Texas Instruments TPS5300DAPRG4

Overview

TPS5300DAPRG4 from Texas Instruments is a hysteretic synchronous-buck controller with integrated dual linear regulator drivers for mobile CPU core, I/O, and clock voltage regulation. It supports 3 V–28 V input, delivers programmable core output from 0.925 V to 2.0 V in 25/50-mV steps via 5-bit VID, features 2-A typical gate drivers, active droop compensation, and 1% reference accuracy. It targets Intel SpeedStep™ and AMD PowerNow!™ mobile processor power delivery.

For engineers reviewing the TPS5300DAPRG4 datasheet, TPS5300DAPRG4 pinout, TPS5300DAPRG4 application, or TPS5300DAPRG4 equivalent, key selection criteria include dynamic VID transition capability, three-output coordinated soft-start, adaptive dead-time control, and integrated overvoltage/undervoltage/current/fault protection with latch enable/disable flexibility.

Technical Context

The TPS5300DAPRG4 implements a ripple-based hysteretic control architecture with fast transient response and no external compensation required. Its core regulator uses a high-gain differential current-sense amplifier (25 V/V gain) and programmable hysteresis (±15 mV to ±30 mV) set via VREFB–VHYST divider.

It integrates two independent linear regulator controllers (DRV_IO and DRV_CLK) driving external NPN transistors for I/O (1.5 V typical) and CLK (2.5 V typical) rails, each with closed-loop accuracy ≤±1.7%. The adaptive dead-time circuit minimizes shoot-through while maintaining >50 ns nonoverlap between TG and BG signals.

Key Specifications

Pinout & Package

TPS5300DAPRG4 is housed in a thermally enhanced 32-pin TSSOP PowerPAD™ package (8.1 mm × 11 mm), with exposed thermal pad soldered to PCB ground plane for improved junction-to-case thermal resistance (0.72 °C/W).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar multi-rail CPU power controller applications.

Compared with TPS5300DAPRG4, TPS51020DAPR lacks integrated linear regulator control and rail coordination, while ISL6260CRZ replaces analog VID with digital configuration - making TPS5300DAPRG4 uniquely suited for analog VID–based mobile CPU platforms requiring hardware-managed triple-rail sequencing and droop compensation.

Availability

TPS5300DAPRG4 is available at Aetrix Electronics and suitable for Intel SpeedStep™ platforms, AMD PowerNow!™ systems, and DSP point-of-load applications requiring stable component supply across extended production lifecycles.

Supply support for TPS5300DAPRG4 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 high-efficiency DC/DC conversion.

The TPS5300DAPRG4 belongs to TI's mobile CPU power controller product line, designed specifically to meet the dynamic voltage scaling, fast transient, and multi-rail coordination requirements of notebook and ultra-mobile computing platforms.

FAQ

What is the function of the DROOP pin on the TPS5300DAPRG4?

The DROOP pin on the TPS5300DAPRG4 accepts a scaled version of the current-sense amplifier output (IOUT) to implement active voltage droop positioning. By connecting an external resistor divider from the core output to DROOP, the controller dynamically lowers the voltage setpoint under load - reducing output capacitor requirements and improving dynamic regulation during load transients. This feature is essential for meeting Intel VRM specifications.

How does the TPS5300DAPRG4 coordinate startup of its three regulated outputs?

The TPS5300DAPRG4 coordinates startup using a shared slow-start circuit referenced to the SLOWST pin. A single capacitor from SLOWST to ANAGND sets the ramp time, and all three outputs - core (buck), I/O (linear), and CLK (linear) - track the same rising voltage reference. This ensures monotonic, simultaneous power-up without sequencing conflicts, critical for mobile CPUs that require strict rail-ordering.

Can the TPS5300DAPRG4 be used with non-VID CPUs or fixed-voltage applications?

Yes - the TPS5300DAPRG4 supports fixed-voltage operation by tying VID0–VID4 to appropriate logic levels (e.g., VID4=1, VID3–VID0=0 for 0.925 V). Its hysteretic architecture and programmable hysteresis (via VHYST) allow stable regulation without external compensation, making it viable for non-CPU applications like FPGA or ASIC core supplies where precise, low-noise 1.0–1.8 V rails are needed.

What thermal performance can be expected from the TPS5300DAPRG4 in its TSSOP PowerPAD package?

With the thermal pad soldered to a 2-oz copper plane and standard vias, the TPS5300DAPRG4 achieves a junction-to-case thermal resistance of 0.72 °C/W and supports 6.25 W continuous power dissipation at TC = 25°C. Under typical 12-V input, 1.2-V/15-A core operation, thermal simulation shows TJ ≈ 95°C - well within the 125°C maximum rating - provided minimum PCB copper area and thermal via guidelines per SLMA002 are followed.

Does the TPS5300DAPRG4 support automatic frequency scaling at light loads?

Yes - the PSM/LATCH pin enables Power Saving Mode, which automatically reduces switching frequency under light load to minimize switching losses. Four frequency modes are selectable via resistor networks tied to PH and RAMP. When PSM is enabled, the controller transitions smoothly between high-frequency (full-load) and low-frequency (light-load) operation without audible noise or regulation discontinuity - boosting efficiency by up to 8% at 10% load.