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Analog Devices Inc. LTC3106EUDC#TRPBF
- Part No.:
- LTC3106EUDC#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Package:
- 20-WFQFN Exposed Pad
- Datasheet:
-
LTC3106EUDC#TRPBF.pdf
- Description:
- IC REG BUCK BST PROG 300MA 20QFN
- Quantity:
- Payment:
- Shipping:
Inventory:4,595
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Product details
Overview
LTC3106EUDC#TRPBF 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 as low as 0.3V (with backup source), draws only 1.6µA quiescent current, and supports digitally programmable VOUT and VSTORE voltages. It is used in wireless sensor nodes powered by solar cells or thermoelectric generators with primary battery backup.
For engineers reviewing the LTC3106EUDC#TRPBF datasheet, LTC3106EUDC#TRPBF pinout, LTC3106EUDC#TRPBF application, or LTC3106EUDC#TRPBF equivalent, key selection criteria include start-up voltage (0.3V with VSTORE), PowerPath arbitration logic, MPP control capability, shelf-mode leakage (<25nA), and 20-pin 3mm × 4mm QFN thermal performance.
Technical Context
The LTC3106EUDC#TRPBF implements a synchronous four-switch buck-boost topology with automatic source selection between VIN and VSTORE via internal MOSFETs (A1/A2/D1/D2/B/C). Its state machine manages seamless switchover, burst-mode operation at light loads, and accurate RUN pin threshold (0.591V typical) for precise undervoltage lockout.
It integrates dual digital programming interfaces: OS1/OS2 for VOUT (1.8V/2.2V/3.3V/5V), and SS1/SS2 for VSTORE operating range (e.g., 2.70–4.10V), while PRI and ENVSTR pins configure backup battery type (primary vs. rechargeable) and enable VSTORE sourcing.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Start-Up Voltage | 0.3V with VSTORE present; enables operation from weak ambient sources like thermoelectric generators. |
| Quiescent Current | 1.6µA at no load; preserves energy in long-idle energy harvesting nodes. |
| Output Current | 300mA peak; sufficient to power RF transceivers (e.g., LoRa, BLE) and microcontrollers. |
| VOUT Programming | Digital selection of 1.8V/2.2V/3.3V/5V via OS1/OS2; eliminates external feedback resistors. |
| VSTORE Range | Programmable 2.70–4.10V via SS1/SS2; supports Li-ion, LiFePO₄, or supercapacitor backup storage. |
| MPP Control | Internal comparator with 1.5µA typical sink current; optimizes power extraction from PV or TEG sources. |
| Shelf Mode Leakage | <25nA on VSTORE; prevents backup battery discharge during multi-year storage. |
Pinout & Package
Package: 20-lead (3mm × 4mm) plastic QFN with exposed thermal pad (Pin 21 = GND). Requires soldering exposed pad to PCB ground plane for θJA = 52°C/W thermal performance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN | Main input supply | Accepts 0.25–5.1V; start-up possible at 0.3V when VSTORE is active. |
| VSTORE | Backup energy source input | Connects to rechargeable or primary battery; charging enabled only when PRI = GND. |
| VOUT | Regulated system output | Digitally programmed voltage rail (1.8–5V); requires ≥22µF low-ESR output capacitor. |
| RUN | Enable & UVLO control | Accurate 0.591V enable threshold; supports external divider for custom turn-on voltage. |
| ENVSTR | VSTORE enable signal | Tie to VSTORE to activate backup path; grounding disables VSTORE sourcing. |
| PRI | Primary battery mode select | Tie to VCC for non-rechargeable battery; tie to GND to enable trickle charging of secondary battery. |
| MPP | Maximum Power Point input | Connect resistor to GND to set MPP activation point; short to VCC disables MPP function. |
| PGOOD | Power-good indicator | Open-drain output asserting low when VOUT drops >9% below regulation; 3.5ms delay after enable. |
Key Features
| Feature | Design Value |
|---|---|
| Automatic PowerPath™ arbitration | Seamlessly transitions between VIN and VSTORE without output interruption or brownout. |
| Dual digital voltage programming | VOUT and VSTORE thresholds set via logic-level pins-no external resistors required. |
| Burst Mode® operation | Maintains regulation down to µA loads while holding quiescent current at 1.6µA. |
| Zero-power Shelf Mode | VSTORE leakage <25nA ensures >10-year shelf life for backup batteries in unpowered systems. |
| Selectable peak current limit | 90mA/650mA options via ILIMSEL pin-optimizes efficiency for low-power sensors or higher-load peripherals. |
Applications
| Wireless Sensor Networks | Energy Harvesting Systems |
|---|---|
Use Scenario: Battery-free temperature/humidity node powered by indoor light-harvesting PV cell with Li-ion backup. IC Role / Device Role / Timing Role: Buck-boost regulator and PowerPath manager providing stable 3.3V to MCU and sub-GHz radio. Use Value: Enables continuous operation through night/dark periods using stored energy; 0.3V start-up captures microwatt-level ambient power. | Use Scenario: Industrial vibration monitor using thermoelectric generator (TEG) mounted on motor housing. IC Role / Device Role / Timing Role: Ultralow-voltage DC/DC converter with MPP control extracting maximum power from millivolt-level TEG output. Use Value: 1.6µA quiescent current and 0.85V no-backup start-up allow reliable startup from low-ΔT thermal gradients. |
| Home Automation Sensors | Remote Environmental Monitoring |
Use Scenario: Wireless window contact sensor powered by miniature solar cell with coin-cell backup. IC Role / Device Role / Timing Role: Dual-input power manager selecting between solar (VIN) and CR2032 (VSTORE) based on availability. Use Value: Digital VOUT/VSTORE programming simplifies BOM; shelf mode preserves coin-cell capacity for >5 years. | Use Scenario: Off-grid soil moisture sensor deployed in agricultural field with seasonal sunlight variation. IC Role / Device Role / Timing Role: Energy buffer and voltage regulator converting intermittent solar input into steady 5V for cellular modem wake-up bursts. Use Value: 300mA output drives high-current LTE-M transmission; programmable VSTORE range matches supercapacitor voltage profile. |
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 |
|---|---|---|---|
| LTC3108EDE#TRPBF | Lower 20mA max output; optimized for <100µW sources; no VSTORE charging; fixed 2.2V/3.3V VOUT. | Suitable only for ultra-low-power sensors without backup battery requirements. | Select when energy source is extremely weak (e.g., <50µW) and backup charging is unnecessary. |
| BQ25504RGTT | TI part with integrated cold-start circuit (20mV start); 150mA output; different MPP algorithm; no VSTORE voltage programming. | Requires external components for VSTORE management; less flexible VSTORE configuration. | Choose for designs prioritizing lowest possible cold-start voltage over programmability and shelf-life preservation. |
Compared with LTC3108EDE#TRPBF and BQ25504RGTT, the LTC3106EUDC#TRPBF uniquely combines 300mA output, full VSTORE charging control, digital VOUT/VSTORE programming, and sub-1µA shelf-mode leakage-making it optimal for robust, long-life dual-source systems.
Availability
LTC3106EUDC#TRPBF is available at Aetrix Electronics and suitable for wireless sensor networks, energy harvesting deployments, and remote environmental monitoring requiring stable component supply across extended product lifecycles.
Supply support for LTC3106EUDC#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 maintains its legacy of high-performance analog and power management ICs.
The LTC3106 belongs to Linear's energy harvesting PMIC family, designed specifically for autonomous, battery-free or battery-assisted IoT edge devices operating from ambient sources like light, heat, or vibration.
FAQ
What is the minimum input voltage required for LTC3106EUDC#TRPBF to start up when no backup source is connected?
The LTC3106EUDC#TRPBF requires a minimum VIN of 0.85V to initiate startup when VSTORE is absent or disabled. This enables operation from modest ambient sources such as small solar cells under low-light conditions. The device achieves this with internal charge pump circuitry and optimized gate drive, ensuring reliable turn-on even with limited initial energy.
How does the LTC3106EUDC#TRPBF manage seamless switchover between VIN and VSTORE?
The LTC3106EUDC#TRPBF uses internal voltage comparators and a state machine to continuously monitor VIN, VSTORE, and VOUT. When VIN drops below the regulated output level and VSTORE remains above its UVLO threshold (e.g., 1.778V), the controller switches sourcing to VSTORE within microseconds-maintaining uninterrupted VOUT regulation without brownout or reset. This PowerPath™ arbitration is fully autonomous and requires no external intervention.
Can the LTC3106EUDC#TRPBF charge a lithium-ion battery connected to VSTORE?
Yes, the LTC3106EUDC#TRPBF can trickle-charge a rechargeable battery on VSTORE when the PRI pin is tied to GND. Charging occurs only when surplus energy is available from VIN and stops automatically when VSTORE reaches its digitally programmed upper threshold (e.g., 4.10V). It does not provide constant-current/constant-voltage (CC/CV) charging, so external protection circuitry is required for safe Li-ion use.
What is the purpose of the ENVSTR pin on the LTC3106EUDC#TRPBF?
The ENVSTR pin on the LTC3106EUDC#TRPBF enables or disables the VSTORE backup path. When tied to VSTORE, it activates the internal VSTORE sourcing FETs and allows seamless switchover. When grounded, VSTORE is completely isolated-even if voltage is present-preventing unintended discharge or charging. This provides explicit system-level control over backup resource usage.
Does the LTC3106EUDC#TRPBF support maximum power point tracking for photovoltaic sources?
Yes, the LTC3106EUDC#TRPBF includes a dedicated MPP pin that accepts a resistor divider from the PV source to GND. The internal 1.5µA current sink creates a reference point; when the PV voltage crosses this point, the controller adjusts duty cycle to maintain operation at peak power. This analog MPP algorithm is simple, low-power, and effective for small-area or low-irradiance solar harvesters.
LTC3106EUDC#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)
LTC3106EUDC#TRPBF FAQ
1.How can I place an order for LTC3106EUDC#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC3106EUDC#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 LTC3106EUDC#TRPBF reliable?
The price and inventory of LTC3106EUDC#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC3106EUDC#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC3106EUDC#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC3106EUDC#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC3106EUDC#TRPBF?
LTC3106EUDC#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC3106EUDC#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 LTC3106EUDC#TRPBF?
For technical support, including LTC3106EUDC#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC3106EUDC#TRPBF requirements.
6.How does Aetrix verify that LTC3106EUDC#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC3106EUDC#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 LTC3106EUDC#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC3106EUDC#TRPBF?
All LTC3106EUDC#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC3106EUDC#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 LTC3106EUDC#TRPBF part is unused and in its original packaging.
Return procedure for LTC3106EUDC#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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