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Analog Devices Inc. LTC3106EUDC#PBF
- Part No.:
- LTC3106EUDC#PBF
- Manufacturer:
- Analog Devices Inc.
- Package:
- 20-WFQFN Exposed Pad
- Datasheet:
-
LTC3106EUDC#PBF.pdf
- Description:
- IC REG BUCK BST PROG 300MA 20QFN
- Quantity:
- Payment:
- Shipping:
Inventory:295
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Product details
Overview
LTC3106EUDC#PBF from Analog Devices (formerly Linear Technology) is an ultralow-voltage, 300mA buck-boost DC/DC converter with integrated PowerPath™ management for energy-harvesting and dual-source systems. It delivers regulated output up to 5V from input sources as low as 0.3V (with backup) or 0.85V (no backup), 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 LTC3106EUDC#PBF datasheet, LTC3106EUDC#PBF pinout, LTC3106EUDC#PBF application, or LTC3106EUDC#PBF equivalent, key selection considerations include its sub-1V start-up capability, seamless VIN/VSTORE switchover, MPP control for harvesting optimization, shelf-mode leakage <25nA, and 20-pin 3mm × 4mm QFN package with exposed thermal pad.
Technical Context
The LTC3106EUDC#PBF implements a synchronous buck-boost topology with four internal MOSFETs (A1/A2/D1/D2/B/C) and adaptive switching control to maintain regulation across VIN or VSTORE inputs both above and below VOUT. Its state machine manages PowerPath arbitration between primary (VIN) and backup (VSTORE) sources, with automatic switchover triggered by input voltage thresholds and ENVSTR enable status.
It integrates analog comparators for accurate RUN pin threshold (600mV ±15mV), PGOOD monitoring (–9% hysteresis), MPP setpoint control (1.5µA reference), and digital programming of VOUT (1.8V/2.2V/3.3V/5V) and VSTORE (2.7V–4.1V in four ranges) via OS[1:2] and SS[1:2] pins - eliminating external resistive dividers and reducing BOM count.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Start-Up Voltage | 0.85V min from VIN (no backup); 0.3V min with VSTORE present - enables direct startup from weak energy harvesters like single-cell thermoelectrics or small PV modules. |
| Quiescent Current | 1.6µA at no load - preserves micropower operation in intermittently active sensor nodes during extended sleep cycles. |
| Output Current | 300mA max continuous - sufficient to power RF transceivers (e.g., BLE, LoRa) and microcontrollers in ultra-low-power edge devices. |
| VOUT Programming | Digital selection of 1.8V/2.2V/3.3V/5V via OS1/OS2 pins - eliminates external feedback resistors and improves voltage accuracy vs. resistor-based solutions. |
| VSTORE Range | Programmable 2.7V–4.1V (four combinations via SS1/SS2) - matches common Li-ion, LiPo, or supercapacitor backup storage voltages. |
| MPP Control | Internal comparator with 1.5µA reference current - allows precise maximum power point tracking using a single external resistor, optimizing energy transfer from variable-output harvesters. |
| Shelf Mode Leakage | <25nA VSTORE discharge - ensures multi-year shelf life for battery-backed systems left unpowered in storage. |
Pinout & Package
Package: 20-lead (3mm × 4mm) plastic QFN with exposed thermal pad (Pin 21 = GND). Requires soldering of exposed pad to PCB ground plane for thermal performance (θJA = 52°C/W).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN (16) | Main supply input | Accepts ultralow input (0.3V–5.1V); requires ≥10µF input capacitance; start-up enabled when >0.85V (no backup) or >0.3V (with VSTORE). |
| VSTORE (19) | Backup power source input | Connects to rechargeable or primary battery; charging enabled only when PRI = GND; voltage range set by SS1/SS2. |
| VOUT (2) | Regulated output | Digitally programmed (1.8V–5V); requires ≥22µF low-ESR output capacitor; PGOOD monitors regulation status. |
| SW1/SW2 (17/18) | Buck-boost switch nodes | Connect external 10µH inductor between these pins; internal synchronous MOSFETs handle all conduction modes. |
| RUN (13) | Enable & UVLO control | Two thresholds: 400mV (partial enable), 600mV (full VIN operation); 100mV hysteresis prevents chatter near turn-on. |
| ENVSTR (14) | VSTORE enable input | Tie to VSTORE to activate backup path; grounding disables VSTORE use - critical for safe primary-battery-only operation. |
| PRI (11) | Primary battery mode select | Tie to VCC to disable VSTORE charging (for non-rechargeable cells); tie to GND to enable trickle charge of secondary batteries. |
| ILIMSEL (12) | Peak current limit select | Ground = 90/650mA (low/high mode); VCC = 100/725mA - adjusts inductor current limits for light-load efficiency or high-output capability. |
Key Features
| Feature | Design Value |
|---|---|
| Ultralow start-up voltage | 0.3V minimum with VSTORE present - enables operation from micro-energy sources such as piezoelectric or thermoelectric harvesters without pre-charging. |
| PowerPath™ management | Automatic, seamless switchover between VIN and VSTORE with no external circuitry - maintains uninterrupted system power during primary source failure or depletion. |
| Digital VOUT/VSTORE programming | OS1/OS2 and SS1/SS2 pins configure output and storage voltages in discrete steps - eliminates trimming resistors and improves production consistency. |
| Maximum Power Point Control | On-chip MPP comparator with 1.5µA reference - simplifies MPPT implementation to one external resistor, improving harvesting efficiency without MCU intervention. |
| Zero-power Shelf Mode | <25nA VSTORE leakage with ENVSTR = 0V - preserves backup battery charge for >10 years in storage, critical for field-deployed maintenance-free sensors. |
| Selectable peak current limit | 90mA/650mA (ILIMSEL = GND) or 100mA/725mA (ILIMSEL = VCC) - balances light-load efficiency against maximum output capability for diverse load profiles. |
Applications
| Wireless Sensor Node | Energy-Harvesting IoT Gateway |
|---|---|
Use Scenario: Batteryless temperature/humidity sensor node powered by miniature solar cell and backed by LiPo coin cell. IC Role / Device Role / Timing Role: Primary power manager and regulator, converting variable 0.5–3.5V solar input to stable 3.3V while charging backup cell and maintaining runtime during darkness. Use Value: Enables 10+ year deployment without battery replacement using 1.6µA quiescent current and sub-1V start-up - validated in typical solar + LiPo configurations per LTC3106 TA01a. | Use Scenario: Industrial vibration monitor harvesting energy from rotating machinery via piezoelectric transducer. IC Role / Device Role / Timing Role: Ultralow-voltage buck-boost converter with MPP control, extracting maximum power from erratic 0.3–2.0V AC-rectified input and regulating to 1.8V for ultra-low-power MCU. Use Value: Delivers usable power from sub-0.5V sources where conventional converters fail - supported by 0.3V start-up spec and integrated MPP comparator. |
| Remote Building Automation Sensor | Low-Power Asset Tracker |
Use Scenario: Occupancy sensor in office ceiling powered by indoor light-harvesting PV and backed by primary alkaline battery. IC Role / Device Role / Timing Role: Dual-input PowerPath manager selecting between harvested PV power and primary battery, with PRI = VCC disabling charging to prevent alkaline cell damage. Use Value: Eliminates need for separate battery protection circuitry - PRI pin directly configures safe primary-cell operation per datasheet Note 7. | Use Scenario: GPS asset tracker deployed in cargo containers, powered by intermittent solar exposure and backed by supercapacitor. IC Role / Device Role / Timing Role: Buck-boost regulator with programmable VSTORE (set to 2.7V–4.1V range) and VCAP isolation pin, managing charge/discharge of supercapacitor bank during solar bursts. Use Value: VCAP pin isolates VSTORE from bulk capacitance during low-current charging - prevents excessive leakage and extends supercapacitor lifetime per Pin Functions section. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar ultralow-voltage buck-boost converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LTC3108EDE#PBF | Higher start-up voltage (20mV from thermoelectric, 380mV from PV); fixed 2.2V/3.3V VOUT; no VSTORE programming; integrated cold-start circuit. | Optimized for thermoelectric generators (TEG) with internal step-up transformer; lacks dual-source PowerPath and VSTORE backup management. | Choose LTC3108EDE#PBF for TEG-powered systems requiring lowest possible cold-start voltage; choose LTC3106EUDC#PBF for solar/PV + battery hybrid systems needing flexible VSTORE control. |
| BQ25504RGTT | 330mV min start-up; integrated battery management (charge termination, safety timers); fixed 3.3V/5V VOUT; no digital VSTORE programming. | Focused on solar + rechargeable battery systems with built-in charge control logic; lacks MPP programmability and sub-0.5V start-up capability. | Choose BQ25504RGTT for solar-powered Li-ion/LiPo systems requiring certified charge safety; choose LTC3106EUDC#PBF when MPP tuning, VSTORE voltage flexibility, or <0.5V start-up is required. |
Compared with LTC3108EDE#PBF and BQ25504RGTT, the LTC3106EUDC#PBF uniquely combines sub-0.5V start-up, dual-source PowerPath arbitration, digitally programmable VSTORE, and MPP resistor tuning - making it the only option supporting both ultralow-voltage harvesting and flexible backup battery integration in a single IC.
Availability
LTC3106EUDC#PBF is available at Aetrix Electronics and suitable for wireless sensor networks, energy-harvesting IoT gateways, and remote building automation systems requiring stable component supply across extended product lifecycles.
Supply support for LTC3106EUDC#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 full technical and manufacturing continuity for the LTC portfolio. Linear Technology pioneered high-performance power management ICs with emphasis on precision, efficiency, and ruggedness.
The LTC3106 belongs to Linear's ultralow-power energy harvesting PMIC family, designed specifically for batteryless or battery-assisted IoT endpoints where micropower efficiency, sub-1V start-up, and dual-source resilience are mandatory.
FAQ
What is the minimum input voltage required to start up the LTC3106EUDC#PBF?
The LTC3106EUDC#PBF starts up from VIN at 0.85V minimum when no backup source is present, and as low as 0.3V when VSTORE is connected and enabled via ENVSTR. This is confirmed in the Absolute Maximum Ratings and Electrical Characteristics tables, where VIN Minimum No-Load Start-Up Power is specified at 12µW and VIN Start-Up Voltage is 0.85V (typical) under no-backup conditions.
How does the LTC3106EUDC#PBF manage power switchover between VIN and VSTORE?
The LTC3106EUDC#PBF uses internal PowerPath™ logic to automatically and seamlessly switch between VIN and VSTORE based on real-time voltage comparison and ENVSTR pin state. When ENVSTR is tied to VSTORE and VIN drops below regulation, the device transitions to VSTORE without output interruption - verified in Typical Application TA01a and Simplified Operational Flow Charts SD01–SD03.
Can the LTC3106EUDC#PBF charge a rechargeable battery connected to VSTORE?
Yes, the LTC3106EUDC#PBF can trickle-charge a rechargeable battery on VSTORE when PRI is tied to GND and surplus energy is available from VIN. Charging is disabled when PRI = VCC - a hardware-configurable safety feature explicitly documented in the Pin Functions section and Note 7 of the datasheet.
What is the purpose of the VCAP pin on the LTC3106EUDC#PBF?
The VCAP pin on the LTC3106EUDC#PBF isolates the VSTORE input from the bulk decoupling capacitor during low-current charging phases, minimizing leakage and extending shelf life for low-capacity backup sources. It must be tied to VSTORE for primary/high-capacity batteries or grounded if unused - per Pin Functions description on page 11.
Does the LTC3106EUDC#PBF support Maximum Power Point Tracking (MPPT)?
Yes, the LTC3106EUDC#PBF includes an integrated MPP comparator with a 1.5µA reference current source. Connecting an external resistor from MPP to GND sets the activation point for MPPT, enabling optimized power extraction from variable-output harvesters - detailed in Pin Functions (page 11) and Electrical Characteristics (MPP Pin Output Current spec).
LTC3106EUDC#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)
LTC3106EUDC#PBF FAQ
1.How can I place an order for LTC3106EUDC#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC3106EUDC#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 LTC3106EUDC#PBF reliable?
The price and inventory of LTC3106EUDC#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC3106EUDC#PBF is usually 5 days.
3.What payment methods are accepted for LTC3106EUDC#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC3106EUDC#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC3106EUDC#PBF?
LTC3106EUDC#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC3106EUDC#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 LTC3106EUDC#PBF?
For technical support, including LTC3106EUDC#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC3106EUDC#PBF requirements.
6.How does Aetrix verify that LTC3106EUDC#PBF is sourced from the original manufacturer or authorized distributors?
All LTC3106EUDC#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 LTC3106EUDC#PBF meets industry standards.
7.What is the process for return or replacement of LTC3106EUDC#PBF?
All LTC3106EUDC#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC3106EUDC#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 LTC3106EUDC#PBF part is unused and in its original packaging.
Return procedure for LTC3106EUDC#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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