Texas Instruments TPS650242RHBR

Overview

TPS650242RHBR from Texas Instruments is a highly integrated power management IC (PMIC) for single-cell Li-ion/Li-polymer systems, delivering three synchronous step-down converters (1.0 A / 0.8 A / 0.8 A), two 200 mA general-purpose LDOs, and one 30 mA always-on LDO (Vdd_alive). It supports dynamic voltage scaling on DCDC3 (1.0 V / 1.5 V), operates at 2.25 MHz switching frequency, and features PFM/PWM mode selection via MODE pin - used in ARM-based processors and cellular handsets.

For engineers reviewing the TPS650242RHBR datasheet, TPS650242RHBR pinout, TPS650242RHBR application, or TPS650242RHBR equivalent, key selection criteria include confirmed DCDC3 dual-voltage capability (1.0 V / 1.5 V), verified 32-pin VQFN (5 mm × 5 mm) package mapping, validated quiescent current (≤80 µA in PFM), and documented thermal shutdown (160 °C) and UVLO (2.35 V) thresholds.

Technical Context

The TPS650242RHBR integrates three independent buck converters with separate enable pins (EN_DCDC1/2/3), fixed-frequency PWM or adaptive PFM operation controlled by the MODE pin, and external voltage selection via DEFDCDC1/2/3 logic inputs. Its DCDC3 output is set to 1.0 V (DEFDCDC3 = LOW) or 1.5 V (DEFDCDC3 = HIGH), distinct from other family members like TPS650241 (0.9 V / 1.375 V).

All three buck stages use internal P- and N-channel MOSFETs (R_DS(ON) ≤ 698 mΩ), support input voltages from 2.5 V to 6 V, and feature soft-start (750 µs ramp time), overcurrent protection (ILIMF = 1.0–1.4 A), and thermal shutdown (160 °C with 20 °C hysteresis).

Key Specifications

Pinout & Package

TPS650242RHBR is housed in a 32-pin VQFN package (5.00 mm × 5.00 mm) with exposed thermal pad. Pin functions are fully defined per TI SLVS774C Rev C, including dedicated switch nodes (L1/L2/L3), feedback inputs (VDCDC1/VDCDC2/VDCDC3), and analog/digital ground separation (AGND1/AGND2, PGND1/PGND2/PGND3).

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS650242RHBR, TPS650241RHBR enables deeper voltage scaling (0.9 V) for peak performance, while TPS650243RHBR offers a 1.2 V core option with tighter regulation - both retain identical 32-pin VQFN packaging and LDO architecture but differ in DCDC3 voltage options and current capabilities.

Availability

TPS650242RHBR is available at Aetrix Electronics and suitable for smartphone power management, ARM-based embedded systems, and portable GPS units requiring stable component supply, long-term lifecycle support, and guaranteed traceable sourcing.

Supply support for TPS650242RHBR 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 specializing in analog, embedded processing, and power management technologies, with leadership in high-efficiency DC/DC conversion and battery-powered system solutions.

The TPS65024x product line was designed specifically for Li-ion/Li-polymer powered portable electronics, integrating multiple power rails, dynamic voltage scaling, and battery health monitoring in a space-constrained 5 mm × 5 mm package.

FAQ

What is the confirmed DCDC3 output voltage range for TPS650242RHBR?

The TPS650242RHBR supports two fixed DCDC3 output voltages: 1.0 V when DEFDCDC3 is logic LOW, and 1.5 V when DEFDCDC3 is logic HIGH. This dual-voltage capability is explicitly specified in the Voltage Options table of the SLVS774C datasheet and distinguishes TPS650242RHBR from other variants such as TPS650241RHBR (0.9 V / 1.375 V) and TPS650243RHBR (1.0 V / 1.2 V).

Does TPS650242RHBR support external adjustment of its LDO outputs?

Yes, TPS650242RHBR supports external adjustment of VLDO1 and VLDO2 via FB_LDO1 and FB_LDO2 pins using resistor dividers. Each LDO accepts input voltages from 1.5 V to 6.5 V and delivers up to 200 mA with output voltage programmable from 1.0 V to 3.3 V. The feedback reference voltage is 1.0 V, enabling precise ratio-based setting per the Electrical Characteristics table in Section 8.9.

What is the maximum switching frequency and associated inductor requirement for TPS650242RHBR?

The TPS650242RHBR operates at a nominal switching frequency of 2.25 MHz (range: 1.95–2.55 MHz). This high-frequency operation allows use of compact 2.2 µH shielded inductors (1.5–2.2 µH recommended per Section 8.3) and low-ESR ceramic output capacitors (10–22 µF), minimizing solution footprint for space-constrained portable designs.

How does the MODE pin affect efficiency and noise performance in TPS650242RHBR?

The MODE pin on TPS650242RHBR selects between automatic PFM/PWM mode (MODE = LOW) for highest light-load efficiency (≤80 µA quiescent current), and forced PWM mode (MODE = HIGH) for constant-frequency operation that simplifies EMI filtering and improves transient response. This dual-mode capability balances battery life and signal integrity without requiring external circuitry.

Is thermal shutdown protection implemented in TPS650242RHBR, and what are its thresholds?

Yes, TPS650242RHBR includes thermal shutdown protection that activates at a junction temperature of 160 °C, with 20 °C hysteresis for recovery. This safeguard is documented in Section 8.9 (Thermal Shutdown) of the SLVS774C datasheet and operates independently of other protections, ensuring safe operation under sustained overload or poor PCB thermal design.