Texas Instruments TPS65052RSMT

Overview

TPS65052RSMT from Texas Instruments is a 6-channel power-management IC integrating two step-down DC-DC converters (DCDC1 = 1 A at 3.3 V, DCDC2 = 600 mA at 1 V / 1.3 V) and four low-input-voltage LDOs (two 400-mA, two 200-mA) for single-cell Li-Ion/Li-Polymer systems. It supports digital voltage selection via DEF pins, 2.25-MHz fixed-frequency operation, and power-save mode for high efficiency across load ranges - deployed in OMAP™ and S3C24xx application processor power supplies.

For engineers reviewing the TPS65052RSMT datasheet, TPS65052RSMT pinout, TPS65052RSMT application, or TPS65052RSMT equivalent, key selection criteria include its fixed-output DCDC1/DCDC2 configuration, dual enable-controlled LDO banks, 32-pin VQFN package with thermal pad, and compatibility with battery-powered portable media and smartphone baseband subsystems.

Technical Context

The TPS65052RSMT implements two synchronous buck converters operating out-of-phase at 2.25 MHz to reduce input ripple, with DCDC1 optimized for I/O rail (3.3 V, 1 A) and DCDC2 for core voltage (1 V or 1.3 V, 600 mA) selected by DEFDCDC2 logic level. Each converter features 100% duty-cycle capability, ±1% output accuracy in PWM mode, and integrated P/N-channel MOSFETs with rDS(on) ≤630 mΩ (P-ch) and ≤450 mΩ (N-ch).

Four LDOs are digitally configurable via DEFLDO1–DEFLDO4 inputs: LDO1/LDO2 deliver 400 mA each with 280–400 mV dropout at full load; LDO3/LDO4 supply 200 mA each with 280 mV dropout and 70 dB PSRR at 10 kHz. All LDOs accept 1.5–6.5 V input and support independent enable control, reset generation, and push-button ON/OFF sequencing via PB_IN/PB_OUT.

Key Specifications

Pinout & Package

TPS65052RSMT uses a 32-pin VQFN package (RSM) with 4.0 mm × 4.0 mm body and exposed thermal pad soldered to PCB ground for thermal management. Pin numbering follows top-view layout with pin 1 at top-left corner.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar power-management IC applications.

Compared with TPS65056RSMT and TPS65051RSMT, the TPS65052RSMT offers lowest BOM count and smallest PCB area for fixed-rail applications, trading configurability for integration density and ease of qualification - critical for cost-sensitive consumer electronics.

Availability

TPS65052RSMT is available at Aetrix Electronics and suitable for smartphone baseband power, OMAP™ application processor supply, and portable media player subsystems requiring stable component supply and long-term lifecycle support.

Supply support for TPS65052RSMT 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 technologies, with over 90 years of innovation in energy-efficient electronics.

The TPS6505x family was designed specifically for single-cell Li-Ion/Li-Polymer portable systems needing compact, highly integrated power solutions - targeting smartphones, PDAs, and application-processor-based embedded devices.

FAQ

What is the DCDC1 output voltage and current capability of the TPS65052RSMT?

The TPS65052RSMT has a fixed 3.3-V output for DCDC1 with up to 1 A continuous current. This rail is intended for system I/O voltage and does not require external feedback components. The device achieves ±1% output accuracy in PWM mode and supports 100% duty cycle for ultra-low dropout operation when input voltage approaches 3.3 V.

How does the DEFDCDC2 pin configure the TPS65052RSMT DCDC2 output?

The DEFDCDC2 pin on the TPS65052RSMT selects between two fixed DCDC2 output voltages: logic high sets 1.3 V, logic low sets 1.0 V. This digital selection eliminates external resistor dividers and simplifies board layout. The pin is sampled at power-up and remains latched until reset or power cycle.

Can the TPS65052RSMT support independent power-rail sequencing?

Yes, the TPS65052RSMT supports full independent sequencing via 11 dedicated enable inputs: EN_DCDC1, EN_DCDC2, and EN_LDO1 through EN_LDO4. Each rail can be activated or disabled under external microcontroller or FPGA control, enabling precise timing alignment with processor boot requirements and power-state transitions.

What is the thermal management requirement for the TPS65052RSMT in continuous operation?

The TPS65052RSMT uses a 32-pin VQFN package with an exposed thermal pad that must be soldered to a PCB ground plane with ≥6 thermal vias (0.3-mm diameter, spaced ≤1 mm apart). With proper layout, it sustains 125°C junction temperature at 85°C ambient, supported by RθJB = 8°C/W and RθJC(bot) = 2.5°C/W thermal metrics.

Is the TPS65052RSMT still in active production or obsolete?

The TPS65052RSMT is marked as obsolete by Texas Instruments per the SLVS710C datasheet revision history. However, Aetrix Electronics maintains legacy inventory and offers extended supply support, including obsolescence mitigation planning, cross-reference assistance, and last-time-buy coordination for ongoing production programs.