Datasheets pdb-3535, px3535 Datasheet

Primarion® PX3535
Digital Multiphase Controller

Product Brief

Applications

• Core power regulation for Intel® and AMD® µprocessors

• Intelligent point-of-load (POL) power regulation

Features

• Multiphase power conversion
– 1- to 6-phase operation

• 100 KHz to 2 MHz switching frequency

• Supports Intel

• Internal high precision voltage reference
– ± 10mV voltage setpoint accuracy

• Precision digital current sense calibration

• Precise digital current balancing with programmable offsets

for thermal balancing

• Digitally programmable loadline and loop compensation

• Differential voltage sense

• Digital temperature sensor compensation

• Active Transient Response (ATR) enables meeting transient

requirements with reduced output capacitance

2

• I

C-bus interface for monitoring, control and configuration

• Internal non-volatile memory (NVM) to store custom
configurations with four programmable Active Voltage
Positioning (AVP) system configurations

• Extensive fault detection capability with two user configurable
output fault pins

– Input Under-voltage
– Output Under-/Over-voltage
– High Side Short
– Per Phase and Total Output Current
– Multiple Internal and External Temperature Limits
– NVM Configuration
– Calibration Range and Time-Out

• Configurable latched fault or autonomous recovery shutdown

• Single +3.3V supply operation

• RoHS compliant 48-lead LQFP plastic package

®

VR 10.x, AMD®, and custom VID codes

Description

Processors that operate above a GHz require fast, intelligent
power systems. The Primarion® PX3535 Digital Multiphase

Controller provides high-bandwidth frequency response,
noise immunity, and active transient performance algorithms
that only digital architecture can provide.

The PX3535 provides core power for today’s high current
microprocessors by driving from one to six synchronous­rectified buck-converter channels in parallel. Interleaved
timing of the channels results in a higher ripple frequency,
reducing input and output ripple. With up to six phases,
each capable of up to 2 MHz operation, the PX3535 can b e
used to build DC-DC converters that provide up to 200A with
excellent efficiency, low ripple, and the lowest component
count.

The PX3535 utilizes digital technology to implement all
control functions, providing the ultimate in flexibility and

stability. The PX3535 incorporates an industry standard I
bus serial interface for control and monitoring. Through the

serial interface, the power supply designer can quickly
optimize designs and monitor system performance. The
interface allows the PX3535 to provide digitized information
for real time system monitoring and control.

Block Diagram

ADC

Window

Comparator

(OVP/UVP)

Voltage

ADC

Current
Balance

Channel Current

AVP

Ref

Digital Calibration Controller

PID/PWM

Controller

Fault Handler

VSENP

VSENN

RESET_N

ISEN1

ISEN2

ISEN3

ISEN4

ISEN5

ISEN6

TEMP_SEN

V12_SEN

SCL

SDA

SADDR

OUTEN

VID5

VID4

VID3

VID2

VID1

VID0

POR

Current

Sense

Current

Temp
Sense

I2C Internal Memory

Deglitch

LL1

LL0

Oscillator

State Machine

PWM

Driver

2

C-

OUT12

OUT11

OUT10

OUT9

OUT8

OUT7

OUT6

OUT5

OUT4

OUT3

OUT2

OUT1

FAULT2

FAULT1

CAL_CUR_EN

CAL_CUR_SEN

VCC_PWRGD

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PDB-3535-001C
27-Feb-06

®

f

Primarion

PX3535

Digital Multiphase Controller

4-Phase Reference Design

+12V

150kΩ

+5V

10kΩ

+3.3V

VDD

PRIMARION

VID4
VID3

From

µP

To µ P

System

Reset

Fault

Outputs

I2C I/F

Bus

VID2
VID1
VID0
VID5
LL0
LL1
OUTEN

VCC_PWRGD

RESET_N

FAULT1
FAULT2

SDA
SCL
SADDR

Physical Characteristics (48-pin LQFP)

PX3535

V12_SE N

GND
OUT1
OUT2
ISEN1
OUT3
OUT4
ISEN2
OUT5
OUT6
ISEN3
OUT7
OUT8
ISEN4
OUT9

OUT10

ISEN5

OUT11
OUT12

ISEN6

TEMP_SEN

CAL_CUR_EN

CAL_CUR_SEN

VSENP
VSENN

Product Brie

1µ F

1

UGATE

2

BOOT

3

PWM

4

GND

4.7µF

1

UGATE

2

BOOT

3

PWM

4

GND

4.7µF

1

UGATE

BOOT

2

3

PWM

4

GND

4.7µF

1

UGATE

2

BOOT

PWM

3

4

GND

4.7µF

8

PHASE

7

PVCC

6

VCC

5

LGATE

1µ F

8

PHASE

7

PVCC

6

VCC

5

LGATE

1µ F

8

PHASE

PVCC

7

6

VCC

5

LGATE

1µ F

8

PHASE

7

PVCC

VCC

6

5

LGATE

RSEN1

RSEN2

RSEN3

RSEN4

RTHERM

4.7nF

4.7nF

4.7nF

4.7nF

2.2Ω

2.2Ω

OSCON CERAMIC

2.2Ω

2.2Ω

0.015Ω

V

CC(core)

V

CC(rtn)

Notes:

1. All dimensions are in mm

Printed in the USA/1002/PDF/TK/PS
This document contains information about a new product during its early phase of development. The information contained in this document is based on design targets, simulation results, or early product test results. Characteristic data
and other specifications are subject to change without notice. Customers are advised to confirm information in this advanced product data sheet prior to using this information or placing an order. Primarion does not assume any liability
arising from the application or use of any product or circuit described herein, neither does it convey any license under its patents or any other rights. Primarion products are not designed, intended, or authorized, or warranted to be
suitable for use in life-support applications, devices or systems or other critical applications.
©2005, Primarion, Inc. Primarion is a registered trademark of Primarion, Inc. The Primarion logos are trademarks of Primarion, Inc. *Other names and brands are the property of their respective owners.
2780 Skypark Drive, Suite 100, Torrance, CA 90505 1-310-602-5500 Fax [phone] ● www.primarion.com

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PDB-3535-001C
27-Feb-06