TPS610981 - 3.3V Ultra-Low IQ Boost + LDO | Texas Instruments
料号： TPS610981DSET ✓ 量产中| 数量 | 单价 | 小计 |
|---|---|---|
| 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 |
TPS610981DSET 概述
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.
直接替换替代料： TPS610981DSET ——相同封装，引脚兼容。需要 PCB 改动的不同封装料号已排除。
本系列中的变体
可与以下型号直接替换的同系列型号： TPS610981DSET （相同外形与封装尺寸） ——差异在于 Battery Types Supported, Operating Temperature, Package, Topology.
快速对比工具——选择替代料号进行并排对比：
TPS610982DSET
✅ 直接替换 ⚠️ 规格未核验📋 参考替代料（不在目录中）
TPS610980DSET
✅ 直接替换 ⚠️ 规格未核验📋 参考替代料（不在目录中）
TPS610981DSET 最大额定值与电气特性
| 拓扑 | Synchronous Step-Up (Boost) with Integrated LDO |
| 输出数量 | 2 |
| 输出电压 | 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 |
| 封装 | 6-WSON (1.5 mm x 1.5 mm), DSG |
| 安装类型 | Surface Mount |
| 工作温度 | -40C to +85C |
| Battery Types Supported | 1-cell alkaline/NiCd/NiMH, coin cell, 1-cell Li-Ion/Li-polymer |
| RoHS 状态 | Compliant |
TPS610981DSET 6-wson (1.5 mm x 1.5 mm), dsg 引脚配置指南
TPS610981DSET（6-wson (1.5 mm x 1.5 mm), dsg 封装）的引脚配置。 该功率器件具有栅极、漏极和源极端子。对于无极性封装，请参阅制造商数据手册以了解确切的引脚 1 方向和封装尺寸细节。常见应用包括电源设计、电机驱动和负载开关。
暂无详细引脚数据： TPS610981DSET.
请参阅 数据手册 以查看完整引脚配置。
典型应用
TPS610981DSET 适用于 6 应用s: 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.
推荐
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.
推荐
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.
推荐
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.
推荐
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.
推荐
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.
推荐
推荐产品汇总
工程参考数据： TPS610981DSET ——对比、设计指导和合规信息。
选型指南
与替代料对比
| 参数 | 本产品 | 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 |
关键差异点
- Integrated LDO provides a second regulated rail （对比 TPS610982DSET)
- Ultra-low quiescent current for battery life （对比 TPS61291)
- Low input voltage operation from dying cells （对比 TLV61225)
设计说明
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.
合规信息
RoHS compliant per DigiKey categorization of standard TI WSON product. Other compliance fields not present in provided data.
