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TPS40425

更新时间： 2024-11-06 01:07:39
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德州仪器 - TI /
页数 文件大小 规格书
95页 2147K
描述
TPS40425 Dual Output, 2-Phase, Stackable PMBus™ Synchronous Buck Driverless Controller with Adaptive Voltage Scaling (AVS) Bus

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TPS40425 数据手册

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TPS40425  
SLUSBO6A –JANUARY 2014–REVISED JULY 2014  
TPS40425 Dual Output, 2-Phase, Stackable PMBus™ Synchronous Buck Driverless  
Controller with Adaptive Voltage Scaling (AVS) Bus  
1 Features  
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.  
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  
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.  
Stackable up to Four Phases  
–
–
2-, 3-, or 4-Phase Interleaved Phase Shifts  
Accurate Current Sharing  
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.  
•
PMBus Capability  
–
–
–
–
–
Margining Up or Down with 2-mV Step  
Programmable Fault Limit and Response  
±0.8% VOUT  
In addition, the device implements an accurate  
measurement system to monitor the output voltages,  
currents and temperatures for individual channels.  
Accuracy Current Monitoring  
±4.5°C External Temperature Monitoring with  
x3904  
Device Information  
–
–
Programmable UVLO ON/OFF Thresholds  
PART NUMBER  
PACKAGE  
BODY SIZE (NOM)  
Programmable Soft-Start Time, Turn-On  
Delay, and Turn-Off Delay  
TPS40425  
VQFN (40)  
6.00 mm × 6.00 mm  
•
•
On-Chip Non-Volatile Memory (NVM) to Store  
Custom Configurations  
Simplified Application Diagram  
(Dual Output)  
0.6-V Reference Voltage with 0.5% Accuracy from  
–40°C to 125°C  
VIN  
4.5 V to 17 V  
Power Stage  
VIN  
Power Stage  
VIN  
TPS40425  
GND  
PWM  
GND  
PWM  
BOOT  
BOOT  
•
•
•
•
•
•
•
•
•
Inductor DCR Current Sensing  
Programmable ƒSW from 200 kHz to 1.5 MHz  
Supports Pre-biased Output  
BP3  
VDD  
GND  
PWM1  
ISH1  
PWM2  
SW  
SW  
ISH2  
CS2P  
CS1P  
CS1N  
VOUT2  
VOUT1  
Differential Remote Sensing  
CS2N  
Synchronization to an Extermal Clock  
OC/OV/UV/OT Fault Protection  
40-Pin, 6 mm × 6 mm, QFN Package  
Support for TI Power Stage  
DIFFO1  
VSNS1  
GSNS1  
VSNS2  
GSNS2  
VOUT2  
GND  
Remote SNS to VOUT1  
{
FB1  
FB2  
COMP2  
PG2  
COMP1  
PG1  
Compatible with High-Frequency, Synchronous  
MOSFET Driver TPS28226  
CNTL2  
RT  
CNTL1  
SYNC  
PHSET  
GND  
GND  
2 Applications  
TSNS1  
TSNS2  
PMBDATA  
PMBCLK  
Temperature Sense  
•
•
Wireless Infrastructure  
}
PMBus Interface  
{
AGND  
SMBALERT  
Switcher/Router Networking/Server/Storage  
ADDR0 AVSDATA1  
ADDR1 AVSCLK1  
High-Speed AVSBUS  
}
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.  
 
 
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