TPS610981 - 3.3V Ultra-Low IQ Boost + LDO | Texas Instruments
MPN: TPS610981DSET β Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $1.35 | $1.35 |
| 10 | $1.1 | $11.00 |
| 100 | $0.85 | $85.00 |
| 500 | $0.68 | $340.00 |
| 1,000 | $0.55 | $550.00 |
Drop-in alternatives for TPS610981DSET β same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Quick Comparison Tool β Select alternative parts for side-by-side comparison:
TPS610982DSET
β Drop-Inπ Reference alternative (not in catalog)
TPS610980DSET
β Drop-Inπ Reference alternative (not in catalog)
TPS610981DSET Maximum Ratings & Electrical Characteristics
| Topology | Synchronous Step-Up (Boost) with Integrated LDO |
| Number of Outputs | 2 |
| Output Voltage | 3.3 V (fixed) |
| Input Voltage Range | [DATA_NEEDED: exact min/max VIN per datasheet Rev. F] |
| Minimum Input Voltage | Low input voltage operation (per TI product page) |
| Switching Topology | Synchronous rectification |
| Quiescent Current | Ultra-low (value in [DATA_NEEDED: Iq typ uA]) |
| Output Current | [DATA_NEEDED: max output current] |
| Light-Load Efficiency | Optimized light-load efficiency feature |
| Output Discharge | Yes |
| Power Good | Yes |
| Package | 6-WSON (1.5 mm x 1.5 mm), DSG |
| Mounting Type | Surface Mount |
| Operating Temperature | -40C to +85C |
| Battery Types Supported | 1-cell alkaline/NiCd/NiMH, coin cell, 1-cell Li-Ion/Li-polymer |
| RoHS Status | Compliant |
TPS610981DSET 6-wson (1.5 mm x 1.5 mm), dsg Pin Configuration Guide
Complete pinout information for TPS610981DSET (6-wson (1.5 mm x 1.5 mm), dsg package). This power device features gate, drain, and source terminals. For non-polarized packages, refer to the manufacturer datasheet for exact pin 1 orientation and footprint details. Common applications include power supply design, motor driving, and load switching.
No detailed pinout data available for TPS610981DSET.
Refer to the datasheet for full pin configuration.
Safe Operating Area (SOA) & Thermal Characteristics
No official SOA curve available for this component. Always operate within absolute maximum ratings specified in the datasheet. Ensure adequate cooling and derate as needed.
Typical Applications
TPS610981DSET is suitable for 6 applications: 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.
Recommended
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.
Recommended
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.
Recommended
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.
Recommended
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.
Recommended
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.
Recommended
Recommended Products Summary
Engineering reference data for TPS610981DSET β comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | 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 |
| Boost Output Voltage | 3.3 V fixed | 3.3 V fixed | [DATA_NEEDED] (different fixed option) |
| 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 |
Key Differentiators
- Integrated LDO provides a second regulated rail (vs TPS610982DSET)
- Ultra-low quiescent current for battery life (vs TPS61291)
- Low input voltage operation from dying cells (vs TLV61225)
Design Notes
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.
Compliance Information
RoHS compliant per DigiKey categorization of standard TI WSON product. Other compliance fields not present in provided data.
