Texas Instruments TPS61024DRCRG4

Overview

TPS61024DRCRG4 from Texas Instruments is a fixed-output 3.3-V synchronous boost converter IC designed for single-cell battery-powered systems. It delivers up to 200 mA output current from 0.9-V to 6.5-V input, features 96% peak efficiency, 1500-mA switch current limit, and integrated low-battery comparator with LBI/LBO pins - used in portable medical devices and camera LED flash circuits.

For engineers reviewing the TPS61024DRCRG4 datasheet, TPS61024DRCRG4 pinout, TPS61024DRCRG4 application, or TPS61024DRCRG4 equivalent, key selection criteria include its fixed 3.3-V output, VSON-10 package thermal performance (RθJA = 47.2°C/W), down-regulation capability when V_IN ≥ V_OUT, and power-save mode control via PS pin.

Technical Context

The TPS61024DRCRG4 implements a fixed-frequency (480–720 kHz) PWM controller with synchronous rectification using integrated NMOS/PMOS switches. Its multiple feed-forward architecture monitors V_IN, V_OUT, and NMOS switch voltage drop to directly adjust duty cycle without relying solely on error amplifier loop dynamics.

It supports true down-regulation: when V_IN ≥ V_OUT, the PMOS rectifier operates in linear mode to regulate output, enabling stable 3.3-V supply from a fully charged 4.2-V Li-ion cell. Thermal shutdown (140°C) and undervoltage lockout (~0.8 V) are embedded for system-level protection.

Key Specifications

Pinout & Package

VSON-10 (DRC) package, 3.00 mm × 3.00 mm, PowerPAD™ exposed thermal pad requiring solder connection to PGND for thermal management and electrical stability.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar boost converter applications.

Compared with TPS61024DRCRG4, the TPS61025DRCRG4 and TPS61027DRCRG4 provide identical thermal performance, protection features, and package compatibility but deliver 5 V instead of 3.3 V - making them direct functional alternatives when output voltage is the sole differentiating requirement.

Availability

TPS61024DRCRG4 is available at Aetrix Electronics and suitable for portable audio players, personal medical products, camera LED flash lights, and cellular phones requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for TPS61024DRCRG4 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 company headquartered in Dallas, Texas, specializing in analog and embedded processing technologies with over 50 years of power management innovation.

The TPS6102x family was engineered specifically for ultra-low-input-voltage, high-efficiency boost conversion in single-cell battery systems - targeting portable consumer, medical, and industrial equipment where size, efficiency, and deep-discharge operation are critical.

FAQ

What is the minimum input voltage required for TPS61024DRCRG4 to start up?

The TPS61024DRCRG4 requires a minimum input voltage of 0.9 V to initiate startup under a 120-Ω load, as specified in the datasheet's electrical characteristics table. This enables operation from deeply discharged alkaline cells. Once running, it continues regulating down to 0.9 V, and its undervoltage lockout releases at approximately 0.8 V to prevent erratic behavior. The TPS61024DRCRG4 achieves this via optimized gate drive and low-threshold internal MOSFETs.

Does TPS61024DRCRG4 support output voltages higher than the input voltage?

Yes, the TPS61024DRCRG4 operates as a standard synchronous boost converter when V_IN < V_OUT, delivering regulated 3.3 V from inputs as low as 0.9 V. Crucially, it also supports down-regulation: when V_IN ≥ 3.3 V (e.g., 3.6–4.2 V from a Li-ion cell), it actively controls the PMOS rectifier in linear mode to maintain precise 3.3-V output - a feature confirmed in Section 10.3.3 of the SLVS451G datasheet.

How is the low-battery detection configured on TPS61024DRCRG4?

The TPS61024DRCRG4 uses the LBI pin with an internal 500-mV comparator threshold and 10-mV hysteresis. To set a custom battery cutoff (e.g., 2.8 V), connect a resistive divider from V_BAT to GND with R1 and R2 such that V_LBI = 500 mV at the desired V_BAT. The LBO pin outputs open-drain low when triggered and requires a 1-MΩ pull-up. The TPS61024DRCRG4 datasheet provides Equation 3 for exact resistor calculation.

Can TPS61024DRCRG4 operate without external feedback components?

Yes - the TPS61024DRCRG4 is the fixed 3.3-V variant of the TPS6102x family. Its output voltage is set internally via a precision resistor divider, so the FB pin is unused and must be left floating per datasheet guidance. This eliminates external resistor matching errors and layout sensitivity, simplifying design versus adjustable versions like TPS61020. All regulation accuracy (±3%) and line/load performance apply directly to the TPS61024DRCRG4.

What thermal considerations apply to TPS61024DRCRG4 in continuous 200-mA operation?

In continuous 200-mA output at 3.3 V with 1.2-V input, the TPS61024DRCRG4 dissipates ~0.4 W. With RθJA = 47.2°C/W and 25°C ambient, junction temperature rises ~19°C - well within the 125°C max rating. However, proper PowerPAD™ soldering to a 4-layer board with ≥2 in² copper pour is essential; RθJB = 21.6°C/W confirms board-level thermal path dominates. The TPS61024DRCRG4 includes thermal shutdown at 140°C with 20°C hysteresis for safety.