TPS610981 - 3.3V Ultra-Low Iq Boost + LDO | Texas Instruments
MPN: TPS610981DSER ✓ نشطTPS610981DSER نظرة عامة
A boost converter is a DC-DC step-up topology within the broader voltage regulator family of power management ICs. It raises a lower input voltage to a higher regulated output using an inductor and synchronous switching elements. The TPS61098x family integrates this boost converter with either an LDO or a load switch, providing two output rails from one IC - a key differentiator for space-constrained battery designs.
Key features include ultra-low quiescent current of typically 300 nA, extending battery life in standby for years-long deployments. The synchronous boost delivers up to 300 mA at 3.3V from a 1.8V input with efficiency up to 95%, while the integrated LDO supplies a clean, low-noise rail for analog or RF circuitry. True load disconnect during shutdown prevents battery drain, and integrated overcurrent and overtemperature protection ensure robust operation.
Architecturally, the device uses pulse-frequency modulation (PFM) at light loads to minimize quiescent current, transitioning to PWM at heavier loads for low ripple and stable regulation. The LDO is powered from the boost output, generating a second rail with no additional magnetics. Typical applications include wireless sensor nodes, hearing aids, portable medical devices, and IoT endpoints where the 3.3V rail powers microcontrollers and RF transceivers while the LDO rail feeds analog sensors or audio codecs.
For design, select the recommended 2.2 uH inductor and place input/output capacitors close to the pins to minimize ripple and preserve the ultra-low standby current advantage.
بدائل مباشرة لـ TPS610981DSER — نفس الحزمة، متوافق دبوس بدبوس. تُستثنى القطع ذات الحزم المختلفة التي تتطلب تعديل PCB.
الطرازات في هذه السلسلة
طرازات من نفس السلسلة متوافقة تمامًا مع TPS610981DSER (نفس عامل الشكل والبصمة) — يختلف في Battery Types Supported, Operating Temperature, Package, Topology.
TPS610980DSER
✅ بديل مباشر ⚠️ مواصفات غير مُتحقق منها📋 بديل مرجعي (غير موجود في الكتالوج)
TPS610981DSET
✅ بديل مباشرتواصل لمعرفة السعر
عرض ورقة البيانات ←TPS610982DSER
✅ بديل مباشر ⚠️ مواصفات غير مُتحقق منها📋 بديل مرجعي (غير موجود في الكتالوج)
TPS61291DSER
⚡ نفس الحزمة📋 بديل مرجعي (غير موجود في الكتالوج)
TPS61299DSER
⚡ نفس الحزمة📋 بديل مرجعي (غير موجود في الكتالوج)
TLV61225DSER
⚡ نفس الحزمة📋 بديل مرجعي (غير موجود في الكتالوج)
TPS610981DSER الحدود القصوى والخصائص الكهربائية
| البنية الطوبولوجية | Synchronous Boost with Integrated LDO |
| عدد المخارج | 2 |
| Output Voltage (Boost) | 3.3 V (fixed) |
| Output Voltage (LDO) | Regulated, powered from boost output |
| تيار السكون | 300 nA (typical) |
| Peak Efficiency | up to 95% |
| Battery Types Supported | 1-2 cell alkaline/NiCd/NiMH, 1-cell coin cell, 1-cell Li-Ion/Li-polymer |
| Control Scheme | PFM at light load, PWM at heavy load |
| Load Disconnect | Yes (true disconnect during shutdown) |
| Protection | Overcurrent, overtemperature |
| درجة حرارة التشغيل | -40C to 85C |
| العلبة | 6-WSON (1.5x1.5 mm) [DSG] |
| نوع التركيب | Surface Mount |
| Recommended Inductor | 2.2 uH (typical) |
| حالة RoHS | Compliant |
تكوين أطراف TPS610981DSER
| دبوس 1 | SW — Boost converter switch node - connect to inductor |
| دبوس 2 | GND — Ground |
| دبوس 3 | VOUT — Boost regulated output (3.3 V) |
| دبوس 4 | LDO — Integrated LDO regulated output |
| دبوس 5 | EN — Enable control input |
| دبوس 6 | VIN — Battery input supply |
التطبيقات النموذجية
TPS610981DSER مناسب لـ 6 التطبيقs: Wireless IoT Sensor Nodes, Hearing Aids and Wearables, Portable Medical Devices, Single-Cell Li-Ion Battery Systems, Energy Harvesting and Remote Monitoring, Portable Audio Devices.
Wireless IoT Sensor Nodes
Battery-powered IoT nodes spend most of their life in sleep, making the TPS610981's 300 nA quiescent current decisive for multi-year operation from a single coin cell or alkaline cell. The synchronous boost raises the decaying cell voltage to a stable 3.3V rail for the MCU and radio, while the integrated LDO supplies a low-noise rail for the RF transceiver or analog front end, all in a 1.5x1.5mm footprint that fits coin-cell-sized PCBs.
موصى به
Hearing Aids and Wearables
Hearing aids and wearables demand extreme miniaturization and long battery life; the TPS610981 addresses both with its 6-WSON 1.5x1.5mm package and 300 nA standby current. Running from a single zinc-air or Li-Ion cell, the boost delivers 3.3V for the audio DSP while the integrated LDO powers low-noise analog sections such as microphone bias or codec supplies, eliminating a second regulator IC and saving board area and cost.
موصى به
Portable Medical Devices
Portable medical monitors and diagnostic devices require clean, stable rails for analog measurement circuits even as the battery discharges. The TPS610981's boost stage maintains a firm 3.3V rail for the MCU and display, while the integrated LDO provides a low-ripple supply for sensors and signal conditioning. True load disconnect prevents battery drain in storage, and integrated overcurrent and overtemperature protection support robust, safe operation in patient-adjacent products.
موصى به
Single-Cell Li-Ion Battery Systems
A single Li-Ion cell swings from 4.2V down toward 3V or lower, yet many 3.3V peripherals need regulation across this whole range. The TPS610981's low-input synchronous boost continues delivering a solid 3.3V rail as the cell discharges, with up to 95% efficiency at load. The integrated LDO adds a second regulated rail for analog circuitry, and the 300 nA quiescent draw minimizes standby losses between charging cycles in portable products.
موصى به
Energy Harvesting and Remote Monitoring
Remote monitoring endpoints powered by small primary cells or harvested energy benefit from the TPS610981's ability to start and regulate from very low input voltages. The PFM control scheme keeps conversion losses negligible at microamp average loads, so a small cell can sustain a radio-plus-sensor node for years. The 3.3V boost rail runs the MCU and RF link, while the LDO rail powers the analog sensor, all within a footprint small enough for compact remote units.
موصى به
Portable Audio Devices
In compact audio products such as recorders and portable codecs, power-supply noise directly affects the audio signal path. The TPS610981's integrated LDO filters the boost output, providing a low-noise rail for the audio codec or microphone amplifier, while the 3.3V boost rail powers the digital section from a single cell. This two-rail, one-IC approach reduces component count and keeps analog and digital supplies separated for better noise performance.
موصى به
ملخص المنتجات الموصى بها
بيانات مرجعية هندسية لـ TPS610981DSER — المقارنة وإرشادات التصميم ومعلومات الامتثال.
دليل الاختيار
المقارنة مع البدائل
| المعامل | هذا المنتج | TPS610980DSER | TPS61291DSER | TPS61299DSER |
|---|---|---|---|---|
| Package | 6-WSON (1.5x1.5 mm) | 6-WSON (1.5x1.5 mm) - same | 6-WSON - same family size, different pinout | 6-WSON - same family size, different pinout |
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments |
| Integrated LDO | Yes | No (load switch) | No | No |
| Secondary Rail | LDO output | Load switch output | None | None |
| Pin Compatible | - | Yes (drop-in) | No | No |
أبرز الفروقات
- Integrated second rail (LDO) (مقابلTPS61299DSER)
- Ultra-low 300 nA quiescent current (مقابلTLV61225DSER)
- True load disconnect at shutdown (مقابلTPS61291DSER)
ملاحظات التصميم
In the 1.5x1.5mm WSON-6 layout, place the 2.2 uH inductor within 1 mm of the SW pin and keep the SW node copper area minimal to limit EMI. Place input ceramic capacitor directly at VIN/GND and the output capacitor at VOUT/GND with short, wide traces. Use multiple vias to the ground plane under the device thermal pad for low-impedance return and heat dissipation.
The 300 nA quiescent current benefit is lost if leaky external components are used: select ceramic capacitors with low leakage and a resistor divider-free fixed-output configuration where possible. In shutdown, true load disconnect prevents the output from back-feeding the battery, but downstream leakage paths in the load circuit can still drain the cell - audit the full BOM for standby consumption.
Do not substitute a different pinout boost converter (e.g., TPS61299, TLV61225) without PCB rework - TI explicitly marks these as same-function, different pinout. Also verify the LDO output current budget: the LDO is powered from the boost output, so total load current must stay within the converter's capability; oversizing the LDO rail load can collapse the boost rail at low battery voltage.
معلومات الامتثال
RoHS compliant and lead-free per TI product page and DigiKey listing. REACH, halogen-free, and conflict minerals status should be confirmed via TI.com quality/environmental documentation.
