Texas Instruments TPS62679ZYFMR

Overview

TPS62679ZYFMR from Texas Instruments is a 6-MHz synchronous step-down DC-DC converter in PicoStar™ 6-pin CSP packaging (1.22 mm × 0.85 mm, height < 0.4 mm), delivering 1.26 V at up to 500 mA output current with ±2% total DC voltage accuracy. It operates from 2.3 V to 4.8 V input (Li-ion compatible), features 17 µA quiescent current in PFM mode, and integrates spread-spectrum PWM for low-noise operation in smartphone camera modules.

For engineers reviewing the TPS62679ZYFMR datasheet, TPS62679ZYFMR pinout, TPS62679ZYFMR application, or TPS62679ZYFMR equivalent, key selection criteria include its extended start-up time (430 µs), output discharge capability, 1.26 V fixed output, and compatibility with 0603 inductors and 0402 ceramic capacitors in sub-10 mm² layouts.

Technical Context

The TPS62679ZYFMR employs a frequency-locked ring-oscillating modulator architecture-eliminating traditional compensation loops-to achieve instantaneous transient response and enable ultra-small passive components. Its dual-mode operation (PFM at light load, regulated 6-MHz PWM at higher loads) is controlled via MODE pin logic and supports external clock presence detection (4–27 MHz).

Unlike linear regulators, it delivers >90% efficiency across 1 mA–500 mA loads while maintaining low output ripple (16 mVPP at 1 mA) and ≥35 dB PSRR from 1 kHz to 10 kHz. The integrated P/N-channel MOSFETs feature rDS(on) of 170 mΩ (P-ch) and 120 mΩ (N-ch) at 3.6 V, with thermal shutdown at 140°C and hysteresis of 10°C.

Key Specifications

Pinout & Package

PicoStar™ (6-pin CSP), 1.22 mm × 0.85 mm, 0.4 mm max height - optimized for ultra-thin mobile PCBs with minimal board area and thermal resistance (RθJB = 53°C/W).

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS62674YFD and TPS626751YFD, the TPS62679ZYFMR uniquely provides extended 430 µs start-up time for synchronized camera power sequencing - a design-critical feature absent in both alternatives, making it irreplaceable in time-aligned imaging subsystems.

Availability

TPS62679ZYFMR is available at Aetrix Electronics and suitable for smartphone camera modules, optical data modules, and wearable sensor hubs requiring stable component supply with guaranteed long-term availability and traceable sourcing.

Supply support for TPS62679ZYFMR 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 portable electronics.

The TPS6267x family was designed specifically for ultra-compact, high-efficiency power delivery in battery-powered imaging and connectivity subsystems - prioritizing low profile, low IQ, and noise performance over general-purpose flexibility.

FAQ

What is the fixed output voltage of the TPS62679ZYFMR?

The TPS62679ZYFMR has a factory-trimmed fixed output voltage of 1.26 V with ±2% total DC accuracy across input voltage, load current (0–500 mA), and temperature (–40°C to +85°C). This value is confirmed in the Electrical Characteristics table of the SLVS952G datasheet and applies specifically to the TPS62679ZYFMR variant - not other members of the TPS6267x family.

Does the TPS62679ZYFMR support external clock synchronization?

Yes, the TPS62679ZYFMR supports external clock presence detection on the EN pin for automatic wake-up, with a valid input frequency range of 4 MHz to 27 MHz and duty cycle between 40% and 60%. This feature is explicitly documented in the Electrical Characteristics section for TPS62679, and the start-up time of 430 µs is measured from EXTCLK activation - confirming its role in clock-synchronized power sequencing.

What is the thermal performance of the TPS62679ZYFMR in its PicoStar package?

The TPS62679ZYFMR in YFM (PicoStar) package has a junction-to-board thermal resistance (RθJB) of 53°C/W, as specified in the Thermal Information table. Its maximum operating junction temperature is 125°C, and thermal shutdown activates at 140°C with 10°C hysteresis. These values are measured per JEDEC JESD51 standards and apply directly to the TPS62679ZYFMR device marking.

How does the output discharge function work on the TPS62679ZYFMR?

The TPS62679ZYFMR integrates an internal 70–150 Ω discharge resistor between VOUT and GND that activates during shutdown (when EN is low). This feature is confirmed in the Electrical Characteristics table under "rDIS" and is shared with TPS62674/TPS626751/TPS626765. It ensures rapid VOUT decay to prevent back-powering of downstream logic, which is essential for clean power-state transitions in camera modules.

What are the recommended external components for the TPS62679ZYFMR?

The TPS62679ZYFMR requires three surface-mount components: a 0603-size inductor (e.g., Murata LQM21PN1R0NGR, 1.0 µH), a 0402 input capacitor (2.2 µF, X5R), and a 0402 output capacitor (4.7 µF, X5R). These values and footprints are validated in the Typical Applications section and Parameter Measurement Information (Figure 24) of the SLVS952G datasheet for the TPS62679ZYFMR.