ZVS Switching Regulators
PI33xx-x1
8V to 36V
IN
, 15A Cool-Power ZVS Buck Regulator
Product Description
The PI33xx-x1 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-x1 series
increases point of load performance providing best in class power
efficiency. The PI33xx-x1 requires only an external inductor and
minimal capacitors to form a complete DC-DC switching mode
Buck Regulator.
Device
Output Voltage
Set
Range
I
OUT
Max
Cool-Power
®
Features & Benefits
•
High Efficiency 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 / Undervoltage Lockout (OVLO/UVLO)
•
Output Overvoltage Protection (OVP)
•
Overtemperature Protection (OTP)
•
Fast and slow current limits
•
-40°C to 125°C operating range (T
J
)
•
Optional I
2
C* functionality & programmability:
nn
OUT
margining
V
nn
Fault reporting
nn
Enable and SYNCI pin polarity
nn
Phase delay (interleaving multiple regulators)
PI3311-x1-LGIZ
PI3318-x1-LGIZ
PI3312-x1-LGIZ
PI3301-x1-LGIZ
1.0V
1.8V
2.5V
3.3V
1.0 to 1.4V
1.4 to 2.0V
2.0 to 3.1V
2.3 to 4.1V
15A
15A
15A
15A
Table 1 –
PI33xx-x1 portfolio
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. The PI33xx-x1
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 36V
IN
.
Applications
•
High efficiency systems
•
Computing, Communications, Industrial,
Automotive Equipment
•
High voltage battery operation
Package Information
•
10mm x 14mm x 2.6mm LGA SiP
* I
2
C is a trademark of NXP Semiconductors
Cool-Power
®
ZVS Switching Regulators
Page 1 of 27
Rev 1.4
11/2016
PI33xx-x1
Contents
Order Information
Absolute Maximum Ratings
Functional Block Diagram
Pin Description
Package Pin-Out
PI3311-x1-LGIZ (1.0V
OUT
) Electrical Characteristics
PI3318-x1-LGIZ (1.8V
OUT
) Electrical Characteristics
PI3312-x1-LGIZ (2.5V
OUT
) Electrical Characteristics
PI3301-x1-LGIZ (3.3V
OUT
) Electrical Characteristics
Functional Description
ENABLE (EN)
Remote Sensing
Switching Frequency Synchronization
Soft-Start
Output Voltage Trim
Output Current Limit Protection
Input Undervoltage Lockout
Input Overvoltage Lockout
Output Overvoltage Protection
Overtemperature Protection
Pulse Skip Mode (PSM)
Variable Frequency Operation
Parallel Operation
I
2
C Interface Operation
3
4
4
5
5
6
9
12
15
18
18
18
18
18
18
19
19
19
19
19
19
19
20
20
Application Description
Output Voltage Trim
Soft-Start Adjust and Tracking
Inductor Pairing
Layout Guidelines
Recommended PCB Footprint and Stencil
LGIZ Package Drawing
Revision History
Product Warranty
21
21
22
22
23
24
25
26
27
Cool-Power
®
ZVS Switching Regulators
Page 2 of 27
Rev 1.4
11/2016
PI33xx-x1
Order Information
Cool-Power
Output Range
Set
Range
I
OUT
Max
Package
Transport
Media
PI3311-01-LGIZ
PI3318-01-LGIZ
PI3312-01-LGIZ
PI3301-01-LGIZ
1.0V
1.8V
2.5V
3.3V
1.0 to 1.4V
1.4 to 2.0V
2.0 to 3.1V
2.3 to 4.1V
15A
15A
15A
15A
10mm x 14mm 123-pin LGA
10mm x 14mm 123-pin LGA
10mm x 14mm 123-pin LGA
10mm x 14mm 123-pin LGA
TRAY
TRAY
TRAY
TRAY
I
2
C Functionality & Programmability
Cool-Power
Output Range
Set
Range
I
OUT
Max
Package
Transport
Media
PI3311-21-LGIZ
PI3318-21-LGIZ
PI3312-21-LGIZ
PI3301-21-LGIZ
1.0V
1.8V
2.5V
3.3V
1.0 to 1.4V
1.4 to 2.0V
2.0 to 3.1V
2.3 to 4.1V
15A
15A
15A
15A
10mm x 14mm 123-pin LGA
10mm x 14mm 123-pin LGA
10mm x 14mm 123-pin LGA
10mm x 14mm 123-pin LGA
TRAY
TRAY
TRAY
TRAY
Cool-Power
®
ZVS Switching Regulators
Page 3 of 27
Rev 1.4
11/2016
PI33xx-x1
Absolute Maximum Ratings
Name
Rating
V
IN
VS1
SGND
PGD, SYNCO, SYNCI, EN, EAO, ADJ, TRK, ADR1, ADR2, SCL, SDA
PI3311-x1-LGIZ
V
OUT
, REM
PI3318-x1-LGIZ
PI3312-x1-LGIZ
PI3301-x1-LGIZ
Storage Temperature
Operating Junction Temperature
Soldering Temperature for 20 seconds
ESD Rating
-0.7V to 36V
-0.7V to 36V
DC
100mA
-0.3V to 5.5V / 5mA
-0.3V to 5.5V
-0.5V to 9V
-0.8V to 13V
-1.0V to 18V
-65°C to 150°C
-40°C to 125°C
245°C
2kV HBM
Notes:
At 25°C ambient temperature. Stresses beyond these limits may cause permanent damage to the device. Operation at these conditions or condi-
tions beyond those listed in the Electrical Specifications table is not guaranteed. All voltage nodes are referenced to PGND unless otherwise noted.
Test conditions are per the specifications within the individual product electrical characteristics.
Functional Block Diagram
V
IN
V
IN
Q1
Q2
R4
VS1
V
OUT
V
OUT
REM
Power
Control
SYNCO
SYNCI
PGD
EN
R1
VCC
-
+
1V R2
EAO
ADJ
ZVS Control
Memory
Interface
TRK
PGND
0
SGND
ADR0
ADR1
SDA
Simplified Block Diagram (I
2
C pins SCL, SDA, ADR0, and ADR1 only active for PI33xx-21 device versions)
SCL
Cool-Power
®
ZVS Switching Regulators
Page 4 of 27
Rev 1.4
11/2016
PI33xx-x1
Pin Description
Pin Name
SGND
PGND
VIN
VOUT
VS1
PGD
EAO
EN
REM
ADJ
TRK
NC
VDR
SYNCO
SYNCI
SDA
SCL
ADR1
ADR0
Number
Description
Signal Ground:
Internal logic ground for EA, TRK, SYNCI, SYNCO, ADJ and I
2
C (options) communication
Block 1
Block 2
Block 3
Block 5
Block 4
A1
A2
A3
A5
B1
C1
A4
K3
K4
K5
D1
E1
H1
G1
returns. SGND and PGND are star connected within the regulator package.
Power Ground:
VIN and VOUT power returns.
Input Voltage:
and sense for UVLO, OVLO and feed forward ramp.
Output Voltage:
and sense for power switches and feed-forward ramp.
Switching Node
: and ZVS sense for power switches.
Parallel Good:
Used for parallel timing management intended for lead regulator.
Error Amp Output:
External connection for additional compensation and current sharing.
Enable Input:
Regulator enable control. Asserted high or left floating – regulator enabled;
Asserted low, regulator output disabled. Polarity is programmable via I
2
C interface.
Remote Sense:
High side connection. Connect to output regulation point.
Adjust Input:
An external resistor may be connected between ADJ pin and SGND or VOUT
to trim the output voltage up or down.
Soft-start and Track Input:
An external capacitor may be connected between TRK pin
and SGND to decrease the rate of rise during soft-start.
No Connect:
Leave pins floating.
VDR can only be used for ADR0 and ADR1 pull up reference voltage.
No other external loading is permitted.
Synchronization Output:
Outputs a low signal for ½ of the minimum period for
synchronization of other converters.
Synchronization Input:
Synchronize to the falling edge of external clock frequency.
SYNCI is a high impedance digital input node and should always be connected to SGND when not in use.
Data Line:
Connect to SGND for PI33xx-01 and PI33xx-11. For use with PI33xx-21 only.
Clock Line:
Connect to SGND for PI33xx-01. For use with PI33xx-21 only.
Tri-state Address:
No connect for PI33xx-01. For use with PI33xx-21 only.
Tri-state Address:
No connect for PI33xx-01. For use with PI33xx-21 only.
Package Pin-Out
SYNCO
SYNCI
PGND
Block 2
7
8
VDR
1
SGND
Block 1
K
J
2
3
4
5
6
9
10
11
12
13
14
Block 1:
B2-4, C2-4, D2-3, E2-3, F1-3, G2-3, H2-3, J1-3, K1-2
ADR1 H
ADR0 G
SGND F
SCL E
SDA D
TRK C
ADJ B
PGD A
VOUT
Block 5
EAO
EN
NC
REM
VIN
Block 3
Block 2:
A8-10, B8-10, C8-10, D8-10, E4-10,
F4-10, G4-10, H4-10, J4-10, K6-10
Block 3:
G12-14, H12-14, J12-14, K12-14
VS1
Block 4
Block 4:
A12-14, B12-14, C12-14, D12-14, E12-14
Block 5:
A6-7, B6-7, C6-7, D6-7
Cool-Power
®
ZVS Switching Regulators
Page 5 of 27
Rev 1.4
11/2016
