MAX20751 Multiphase Master Datasheet

MAX20751 Datasheet, PDF, Equivalent


Part Number

MAX20751

Description

Multiphase Master

Manufacture

Maxim Integrated

Total Page 30 Pages
Datasheet
Download MAX20751 Datasheet


MAX20751
MAX20751
EVALUATION KIT AVAILABLE
Multiphase Master with PMBus Interface
and Internal Buck Converter
General Description
The MAX20751 PMBus-compliant multiphase
master IC, with extensive status and parameter monitor-
ing, is capable of driving up to four smart-slave integrated
power devices.
Utilizing Maxim’s smart-slave ICs, the device
provides a high-density and flexible solution that can be
tailored to a range of power loads used in commu-
nication equipment. Proprietary-coupled inductors,
recommended to reduce the effective inductor value with-
out excessive ripple current, results in improved transient
response and reduction in the number of output capaci-
tors required.
The device incorporates current reporting, tempera-
ture monitoring, fault detection, and PMBus support.
Overcurrent and overtemperature faults are detected
by the individual smart slaves and faults communicated
through the master IC. The highest junction temperature
is reported, both before and after smart-slave regulation.
The device features an integrated switching regulator
that can optionally be used to supply the VDD rail for the
master controller and smart-slave devices to reduce the
power-rail requirements and simplify the regulator design.
Applications
● Communication, Networking, Servers, and Storage
Equipment
• ASICs
• Microprocessor Chipsets
• Memory VDDQ
• Other High-Current Digital ICs
Ordering Information appears at end of data sheet.
PMBus is a trademark of SMIF, Inc.
Benefits and Features
● Increased Power Density with Fewer External
Components Needed
• Scalable, Multiphase Solution
• Compatibility with Coupled Inductors Enables Fast
Transient Response and Reduced COUT
• Integrated Internal Switching Regulator to Power
Smart Slaves
● Optimized Component Performance and Efficiency
with Reduced Design-In Time
• PMBus-Compliant Interface for Telemetry and
Power Management
• Field-Programmable Memory to Allow Storage of
Desired Configuration Parameters
• Fault Logging
● Comprehensive System and IC Self-Protection
Features Promote Increased Power-Supply Reliability
• Overcurrent and Overtemperature
• Boost Voltage UVLO
• VX Short to Ground or VDDH Detection
• Phase-Current Steering for Thermal Balancing
● 36-Pin (6mm x 6mm) QFN Package
PWM1
Smart
ISENSE1 Slave
Power
Management
COntroller
PMBus
PWM2
Smart
ISENSE2 Slave
TS_FAULTB
MAX20751
PWM3
Smart
ISENSE3 Slave
PWM4
Smart
ISENSE4 Slave
SENSE_N
SENSE_P
Figure 1. Basic Application Circuit
VOUT
19-7080; Rev 2; 3/15

MAX20751
MAX20751
Multiphase Master with PMBus Interface
and Internal Buck Converter
Absolute Maximum Ratings
VDD33 Supply Voltage...............................................-0.3V to +4V
VIN_UV, VR_ON and PWRGD Pins.........................-0.3V to +4V
VDD Supply Voltage ...............................................-0.3V to +2.5V
PVX to PGND...........................................-0.6V to VDD33 + 0.6V
PMBus Pins (PMD, PMC, ALERTB).........................-0.3V to +6V
SENSE_N......................................................-0.3V to VDD +0.3V
SENSE_P.................................................................-0.3V to +4V
R_REF, MRAMP, R_SELx, PWMx, TS_FAULTB, ISENSEx,
A1_OUT, A2_x, A2B_OUT, A3_x................ -0.3 to VDD + 0.3V
Junction Temperature (TJ)................. ...............................+150°C
Storage Temperature Range..............................-65°C to +150°C
Peak Reflow Temperature................................................+260°C
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these
or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect
device reliability.
Operating Ratings
VDD33 Supply Voltage......................................+2.97V to +3.63V
VDD Supply Voltage.........................................+1.71V to +1.98V
VIN_UV, VR_ON and PWRGD.............................-0.1V to +3.6V
PMBus Pins (PMD, PMC, ALERTB).....................-0.1V to +5.5V
SENSE_N..............................................................-0.1V to +0.2V
SENSE_P..............................................................-0.1V to +2.5V
Junction Temperature Range (TJ).......................-40°C to +125°C
Package Thermal Characteristics
TQFN
Junction-to-Case Thermal Resistance (θJC)...............1.7°C/W
This product is completely Halogen-free and Pb-free, employing SnAgCu solder balls. The product is RoHS compliant with an -e1 termina-
tion finish and is compatible with both SnPb and Pb-free soldering operations. The product is MSL classified at peak reflow temperatures
that meet JEDEC JSTD-020.
Electrical Characteristics
(VDD = 1.71V to 1.98V, VDD33 = 3.3V ±10%, TJ = +25°C, unless otherwise noted.)
PARAMETER
SYMBOL
SUPPLY VOLTAGES AND CURRENTS
Supply Voltage Range
Supply Current
3.3V Supply Voltage Range
VDD
IDD
VDD33
3.3V Supply Current
IDD33
CONDITIONS
If external VDD supply is used
PWM not switching (Note 2)
No load, internal integrated
switcher disabled, PMBus idle
(Note 2)
VDD UVLO (UNDERVOLTAGE LOCKOUT)
Supply Voltage Undervoltage-
Lockout Rising Threshold
VDD_UVLO_RIS
(Note 2)
Supply Voltage Undervoltage-
Lockout Falling Threshold
VDD_UVLO_FAL (Note 2)
VDD33 UVLO
3.3V Supply Voltage Undervoltage-
Lockout Rising Threshold
VDD33_UV_RIS (Note 2)
3.3V Supply Voltage Undervoltage-
Lockout Falling Threshold
VDD33_UV_FAL (Note 2)
MIN TYP MAX UNITS
1.71
14
2.97
1.86
17
3.30
24
1.98
20
3.63
130
V
mA
V
µA
1.58
1.62
1.60
1.66
V
V
2.80
2.90
2.85
2.95
V
V
www.maximintegrated.com
Maxim Integrated 2


Features MAX20751 EVALUATION KIT AVAILABLE Multi phase Master with PMBus Interface and I nternal Buck Converter General Descrip tion The MAX20751 PMBus™-compliant mu ltiphase master IC, with extensive stat us and parameter monitoring, is capable of driving up to four smart-slave inte grated power devices. Utilizing Maxim s smart-slave ICs, the device provides a high-density and flexible solution t hat can be tailored to a range of power loads used in communication equipment. Proprietary-coupled inductors, recomme nded to reduce the effective inductor v alue without excessive ripple current, results in improved transient response and reduction in the number of output c apacitors required. The device incorpor ates current reporting, temperature mon itoring, fault detection, and PMBus sup port. Overcurrent and overtemperature f aults are detected by the individual sm art slaves and faults communicated thro ugh the master IC. The highest junction temperature is reported, both before and after smart-slave regulat.
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