Texas Instruments TPS62870Z0WRXSR

Overview

TPS62870Z0WRXSR from Texas Instruments is a 6A synchronous step-down DC/DC converter with I²C interface, differential remote sensing, and stackable architecture for high-current FPGA/ASIC core supplies. It operates from 2.7V–6V input, delivers 0.4V–3.35V output with ±1% accuracy, and supports 1.5MHz–3.0MHz resistor-selectable switching frequency in a 2.55mm × 3.55mm VQFN-FCRLF (RXS) package.

For engineers reviewing the TPS62870Z0WRXSR datasheet, TPS62870Z0WRXSR pinout, TPS62870Z0WRXSR application, or TPS62870Z0WRXSR equivalent, this device enables precise point-of-load regulation in space-constrained, thermally demanding digital power rails where fast transient response, I²C programmability, and thermal warning capability are critical.

Technical Context

The TPS62870Z0WRXSR implements a fixed-frequency DCS-Control topology with inner emulated current loop, middle direct feedback loop, and outer voltage-regulating loop-enabling sub-10µs transient response to load steps. Its dual MOSFET power stage features 7mΩ high-side and 4.5mΩ low-side R_DS(on) at 3.3V VIN, supporting continuous 6A output up to 125°C junction temperature.

Differential remote sensing (VOSNS/GOSNS) maintains ±1% DC output accuracy across PCB IR drop and thermal drift. The I²C interface (up to 1MHz) provides real-time voltage monitoring, thermal warning flagging, and dynamic VOUT adjustment-while MODE/SYNC pin enables forced-PWM operation or external clock synchronization within ±10% duty cycle tolerance.

Key Specifications

Pinout & Package

The TPS62870Z0WRXSR is housed in a 2.55mm × 3.55mm × 1mm RXS (VQFN-FCRLF, 16-pin) package with wettable flanks and an exposed thermal pad soldered to GND for optimal thermal performance (R_θJA = 43.2°C/W JEDEC, 28°C/W EVM).

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS62871Z0WRXSR, the TPS62870Z0WRXSR offers lower current rating but identical programmability and sensing-making it ideal for optimized 6A designs. Against TPS62864ARQYR, it trades compactness for full telemetry and ±1% accuracy, targeting high-reliability digital power systems.

Availability

TPS62870Z0WRXSR is available at Aetrix Electronics and suitable for FPGA core supply, DDR memory regulation, and optical network power management requiring stable component supply, long-term lifecycle support, and traceable sourcing.

Supply support for TPS62870Z0WRXSR 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 mission-critical applications.

The TPS6287x product line was designed specifically for high-performance digital power delivery in FPGA, ASIC, and memory subsystems-emphasizing fast transient response, I²C configurability, and thermal robustness in ultra-compact packages.

FAQ

What is the default startup output voltage of the TPS62870Z0WRXSR?

The TPS62870Z0WRXSR has a factory-default startup output voltage of 0.800V, selected via internal VSEL configuration corresponding to I²C address 0x40. This value is set by a 6.2kΩ resistor from VSEL to GND per the device options table, and can be reconfigured using external resistor networks or I²C commands after power-up.

Does the TPS62870Z0WRXSR support stacking with other TPS6287x devices?

Yes, the TPS62870Z0WRXSR supports stacking with identical-current TPS6287x devices (e.g., other TPS62870 variants) using daisy-chained MODE/SYNC and SYNC_OUT pins. Stacking requires matching current ratings, shared COMP and EN nodes, and coordinated PG signaling-with only one primary device driving the open-drain PG output.

What is the maximum I²C clock frequency supported by the TPS62870Z0WRXSR?

The TPS62870Z0WRXSR supports I²C Fast Mode Plus operation up to 1MHz, with timing parameters validated for t_HIGH ≥ 0.26µs, t_LOW ≥ 0.5µs, and rise/fall times ≤120ns under 400pF bus capacitance-enabling rapid register reads and voltage updates in high-throughput power management systems.

How does the differential remote sensing work on the TPS62870Z0WRXSR?

The TPS62870Z0WRXSR uses dedicated VOSNS (output voltage sense) and GOSNS (output ground sense) pins to measure voltage directly at the load terminals. This differential measurement rejects voltage drop across PCB traces and connectors, ensuring ±1% DC output accuracy regardless of board layout or current level-critical for low-voltage, high-current digital rails.

What thermal protection features does the TPS62870Z0WRXSR include?

The TPS62870Z0WRXSR integrates a thermal warning flag that asserts at 150°C junction temperature (with 20°C hysteresis) and thermal shutdown at 170°C (also with 20°C hysteresis). Both flags are accessible via I²C status registers and can trigger system-level responses-providing layered protection without requiring external thermal sensors.