TPS53647_16 Datasheet, PDF (1/120 Pages) Texas Instruments – 4-Phase, D-CAP+, Step-Down, Buck Controller with NVM and PMBus Interface for ASIC Power and High-Current Point-of-Load

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TPS53647
SLUSC39A – JUNE 2015 – REVISED JULY 2016
TPS53647 4-Phase, D-CAP+, Step-Down, Buck Controller with NVM
and PMBus Interface for ASIC Power and High-Current Point-of-Load
1 Features
•1 8-bit Selectable BOOT Voltage via Pinstrap or
NVM: 0.5 V to 2.5 V (down to 5-mV Step)
• 1-, 2-, 3-, or 4- Phase Operation
• PMBus™ System Interface for Telemetry of
Voltage, Current, Power, Temperature, and Fault
Conditions
• 1.8-V and 3.3-V PMBus Bias Compatible
• Fault Reporting: Output Voltage, Output Current,
and Temperature
• Configurable with Non-Volatile Memory (NVM) or
Resistor Pinstrap
• 16 Levels of Programmable OCP with Pinstrap or
NVM
• Fast Transient with DCAP+™Control
• Optimized Efficiency at Light and Heavy Loads
• Support Pre-Bias Startup
• 8 Independent Levels of Overshoot Reduction
(OSR) and Undershoot Reduction (USR)
• Driverless Configuration for Efficient High-
Frequency Switching
• Fully Compatible with CSD95372BQ5MC
NexFET™ Power Stage
• Accurate, Adjustable Voltage Positioning
• 300-kHz to 1-MHz Frequency Selections with
Closed-loop Frequency Control
• Patented AutoBalance™ Phase Balancing
• Dynamic Phase Shedding with Programmable
Current Threshold
• Conversion Voltage Range: 4.5 V to 17 V
• Small, 6 mm × 6 mm, 40-Pin, QFN, PowerPAD™
Package
3 Description
The TPS53647 is a high-current, multi-phase, step-
down controller. The device offers built-in non volatile
memory (NVM) and PMBus interface. It is fully
compatible with the NexFET power stage
(CSD95372BQ5MC). The TPS53647 provides 8-bit
BOOT voltage selection covering output voltage from
0.5 V to 2.5 V, with steps as small as 5 mV, which is
ideal for high current application with accurate output
voltage setting. Advanced control features such as D-
CAP+ architecture with undershoot reduction (USR)
and overshoot reduction (OSR) provide fast transient
response, lowest output capacitance, and high
efficiency. The TPS53647 also provides novel phase
interleaving strategy and dynamic phase shedding for
efficiency improvement at light loads. In addition, the
TPS53647 supports the PMBus communication
interface with systems for telemetry of voltage,
current, power, temperature, and fault conditions.
Some of the configurations can be programmed by
pinstrap or PMBus and stored in non-volatile memory
to minimize the external component count.
The TPS53647 is offered in a space saving, thermally
enhanced 40-pin QFN package and is rated to
operate from –40°C to 125°C.
Device Information⁽¹⁾
PART NUMBER
PACKAGE
BODY SIZE (NOM)
TPS53647
QFN (40)
6.00 mm × 6.00 mm
(1) For all available packages, see the orderable addendum at
the end of the datasheet.
Simplified Schematic
TPS53647
PWM1
CSP1
Power
Stage
2 Applications
• Application-Specific Integrated Circuit (ASIC)
Power in Communications Equipment
• High Density Power Solutions
• Server Power
• Smart Power Systems
PMBus
PWM2
CSP2
PWM4
CSP4
Power
Stage
Power
Stage
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.