Texas Instruments TPS610987DSER

Overview

TPS610987DSER from Texas Instruments is an ultra-low quiescent current synchronous boost converter with integrated LDO, designed for single-cell battery-powered systems. It delivers 4.3 V main output and 3.1 V LDO output, operates from 0.7 V input, supports automatic pass-through, and consumes only 300 nA in low-power mode-enabling multi-year operation in BLE tags and wearable sensors.

For engineers reviewing the TPS610987DSER datasheet, TPS610987DSER pinout, TPS610987DSER application, or TPS610987DSER equivalent, key selection criteria include its dual-rail architecture (VMAIN + VSUB), MODE-controlled active/low-power states, 300-nA IQ at VMAIN, 2.2 V low-power VMAIN setting, and integrated discharge path for VSUB during sleep-critical for energy-constrained IoT endpoints.

Technical Context

The TPS610987DSER implements a hysteretic synchronous boost controller with automatic pass-through: when VIN exceeds 2.25 V (low-power mode) or 4.4 V (active mode), it disables switching and routes input directly to VMAIN. Its dual-output architecture separates system-level power (VMAIN) from peripheral supply (VSUB), with independent enable control via the MODE pin.

In low-power mode, the LDO is disabled and VSUB is actively discharged at 5–8 mA, while the boost remains active at 2.2 V output. The device uses internal MOSFETs with R_DS(on) of 300–1000 mΩ (HS/LS), supports 4.7 µH inductors, and achieves 88% efficiency at 10 µA load-optimized for intermittent wake-up duty cycles in coin-cell applications.

Key Specifications

Pinout & Package

TPS610987DSER is housed in a 1.5-mm × 1.5-mm, 6-pin WSON package with wettable flanks, optimized for space-constrained wearables and medical patches.

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 TPS610987DSER uniquely provides 4.3 V active-mode VMAIN and 2.2 V low-power VMAIN-enabling higher-performance active operation while maximizing sleep efficiency through voltage scaling.

Availability

TPS610987DSER is available at Aetrix Electronics and suitable for smart remote control, BLE tag, wearable health sensor, single-cell alkaline medical device, and portable consumer electronics requiring stable component supply across extended temperature ranges and long product lifecycles.

Supply support for TPS610987DSER 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 TPS61098x family is engineered for ultra-low-power battery-operated devices, integrating boost conversion, LDO regulation, and intelligent power-state control to eliminate external discrete components and extend runtime in coin-cell and single-cell applications.

FAQ

What is the minimum input voltage required for TPS610987DSER to start up?

The TPS610987DSER starts up into load at 0.7 V input voltage with a load resistance ≥3 kΩ. This enables reliable operation from deeply discharged alkaline, NiMH, or lithium coin cells, making it ideal for applications where maximum battery utilization is critical-such as long-life BLE sensors or medical patches where battery replacement is impractical. The TPS610987DSER maintains regulation down to this threshold without external assist circuitry.

How does the MODE pin control power states in TPS610987DSER?

The MODE pin on the TPS610987DSER selects between two distinct power states: when pulled high (≥1.2 V), it enables Active mode with VMAIN = 4.3 V and VSUB = 3.1 V; when pulled low (≤0.4 V), it enters Low Power mode with VMAIN = 2.2 V and VSUB disabled with active discharge. The pin must be actively driven-floating is prohibited. This dual-state control allows system-level firmware to dynamically scale power delivery, reducing total system IQ to sub-µA levels during extended sleep periods in the TPS610987DSER.

Does TPS610987DSER support automatic pass-through, and under what conditions?

Yes, the TPS610987DSER supports automatic pass-through: in Active mode, it engages when VIN rises above 4.4 V (with 0.1 V hysteresis); in Low Power mode, it engages when VIN rises above 2.25 V. During pass-through, the boost converter stops switching and connects VIN directly to VMAIN, eliminating switching losses and improving light-load efficiency. This behavior is intrinsic to the TPS610987DSER's control architecture and requires no external configuration-enhancing battery longevity across the full discharge curve.

What is the purpose of VSUB active discharge in TPS610987DSER, and how much current does it provide?

The VSUB active discharge in the TPS610987DSER sinks 5–8 mA from the VSUB pin to GND when MODE = low, ensuring rapid discharge of peripheral capacitance after power-down. This prevents unintended wake-up events caused by residual charge on sensor or transceiver inputs, improves system reliability in low-power states, and eliminates need for external discharge resistors. The feature is integral to the TPS610987DSER's LDO implementation and operates automatically without host intervention.

What package type and thermal characteristics apply to TPS610987DSER?

The TPS610987DSER uses a 6-pin WSON package measuring 1.5 mm × 1.5 mm with wettable flanks, supporting automated optical inspection. Its junction-to-ambient thermal resistance (R_θJA) is 207.3°C/W, junction-to-board (R_θJB) is 136.4°C/W, and maximum operating junction temperature is 125°C. These values assume standard JEDEC 2-layer board layout per datasheet guidelines-no heatsink or thermal pad is required for typical 50-mA continuous loads, making the TPS610987DSER suitable for ultra-thin wearable form factors.