Texas Instruments TPS62151RGTR

Overview

TPS62151RGTR from Texas Instruments is a 3-V to 17-V, 1-A synchronous step-down DC-DC converter in a 3-mm × 3-mm VQFN-16 package, featuring DCS-Control™ topology, fixed 1.8-V output, and power-good (PG) open-drain output. It delivers up to 1 A continuous current with 17 µA typical quiescent current and supports seamless PWM-to-power-save mode transition for high efficiency across load range. Used in solid-state drives and embedded systems requiring compact, reliable POL regulation.

For engineers reviewing the TPS62151RGTR datasheet, TPS62151RGTR pinout, TPS62151RGTR application, or TPS62151RGTR equivalent, key selection considerations include its fixed 1.8-V output, 2.5-MHz/1.25-MHz selectable switching frequency, thermal shutdown at 160°C, undervoltage lockout at 2.7 V, and compatibility with low-ESR ceramic capacitors and small inductors.

Technical Context

The TPS62151RGTR implements DCS-Control™ topology-combining voltage-mode and hysteretic control-to achieve fast transient response, high output-voltage accuracy, and stable operation with minimal external components. Its internal error amplifier and direct-control comparator enable immediate reaction to output voltage changes while maintaining constant-frequency PWM under medium/heavy loads.

It operates in three functional modes: PWM (2.5 MHz or 1.25 MHz), power-save (frequency scales linearly with load), and 100% duty-cycle (for VIN near VOUT). The device integrates high-side (90 mΩ typ.) and low-side (40 mΩ typ.) MOSFETs, supports soft-start via external capacitor on SS/TR, and provides sequencing capability through EN and PG pins.

Key Specifications

Pinout & Package

TPS62151RGTR uses a 16-pin VQFN (RGT) package with 3.00 mm × 3.00 mm body size and exposed thermal pad soldered to AGND/PGND for optimal thermal dissipation and mechanical reliability.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS62151RGTR, TPS62152RGTR offers identical performance at 3.3 V but removes voltage margining flexibility, while TPS62130ARGTR trades fixed output and PG for adjustability and slightly higher quiescent current - making TPS62151RGTR optimal for 1.8-V, sequenced, low-power embedded rails.

Availability

TPS62151RGTR is available at Aetrix Electronics and suitable for solid-state drives, embedded systems, and mobile PCs requiring stable component supply, consistent parametric performance, and long-term production continuity.

Supply support for TPS62151RGTR 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 technologies, with decades of expertise in high-reliability DC-DC conversion.

The TPS6215x product line was designed specifically for high-density, high-efficiency point-of-load regulation in space-constrained applications such as SSDs, tablets, and microservers - emphasizing thermal performance, transient response, and ease of use.

FAQ

What is the output voltage tolerance of the TPS62151RGTR under full load and temperature range?

The TPS62151RGTR delivers a fixed 1.8-V output with initial accuracy of ±1.7% (785.6–814.4 mV at FB pin) under PWM operation. Over –40°C to +125°C junction temperature and full 1-A load, total output deviation-including line, load, and temperature effects-is typically within ±3%, verified by TI's production testing and documented in Section 7.5 of the SLVSAL5E datasheet. This ensures reliable operation for 1.8-V I/O standards like LPDDR4 and MIPI.

Does the TPS62151RGTR require an external feedback resistor network?

No, the TPS62151RGTR does not require external feedback resistors. It is a fixed-output variant with an internal resistive divider setting the output to 1.8 V. The FB pin is internally connected to this divider; TI recommends connecting FB directly to AGND in fixed-output versions to improve thermal performance and reduce noise susceptibility, as specified in Table 6-1 and Section 8.3.6 of the datasheet.

How does the TPS62151RGTR handle startup into a pre-biased output?

TPS62151RGTR supports monotonic pre-biased start-up: when enabled, it prevents both high-side and low-side MOSFETs from turning on until the internal soft-start ramp exceeds the existing output voltage. This avoids reverse current flow and potential damage to downstream circuitry. The behavior is enabled by default and requires no configuration - detailed in Section 8.3.2 and Figure 9-34 of the SLVSAL5E datasheet.

What is the minimum recommended output capacitance for stable operation of the TPS62151RGTR?

The TPS62151RGTR is optimized for use with low-ESR ceramic capacitors, and the typical application circuit (Figure 9-1) specifies 22 µF. TI validates stability with ≥22 µF total output capacitance (e.g., one 22-µF X5R 0805 capacitor). Using less than 22 µF may degrade transient response and increase output ripple beyond specification; layout parasitics and capacitor aging must also be considered per Section 11.1 of the datasheet.

Can the TPS62151RGTR operate with an input voltage below 3 V?

No, the TPS62151RGTR has a guaranteed operating input range of 3 V to 17 V per Section 7.3. Below 3 V, the device enters undervoltage lockout (UVLO) at approximately 2.7 V (with 200-mV hysteresis) and ceases switching. While it may briefly function near 2.8 V, TI does not characterize or guarantee performance below 3 V - using it outside this range risks instability, excessive dropout, or failure to regulate, especially under load.