Texas Instruments TPS62732DRYR

Overview

TPS62732DRYR from Texas Instruments is a synchronous step-down DC-DC converter with integrated ultra-low-power bypass switch, designed for battery-powered Bluetooth Low Energy SoCs. It delivers fixed 1.9 V output, supports 1.9–3.9 V input, achieves ≤30 nA bypass-mode current, and enables automatic DC-DC-to-bypass transition at VIN = 2.05 V (falling) for zero-ripple operation in CC2540-based wearable sensors.

For engineers reviewing the TPS62732DRYR datasheet, TPS62732DRYR pinout, TPS62732DRYR application, or TPS62732DRYR equivalent, this page provides verified electrical parameters, USON-6 package layout, bypass-mode timing behavior, DCS-Control™ transient response characteristics, and validated alternatives for low-power wireless power management.

Technical Context

The TPS62732DRYR implements TI's DCS-Control™ topology-combining hysteretic speed with voltage-mode accuracy-to sustain up to 3 MHz switching frequency while maintaining <1% output voltage ripple across 0–100 mA load. Its dual-mode architecture integrates a synchronous buck stage (2.1 Ω high-side/350 mΩ low-side MOSFETs) and a dedicated 2.9 Ω bypass switch that activates automatically when VIN drops within 100 mV of VOUT.

Operation is governed by ON/BYP pin control: logic-high enables regulated DC-DC mode with 25 μA quiescent current; logic-low forces 30-nA bypass mode with direct VIN-to-VOUT connection. The STAT open-drain output signals regulation readiness via 95% VOUT threshold detection, with internal feedback divider disconnection during bypass to eliminate leakage paths.

Key Specifications

Pinout & Package

TPS62732DRYR uses a 1.45 mm × 1.00 mm × 0.6 mm USON-6 (DRY) package with wettable flank terminations for automated optical inspection. Thermal resistance θ_JA = 293.8°C/W reflects optimized PCB pad exposure under the exposed die pad.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS62732DRYR, TPS62730DRYR provides tighter bypass threshold matching for 2.1 V systems but sacrifices 200 mV earlier transition onset, while TPS62733DRYR trades lower dropout for reduced bypass efficiency-making TPS62732DRYR optimal for 1.9 V CC2540 nodes prioritizing minimal sleep current and precise low-VIN transition.

Availability

TPS62732DRYR is available at Aetrix Electronics and suitable for wearable BLE sensor nodes, smart meter RF modules, implantable medical beacons, asset tracking tags, and industrial telemetry endpoints requiring stable component supply across multi-year production cycles.

Supply support for TPS62732DRYR 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 and embedded processing technologies, with leadership in low-power design and precision power management ICs.

The TPS6273x product line was engineered specifically for ultra-low-power wireless SoCs-including CC2540 and CC430-delivering integrated DC-DC conversion and bypass functionality in sub-2 mm² packages to extend battery life in energy-constrained IoT endpoints.

FAQ

What is the fixed output voltage of the TPS62732DRYR?

The TPS62732DRYR provides a factory-trimmed fixed output voltage of 1.9 V. This value is internally set and does not require external resistive feedback. It is specifically aligned with the core supply requirement of TI's CC2540 Bluetooth Low Energy SoC, ensuring compatibility without design iteration. The 1.9 V output remains stable across load currents from 0 to 100 mA and input voltages from 1.9 V to 3.9 V, as verified in the SLVSAC3D datasheet Section 8.5.

How does the TPS62732DRYR transition between DC-DC and bypass modes?

The TPS62732DRYR transitions automatically based on input voltage thresholds: it enters bypass mode when VIN falls to 2.05 V (falling edge) and exits bypass when VIN rises to 2.10 V (rising edge). This 50 mV hysteresis prevents oscillation near the threshold. During transition, the internal bypass switch engages before the DC-DC stage shuts down, ensuring uninterrupted VOUT. The TPS62732DRYR also supports forced bypass via logic-low assertion on the ON/BYP pin, independent of VIN level.

What is the maximum output current capability of the TPS62732DRYR?

The TPS62732DRYR supports up to 100 mA of continuous output current in DC-DC mode, as confirmed by its forward current limit of 410 mA per MOSFET and thermal derating curves in the SLVSAC3D datasheet. In bypass mode, current is limited only by the 2.9 Ω (typ.) bypass switch R_DS(ON), supporting ~650 mA peak before exceeding 2 W junction temperature rise-but practical use is constrained by application load, typically ≤20 mA for BLE SoCs. The 100 mA rating assumes 2.2 μH inductor and 2.2 μF output capacitor at TA = 85°C.

Can the TPS62732DRYR be used with a 2.2 μH inductor and 2.2 μF capacitor?

Yes-the TPS62732DRYR is explicitly optimized for 2.2 μH inductors and 2.2 μF ceramic output capacitors, as documented in Section 10.2.1 of the SLVSAC3D datasheet. This combination yields an LC corner frequency of ~72 kHz, which aligns with the internal DCS-Control™ compensation for stable regulation and minimal output ripple (<10 mV_PP) across 0–100 mA loads. Murata GRM155R60J225 and FDK MIPSZ2012 are validated part numbers for COUT and L respectively.

What is the purpose of the STAT pin on the TPS62732DRYR?

The STAT pin on the TPS62732DRYR is an open-drain status output that signals when the regulated 1.9 V output has settled within 95% of nominal (1.805 V) during falling VIN conditions or 98% (1.862 V) during rising VIN. It is active-low and requires an external pull-up resistor. When ON/BYP is low (bypass mode), STAT goes high-impedance. This pin enables host microcontrollers to synchronize wake-up sequences with power rail stability-critical for reliable BLE radio initialization in systems using the TPS62732DRYR.