1 Features
• Input Voltage Range: 4.5 V to 17 V
• Output Voltage Range: 0.25 V to 5.5 V
• Intel® VR13.HC SVID Compliant
• Dual Output Supporting N+M Phase
Configurations (N+M ≤ 8, M ≤ 4)
• Enhanced D-CAP+™ Control to Provide Super
Transient Performance with Excellent Dynamic
Current Sharing
• Programmable Loop Compensation
• Programmable Phase-Firing Order
• Individual Phase Current Calibrations and
Reporting
• Dynamic Phase Shedding with Programmable
Thresholds for Optimizing Efficiency at Light and
Heavy Loads
• Fast Phase-Adding for Undershoot Reduction
(USR)
• Driverless PWM Architecture for Efficient High-
Frequency Switching
• Fully Compatible with TI NextFET™ Power Stage
for High-Density Solutions
• Accurate, Adjustable, Adaptive Voltage Positioning
(AVP)
• Patented AutoBalance™ Phase Current Balancing
• Cycle-by-cycle Per-Phase Current Limit
• PMBus™ v1.3.1 System Interface for Telemetry of
Voltage, Current, Power, Temperature, and Fault
Conditions
• 5 mm × 5 mm, 40-Pin, QFN Package

2 Applications
• Data center & enterprise computing rack server
• Hardware accelerator
• Network interface card (NIC)
• ASIC and high-performance client

3 Description
The TPS53688 is a fully VR13.HC SVID compliant
step-down controller with two channels, built-in nonvolatile
memory (NVM), and PMBus™ interface, and is
fully compatible with TI NexFET™ smart power
stages. Advanced control features such as the D-CAP
+™ architecture with undershoot reduction (USR)
provide fast transient response, low output
capacitance, and good dynamic current sharing. The
device also provides a novel phase interleaving
strategy and dynamic phase shedding, for efficiency
improvement across loading conditions. Adjustable
control of output voltage slew rate and adaptive
voltage positioning are natively supported. In addition,
the device supports the PMBus communication
interface, for reporting the telemetry of voltage,
current, power, temperature, and fault conditions to
the host system. All programmable parameters can be
configured through the PMBus interface and stored in
NVM as new default values, to minimize the external
component count.
The TPS53688 device is offered in a thermally
enhanced 40-pin QFN packaged and is rated to
operate from –40°C to 125°C.