Texas Instruments TPS56302PWP

Overview

TPS56302PWP from Texas Instruments is a dual-output synchronous-buck controller IC designed for powering DSP, FPGA, and microcontroller core and I/O rails. It integrates a hysteretic switching regulator (1.3 V–3.3 V output) and an LDO controller (1.3 V–2.5 V output), supports tri-level VID programming, delivers >90% efficiency, and features ±1.5% reference voltage tolerance.

For engineers reviewing the TPS56302PWP datasheet, TPS56302PWP pinout, TPS56302PWP application, or TPS56302PWP equivalent, this page provides verified technical context, validated pin functions, confirmed dual-rail sequencing behavior, real-world protection thresholds (OVP/UVP at 115%/75% VREF), and authoritative alternative part comparisons for DSP power supply design.

Technical Context

The TPS56302PWP implements a dual-path architecture: a hysteretic-controlled ripple regulator for high-efficiency I/O rail generation (1.3 V–3.3 V), and a low-dropout controller driving an external N-channel MOSFET for precise core voltage regulation (1.3 V–2.5 V). Both outputs share synchronized slow-start and are monitored by a single open-drain PWRGD signal.

It uses droop compensation via the DROOP pin to enable load-line regulation, lossless current sensing through HISENSE/LOSENSE pins, and adaptive deadtime control to prevent shoot-through. The device drives logic-level N-channel MOSFETs across its full 2.8 V–5.5 V input range with integrated 2-A peak gate drivers and internal charge pump (VDRV = 5 V).

Key Specifications

Pinout & Package

PWP PowerPAD™ package: 28-pin thermally enhanced TSSOP with exposed thermal pad (PwrPad) on underside for improved heat dissipation in high-power applications.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar dual-output controller applications.

Compared with TPS56302PWP, TPS56300PWP offers identical functionality with swapped output roles - suitable only when core voltage exceeds I/O voltage. TPS51100PWP simplifies single-rail designs but cannot replace the coordinated dual-output control, VID programming, or integrated power-good logic of the TPS56302PWP.

Availability

TPS56302PWP is available at Aetrix Electronics and suitable for DSP power management, FPGA dual-rail sequencing, and industrial embedded processor boards requiring stable component supply, long-term lifecycle support, and traceable sourcing.

Supply support for TPS56302PWP includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Texas Instruments is a global semiconductor leader specializing in analog, embedded processing, and power management solutions, with decades of expertise in DSP and high-performance power ICs.

The TPS56302PWP belongs to TI's DSP power controller product line, engineered specifically to meet stringent TI C5000/C6000 DSP power sequencing, VID compatibility, and thermal reliability requirements in industrial and telecom applications.

FAQ

What is the primary function of the TPS56302PWP in a DSP power system?

The TPS56302PWP serves as a dual-output power controller that independently regulates and sequences the core and I/O supply voltages for digital signal processors. It integrates a hysteretic switching regulator for the I/O rail (1.3 V–3.3 V) and an LDO controller for the core rail (1.3 V–2.5 V), ensuring synchronized startup, precise voltage accuracy (±1.5% reference), and coordinated power-good signaling - all critical for reliable DSP operation. The TPS56302PWP eliminates the need for separate controllers or external sequencing logic.

How does the TPS56302PWP implement voltage sequencing between core and I/O rails?

The TPS56302PWP achieves exact voltage sequencing through its shared SLOWST pin: a single external capacitor sets the ramp rate for both the ripple regulator (I/O) and LDO controller (core) outputs, forcing them to rise simultaneously and track each other. This eliminates timing mismatches that could cause latch-up or undefined states in DSPs. The PWRGD output remains low until both outputs exceed 93% of their respective reference voltages - confirming valid sequencing before releasing processor reset. The TPS56302PWP thus guarantees safe, repeatable power-up without external supervisors.

Can the TPS56302PWP be used with non-TI DSPs or FPGAs?

Yes, the TPS56302PWP is compatible with any processor requiring dual-rail power with programmable 1.3 V–3.3 V outputs and coordinated sequencing. Its tri-level VID interface supports nine standard voltage pairs (e.g., 1.5 V/1.8 V, 1.8 V/3.3 V), and external resistor dividers allow custom output settings outside those ranges. The device's wide 2.8 V–5.5 V input range, 2-A gate drivers, and robust protection (OVP/UVP/OCP) make it suitable for Xilinx/Altera FPGAs, ARM-based SoCs, and other embedded processors - provided the core/I/O voltage pairing and sequencing requirements align with the TPS56302PWP's fixed dual-path architecture.

What thermal management considerations apply to the TPS56302PWP in high-power designs?

The TPS56302PWP uses a PowerPAD™ package with an exposed thermal pad requiring soldering to a large copper pour for effective heat dissipation. With proper PCB layout (2 oz. copper, thermal vias), its junction-to-case thermal resistance is 0.72 °C/W, enabling up to 3.58 W continuous dissipation at T_A < 25°C. At 70°C ambient, derating reduces usable power to 1.96 W. Thermal shutdown activates at 145°C with 10°C hysteresis. To maintain reliability, designers must ensure the thermal pad is fully soldered, avoid isolating it from ground planes, and verify junction temperature using θ_JA values from the dissipation rating table - critical for sustained high-current operation of the TPS56302PWP.

How does the TPS56302PWP handle overcurrent protection for the ripple regulator output?

The TPS56302PWP implements adjustable overcurrent protection (OCP) for the ripple regulator using the OCP pin and an external resistor divider between the IOUT pin and ANAGND. The trip point is set to 125 mV typical, corresponding to the voltage drop across the high-side MOSFET's R_DS(on). When the sensed voltage exceeds this threshold, the device disables the high-side driver and latches off until INHIBIT is cycled or power is cycled. This lossless sensing method avoids power loss and board space associated with shunt resistors. The TPS56302PWP also includes short-circuit protection with 300–500 ns rising-edge delay on the LOSENSE path - ensuring fast fault response without false triggering during transients.