Driverless Controller. TPS40425 Datasheet

TPS40425 Controller. Datasheet pdf. Equivalent

Part TPS40425
Description Synchronous Buck Driverless Controller
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TPS40425
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TPS40425
SLUSBO6C – JANUARY 2014 – REVISED OCTOBER 2018
TPS40425 Dual Output, 2-Phase, Stackable PMBus™ Synchronous Buck Driverless
Controller with Adaptive Voltage Scaling (AVS) Bus
1 Features
1 Non-Smart Power Mode in Factory Default
• Pin-for-Pin Equivalent to TPS40428 – Smart
Power Mode in Factory Default
• Single Supply Operation: 4.5 V to 20 V
• VOUT from 0.6 V
• Dual or Multi-Phase Synchronous Buck Controller
• Individual High-Speed AVS Interface
(0.5-V to 1.5-V Range)
• Fast Transient Response
• Stackable up to Four Phases
– 2-, 3-, or 4-Phase Interleaved Phase Shifts
– Accurate Current Sharing
• PMBus™ Interface Capability
– Margining Up or Down with 2-mV Step
– Programmable Fault Limit and Response
– ±0.8% VOUT
– Accuracy Current Monitoring
– ±4.5°C External Temperature Monitoring with
x3904
– Programmable UVLO ON/OFF Thresholds
– Programmable Soft-Start Time, Turn-On
Delay, and Turn-Off Delay
• On-Chip Non-Volatile Memory (NVM) to Store
Custom Configurations
• 0.6-V Reference Voltage with 0.5% Accuracy from
–40°C to 125°C
• Inductor DCR Current Sensing
• Programmable ƒSW from 200 kHz to 1.5 MHz
• Supports Pre-biased Output
• Differential Remote Sensing
• Synchronization to an Extermal Clock
• OC/OV/UV/OT Fault Protection
• 40-Pin, 6 mm × 6 mm, QFN Package
• Support for TI Power Stage
2 Applications
• Wireless Infrastructure
• Switcher/Router Networking/Server/Storage
3 Description
The TPS40425 is a PMBus, synchronous buck,
driverless controller. It operates in non-smart power
mode in factory default setting, and it can operate in
smart power mode after PMBus programming and
power reboot. It can be configured as dual-output or
2-phase. It is also stackable up to 4 phases to
support load current as high as 120 A. Interleaved
phase shift for 2-, 3-, or 4-phases reduce the input
and output ripples therefore reducing input and output
capacitance.
The wide input voltage range can support 5-V and
12-V intermediate supply buses. The 0.5% reference
voltage satisfies the need of precision voltage to the
modern ASICs.
Using the PMBus standard, the TPS40425 device
can program reference voltage, fault limit, UVLO
threshold, soft-start time and turn-on and turn-off
delay.
In addition, the device implements an accurate
measurement system to monitor the output voltages,
currents and temperatures for individual channels.
PART NUMBER
TPS40425
Device Information
PACKAGE
BODY SIZE (NOM)
VQFN (40)
6.00 mm × 6.00 mm
Figure 1. Simplified Application Diagram
(Dual Output)
VOUT1
GND
Power Stage
VIN
BOOT
GND
TPS40425
BP3 VDD
PWM
SW
PWM1
ISH1
CS1P
PWM2
ISH2
CS2P
CS1N
CS2N
{Remote SNS to VOUT1
DIFFO1
VSNS1
GSNS1
VSNS2
GSNS2
FB1
COMP1
PG1
CNTL1
SYNC
PHSET
FB2
COMP2
PG2
CNTL2
RT
Power Stage
GND
VIN
BOOT
PWM
SW
VOUT2
GND
{PMBus Interface
TSNS1
PMBDATA
TSNS2
PMBCLK
SMBALERT AGND
ADDR0 AVSDATA1
ADDR1 AVSCLK1
}Temperature Sense
}High-Speed AVSBUS
VIN
4.5 V to 17 V
GND
VOUT2
GND
1
An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,
intellectual property matters and other important disclaimers. PRODUCTION DATA.



TPS40425
TPS40425
SLUSBO6C – JANUARY 2014 – REVISED OCTOBER 2018
www.ti.com
Table of Contents
1 Features .................................................................. 1
2 Applications ........................................................... 1
3 Description ............................................................. 1
4 Revision History..................................................... 2
5 Pin Configuration and Functions ......................... 4
6 Specifications......................................................... 5
6.1 Absolute Maximum Ratings ...................................... 5
6.2 Handling Ratings....................................................... 6
6.3 Recommended Operating Conditions....................... 6
6.4 Thermal Information .................................................. 6
6.5 Electrical Characteristics........................................... 6
6.6 Typical Characteristics ............................................ 11
7 Detailed Description ............................................ 13
7.1 Overview ................................................................. 13
7.2 Functional Block Diagram ....................................... 14
7.3 Feature Description................................................. 15
7.4 Device Functional Modes........................................ 25
7.5 Programming........................................................... 25
7.6 Register Maps ......................................................... 30
7.7 Supported PMBus Commands ............................... 33
8 Applications and Implementation ...................... 72
8.1 Application Information............................................ 72
8.2 Typical Application .................................................. 72
9 Power Supply Recommendations...................... 81
10 Layout................................................................... 82
10.1 Layout Guidelines ................................................. 82
10.2 Layout Example .................................................... 83
11 Device and Documentation Support ................. 84
11.1 Device Support...................................................... 84
11.2 Trademarks ........................................................... 85
11.3 Electrostatic Discharge Caution ............................ 85
11.4 Glossary ................................................................ 85
12 Mechanical, Packaging, and Orderable
Information ........................................................... 86
4 Revision History
NOTE: Page numbers for previous revisions may differ from page numbers in the current version.
Changes from Revision B (December 2016) to Revision C
Page
• Added PWM Behavior During Soft-start Operation section.................................................................................................. 22
• Added information regarding TPS40425 and TPS28226 compatibility in PWM Signal section........................................... 22
Changes from Revision A (July 2014) to Revision B
Page
• Deleted reference to the TPS28226 device in Features section............................................................................................ 1
• Added note regarding TPS40425 and TPS28226 compatibility in PWM Signal section ..................................................... 22
Changes from Original (January 2014) to Revision A
Page
• Updated data sheet formatting to meet new standards ......................................................................................................... 1
• Updated Pin Functions table. ................................................................................................................................................ 4
• Rearranged Specifications section ......................................................................................................................................... 5
• Updated notes and conditions in Electrical Characteristics. No updates to specifications ................................................... 6
• Updated VOH and VOL parameters for PWM ........................................................................................................................... 7
• Updated IOC accuracy parameter for current limit .................................................................................................................. 8
• Updated Detailed Description section. ................................................................................................................................. 13
• Updated Figure 21................................................................................................................................................................ 26
• Added clarity to Table 4 ....................................................................................................................................................... 27
• Added clarity to Table 5 ....................................................................................................................................................... 28
• Added clarity to Table 6 ....................................................................................................................................................... 30
• Updated MFR_SPECIFIC_16 (COMM_EEPROM_SPARE) (E0h) ..................................................................................... 62
• Updated Applications and Implementation section............................................................................................................... 72
• Updated Figure 22................................................................................................................................................................ 73
• Changed 15 V to 14 V in Equation 11 and Equation 12 ..................................................................................................... 74
• Added Power Supply Recommendations section................................................................................................................. 81
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