Texas Instruments TPS65053RGER

Overview

TPS65053 from Texas Instruments is a 5-channel power management IC integrating two synchronous step-down converters (DCDC1: 1 A, DCDC2: 600 mA) and three low-dropout regulators (VLDO1: 400 mA, VLDO2/VLDO3: 200 mA each), designed for single-cell Li-Ion/Li-Polymer powered systems such as OMAP™-based handhelds and portable media players. It operates from 2.5 V to 6 V input, delivers ±1% output voltage accuracy in PWM mode, and features 2.25-MHz fixed-frequency switching with 180° out-of-phase operation to reduce input ripple.

For engineers reviewing the TPS65053 datasheet, TPS65053 pinout, TPS65053 application, or TPS65053 equivalent, key selection criteria include its dual adjustable DC-DC topology, integrated LDO sequencing capability via independent enable pins, thermal shutdown at 150°C, 32-μA typical quiescent current in PFM mode, and VQFN-24 package compatibility with space-constrained portable designs.

Technical Context

The TPS65053 uses voltage-mode control with input-voltage feed-forward for fast line/load regulation and supports both Power Save Mode (PFM at light load) and forced PWM mode via the MODE pin. Its two DC-DC converters operate synchronously with 180° phase shift to minimize RMS input current and allow smaller input capacitors.

Each converter employs internal P-channel high-side (r_DS(on) = 280–630 mΩ) and N-channel low-side (r_DS(on) = 220–450 mΩ) MOSFETs, with forward current limit of 1.19–1.65 A for DCDC1 and 0.85–1.15 A for DCDC2. LDOs feature internal discharge resistors (350 Ω) and 25-μs load regulation time.

Key Specifications

Pinout & Package

VQFN-24 package (4.00 mm × 4.00 mm, 0.5-mm pitch) with exposed thermal pad (PowerPAD™) requiring solder connection to PCB ground plane for thermal performance.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS650531 and TPS65058, the TPS65053 provides fully adjustable DC-DC outputs and flexible LDO configuration ideal for custom voltage rails, while maintaining identical pinout and package-enabling layout reuse where 600-mA core current and 1.3-V LDO3 meet system requirements.

Availability

TPS65053 is available at Aetrix Electronics and suitable for smartphone power management, portable media player systems, and GPS/WLAN module designs requiring stable component supply across extended production cycles.

Supply support for TPS65053 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 delivering analog and embedded processing solutions for industrial, automotive, and personal electronics markets.

The TPS6505xx product line was engineered specifically for battery-powered portable devices needing highly integrated, efficient, and sequenced multi-rail power delivery from a single Li-Ion cell.

FAQ

What is the maximum supported input voltage for TPS65053 DC-DC converters?

The TPS65053 DC-DC converters accept an input voltage range of 2.5 V to 6 V on the VINDCDC1/2 pin. This allows direct connection to single-cell Li-Ion (up to 4.2 V) or Li-Polymer batteries, and accommodates higher-voltage sources such as USB PD or boosted supplies up to 6 V. Exceeding 6 V violates absolute maximum ratings and may cause permanent damage to the TPS65053.

Can TPS65053 VLDO3 output voltage be adjusted externally?

No, the TPS65053 VLDO3 output is factory-fixed at 1.3 V and does not support external adjustment. Unlike VLDO1 and VLDO2-which use FB_LDO1/FB_LDO2 pins for resistor-divider programming-VLDO3 has no feedback terminal and operates as a dedicated 1.3-V, 200-mA low-dropout regulator. This fixed value is confirmed in the datasheet's Recommended Operating Conditions table for TPS65053.

Does TPS65053 support independent power sequencing of its regulators?

Yes, the TPS65053 provides full independent enable control: EN_DCDC1, EN_DCDC2, EN_LDO1, EN_LDO2, and EN_LDO3 are all separate active-high digital inputs. This allows precise timing control-for example, asserting EN_DCDC2 before EN_DCDC1 to power the processor core prior to I/O, or enabling VLDO1 only after DCDC1 reaches regulation. Each enable pin has defined VIH/VIL thresholds (1.2 V/0.4 V) compatible with standard GPIOs.

What thermal management provisions does TPS65053 include?

The TPS65053 integrates thermal shutdown that triggers at 150°C junction temperature, with 20°C hysteresis to prevent oscillation. Its VQFN-24 package features an exposed PowerPAD™ requiring solder connection to a thermal pad on the PCB for effective heat dissipation. The datasheet specifies R_θJA = 31.4°C/W and R_θJB = 8.2°C/W, confirming board-level conduction as the primary thermal path. No external thermal sensor or monitoring circuitry is needed-the TPS65053 handles protection autonomously.

How does TPS65053 handle light-load efficiency optimization?

The TPS65053 automatically enters Power Save Mode (PFM) at light loads, reducing quiescent current to 32 μA typical for both DC-DC converters. This mode dynamically adjusts switching frequency to maintain regulation while minimizing gate drive and switching losses. When higher output current is demanded, it seamlessly transitions back to fixed 2.25-MHz PWM operation. The MODE pin allows forced PWM operation if deterministic frequency is required for EMI compliance-ensuring the TPS65053 adapts to both battery-life-critical and noise-sensitive use cases.