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Analog Devices Inc. LTC3106IUDC#PBF
- Part No.:
- LTC3106IUDC#PBF
- Manufacturer:
- Analog Devices Inc.
- Package:
- 20-WFQFN Exposed Pad
- Datasheet:
-
LTC3106IUDC#PBF.pdf
- Description:
- IC REG BUCK BST PROG 300MA 20QFN
- Quantity:
- Payment:
- Shipping:
Inventory:792
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Product details
Overview
LTC3106IUDC#PBF from Analog Devices (formerly Linear Technology) is an ultralow-voltage, 300mA buck-boost DC/DC converter with integrated PowerPath™ management, optimized for energy harvesting and dual-source systems. It starts up from as low as 850mV on VIN (no backup), draws only 1.6µA quiescent current at no load, supports digitally programmable VOUT (1.8V–5V) and VSTORE (2.7V–4.1V), and seamlessly switches between primary and backup power sources in wireless sensor nodes.
For engineers reviewing the LTC3106IUDC#PBF datasheet, LTC3106IUDC#PBF pinout, LTC3106IUDC#PBF application, or LTC3106IUDC#PBF equivalent, key selection considerations include its sub-1V startup capability, 20-pin 3mm × 4mm QFN package with exposed thermal pad, shelf-mode VSTORE leakage <25nA, selectable 90mA/650mA peak current limit, and compatibility with solar cells, thermoelectric generators, and primary/rechargeable backup batteries.
Technical Context
The LTC3106IUDC#PBF implements a synchronous four-switch buck-boost topology with automatic source arbitration via VBEST logic, enabling regulation when VIN or VSTORE is above, below, or equal to VOUT. Its dual-input architecture uses dedicated MOSFETs (A1/A2/D1/D2/B/C) with RDS(ON) ranging from 0.5Ω to 2.9Ω and supports MPP control via external resistor programming on the MPP pin.
PowerPath management is controlled by ENVSTR (enables VSTORE backup), PRI (selects primary vs. rechargeable battery mode), and ILIMSEL (chooses 90mA or 650mA peak inductor current). Output voltage is set via OS1/OS2 digital inputs; VSTORE voltage range is selected via SS1/SS2; RUN pin provides accurate 600mV enable threshold with 100mV hysteresis.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VIN Start-Up Voltage | 850mV typical - enables operation directly from low-power ambient sources like TEGs or small solar cells without pre-bias. |
| Quiescent Current | 1.6µA at no load - preserves energy in intermittently powered systems during extended sleep periods. |
| Output Current | 300mA max - sufficient to power microcontrollers, RF transceivers, and sensors in ultra-low-power IoT nodes. |
| VOUT Range | 1.8V to 5.0V, digitally programmable - eliminates external feedback resistors and simplifies BOM across multiple voltage requirements. |
| VSTORE Range | 2.7V to 4.1V, digitally selectable - supports Li-ion, LiFePO₄, or primary coin cells as backup with precise charge/discharge thresholds. |
| Peak Current Limit | 90mA or 650mA, user-selectable via ILIMSEL - balances efficiency and inductor size for light-load vs. burst-power applications. |
| Shelf Mode Leakage | <25nA on VSTORE - ensures multi-year shelf life for backup batteries in deployed remote sensors. |
Pinout & Package
The LTC3106IUDC#PBF is housed in a thermally enhanced 20-lead (3mm × 4mm) plastic QFN package with exposed GND pad (Pin 21), requiring soldering to PCB for rated θJA = 52°C/W performance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN (Pin 16) | Main input supply | Accepts 0.25V–5.1V; start-up possible at 850mV with no backup, or 300mV with VSTORE present. |
| VSTORE (Pin 19) | Backup power input | Connects to rechargeable or primary battery; charging enabled only when PRI = GND and ENVSTR = VSTORE. |
| VOUT (Pin 2) | Regulated output | Programmable 1.8V/2.2V/3.3V/5.0V; requires ≥22µF low-ESR capacitor for stability under load. |
| SW1/SW2 (Pins 18/17) | Buck-boost switch nodes | Drive external 10µH inductor; internal MOSFETs support synchronous 4-switch operation. |
| RUN (Pin 13) | Enable & UVLO control | Accurate 600mV enable threshold with 100mV hysteresis; ties to VIN or divider for custom turn-on voltage. |
| ENVSTR (Pin 14) | VSTORE enable | Must be tied to VSTORE to activate backup path; grounding disables VSTORE entirely. |
| PRI (Pin 11) | Battery type select | Tie to VCC for primary (non-rechargeable) battery; tie to GND to enable trickle charging of secondary battery. |
| ILIMSEL (Pin 12) | Current limit mode | Logic high selects 650mA peak limit; logic low selects 90mA for ultra-low-power operation. |
| OS1/OS2 (Pins 5/6) | VOUT programming | Digital inputs setting output voltage per Table 1 (e.g., OS1=VCC, OS2=GND → 3.3V). |
| SS1/SS2 (Pins 10/9) | VSTORE voltage range | Select upper/lower VSTORE thresholds (e.g., SS1=GND, SS2=VCC → 2.81V–1.90V window). |
| PGOOD (Pin 7) | Power status indicator | Open-drain output asserting low when VOUT drops >9% below target; 3.5ms delay after enable. |
| MPP (Pin 8) | MPPT reference input | Connect resistor to GND to set MPP activation point; tie to VCC to disable MPPT function. |
| GND (Pins 15, 21) | Ground reference | Pin 21 is exposed thermal pad - must be soldered to PCB ground plane for thermal and electrical integrity. |
Key Features
| Feature | Design Value |
|---|---|
| Ultralow startup voltage | 850mV from VIN alone enables direct harvesting from micro-energy sources without boost pre-regulator. |
| Zero-power Shelf Mode | VSTORE leakage <25nA preserves battery charge for >10 years - critical for maintenance-free remote deployments. |
| Dual-input PowerPath™ | Automatic seamless switchover between VIN and VSTORE with no external circuitry or firmware intervention. |
| Digitally programmable outputs | VOUT and VSTORE voltages set via logic pins - eliminates trimming resistors and supports multi-voltage designs with one BOM. |
| Maximum Power Point Control | Configurable MPP comparator optimizes power extraction from solar or TEG sources using single external resistor. |
| Accurate RUN threshold | 600mV ±15mV enable point with built-in hysteresis ensures reliable turn-on/turn-off without external comparators. |
Applications
| Wireless Sensor Nodes | Energy Harvesting Systems |
|---|---|
Use Scenario: Battery-less temperature/humidity sensor node powered by indoor light or thermal gradient. IC Role / Device Role / Timing Role: Primary power manager converting microwatt-level solar/TEG output to stable 3.3V for MCU and BLE radio. Use Value: 1.6µA quiescent current and 850mV startup allow continuous operation from weak ambient sources; shelf-mode extends backup battery life beyond 10 years. | Use Scenario: Industrial vibration monitor harvesting energy from machine motion using piezoelectric transducer. IC Role / Device Role / Timing Role: Buck-boost regulator with MPP control maximizing power transfer from high-impedance AC source rectified to DC. Use Value: Programmable MPP pin and 300mV VIN startup with backup ensure uninterrupted operation during low-harvest periods. |
| Building Automation Sensors | Remote Environmental Monitoring |
Use Scenario: Occupancy sensor in smart office ceiling tile, powered by ambient light and backed by coin cell. IC Role / Device Role / Timing Role: Dual-input PowerPath manager sourcing from photodiode array and switching to CR2032 when light fades. Use Value: Seamless transition with no brownout; digitally set VOUT=3.3V and VSTORE=3.0V match MCU and sensor rail requirements. | Use Scenario: Outdoor soil moisture sensor deployed for 5+ years in unattended agricultural field. IC Role / Device Role / Timing Role: Energy-harvesting PMIC managing solar input and LiFePO₄ backup while minimizing self-discharge. Use Value: 25nA shelf-mode leakage and 2.7V–4.1V VSTORE programming prevent overcharge/overdischarge of long-life battery. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar ultralow-voltage buck-boost power management applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LTC3108EDD#PBF | Higher 20V input rating; fixed 2.2V/3.3V VOUT; no VSTORE programming; 3µA IQ | Optimized for higher-voltage TEGs; lacks dual-source arbitration and backup battery management | Choose for pure TEG harvesting where backup battery is unnecessary and input exceeds 5.1V. |
| BQ25504RGTT | TI part with 330mV startup; 350nA IQ; integrated cold-start circuit; no VSTORE voltage programming | Superior for ultra-low-IQ applications but limited to single-source + storage; less flexible VOUT/VSTORE configuration | Prefer when minimum system IQ dominates design and digital voltage selection is not required. |
Compared with LTC3108EDD#PBF and BQ25504RGTT, the LTC3106IUDC#PBF uniquely combines sub-1V startup, dual-source PowerPath™, digitally programmable VOUT/VSTORE, and shelf-mode preservation - making it optimal for long-life, multi-source IoT edge nodes requiring field-replaceable backup power.
Availability
LTC3106IUDC#PBF is available at Aetrix Electronics and suitable for wireless sensor networks, building automation systems, and remote environmental monitoring requiring stable component supply across extended product lifecycles.
Supply support for LTC3106IUDC#PBF 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
Analog Devices acquired Linear Technology in 2017 and maintains its legacy of high-performance analog, power management, and signal conditioning ICs for demanding industrial and instrumentation applications.
The LTC3106 product line is designed specifically for energy-constrained, multisource power systems - delivering regulated output from microwatt ambient harvesters while managing primary and backup batteries with minimal overhead.
FAQ
What is the minimum input voltage required for LTC3106IUDC#PBF to start up with no backup source?
The LTC3106IUDC#PBF starts up from as low as 850mV on VIN when no backup source is present. This specification is verified across temperature and process corners, enabling direct operation from low-output energy harvesters such as miniature solar cells or thermoelectric generators without auxiliary bias. The LTC3106IUDC#PBF achieves this via proprietary start-up circuitry that operates below conventional CMOS thresholds.
How does the LTC3106IUDC#PBF manage seamless switchover between VIN and VSTORE?
The LTC3106IUDC#PBF uses internal VBEST logic to continuously monitor VIN, VSTORE, VOUT, and VAUX, selecting the highest valid source to power the system. When VIN drops below regulation, the device transitions to VSTORE within microseconds without output dropout or reset - provided ENVSTR is tied to VSTORE and PRI is configured appropriately. No external control or firmware is needed for this PowerPath™ arbitration.
Can the LTC3106IUDC#PBF charge a rechargeable battery connected to VSTORE?
Yes - when PRI is tied to GND, the LTC3106IUDC#PBF enables trickle charging of a rechargeable battery on VSTORE whenever surplus energy is available from VIN. Charging voltage is digitally set via SS1/SS2 pins (e.g., 2.81V–1.90V window), and the device enforces precise upper/lower thresholds to prevent overcharge or deep discharge. If PRI = VCC, charging is disabled for primary (non-rechargeable) batteries.
What is the purpose of the Shelf Mode function in the LTC3106IUDC#PBF?
Shelf Mode in the LTC3106IUDC#PBF minimizes VSTORE leakage current to under 25nA when the system is inactive, preserving backup battery charge for over a decade. This is achieved by disconnecting internal circuitry from VSTORE while maintaining readiness to resume operation instantly upon VIN or RUN pin assertion. Shelf Mode is automatically engaged during extended idle periods and is critical for maintenance-free remote deployments.
Does the LTC3106IUDC#PBF support Maximum Power Point Tracking (MPPT)?
Yes - the LTC3106IUDC#PBF includes a dedicated MPP pin that accepts an external resistor to program the activation point for its internal MPPT comparator. When enabled, the device dynamically adjusts operating point to extract maximum power from variable sources like solar panels or thermoelectric generators. MPPT is disabled by tying MPP to VCC, and the feature operates independently of VOUT regulation or PowerPath™ state.
LTC3106IUDC#PBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 20-WFQFN Exposed Pad
- Packaging:
- Tube
- Product Status:
- Active
- Function:
- Step-Up/Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck-Boost
- Output Type:
- Programmable
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 0.85V
- Voltage - Input (Max):
- 6V
- Voltage - Output (Min/Fixed):
- 1.8V, 2.2V, 3.3V, 5V
- Voltage - Output (Max):
- -
- Current - Output:
- 300mA
- Frequency - Switching:
- -
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-QFN (3x4)
LTC3106IUDC#PBF FAQ
1.How can I place an order for LTC3106IUDC#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC3106IUDC#PBF on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for LTC3106IUDC#PBF reliable?
The price and inventory of LTC3106IUDC#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC3106IUDC#PBF is usually 5 days.
3.What payment methods are accepted for LTC3106IUDC#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC3106IUDC#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC3106IUDC#PBF?
LTC3106IUDC#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC3106IUDC#PBF order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for LTC3106IUDC#PBF?
For technical support, including LTC3106IUDC#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC3106IUDC#PBF requirements.
6.How does Aetrix verify that LTC3106IUDC#PBF is sourced from the original manufacturer or authorized distributors?
All LTC3106IUDC#PBF products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that LTC3106IUDC#PBF meets industry standards.
7.What is the process for return or replacement of LTC3106IUDC#PBF?
All LTC3106IUDC#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC3106IUDC#PBF, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The LTC3106IUDC#PBF part is unused and in its original packaging.
Return procedure for LTC3106IUDC#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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