Texas Instruments TPS62240DRVR

Overview

TPS62240DRVR from Texas Instruments is a synchronous step-down DC-DC converter optimized for battery-powered portable electronics. It delivers up to 300 mA output current from 2 V–6 V input, supports adjustable output voltage (0.6 V to VIN), operates at 2.25 MHz fixed frequency, and enters power-save mode at light loads to maintain >94% peak efficiency - used in mobile phone core logic rails and Bluetooth headset power supplies.

For engineers reviewing the TPS62240DRVR datasheet, TPS62240DRVR pinout, TPS62240DRVR application, or TPS62240DRVR equivalent, key selection criteria include its 6-pin 2 mm × 2 mm WSON package, MODE pin-controlled PWM/PFM transition, 15 μA quiescent current in PFM mode, and 100% duty-cycle low-dropout operation down to ~1.85 V input.

Technical Context

The TPS62240DRVR implements voltage-mode control with input-voltage feed-forward for fast line/load regulation and stable operation with small ceramic capacitors. Its dual-mode architecture uses a 2.25-MHz oscillator for PWM operation and automatic PFM entry below ~10 mA load, minimizing output ripple via single-threshold PFM comparator.

It integrates high-side (240–480 mΩ) and low-side (180–380 mΩ) MOSFETs, features undervoltage lockout (1.85 V falling threshold), thermal shutdown (140°C), and soft-start (250 μs ramp time). The MODE pin enables real-time switching between fixed-frequency PWM and adaptive PFM - critical for noise-sensitive RF sections and ultra-low-power standby states.

Key Specifications

Pinout & Package

The TPS62240DRVR is housed in a thermally enhanced 6-pin WSON package (2.00 mm × 2.00 mm × 0.8 mm) with exposed thermal pad (Pin 6 = GND). This package enables <1-mm solution height and improves power dissipation over SOT-23 alternatives.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS62243DRVR, the TPS62240DRVR offers design flexibility through adjustable output voltage at the cost of two external resistors; compared with TPS62260DRVR, it trades maximum current capability for lower quiescent current - making it optimal for ultra-low-power, size-constrained applications where 300 mA suffices.

Availability

TPS62240DRVR is available at Aetrix Electronics and suitable for Bluetooth headsets, mobile phones, and WLAN modules requiring stable component supply, long-term lifecycle support, and consistent parametric performance across production batches.

Supply support for TPS62240DRVR 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 connectivity technologies, with decades of expertise in power management ICs for portable and industrial applications.

The TPS6224x product line was designed specifically for space- and power-constrained battery-operated devices - emphasizing high efficiency across load range, minimal solution size, and robust operation from depleted battery voltages.

FAQ

What is the minimum input voltage required for TPS62240DRVR to regulate a 1.2 V output at 300 mA?

The minimum input voltage depends on load current, output voltage tolerance, and MOSFET R_DS(on). For 1.2 V output at 300 mA, VIN_min ≈ 1.2 V + (0.3 A × 0.48 Ω) + inductor DCR. With typical 110 mΩ inductor, VIN_min ≈ 1.36 V - but undervoltage lockout (1.85 V falling) prevents operation below that threshold. Thus, TPS62240DRVR maintains regulation down to ~1.85 V input for this condition.

Can TPS62240DRVR be used with a 1 µH inductor instead of the recommended 2.2 µH?

Yes, TPS62240DRVR supports inductors from 1.5 µH to 4.7 µH per datasheet Section 9.2.2.2. A 1 µH inductor falls below the 1.5 µH lower limit and risks instability, excessive ripple, and reduced efficiency. Use only ≥1.5 µH inductors rated for ≥400 mA saturation current and ≤150 mΩ DCR to ensure stable PWM/PFM transition and thermal safety.

How does the MODE pin affect efficiency and noise performance of TPS62240DRVR?

When MODE = GND, TPS62240DRVR enters power-save mode at light loads, reducing switching frequency and quiescent current to 15 µA - maximizing efficiency but increasing output voltage ripple. When MODE = VIN, it forces fixed 2.25 MHz PWM operation regardless of load, lowering ripple and enabling predictable EMI filtering but reducing light-load efficiency by ~10–15%.

Is TPS62240DRVR RoHS-compliant and lead-free?

Yes, TPS62240DRVR is RoHS-compliant and lead-free per Texas Instruments' packaging standards. The WSON-6 package uses matte tin (Sn) lead finish, meets JEDEC J-STD-020 moisture sensitivity level 2a, and is compatible with standard Pb-free reflow profiles (peak 260°C).

What is the thermal performance difference between TPS62240DRVR in WSON-6 and the SOT-23-5 variant?

TPS62240DRVR in WSON-6 has R_θJA = 67.8°C/W, while the SOT-23-5 (TPS62240DDCR) has R_θJA = 226.9°C/W - a 3.3× improvement. This allows the WSON package to sustain 300 mA continuous output at ambient temperatures up to 70°C without derating, whereas the SOT-23-5 requires significant current reduction above 40°C ambient.