TPS610981 - 3.3V Ultra-Low IQ Boost + LDO | Texas Instruments
MPN: TPS610981DSET ✓ NakahandaTPS610981DSET Ulas
A boost converter is a type of switching DC-DC power supply (part of the broader power management IC hierarchy) that steps an input voltage up to a higher regulated output using an inductor, switching FETs, and a control loop. Unlike a linear regulator, a boost converter can multiply battery voltage, making it essential when system electronics need 3.3V but the cell provides only 1.5V or a discharging Li-Ion cell falls below 3.3V. The TPS61098x family additionally integrates a second low-dropout linear regulator or load switch, eliminating an external LDO and board space.
Key features include synchronous rectification for high light-load efficiency, ultra-low quiescent current that extends battery life in always-on systems, integrated output discharge, and power good signaling per TI's product comparison data. The -40C to +85C operating range suits industrial and portable environments.
Technically, the synchronous topology removes the external Schottky diode, improving efficiency and reducing BOM count. The two-rail architecture lets designers power a microcontroller rail and a separate sensor or RF rail from one converter with excellent cross regulation.
Typical applications include battery-powered sensor nodes, energy harvesting systems, portable medical devices, and low-power IoT endpoints where every microamp of standby current matters.
Design consideration: because the input can be driven below 0.7V by a deeply discharged cell, verify minimum input and inrush behavior, and follow TI datasheet (Rev. F) layout guidance for short inductor and output capacitor traces to ensure loop stability.
Mga alternatibo na pwedeng ilagay na TPS610981DSET — parehas na package, pin-to-pin na katugmang. Hindi kasama ang mga bahagi ng iba't-ibang package na nangangailangan ng pagpapaayos ng PCB.
Variante sa Seri na ito
Katulad na modelo sa serye na katugma sa pagpasok TPS610981DSET (parehas na form factor at footprint) — pagkakaiba sa Battery Types Supported, Operating Temperature, Package, Topology.
TPS610982DSET
✅ Drop-In ⚠️ Mga Talaan Hindi Naiwerikmo📋 Alternatibo na Reference (hindi sa katalogo)
TPS610980DSET
✅ Drop-In ⚠️ Mga Talaan Hindi Naiwerikmo📋 Alternatibo na Reference (hindi sa katalogo)
TPS610981DSET Mga Pinakamataas na Rating at Electrical Characteristics
| Topolohiya | Synchronous Step-Up (Boost) with Integrated LDO |
| Bilang ng Outputs | 2 |
| Output Volte | 3.3 V (fixed) |
| Minimum Input Voltage | Low input voltage operation (per TI product page) |
| Switching Topology | Synchronous rectification |
| Light-Load Efficiency | Optimized light-load efficiency feature |
| Output Discharge | Yes |
| Power Good | Yes |
| Packhaging | 6-WSON (1.5 mm x 1.5 mm), DSG |
| Uri ng Pagpapasok | Surface Mount |
| Temperature na Operasyon | -40C to +85C |
| Battery Types Supported | 1-cell alkaline/NiCd/NiMH, coin cell, 1-cell Li-Ion/Li-polymer |
| Tindminan RoHS | Compliant |
Gabay sa Pin Configuration ng TPS610981DSET 6-wson (1.5 mm x 1.5 mm), dsg
Pin configuration para sa TPS610981DSET (6-wson (1.5 mm x 1.5 mm), dsg package). Ang power device na ito ay may gate, drain, at source terminals. Para sa mga non-polarized package, sumangguni sa datasheet ng manufacturer para sa eksaktong oryentasyon ng pin 1 at mga detalye ng footprint. Kasama sa mga karaniwang aplikasyon ang disenyo ng power supply, motor driving, at load switching.
Wala ng detalyadong pinout data na magagamit para sa TPS610981DSET.
Sumangguni sa datasheet para sa buong pin configuration.
Tipikal na mga Gamit
TPS610981DSET ay nararapat para sa 6 aplikasyons: Battery-Powered IoT Sensor Nodes, Energy Harvesting Power Supplies, Portable Medical and Wearable Devices, Single-Cell Alkaline/NiMH Battery Systems, Low-Power Industrial Sensing and Metering, Backup / Hold-Up Power Rails.
Battery-Powered IoT Sensor Nodes
The TPS610981 fits IoT endpoint designs where a coin cell or single alkaline cell must power a 3.3V MCU and radio. Its ultra-low quiescent current keeps standby drain negligible during sleep intervals, while synchronous rectification maximizes light-load efficiency during intermittent transmit bursts. The integrated LDO provides a second clean rail for a sensitive RF or sensor load without an extra IC. Placed after the cell with a small boost inductor, it sustains regulation as the cell discharges below 3.3V, extending usable battery capacity and system lifetime in BLE beacons and smart-home sensors.
Inirekomenda
Energy Harvesting Power Supplies
In energy harvesting systems using small photovoltaic cells or thermoelectric generators, source voltage can fall well below the required rail. The TPS610981's low input voltage operation boosts these weak sources to a stable 3.3V, and its ultra-low quiescent current ensures harvested energy is not wasted in the converter itself. The power good output lets the system gate loads until the storage capacitor charges sufficiently, while output discharge safely resets the rail. This makes it well suited for indoor BLE asset tags and intermittent-duty environmental monitors running from harvested milliwatts.
Inirekomenda
Portable Medical and Wearable Devices
Wearable health patches and portable diagnostics need tiny, efficient power conversion with long battery life. The TPS610981's 1.5x1.5 mm 6-WSON package minimizes PCB area in body-worn form factors, and its two-rail architecture (boost plus integrated LDO) separates noisy digital rails from sensitive analog front-end supplies for biosensing amplifiers. Ultra-low quiescent current extends multi-week battery runtimes, and the -40C to +85C range covers sterilization and transport conditions. Fixed 3.3V output simplifies BOM management across product variants sharing one power design.
Inirekomenda
Single-Cell Alkaline/NiMH Battery Systems
Products running from one or two alkaline, NiCd, or NiMH cells need boost conversion as cell voltage sags from 1.5V toward 0.9V per cell. The TPS610981 is explicitly characterized by TI for these chemistries, with low input voltage operation maintaining 3.3V regulation deep into discharge. Synchronous rectification avoids the efficiency loss of a Schottky diode, and light-load optimization keeps idle current low between user interactions in remote controls, toys, and meters. The integrated LDO powers a secondary peripheral rail, replacing a separate linear regulator IC and saving board space.
Inirekomenda
Low-Power Industrial Sensing and Metering
Industrial battery-powered meters and sensor transmitters must operate for years without maintenance. The TPS610981's ultra-low quiescent current and power good supervision let designers implement duty-cycled acquisition: the MCU sleeps with rails discharged, wakes on an RTC or sensor interrupt, and only boosts when measurement is needed. Output discharge prevents residual rail leakage into sensors during sleep. The -40C to +85C range supports outdoor enclosures, and the compact WSON package suits dense transmitter PCBs with captive lithium or alkaline cells in utility submetering applications.
Inirekomenda
Backup / Hold-Up Power Rails
When a main system supply fails or a Li-Ion cell discharges below the logic rail, the TPS610981 can act as a backup boost path, drawing from the low cell voltage to hold a 3.3V rail alive for data logging or safe shutdown. Its low input voltage operation is essential near end-of-discharge, and the ultra-low quiescent current prevents needless drain of the reserve cell while standing by. The power good flag informs the host to enter shutdown sequences. This topology suits tamper logs, RTC keep-alive, and graceful-write protection in compact devices.
Inirekomenda
Buod ng mga Inirekomendang Produkto
Impormasyon ng Talumpati sa Engineering for TPS610981DSET — ikabit, gabay sa disenyo, at impormasyon ng pagsunod sa kautusan.
Paunawang Hanapin
Ikabit sa Mga Alternatibo
| Parametro | Ito ang Producto | TPS610982DSET | TPS610980DSET |
|---|---|---|---|
| Package | 6-WSON (1.5x1.5 mm) | 6-WSON (1.5x1.5 mm) - same | 6-WSON (1.5x1.5 mm) - same |
| Brand | Texas Instruments | Texas Instruments | Texas Instruments |
| Second Rail Function | Integrated LDO | Integrated load switch | Integrated LDO |
| Quiescent Current | Ultra-low | Ultra-low (same family) | Ultra-low (same family) |
| Operating Temperature | -40C to +85C | -40C to +85C | -40C to +85C |
| Synchronous Rectification | Yes | Yes | Yes |
| Power Good / Output Discharge | Yes / Yes | Yes / Yes | Yes / Yes |
Pangunahing mga Pagkakaiba
- Integrated LDO provides a second regulated rail (kumpara saTPS610982DSET)
- Ultra-low quiescent current for battery life (kumpara saTPS61291)
- Low input voltage operation from dying cells (kumpara saTLV61225)
Talaan ng Disenyo
Follow TI TPS61098x datasheet (Rev. F) layout guidance: place the boost inductor and input/output capacitors as close as possible to the SW and VIN pins to minimize loop area. The 1.5x1.5 mm WSON requires short, wide traces; use the exposed die-pad (if present in the footprint) soldered to a grounded copper pour for thermal and ground integrity. Keep the LDO output capacitor adjacent to its pin for stability.
Verify input source impedance: coin cells and small alkaline cells have high internal resistance, and boost input pulsed current can cause voltage dips that trip the converter below its minimum operating voltage. Add a local bulk capacitor (10 uF-class, per datasheet) at VIN, and validate startup behavior at end-of-discharge cell voltage in your worst-case load scenario.
Do not confuse TPS610981 (integrated LDO) with TPS610982 (integrated load switch) - the second rail behaves differently and they are not functionally interchangeable without schematic review. Also note TI's own comparison lists TPS61291, TPS61299, and TLV61225 as different pinout devices; they cannot be swapped onto a TPS610981 footprint.
Impormasyon ng Pagsunod sa Kautusan
RoHS compliant per DigiKey categorization of standard TI WSON product. Other compliance fields not present in provided data.
