Texas Instruments TPS610982DSER

Overview

TPS610982DSER from Texas Instruments is an ultra-low quiescent current synchronous boost converter with integrated LDO, designed for single-cell battery-powered systems. It delivers dual regulated outputs (VMAIN = 3.3 V, VSUB = 2.8 V) across 0.7–4.5 V input, supports automatic pass-through mode, and achieves 4 µA active-mode and 4–10 µA low-power-mode quiescent current into VMAIN - enabling multi-year operation in BLE tags and wearable sensors.

For engineers reviewing the TPS610982DSER datasheet, TPS610982DSER pinout, TPS610982DSER application, or TPS610982DSER equivalent, key selection criteria include its dual-rail output behavior under MODE control, 350 mA peak switch current limit, 1.5 mm × 1.5 mm WSON-6 package, and verified 3.3 V/2.8 V fixed-output configuration - critical for coin-cell and alkaline-powered ultra-low-power subsystems.

Technical Context

The TPS610982DSER implements a hysteretic synchronous boost topology with integrated LDO, enabling high efficiency at microamp loads. Its MODE pin selects between Active mode (both VMAIN and VSUB enabled) and Low Power mode (VMAIN remains active while VSUB is disabled), with no external components required for mode transition.

Automatic pass-through activates when VIN exceeds 3.35 V (hysteresis = 0.1 V), bypassing switching to reduce losses; below threshold, it regulates VMAIN to 3.3 V using a 4.7 µH inductor and internal 350–650 mΩ power switches. The LDO maintains 2.8 V output with 60–100 mV dropout at 50 mA and 28 dB PSRR at 1 kHz in Low Power mode.

Key Specifications

Pinout & Package

TPS610982DSER is housed in a 1.5 mm × 1.5 mm, 6-pin WSON package with wettable flanks, optimized for space-constrained PCB layouts and automated optical inspection.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar dual-output boost-LDO applications.

Compared with TPS610981DSER and TPS610986DSER, the TPS610982DSER uniquely provides a fixed 2.8 V LDO output with no discharge path - making it the only option for precision analog sensor biasing in ultra-low-power systems where voltage accuracy and absence of VSUB leakage paths are critical.

Availability

TPS610982DSER is available at Aetrix Electronics and suitable for BLE sensor nodes, medical wearables, smart remote controls, and industrial wireless sensors requiring stable component supply with guaranteed long-term availability.

Supply support for TPS610982DSER 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 and embedded processing technologies, with decades of expertise in power management IC design for ultra-low-power applications.

The TPS61098x family was engineered specifically for energy-harvesting and primary-battery systems demanding nanowatt-level quiescent operation, dual-rail flexibility, and minimal external component count - targeting wearables, IoT edge nodes, and disposable medical devices.

FAQ

What is the exact VSUB output voltage of the TPS610982DSER and how tightly is it regulated?

The TPS610982DSER delivers a fixed 2.8 V output on the VSUB pin in both Active and Low Power modes, with a typical tolerance of ±2% (2.744 V to 2.856 V) across temperature and load. This regulation is achieved via an integrated LDO with 60–100 mV dropout at 50 mA, ensuring stable bias for analog sensors without external feedback components - a key differentiator from load-switch variants like TPS610985DSER.

Can the TPS610982DSER operate from a fully depleted coin cell, and what is its minimum start-up voltage?

Yes, the TPS610982DSER starts up reliably at 0.7 V input voltage with ≥3 kΩ load, enabling full functionality down to the end-of-life voltage of standard CR2032 coin cells (typically ~0.9 V open-circuit, ~0.7 V under load). This capability is confirmed in Section 7.5 of the datasheet and allows designs to extract maximum energy from primary batteries - extending operational lifetime beyond alternatives requiring ≥0.9 V start-up.

How does the MODE pin affect VSUB behavior in the TPS610982DSER, and what happens if it's left floating?

In the TPS610982DSER, the MODE pin directly controls VSUB: logic high enables the 2.8 V LDO output, while logic low disables it completely (VSUB = high-impedance, no discharge path). The pin must be actively driven - leaving it floating violates Absolute Maximum Ratings and may cause erratic operation or excessive current draw, as stated in Table 6-1. A pull-down resistor to GND is recommended for Low Power default behavior.

What is the pass-through threshold voltage for the TPS610982DSER, and how does hysteresis prevent oscillation?

The TPS610982DSER enters pass-through mode when VIN rises above 3.35 V and exits when VIN falls below 3.25 V, providing 0.1 V hysteresis. This prevents chattering between boost and pass-through states during input voltage fluctuations - such as those caused by battery recovery after pulse loads - ensuring stable VMAIN output without audible switching noise or efficiency degradation.

Is the TPS610982DSER RoHS-compliant and qualified for industrial temperature range?

Yes, the TPS610982DSER is RoHS-compliant and rated for operation across –40°C to +125°C junction temperature, with full electrical specifications guaranteed from –40°C to +85°C ambient. Its WSON-6 package meets JEDEC moisture sensitivity level 2a, and the device is qualified per TI's automotive-grade reliability standards - making it suitable for industrial, medical, and extended-temperature consumer applications.