Texas Instruments TPS628510DRLR

Overview

TPS628510DRLR from Texas Instruments is a 0.5-A synchronous step-down DC/DC converter in an 8-pin SOT583 package, operating from 2.7 V to 6 V input and delivering adjustable output voltages from 0.6 V to 5.5 V with 1% feedback accuracy across –40°C to +150°C junction temperature. It features 2.25-MHz fixed-frequency PWM operation, forced-PWM/PFM mode selection, 17-µA quiescent current, and active output discharge-used in motor drives and factory automation power rails.

For engineers reviewing the TPS628510DRLR datasheet, TPS628510DRLR pinout, TPS628510DRLR application, or TPS628510DRLR equivalent, key selection criteria include its 0.5-A continuous output rating, SOT583 thermal performance (R_θJA = 110°C/W), soft-start control via external capacitor on SS/TR, precise enable threshold (1.1 V), and open-drain power-good output with window comparator.

Technical Context

The TPS628510DRLR uses peak current mode control with internal compensation, enabling stable regulation with low-ESR ceramic capacitors and no mandatory feedforward capacitor. Its 2.25-MHz switching frequency supports compact magnetics and EMI filtering while allowing external synchronization from 1.8 MHz to 4 MHz via the MODE/SYNC pin.

It supports three functional modes: forced PWM (MODE high), automatic PWM/PFM (MODE low), and 100% duty-cycle operation for ultra-low dropout. The device integrates undervoltage lockout (2.45–2.7 V rising threshold), thermal shutdown (170°C trip), and active output discharge-enabling safe rail sequencing and controlled power-down in industrial embedded systems.

Key Specifications

Pinout & Package

TPS628510DRLR is housed in an 8-pin SOT583 package (1.60 mm × 2.10 mm, including pins), optimized for high power density and thermal performance on standard PCBs with four-layer JEDEC layout.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar step-down converter applications.

Compared with TPS628511DRLR, the TPS628510DRLR offers lower thermal stress at light loads due to identical PFM efficiency but reduced conduction loss margin; versus TPS62860DRLR, it adds critical system-level functions-power-good signaling, external synchronization, and precise enable-justifying its use in industrial control and automated test equipment.

Availability

TPS628510DRLR is available at Aetrix Electronics and suitable for motor drives, factory automation, and building automation requiring stable component supply, long-term production continuity, and guaranteed traceability.

Supply support for TPS628510DRLR 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 ICs, with decades of expertise in high-reliability power conversion solutions.

The TPS62851x product line delivers high-efficiency, small-footprint DC/DC converters for space- and thermal-constrained industrial and automotive applications-designed specifically for seamless integration into PLCs, motor controllers, and smart sensors.

FAQ

What is the maximum continuous output current supported by the TPS628510DRLR?

The TPS628510DRLR supports 0.5-A continuous output current at junction temperatures up to 105°C, with derating above that temperature. Its current limit is specified at 1.6–2.5 A (DC), ensuring robust short-circuit protection while maintaining stable operation under nominal load conditions. This rating is validated per TI's SLUSDO4B datasheet Section 7.5.

Does the TPS628510DRLR require an external feedforward capacitor for stable operation?

No, the TPS628510DRLR does not require an external feedforward capacitor for basic stability-it operates reliably with only the recommended 2 × 10-µF ceramic output capacitors. However, adding a 10-pF feedforward capacitor across the feedback divider improves transient response, especially under fast load steps, as documented in Section 9.1 and Figure 8-1 of the TPS628510DRLR datasheet.

How does the soft-start function work on the TPS628510DRLR?

The TPS628510DRLR implements soft start via its SS/TR pin: an internal 2.5-µA current source charges an external capacitor to 0.6 V, defining the output voltage ramp time. For example, a 100-nF capacitor yields ~240 µs ramp time. The pin also supports tracking mode, allowing coordinated startup with other rails. This behavior is detailed in Sections 6 and 9.4.7 of the TPS628510DRLR datasheet.

Can the TPS628510DRLR synchronize to an external clock, and what is the valid frequency range?

Yes, the TPS628510DRLR can synchronize to an external clock applied to the MODE/SYNC pin across 1.8 MHz to 4 MHz. The device locks within 50 µs and maintains phase alignment with falling-edge detection. This allows precise timing coordination across multiple converters in noise-sensitive systems like test equipment or multi-channel data acquisition. Full specifications appear in Table 7-5 and Section 9.3.2.

What thermal metrics apply to the TPS628510DRLR in its SOT583 (DRL) package?

The TPS628510DRLR in the SOT583 (DRL) package has R_θJA = 110°C/W (JEDEC 4-layer board) and R_θJB = 20°C/W. These values reflect its high power density design-enabling 0.5-A operation without forced airflow in compact enclosures. Thermal performance is validated per JEDEC JESD51 standards and listed in Section 7.4 of the TPS628510DRLR datasheet.