Texas Instruments TPS62624YFFR

Overview

TPS62624YFFR from Texas Instruments is a 6-MHz synchronous step-down DC/DC converter in a 6-pin NanoFree™ WCSP package, delivering 1.2 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 active power-down sequencing with 15 Ω output discharge resistor - optimized for Li-ion–powered mobile phones and Bluetooth/WLAN subsystems.

For engineers reviewing the TPS62624YFFR datasheet, TPS62624YFFR pinout, TPS62624YFFR application, or TPS62624YFFR equivalent, key selection criteria include its fixed 1.2 V output, WCSP-6 thermal performance (130°C/W R_θJA), PFM ripple suppression, soft-start timing (120 μs), and mandatory MODE/EN pin termination per TI SLVS848D Rev D.

Technical Context

The TPS62624YFFR employs a frequency-locked ring-oscillating modulator architecture-eliminating traditional compensation loops-to achieve instantaneous load/line transient response without external stability components. Its non-linear control enables stable operation across 0.47 μH inductors and 4.7 μF ceramic capacitors while maintaining regulated 6 MHz switching under PWM mode.

Unlike linear regulators or conventional voltage-mode controllers, the device uses duty-cycle–derived internal ramp generation and comparator trip-based switching, with built-in undervoltage lockout (2.05 V threshold), thermal shutdown (140°C), and cycle-by-cycle P-channel MOSFET current limiting (1.1 A nominal). The integrated 15 Ω discharge path activates only during shutdown, distinguishing it from TPS62623/TPS62625 variants.

Key Specifications

Pinout & Package

TPS62624YFFR is housed in a 1.30 mm × 0.96 mm, 6-pin NanoFree™ (WCSP) package with bottom-side solder balls. Thermal resistance is 130°C/W (junction-to-ambient) and 22°C/W (junction-to-board), requiring minimal copper pour for handheld thermal management.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS62623YFFR, the TPS62624YFFR adds essential active discharge for controlled power sequencing; versus TPS62067QDSGRQ1, it trades automotive qualification for smaller size, higher frequency, and lower system-level EMI filter complexity in consumer portable designs.

Availability

TPS62624YFFR is available at Aetrix Electronics and suitable for mobile phone core rails, Bluetooth SoC supplies, GPS LNA biasing, and DTV tuner ASIC cores requiring stable component supply, long-lifecycle availability, and consistent wafer fab sourcing.

Supply support for TPS62624YFFR 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 space-constrained, battery-powered applications demanding ultra-low IQ, sub-1-mm solution size, and seamless PFM/PWM transition - targeting smartphones, wearables, and wireless sensor nodes.

FAQ

What is the output voltage tolerance of the TPS62624YFFR over temperature and line/load conditions?

The TPS62624YFFR delivers a fixed 1.2 V output with ±2% total DC voltage accuracy across –40°C to 85°C ambient temperature, 2.3–5.5 V input voltage, and 0–600 mA load current. This specification includes initial trim error, line regulation (0.13%/V), and load regulation (–0.0003%/mA), as verified in TI SLVS848D Section 7.5. No external resistors affect this tolerance since FB is internally tied.

Does the TPS62624YFFR require external compensation components?

No, the TPS62624YFFR does not require external compensation components. Its frequency-locked ring-oscillating modulator architecture eliminates traditional voltage-mode or current-mode control loops, enabling inherent stability with 0.47 μH inductors and 4.7 μF ceramic output capacitors. TI's reference design (SLVS848D Figure 5) confirms full stability without any RC networks or feedforward capacitors.

How does the MODE pin affect efficiency and noise performance in the TPS62624YFFR?

When MODE is pulled low, the TPS62624YFFR operates in auto PFM/PWM mode: PFM at light loads (31 μA IQ, low ripple) and PWM at >~100 mA (6 MHz, higher efficiency). When MODE is pulled high, it forces fixed-frequency PWM even at light loads - increasing IQ to ~7.6 mA but enabling predictable EMI filtering. This trade-off is documented in SLVS848D Section 8.3.1.

Can the TPS62624YFFR be used with input voltages below 2.3 V?

No, the TPS62624YFFR must not be operated below 2.3 V input. Its undervoltage lockout (UVLO) activates at 2.05 V (typical), preventing switching until VIN exceeds 2.1 V. Below 2.3 V, the device may fail to regulate or enter undefined states. For sub-2.3 V operation, consider TI's TPS6274x series or alternative architectures - the TPS62624YFFR is strictly rated for 2.3–5.5 V per Section 7.3.

What is the purpose of the integrated 15 Ω discharge resistor in the TPS62624YFFR?

The integrated 15 Ω discharge resistor in the TPS62624YFFR actively pulls down the output capacitor when EN is deasserted, ensuring rapid VOUT collapse during power-down sequencing. This eliminates hold-up voltage that could cause latch-up or improper reset in downstream logic. Unlike TPS62623/TPS62625, only TPS62624 includes this feature - confirmed in SLVS848D Section 8.4.4 and Device Comparison Table.