Texas Instruments DPA02259RVER

Overview

TPS53513 from Texas Instruments is a synchronous step-down DC-DC converter IC designed for point-of-load regulation in high-performance digital systems. It delivers up to 8 A continuous output current, supports input voltages from 1.5 V to 18 V (with 4.5–25 V bias), regulates output from 0.6 V to 5.5 V with ±0.5% reference accuracy, and operates with D-CAP3™ adaptive on-time control-enabling fast load-step response in server CPU core supplies.

For engineers reviewing the TPS53513 datasheet, TPS53513 pinout, TPS53513 application, or TPS53513 equivalent, key selection criteria include its 28-pin VQFN-CLIP package, integrated 13.8-mΩ/5.9-mΩ MOSFETs, eight selectable switching frequencies (250–1000 kHz), FCCM/auto-skip mode flexibility, and pre-biased start-up capability for FPGA and DSP power rails.

Technical Context

The TPS53513 implements D-CAP3™ control using emulated current sensing-eliminating external compensation components while maintaining stability across wide VIN/VOUT ranges. Its adaptive on-time architecture dynamically adjusts switching frequency during transients to preserve regulation under rapid load changes.

It integrates dual power MOSFETs, a 5-V LDO (VREG) for internal bias and gate drive, programmable overcurrent protection via TRIP pin, open-drain PGOOD with 2-µs fault response, and thermal shutdown at 140°C with 40°C hysteresis-making it suitable for thermally constrained POL applications.

Key Specifications

Pinout & Package

TPS53513 uses a 28-pin VQFN-CLIP package (3.5 mm × 4.5 mm) with exposed thermal pad for enhanced heat dissipation. Pin numbering follows standard top-view orientation with Pin 1 at top-left corner.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar synchronous buck converter applications.

Compared with MP2315GJ-Z and RTQ2132BGQW, the TPS53513 provides unique integration of VREG LDO, TRIP-based OCP tuning, pre-biased start-up, and D-CAP3™ transient performance-making it optimal for space-constrained, high-reliability computing POLs where component count and transient fidelity are critical.

Availability

TPS53513 is available at Aetrix Electronics and suitable for server motherboard development, FPGA carrier board production, and ASIC-based industrial controller designs requiring stable component supply and long-term lifecycle support.

Supply support for TPS53513 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 and embedded processing technologies, with decades of expertise in power management ICs for computing, industrial, and automotive markets.

The TPS53513 belongs to TI's SWIFT™ synchronous buck converter product line, engineered specifically for high-efficiency, low-voltage, high-current point-of-load applications in datacenter, networking, and high-performance digital systems.

FAQ

What is the recommended input voltage range for reliable operation of the TPS53513?

The TPS53513 supports a main input voltage range of 1.5 V to 18 V on VIN pins and a separate 4.5 V to 25 V bias range on VDD. For stable operation, maintain VIN ≥ 1.5 V and VDD ≥ 4.5 V under all load and temperature conditions. The device includes VDD UVLO (4.25 V typical wake-up) and VREG UVLO (3.34 V) to prevent erratic behavior during brownout events. Always verify minimum startup thresholds per your specific application's cold-start requirements.

How does the TPS53513 achieve fast load-step response without external compensation?

The TPS53513 achieves sub-10-µs load-step response using D-CAP3™ control with adaptive on-time architecture and emulated current sensing. This eliminates the need for external phase-compensation components by embedding dynamic ramp generation and internal loop stabilization. The control scheme directly senses output impedance changes and adjusts on-time in real time-enabling stable regulation across 0.6–5.5 V outputs with ceramic-only output capacitors, as confirmed in TPS53513 datasheet Figure 19–20.

Can the TPS53513 start up into a pre-biased output voltage?

Yes, the TPS53513 supports pre-biased start-up. When enabled, it actively controls the high-side MOSFET to prevent reverse current flow into a pre-charged output rail. This capability is verified in datasheet Figure 21 and 23, where the device ramps output from 0.6 V to target (e.g., 1.2 V) without discharging the existing voltage. Pre-bias operation requires proper soft-start timing (1 ms) and is compatible with both FCCM and auto-skip modes.

What is the function of the TRIP pin on the TPS53513, and how is it configured?

TRIP is a current-sense threshold programming pin that sets the valley overcurrent limit (IOCL) by sourcing a 10-µA reference current into an external resistor. With RTRIP = 34.8 kΩ, IOCL = 6.2–9.8 A; with RTRIP = 25.5 kΩ, IOCL = 4.2–8.2 A. The pin enables precise, adjustable OCP without additional sensing components. Configuration is detailed in Section 6.5 and Figure 31 of the TPS53513 datasheet, and resistor tolerance should be ≤1% for accurate trip-point setting.

Does the TPS53513 require external components for bootstrap operation, and what are the requirements?

Yes, the TPS53513 requires an external bootstrap capacitor between VBST and SW pins. TI recommends a 0.1-µF X7R ceramic capacitor rated ≥16 V, placed as close as possible to the VBST/SW pins. The internal bootstrap PMOS switch charges this capacitor during low-side conduction; insufficient capacitance or poor placement causes high-side gate drive failure and erratic switching. Layout guidelines in Section 10.2 of the TPS53513 datasheet specify trace width, length, and grounding practices to ensure reliable bootstrapping.