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Analog Devices Inc. LTC3106IUDC#TRPBF
- Part No.:
- LTC3106IUDC#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Package:
- 20-WFQFN Exposed Pad
- Datasheet:
-
LTC3106IUDC#TRPBF.pdf
- Description:
- IC REG BUCK BST PROG 300MA 20QFN
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
LTC3106IUDC#TRPBF 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) or 300mV (with VSTORE), delivers regulated output up to 5V, draws only 1.6µA quiescent current, and supports digitally programmable VOUT and VSTORE voltages - enabling long-life operation in wireless sensor nodes powered by solar cells or thermoelectric generators.
For engineers reviewing the LTC3106IUDC#TRPBF datasheet, LTC3106IUDC#TRPBF pinout, LTC3106IUDC#TRPBF application, or LTC3106IUDC#TRPBF equivalent, key selection criteria include its sub-1V start-up capability, 1.6µA no-load IQ, dual-input seamless switchover, MPP control for photovoltaic sources, and support for primary or rechargeable backup batteries in compact 3mm × 4mm QFN packaging.
Technical Context
The LTC3106IUDC#TRPBF implements a synchronous buck-boost topology with four internal MOSFETs (A1/A2/D1/D2/B/C) and automatic source arbitration between VIN and VSTORE via VBEST logic. Its dual-stage start-up sequence first enables VAUX from VIN or VSTORE, then initiates switching once VAUX exceeds 5.2V, ensuring reliable bootstrapping from ultra-low-energy sources.
PowerPath management is implemented through dedicated control of PRI, ENVSTR, SS1/SS2, and ILIMSEL pins - enabling user-selectable VSTORE charge/discharge thresholds, peak current limits (60mA/100mA or 530mA/725mA), and MPP comparator activation via external resistor programming on the MPP pin.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Start-Up Voltage (VIN) | 850mV typical with no backup source; enables direct connection to single-cell solar panels or thermoelectric harvesters. |
| Quiescent Current | 1.6µA at no load; preserves battery life in multi-year remote sensing deployments. |
| Output Current | 300mA continuous; sufficient to power microcontrollers, RF transceivers, and analog sensors. |
| VOUT Range | Digitally selectable 1.8V/2.2V/3.3V/5.0V; eliminates external feedback resistors and reduces BOM count. |
| VSTORE Range | Programmable 2.7V–4.1V via SS1/SS2 pins; supports Li-ion, LiFePO₄, or supercapacitor backup storage. |
| Peak Current Limit | Selectable 60mA/100mA (low-power) or 530mA/725mA (high-power); matches load requirements without overdesigning magnetics. |
| Operating Temp | –40°C to +125°C junction; qualified for industrial and outdoor environmental monitoring applications. |
Pinout & Package
The LTC3106IUDC#TRPBF is housed in a thermally enhanced 20-lead (3mm × 4mm) plastic QFN package with exposed pad (Pin 21 = GND). The package supports high-density PCB layouts and efficient heat dissipation in space-constrained energy harvesting modules.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN | Main input supply | Accepts 0.25V–5.1V; powers system when primary source is active; start-up threshold is 850mV (typ). |
| VSTORE | Backup energy source | Connects to secondary battery or capacitor; provides seamless switchover when VIN drops below UVLO. |
| VOUT | Regulated output | Digitally programmed voltage rail (1.8V–5.0V); requires ≥22µF low-ESR output capacitor. |
| ENVSTR | VSTORE enable control | Tie to VSTORE to activate backup path; grounding disables VSTORE entirely. |
| PRI | Primary battery mode select | Tie to VCC for non-rechargeable primary battery; tie to GND to enable trickle charging of rechargeable VSTORE. |
| ILIMSEL | Peak current limit select | High = 530/725mA; Low = 60/100mA; optimizes inductor sizing and efficiency across load ranges. |
| MPP | Maximum Power Point input | External resistor sets activation point for solar cell MPPT; connect to VCC to disable. |
| RUN | Enable & UVLO threshold | Accurate 600mV threshold enables VIN operation; hysteresis ensures stable turn-on/turn-off. |
| PGOOD | Output voltage monitor | Open-drain indicator asserts low if VOUT falls >9% below setpoint; used for system reset or sequencing. |
| SW1/SW2 | Buck-boost switch nodes | Connect external 10µH inductor between these pins; internal MOSFETs handle synchronous rectification. |
Key Features
| Feature | Design Value |
|---|---|
| Ultralow start-up voltage | Enables direct harvesting from micro-watt sources like indoor PV or thermal gradients without pre-charging. |
| Zero-power Shelf Mode | VSTORE leakage <25nA preserves battery shelf life for >10 years when disconnected from load. |
| Dual-input PowerPath™ | Automatic, glitch-free switchover between VIN and VSTORE prevents brownouts during source transitions. |
| Digitally programmable outputs | VOUT and VSTORE voltages set via OS1/OS2 and SS1/SS2 pins - no external resistors required. |
| Integrated MPP control | On-chip comparator with 1.5µA reference current enables simple, low-component-count solar MPPT. |
| Burst Mode® operation | Maintains high light-load efficiency down to µA-level currents while minimizing output ripple. |
Applications
| Wireless Sensor Networks | Energy Harvesting Systems |
|---|---|
Use Scenario: Battery-less temperature/humidity node deployed in HVAC ducts using thermoelectric generator (TEG) as sole power source. IC Role / Device Role / Timing Role: LTC3106IUDC#TRPBF acts as the primary power manager, converting TEG's variable low-voltage output into stable 3.3V for MCU and BLE radio. Use Value: 300mV start-up allows operation even at ΔT < 5°C; 1.6µA quiescent current extends functional uptime between maintenance cycles. | Use Scenario: Indoor light-powered occupancy sensor using amorphous silicon PV cell and supercapacitor buffer. IC Role / Device Role / Timing Role: LTC3106IUDC#TRPBF manages both PV input and supercapacitor backup, implementing MPP tracking and VSTORE regulation. Use Value: Programmable VSTORE (2.7–4.1V) matches supercapacitor voltage range; MPP pin enables >90% energy capture under dim lighting. |
| Remote Industrial Monitoring | Building Automation Sensors |
Use Scenario: Corrosion-resistant pressure sensor mounted on offshore oil pipeline, powered by miniature wind turbine. IC Role / Device Role / Timing Role: LTC3106IUDC#TRPBF regulates erratic turbine output (0.5–4.5V) to clean 5V rail for LoRaWAN transmitter. Use Value: Buck-boost topology maintains regulation across full input range; thermal shutdown protects against ambient extremes (–40°C to +125°C). | Use Scenario: Self-powered CO₂ sensor in smart office ceiling tile, harvesting ambient light and recharging LiFePO₄ backup cell. IC Role / Device Role / Timing Role: LTC3106IUDC#TRPBF serves as dual-role converter and charger, delivering 3.3V to sensor IC while maintaining VSTORE at 3.6V. Use Value: PRI = GND enables safe trickle charging; Shelf Mode prevents self-discharge during weekend building shutdowns. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar buck-boost power management applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LTC3108EDD#TRPBF | Higher start-up voltage (20mV from thermocouple, 380mV from PV); lower max output current (200mA); includes integrated cold-junction compensation. | Optimized for thermoelectric (TEG) harvesting only; lacks VSTORE programmability and PowerPath switchover. | Choose LTC3108EDD#TRPBF for dedicated TEG applications requiring ultra-low-voltage start-up and analog sensor interface. |
| BQ25504RGTT | Lower quiescent current (330nA); integrated battery management (charge termination, protection); no VSTORE voltage programming. | Designed for single-battery energy harvesting; lacks dual-input arbitration and programmable VOUT/VSTORE. | Choose BQ25504RGTT for solar-powered IoT nodes where battery safety and ultra-low IQ outweigh need for flexible backup source control. |
Compared with LTC3108EDD#TRPBF and BQ25504RGTT, the LTC3106IUDC#TRPBF uniquely combines dual-input PowerPath™, digitally programmable VOUT/VSTORE, and 300mA output in one IC - making it optimal for hybrid-harvesting systems requiring field-reconfigurable voltage rails and seamless source redundancy.
Availability
LTC3106IUDC#TRPBF is available at Aetrix Electronics and suitable for wireless sensor networks, energy harvesting systems, and remote industrial monitoring requiring stable component supply, long-term lifecycle support, and guaranteed performance across –40°C to +125°C operating conditions.
Supply support for LTC3106IUDC#TRPBF 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 continues to develop and support its precision analog and power management portfolio.
The LTC3106IUDC#TRPBF belongs to Linear's Energy Harvesting Power Management product line, designed specifically for ultra-low-power, multi-source systems where reliability, minimal quiescent current, and autonomous source arbitration are critical.
FAQ
What is the minimum input voltage required for LTC3106IUDC#TRPBF to start up?
The LTC3106IUDC#TRPBF starts up from 850mV on VIN when no backup source is present, and as low as 300mV when VSTORE is connected and enabled via ENVSTR. This enables direct interfacing with low-output energy harvesters such as indoor photovoltaics or small thermoelectric generators without external boost stages.
How does the LTC3106IUDC#TRPBF manage seamless switchover between VIN and VSTORE?
The LTC3106IUDC#TRPBF uses internal VBEST logic to continuously monitor VIN, VSTORE, VAUX, and VOUT, selecting the highest valid source to power VAUX and VOUT. When VIN drops below its UVLO threshold, the IC automatically transfers load to VSTORE without output interruption or brownout - a core function of its integrated PowerPath™ architecture.
Can the LTC3106IUDC#TRPBF charge a rechargeable battery connected to VSTORE?
Yes - when the PRI pin is tied to GND, the LTC3106IUDC#TRPBF enables trickle charging of rechargeable batteries or supercapacitors on VSTORE. Charging occurs whenever surplus energy is available from VIN, and the upper/lower VSTORE voltage thresholds are programmable via SS1/SS2 pins to match battery chemistry.
What is the purpose of the MPP pin on the LTC3106IUDC#TRPBF?
The MPP pin on the LTC3106IUDC#TRPBF accepts an external resistor to set the activation point for the internal maximum power point comparator. When enabled, this circuit adjusts the converter's operating point to extract peak power from photovoltaic sources - improving energy capture efficiency by up to 30% under partial shading or low-light conditions.
Does the LTC3106IUDC#TRPBF support programmable output voltage?
Yes - the LTC3106IUDC#TRPBF supports four discrete VOUT settings (1.8V, 2.2V, 3.3V, and 5.0V) selected via OS1 and OS2 pin logic states. This eliminates the need for external feedback resistors, reduces component count, improves accuracy over temperature, and simplifies firmware configuration in multi-rail systems.
LTC3106IUDC#TRPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 20-WFQFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- 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#TRPBF FAQ
1.How can I place an order for LTC3106IUDC#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC3106IUDC#TRPBF 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#TRPBF reliable?
The price and inventory of LTC3106IUDC#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC3106IUDC#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC3106IUDC#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC3106IUDC#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC3106IUDC#TRPBF?
LTC3106IUDC#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC3106IUDC#TRPBF 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#TRPBF?
For technical support, including LTC3106IUDC#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC3106IUDC#TRPBF requirements.
6.How does Aetrix verify that LTC3106IUDC#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC3106IUDC#TRPBF 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#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC3106IUDC#TRPBF?
All LTC3106IUDC#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC3106IUDC#TRPBF, 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#TRPBF part is unused and in its original packaging.
Return procedure for LTC3106IUDC#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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