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TPS65400QRGZRQ1

Automotive, 4.5 V to 18 V input, 4 A / 4 A / 2 A / 2 A synchronous quad converter with PMBus / I2C

Manufacturer:

Texas Instruments, Inc
Mfr.Part #:

TPS65400QRGZRQ1
Datasheet:

TPS65400QRGZRQ1 Datasheet (PDF)
Series:

Automotive, AEC-Q100
Function:

Step-Down
Output Configuration:

Positive
Topology:

Buck
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TPS65400QRGZRQ1 General Description

The TPS65400-Q1 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.

TPS65400-Q1 implements a PMBus-I²C-compatible digital interface. It helps Core Chip optimize system performance by runtime changing regulated voltage, power sequence, phase interleaving, operating frequency, read back operating status, and so forth.

The TPS65400-Q1 consists of four high-current buck switching regulators (SW1, SW2, SW3, and SW4) with integrated FETs. The switching power supplies are intended for powering high-current digital circuits such as the processor, FPGA, ASIC, memory, and digital I/Os. SW1 and SW2 support 4 A each, and SW3 and SW4 support 2 A each. Each regulator’s switching frequency is independently adjustable up to 2.2 MHz.

Current limit programmability on each switcher enables optimization of inductor ratings for a particular application configuration not requiring the maximum current capability.

The TPS65400-Q1 can be powered from a single-input voltage rail between 4.5 and 18 V, making it suitable for applications running off a 5- or 12-V intermediate power distribution bus.

Sequencing requirements can be met using the individual enable terminals or by programming the sequence through the I²C bus into the onboard EEPROM. Output voltages can be set through external resistor networks and VREF can be programmed from 0.6 to 1.87 V in 10-mV steps. All control and status info can be accessed through a PMBus-compatible I²C bus.

The TPS65400-Q1 provides a high level of flexibility for monitoring and control through the I²C bus while providing the option of programmability through the use of external components and voltage levels for systems not using I²C.

Key Features

Qualified for Automotive Applications
AEC-Q100 Qualified With the Following Results:
- Device Temperature Grade 1: -40°C to 125°C Ambient Operating Temperature Range
- Device HBM ESD Classification Level H2
- Device CDM ESD Classification Level C4B
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)
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

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Specifications

Category	Integrated Circuits (ICs)Power Management (PMIC)Voltage Regulators - DC DC Switching Regulators	Series	Automotive, AEC-Q100
Function	Step-Down	Output Configuration	Positive
Topology	Buck	Output Type	Adjustable
Number of Outputs	4	Voltage - Input (Min)	4.5V
Voltage - Input (Max)	18V	Voltage - Output (Min/Fixed)	0.6V
Voltage - Output (Max)	16.2V	Current - Output	4A, 2A
Frequency - Switching	275kHz ~ 2.2MHz	Synchronous Rectifier	Yes
Operating Temperature	-40°C ~ 125°C (TJ)	Mounting Type	Surface Mount
Base Product Number	TPS65400	Product Category	Switching Voltage Regulators
Output Voltage	600 mV to 16.2 V	Output Current	4 A
Input Voltage, Max	18 V	Mounting Style	SMD/SMT
Switching Frequency	275 kHz to 2.2 MHz	Quiescent Current	12 uA
Minimum Operating Temperature	- 40 C	Maximum Operating Temperature	+ 125 C
Qualification	AEC-Q100	Input Voltage, Min	4.5 V
Moisture Sensitive	Yes	Product Type	Switching Voltage Regulators
Factory Pack Quantity	2500	Subcategory	PMIC - Power Management ICs
Unit Weight	0.005803 oz