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TPS65400_15

更新时间： 2024-02-28 21:54:33
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TPS65400 4.5- to 18-V Input Flexible Power Management Unit With PMBus/I2C Interface

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Sample &  
Buy  
Support &  
Community  
Product  
Folder  
Tools &  
Software  
Technical  
Documents  
TPS65400  
SLVSCQ9B –NOVEMBER 2014–REVISED SEPTEMBER 2015  
TPS65400 4.5- to 18-V Input Flexible Power Management Unit With PMBus/I2C Interface  
1 Features  
Size  
–
Adjustable Current Limit on Each Regulator  
Enables Size and Cost Optimization of  
Inductors  
1
•
•
Efficiency up to 95% for Each Switching Regulator  
Switching Regulator Specifications:  
–
–
–
–
Input Voltage Range: 4.5 to 18 V  
Vout Range: 0.6 V-90%Vin  
SW1, SW2 Iout: 4-A Max  
SW3, SW4 Iout: 2-A Max  
–
Soft-Start Time  
2 Applications  
•
Small Cellular Base Stations (BTS) (for Example:  
Picocells and Microcells); Macro BTS (Using  
Multiple PMUs)  
•
•
Pre-Bias Startup Algorithm Minimizes Voltage Dip  
During Startup  
Internal Undervoltage Lockout (UVLO),  
Overcurrent Protection (OCP), Overvoltage  
Protection (OVP), and Overtemperature Protection  
(OTP)  
•
Power over Ethernet (PoE) Powered  
Communications Infrastructure Equipment  
•
•
•
•
Automotive Infotainment and Telematics  
Powering DSP and MCUs  
•
•
AECQ-100 Grade 1 Option  
Industrial and Factory Automation  
Thermally-Enhanced 7-mm × 7-mm 48-Pin, 0.5-  
mm Pitch VQFN Package  
Systems Requiring Small Form Factor, High-  
Efficiency, High-Ambient Operating Temperature,  
and Flexible Power Management  
•
Pin Accessible Features:  
–
–
–
Adjustable VOUT With External Feedback  
Resistors  
3 Description  
Sequencing Control Through Precision Enable  
Pins for Each Switcher  
The TPS65400 is an integrated PMU optimized for  
applications requiring small form factor and high  
power conversion efficiency, enabling small space-  
constrained equipment with high ambient operating  
temperature without cooling. It provides high-power  
efficiency at a system level by enabling a single stage  
conversion from an intermediate distribution bus with  
an optimized combination of regulators.  
Resistor Adjustable PWM Switching Frequency  
from 275 kHz to 2.2 MHz  
–
–
–
Clock Sync Input and Clock Output  
Soft-Start Delay Through External Capacitor  
Current Sharing Between SW1 and SW2 and  
Between SW3 and SW4 Allows Support of  
Higher Current Needs if Required  
Device Information(1)  
PART NUMBER  
PACKAGE  
BODY SIZE (NOM)  
•
•
PMBus Runtime Control and Status  
TPS65400  
VQFN (48)  
7.00 mm × 7.00 mm  
–
Runtime Voltage Positioning Through  
Adjustment of VREF  
(1) For all available packages, see the orderable addendum at  
the end of the data sheet.  
–
–
Enable and Disable of Each Switcher  
Simplified Schematic  
Fault and Status Monitoring  
User-Configurable PMBus / I2C Options, Saved in  
EEPROM  
Vin: 4.5 to 18 V  
4 A  
4 A  
2 A  
2 A  
–
–
–
Power Supply Turn-On and Turn-Off  
Sequencing  
BUCK1  
BUCK2  
BUCK4  
BUCK3  
Sequencing can be Based on Fixed Time  
Delays or PGOOD Dependence  
Initial Voltage Positioning Through VREF  
Configuration  
PMBus/I2C  
–
–
PWM Frequency Adjustment for Each Switcher  
Individual PWM Phase Alignment for Each  
Switcher to Minimize Ripple and Capacitor  
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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