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Picor |
PI33XX‐X0‐LGIZ
Cool‐Power®
8V to 36Vin Cool‐Power® ZVS Buck Regulator Family
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 point of 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.
Device
Output Voltage
Set Range
Iout Max
PI3311‐X0‐LGIZ 1.0V 1.00 to 1.4
10A
PI3312‐X0‐LGIZ 2.5V 2.0 to 3.1
10A
PI3301‐X0‐LGIZ 3.3V 2.3 to 4.1
10A
PI3302‐X0‐LGIZ 5.0V 3.3 to 6.5
10A
PI3303‐X0‐LGIZ 12V 6.5 to 13.0
8A
PI3305‐X0‐LGIZ 15V 10.0 to 16.0
8A
Table 1 ‐ PI33XX Portfolio. Additional versions available for
higher 18A current, output voltages (Vout) of 1.5 to 1.9V,
and Vout >15.
Features
High efficiency up to 98%
ZVS‐Buck Topology
Wide input voltage range of 8V to 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/Under Voltage Lockout (OVLO/UVLO)
Output Overvoltage Protection (OVP)
Over Temperature Protection (OTP)
Fast and slow current limits
‐40°C to 125°C operating range (TJ)
Optional I2C functionality & programmability:
Vout margining
Fault reporting
Enable and SYNCI pin polarity
Phase delay (for interleaving multiple
regulators)
Applications
High efficiency systems
Computing, Communications, Industrial,
Automotive Equipment
High voltage battery operation
The Zero Voltage Switching (ZVS) architecture also
enables high frequency operation while minimizing
Package Information
10mm x 14mm x 2.6mm LGA SiP
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.
Picor Corporation • picorpower.com PI33XX‐X0‐LGIZ Family Datasheet Rev 1.2 August 24, 2012
I2C is a trademark of NXP Semiconductors
Page 1 of 39
Contents
Order Information ............................................... 3
PI33XX Efficiency ................................................. 3
Pin Description .................................................... 4
Package Pin‐Out .................................................. 4
Absolute Maximum Ratings at 25°C ................... 5
PI3311‐X0 (1.0 VOUT) Electrical Characteristics . 6
Electrical Specifications ................................... 6
PI3311‐X0 Typical Characteristics ................... 8
PI3312‐X0 (2.5 Vout) Electrical Characteristics . 10
Electrical Specifications ................................. 10
PI3312‐X0 Typical Characteristics ................. 12
PI3301‐X0 (3.3 Vout) Electrical Characteristics . 14
Electrical Specifications ................................. 14
PI3301‐X0 Typical Characteristic ................... 16
PI3302‐X0 (5.0Vout) Electrical Characteristics .. 18
Electrical Specifications ................................. 18
PI3302‐X0 Typical Characteristics ................. 20
PI3303‐X0 (12Vout) Electrical Characteristics ... 22
Electrical Specifications ................................. 22
PI3303‐X0 Typical Characteristics ................. 24
PI3305‐X0 (15 Vout) Electrical Characteristics .. 26
Electrical Specifications ................................. 26
PI3305‐X0 Typical Characteristics ................. 28
Functional Description ...................................... 30
ENABLE (EN) .................................................. 30
Switching Frequency Synchronization .......... 30
Output Voltage Trimming ............................. 30
Soft‐Start ....................................................... 30
Remote Sensing ............................................ 31
Output Current Limit Protection ................... 31
Input Under‐Voltage Lockout ....................... 31
Input Over Voltage Lockout .......................... 31
Output Over Voltage Protection ................... 31
Over Temperature Protection ....................... 31
Pulse Skip Mode (PSM) ................................. 31
Variable Frequency Operation ...................... 32
Parallel Operation ......................................... 32
I2C Bus (PI33XX‐20 and PI33XX‐21 only) ....... 32
Application Description ..................................... 33
Output Voltage Programming ....................... 33
Soft‐Start Adjust and Tracking ...................... 34
Inductor Pairing ............................................. 34
Input and Output Filter Considerations ........ 35
Layout Guidelines .............................................. 36
Recommended PCB Footprint and Stencil ........ 37
Package Drawings ............................................. 38
Warranty ........................................................... 39
Picor Corporation • picorpower.com PI33XX‐X0‐LGIZ Family Datasheet Rev 1.2 August 24, 2012
Page 2 of 39
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