Texas Instruments TPS62240DRVT

Overview

TPS62240DRVT 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 to 6 V input, features adjustable 0.6 V–VIN output voltage, operates at 2.25 MHz fixed switching frequency, and enters power save mode (PFM) at light loads to maintain >94% peak efficiency - deployed in Bluetooth headsets and mobile phone core logic rails.

For engineers reviewing the TPS62240DRVT datasheet, TPS62240DRVT pinout, TPS62240DRVT application, or TPS62240DRVT equivalent, key selection criteria include its 6-pin WSON (2 mm × 2 mm) package, MODE pin-controlled PWM/PFM transition, 15 μA quiescent current in PFM, ±1.5% output voltage accuracy in PWM mode, and 100% duty cycle low-dropout operation down to VIN ≈ VOUT.

Technical Context

The TPS62240DRVT uses voltage-mode control with input voltage feed-forward for fast line/load regulation and stable operation with small ceramic capacitors. Its dual-mode architecture switches between 2.25-MHz PWM (moderate/heavy load) and discontinuous-conduction PFM (light load), with automatic transition triggered by zero-crossing detection on the low-side MOSFET current.

It integrates high-side (480 mΩ max R_DS(on)) and low-side (380 mΩ max R_DS(on)) synchronous MOSFETs, a 0.6 V internal reference, undervoltage lockout (1.85 V falling threshold), thermal shutdown (140 °C), and soft-start (250 μs ramp time). The MODE pin - present only in WSON packages - enables forced PWM or auto PFM selection without PCB layout changes.

Key Specifications

Pinout & Package

TPS62240DRVT is housed in a thermally enhanced 6-pin WSON package (2.00 mm × 2.00 mm × 0.80 mm) with exposed thermal pad (Pin 6 = GND). This package supports high power density and improved thermal performance over the SOT-5 variant.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS62240DRVT, TPS62243DRVT eliminates external feedback components for 1.8 V use cases, while TPS62260DRVR doubles output current capacity within the same 2 mm × 2 mm footprint - both retain MODE pin functionality and 2.25 MHz operation but differ in output voltage flexibility and thermal design constraints.

Availability

TPS62240DRVT is available at Aetrix Electronics and suitable for Bluetooth headsets, mobile phone application processors, and WLAN modules requiring stable component supply across production lifecycles.

Supply support for TPS62240DRVT 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.

The TPS6224x product line was designed specifically for space-constrained, battery-operated portable electronics requiring high efficiency across wide load ranges - emphasizing small solution size, low quiescent current, and seamless light-load mode transitions.

FAQ

What is the maximum output current capability of the TPS62240DRVT?

The TPS62240DRVT delivers up to 300 mA of continuous output current when operating within its recommended conditions (VIN = 2–6 V, TA = –40°C to 85°C). At input voltages below 2.3 V, the maximum output current is derated to 150 mA to maintain regulation and thermal safety. This rating assumes proper PCB thermal design with the exposed GND pad soldered to a thermal plane.

How does the MODE pin affect the operation of the TPS62240DRVT?

The MODE pin on the TPS62240DRVT selects between two operating modes: pulling MODE to GND enables automatic power save mode (PFM at light loads, PWM at heavy loads), while pulling MODE to VIN forces fixed-frequency 2.25 MHz PWM operation regardless of load. This pin is exclusive to the WSON-6 package (DRVT) and provides system-level control over efficiency/noise trade-offs in noise-sensitive applications like audio subsystems.

What is the purpose of the soft-start function in the TPS62240DRVT?

Soft-start in the TPS62240DRVT limits inrush current during power-up by controlling the output voltage ramp rate. The output rises from 5% to 95% of its nominal value within 250 µs after EN is asserted, preventing input voltage sag on weak sources like coin-cell batteries or high-impedance power rails. This feature is integral to the TPS62240DRVT's internal control circuitry and requires no external components.

Can the TPS62240DRVT operate with an input voltage lower than its output voltage?

No - the TPS62240DRVT is a step-down (buck) converter and cannot regulate when VIN falls below the programmed VOUT. However, it supports 100% duty cycle operation as VIN approaches VOUT, maintaining regulation down to VIN ≈ VOUT + (IOUT × RDS(on)_HS) + (IOUT × R_L). For example, with 300 mA load, 480 mΩ high-side R_DS(on), and 110 mΩ inductor DCR, minimum VIN is ~1.8 V for a 1.2 V output - extending usable battery range significantly.

What package type and dimensions does the TPS62240DRVT use?

The TPS62240DRVT uses a 6-pin WSON package measuring 2.00 mm × 2.00 mm × 0.80 mm with an exposed thermal pad (Pin 6). This package is distinct from the SOT-5 variant (DDC) and offers superior thermal performance (R_θJA = 67.8 °C/W vs. 226.9 °C/W) and smaller footprint - critical for ultra-compact portable designs where board area and thermal management are tightly constrained.