Texas Instruments TPS62620YFDR

Overview

TPS62620YFDR from Texas Instruments is a 6-MHz synchronous step-down DC/DC converter in NanoFree™ WCSP packaging, delivering 1.82 V at up to 600 mA from 2.3–5.5 V input. It features automatic PFM/PWM mode switching, 31 μA quiescent current, ±2% DC output accuracy, and integrated soft-start for Li-ion–powered portable systems including smartphones and Bluetooth modules.

For engineers reviewing the TPS62620YFDR datasheet, TPS62620YFDR pinout, TPS62620YFDR application, or TPS62620YFDR equivalent, key selection criteria include its 6-MHz fixed-frequency PWM operation, ultra-low I_Q, chip-scale package footprint (<12 mm²), and seamless light-load PFM transition-critical for battery runtime and noise-sensitive RF subsystems.

Technical Context

The TPS62620YFDR uses a frequency-locked ring-oscillating modulator architecture with no traditional compensated feedback loop, enabling instantaneous transient response and inherent stability across L/C variations. Its PFM/PWM auto-switching is governed by load current thresholds, with PFM delivering low ripple and 31 μA I_Q at light loads, while PWM ensures fixed 6 MHz operation under moderate-to-heavy loads.

Control logic integrates undervoltage lockout (2.05 V threshold), thermal shutdown (140°C trip), and cycle-by-cycle P-channel current limiting (1.1 A nominal). The MODE pin selects between auto-switching (MODE = GND) and forced PWM (MODE = high), directly affecting EMI filtering strategy and efficiency trade-offs.

Key Specifications

Pinout & Package

TPS62620YFDR is housed in a 6-pin DSBGA (NanoFree™ WCSP) package measuring 1.30 mm × 0.96 mm with 0.5-mm pitch, optimized for ultra-compact PCB layouts in space-constrained mobile applications.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS62621YFDR, the TPS62620YFDR provides 20 mV higher nominal output-beneficial for noise margin in mixed-signal rails-while sharing identical efficiency, quiescent current, and thermal performance. Against TPS62067QDSGRQ1, it trades automotive qualification and adjustability for smaller size, lower BOM count, and faster design-in in consumer portable systems.

Availability

TPS62620YFDR is available at Aetrix Electronics and suitable for smartphone power management, BLE module design, GPS receiver front-ends, and DTV tuner applications requiring stable component supply, long-term lifecycle support, and consistent wafer fabrication lots.

Supply support for TPS62620YFDR 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-efficiency DC/DC conversion for portable electronics.

The TPS6262x product line was engineered specifically for ultra-thin, battery-constrained mobile devices-prioritizing minimal solution size, sub-100-μA quiescent current, and seamless PFM/PWM transitions without external compensation.

FAQ

What is the exact output voltage tolerance of the TPS62620YFDR over temperature and line/load conditions?

The TPS62620YFDR delivers 1.82 V with ±2% total DC voltage accuracy across –40°C to 85°C ambient temperature, 2.3–5.5 V input, and 0–600 mA load. This includes initial tolerance, line regulation (0.13%/V), load regulation (–0.0003%/mA), and thermal drift-all guaranteed in the datasheet's Electrical Characteristics table. The TPS62620YFDR achieves this without external feedback components due to factory trimming of its internal resistor divider.

Does the TPS62620YFDR support forced PWM mode, and how is it enabled?

Yes, the TPS62620YFDR supports forced PWM mode via the MODE pin. Pulling MODE high (to VIN) disables automatic PFM entry and locks the device into regulated 6 MHz PWM operation-even at light loads. This reduces output voltage ripple and simplifies EMI filtering but increases light-load quiescent current from 31 μA to ~7.6 mA. The TPS62620YFDR's MODE pin must never be left floating; a defined logic level is required for reliable operation.

What is the recommended inductor value for optimal efficiency and transient response with the TPS62620YFDR?

Texas Instruments recommends a 0.47 μH inductor (e.g., Murata LQM21PNR47MC0) for the TPS62620YFDR to balance efficiency, transient response, and solution size. This value aligns with the device's internal compensation and yields 90% peak efficiency at 600 mA. Inductors from 0.3 μH to 1.3 μH are supported; lower values improve transient response but increase ripple current, while higher values reduce ripple and I_RMS loss at the cost of slower load-step recovery. The TPS62620YFDR's control architecture remains stable across this range without external compensation.

How does the TPS62620YFDR handle short-circuit conditions, and what protection mechanisms are active?

The TPS62620YFDR integrates cycle-by-cycle P-channel MOSFET current limiting (1.1 A nominal) and thermal shutdown (140°C trip with 10°C hysteresis). During a short circuit, the P-MOS current limit activates immediately, clamping output current and preventing damage. If sustained, junction temperature rises until thermal shutdown disables both FETs. The TPS62620YFDR also reduces current limit to 550 mA during startup (until VOUT > 0.5 V) to prevent inrush-related overstress-a safeguard critical when driving capacitive or current-sink loads.

Is the TPS62620YFDR pin-compatible with other members of the TPS6262x family, and can it be substituted on existing PCBs?

Yes, all TPS6262x variants-including TPS62620YFDR, TPS62621YFDR, and TPS62622YFDR-share identical 6-pin DSBGA (YFD) packaging, pinout, and footprint. They differ only in fixed output voltage (1.82 V, 1.8 V, 1.5 V) and minor electrical specs like R_DS(on). Therefore, TPS62620YFDR is a direct PCB replacement for other YFD-packaged TPS6262x parts where 1.82 V output is required, requiring no layout changes or rework.