TPS65400_15 Datasheet, PDF (1/76 Pages) Texas Instruments – TPS65400 4.5- to 18-V Input Flexible Power Management Unit With PMBus/I2C Interface

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TPS65400
SLVSCQ9B – NOVEMBER 2014 – REVISED SEPTEMBER 2015
TPS65400 4.5- to 18-V Input Flexible Power Management Unit With PMBus/I²C Interface
1 Features
•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
• Pre-Bias Startup Algorithm Minimizes Voltage Dip
During Startup
• Internal Undervoltage Lockout (UVLO),
Overcurrent Protection (OCP), Overvoltage
Protection (OVP), and Overtemperature Protection
(OTP)
• AECQ-100 Grade 1 Option
• Thermally-Enhanced 7-mm × 7-mm 48-Pin, 0.5-
mm Pitch VQFN Package
• Pin Accessible Features:
– Adjustable VOUT With External Feedback
Resistors
– Sequencing Control Through Precision Enable
Pins for Each Switcher
– 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
• PMBus Runtime Control and Status
– Runtime Voltage Positioning Through
Adjustment of V_REF
– Enable and Disable of Each Switcher
– Fault and Status Monitoring
• User-Configurable PMBus / I²C Options, Saved in
EEPROM
– Power Supply Turn-On and Turn-Off
Sequencing
– Sequencing can be Based on Fixed Time
Delays or PGOOD Dependence
– Initial Voltage Positioning Through VREF
Configuration
– PWM Frequency Adjustment for Each Switcher
– Individual PWM Phase Alignment for Each
Switcher to Minimize Ripple and Capacitor
Size
– Adjustable Current Limit on Each Regulator
Enables Size and Cost Optimization of
Inductors
– Soft-Start Time
2 Applications
• Small Cellular Base Stations (BTS) (for Example:
Picocells and Microcells); Macro BTS (Using
Multiple PMUs)
• Power over Ethernet (PoE) Powered
Communications Infrastructure Equipment
• Automotive Infotainment and Telematics
• Powering DSP and MCUs
• Industrial and Factory Automation
• Systems Requiring Small Form Factor, High-
Efficiency, High-Ambient Operating Temperature,
and Flexible Power Management
3 Description
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.
Device Information⁽¹⁾
PART NUMBER
PACKAGE
BODY SIZE (NOM)
TPS65400
VQFN (48)
7.00 mm × 7.00 mm
(1) For all available packages, see the orderable addendum at
the end of the data sheet.
Simplified Schematic
Vin: 4.5 to 18 V
4A
2A
BUCK1 BUCK4
4A
BUCK2 BUCK3
2A
PMBus/I²C
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.