Cool-Power®
ZVS Switching Regulators
PI3749-x0
16V to 34VIN, 12V to 28VOUT, 240W Cool-Power ZVS Buck-Boost
Product Description
Features & Benefits
• Up to 98.5% efficiency at 800kHz FSW
The PI3749-x0 is high efficiency, wide range DC-DC ZVS
Buck-Boost regulator. This high density System-in-Package (SiP)
integrates controller, power switches, and support components.
The integration of a high performance Zero-Voltage Switching
(ZVS) topology, within the PI3749-x0, increases point of load
performance providing best in class power efficiency. The
PI3749-x0 requires an external inductor, resistive feedback divider
and minimal capacitors to form a complete DC-DC switching
mode buck-boost regulator.
• Up to 240W of continuous output power
(for specific conditions)
• Fast transient response
• Parallel capable with single wire current sharing
• External frequency synchronization / interleaving
• High Side Current Sense Amplifier
• General Purpose Amplifier
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.
• Input Over/Undervoltage Lockout (OVLO/UVLO)
• Output Overvoltage Protection (OVP)
• Overtemperature Protection (OTP)
• Fast and slow current limits
• -40°C to 115°C operating range (TJ)
• Excellent light load efficiency
• Optional I2C™ * functionality & programmability:
■■VOUT margining
■■Fault reporting
■■Enable and SYNCI pin polarity
Applications
• Computing, Communications, Industrial
• Variable output step up/down voltage regulation
Package Information
• 10mm x 14mm x 2.56mm LGA SiP
Typical Application
L1
99
98
97
96
95
94
93
92
91
5
VIN
VIN
VS1
VS2
VOUT
VOUT
4.5
4
CIN
COUT
PGND
ISP
PGND
3.5
3
ISN
PI3749-00
VDR
IMON
VSN
2.5
2
PGD
EN
R1
R2
VSP
SYNCO
VDIFF
EAIN
EAO
1.5
1
SYNCI
TRK
15
20
25
30
35
COMP
SGND
VIN (V)
Efficiency
Power Dissipation
* I2C™ is a trademark of NXP semiconductor
Cool-Power® ZVS Switching Regulators
Page 1 of 27
Rev 2.1
09/2017