-00-LGIZ
PI35xx Efficiency (12VOUT)
48V (36 – 60VIN)
98
Efficiency (%)
97
93
92
91
90
89
PI3545-00-BGIZ
5.0V
4.0 – 5.5V
10A
PI3546-00-LGIZ
12.0V
6.5 – 14.0V
9A
PI3546-00-BGIZ
12.0V
6.5 – 14.0V
9A
[a]
1.8
3.6
5.4
7.2
9
10.8
12.6
14.4
16.2
18
Input operating range is limited to 11 – 36V
is a trademark of NXP Semiconductors
[b] I2C
Load Current (A)
VIN:
48V
30V
60V
vicorpower.com
Rev 2.4
09/2018
Mouser Electronics
Authorized Distributor
Click to View Pricing, Inventory, Delivery & Lifecycle Information:
Vicor:
PI3523-00-LGIZ PI3526-00-LGIZ PI3525-01-LGIZ
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