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Analog Devices Inc. LTC3106IFE#TRPBF
- Part No.:
- LTC3106IFE#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Package:
- 20-TSSOP (0.173", 4.40mm Width) Exposed Pad
- Datasheet:
-
LTC3106IFE#TRPBF.pdf
- Description:
- IC REG BUCK BOOST PROG 20TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,457
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Product details
Overview
LTC3106IFE#TRPBF from Analog Devices (formerly Linear Technology) is an ultralow-voltage, 300mA buck-boost DC/DC converter with integrated PowerPath™ management for energy-harvesting systems. It delivers regulated output up to 5V from input sources as low as 0.3V (with backup), draws only 1.6µA quiescent current, and supports dual-input seamless switchover between primary and rechargeable backup batteries in wireless sensor nodes.
For engineers reviewing the LTC3106IFE#TRPBF datasheet, LTC3106IFE#TRPBF pinout, LTC3106IFE#TRPBF application, or LTC3106IFE#TRPBF equivalent, key selection criteria include its 0.3V minimum start-up voltage with VSTORE present, digitally programmable VOUT/VSTORE, 100mA peak current limit option, shelf-mode leakage <25nA, and compatibility with solar, thermal, or piezoelectric harvesters requiring long-term autonomous operation.
Technical Context
The LTC3106IFE#TRPBF implements a synchronous four-switch buck-boost topology with automatic source arbitration via VBEST logic, enabling continuous regulation when VIN or VSTORE falls above, below, or equals VOUT. Its dual-stage start-up-first asynchronous (400mV RUN threshold), then accurate (600mV RUN threshold with 100mV hysteresis)-ensures reliable cold-start from micro-power sources.
Maximum Power Point Control (MPP) is implemented via a dedicated comparator with 1.5µA reference current, allowing external resistor programming of the harvest source's optimal operating point. The IC integrates MOSFET drivers with specified RDS(ON) values (e.g., 0.5Ω for N-channel B/C switches), and supports optional trickle charging of VSTORE when PRI = GND and surplus energy exists.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | VIN: 0.25V–5.1V (0.3V min with VSTORE present); enables direct connection to low-output-energy harvesters |
| Quiescent Current | 1.6µA at no load - preserves battery life in multi-year deployments |
| Output Current | 300mA max (ILIMSEL = HI) - sufficient for RF transceivers and microcontrollers in sensor nodes |
| VOUT Programming | Digital selection of 1.8V/2.2V/3.3V/5V via OS1/OS2 pins - eliminates external feedback resistors |
| VSTORE Voltage Range | Programmable 2.7V–4.1V (four combinations via SS1/SS2) - matches common Li-ion, LiFePO₄, or supercapacitor chemistries |
| Shelf Mode Leakage | <25nA on VSTORE - extends backup battery shelf life beyond 10 years |
| Power Good Threshold | –9% hysteresis on VOUT - provides robust system reset signaling without external supervision |
Pinout & Package
The LTC3106IFE#TRPBF is housed in a thermally enhanced 20-pin plastic TSSOP package (FE grade) with exposed pad soldered to PCB ground for optimal thermal performance (θJA = 48.6°C/W).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VSTORE (Pin 1) | Secondary supply input | Backup power source connection; enables trickle charge when PRI = GND and ENVSTR = VSTORE |
| VCAP (Pin 2) | VSTORE isolation node | Decouples VSTORE from bulk capacitance; ties to VSTORE for high-capacity batteries or GND for low-capacity cells |
| VOUT (Pin 3) | Regulated output | Programmable 1.8–5V rail; requires ≥22µF low-ESR capacitor for stability under load transients |
| VCC (Pin 6) | Internal bias rail | Not user-loadable; powers internal circuitry and must be decoupled with 0.1µF ceramic capacitor |
| OS1/OS2 (Pins 7,8) | VOUT programming inputs | Digital select lines (GND/VCC) setting output voltage per Table 1 - reduces BOM count and layout complexity |
| PGOOD (Pin 9) | Open-drain status indicator | Pulled low if VOUT drops >9% below setpoint; valid 3.5ms after enable - enables safe processor boot sequencing |
| MPP (Pin 10) | MPPT reference input | Accepts external resistor divider to set harvest source's optimal voltage point; disable by tying to VCC |
| SS1/SS2 (Pins 12,11) | VSTORE voltage range select | Digital control (GND/VCC) of VSTORE OV/UV thresholds - configures charge termination for specific battery chemistry |
| PRI (Pin 13) | Primary battery mode control | Tie to VCC to disable VSTORE charging (for non-rechargeable primaries); tie to GND to enable charging |
| ILIMSEL (Pin 14) | Peak current limit select | GND = 100mA (low-power mode); VCC = 600mA (high-current mode) - adapts to varying load profiles |
| RUN (Pin 15) | Enable & UVLO input | Two thresholds: 400mV (partial enable), 600mV (full switching) - supports custom undervoltage lockout via external divider |
| ENVSTR (Pin 16) | VSTORE enable control | Tie to VSTORE to activate backup path; grounding disables VSTORE - prevents unintended discharge during storage |
| GND (Pins 17,21) | Signal & thermal ground | Exposed pad (Pin 21) must be soldered to PCB ground plane for rated thermal performance and EMI reduction |
| VIN (Pin 18) | Main supply input | Accepts ultra-low-voltage harvest sources; requires ≥10µF input capacitance, plus 1µF ceramic near pin |
| SW1/SW2 (Pins 20,19) | Buck-boost switch terminals | Connect 10µH inductor between pins; drives synchronous four-switch power stage with defined RDS(ON) |
Key Features
| Feature | Design Value |
|---|---|
| Ultralow start-up voltage | 0.3V VIN start with VSTORE present - powers from weak ambient sources like indoor light or body heat |
| Zero-power shelf mode | <25nA VSTORE leakage - maintains backup charge for over a decade without maintenance |
| Dual-input PowerPath™ | Automatic seamless switchover between VIN and VSTORE - ensures uninterrupted operation during source interruption |
| Digitally programmable outputs | VOUT (1.8–5V) and VSTORE (2.7–4.1V) set via logic pins - eliminates trimming resistors and simplifies firmware |
| Integrated MPP control | 1.5µA reference current with external resistor programming - maximizes energy extraction from variable-output harvesters |
| Selectable peak current limit | 100mA or 600mA via ILIMSEL pin - balances efficiency vs. transient response for diverse sensor payloads |
Applications
| Wireless Sensor Node | Energy-Harvesting IoT Gateway |
|---|---|
Use Scenario: Battery-free temperature/humidity sensor deployed in HVAC ducts using thermal gradient harvesting. IC Role / Device Role / Timing Role: Primary power manager converting µW-level ΔT-generated voltage into stable 3.3V for MCU and BLE radio. Use Value: Enables 10+ year maintenance-free operation by starting from 0.3V and sustaining 1.6µA quiescent draw during sleep. | Use Scenario: Smart building gateway harvesting indoor light via small PV cell while backed by LiFePO₄ battery. IC Role / Device Role / Timing Role: Dual-source regulator maintaining 5V rail for Wi-Fi SoC and USB peripherals across day/night cycles. Use Value: Seamless transition between PV and battery ensures zero downtime; MPP tuning increases daily harvested energy by 15–25%. |
| Remote Industrial Monitor | Asset Tracking Beacon |
Use Scenario: Vibration-powered condition monitor on rotating machinery, transmitting data every 5 minutes. IC Role / Device Role / Timing Role: Buck-boost converter supplying 1.8V to ultra-low-power MCU and accelerometer, with VSTORE holding charge between bursts. Use Value: 0.85V start-up from piezo element and 300mA burst capability support short-duration high-power transmissions. | Use Scenario: GPS-enabled logistics tag powered by miniature solar cell, reporting location every 6 hours. IC Role / Device Role / Timing Role: Energy buffer managing intermittent solar input and delivering regulated 3.3V to GPS module and cellular modem. Use Value: Shelf-mode leakage <25nA preserves backup charge for >3 months in darkness; programmable VSTORE prevents overcharge of thin-film battery. |
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 | Higher 20V input rating; fixed 2.2V/3.3V VOUT; no VSTORE programming; 3µA IQ | Optimized for higher-voltage harvesters (e.g., thermoelectrics); lacks dual-battery arbitration | Choose for single-source, higher-VIN systems where VSTORE flexibility is unnecessary |
| BQ25504RGTT | TI part with 330mV start-up; 1.2µA IQ; integrated cold-start boost; no VSTORE voltage programming | Superior cold-start from sub-300mV sources; less flexible backup battery configuration | Prefer when minimum start voltage is critical and VSTORE voltage range is fixed by chemistry |
Compared with LTC3108EDE#TRPBF and BQ25504RGTT, the LTC3106IFE#TRPBF uniquely combines programmable VOUT/VSTORE, true dual-input PowerPath™ arbitration, and shelf-mode leakage under 25nA-making it optimal for long-life, multi-chemistry energy-harvesting systems requiring field adaptability.
Availability
LTC3106IFE#TRPBF is available at Aetrix Electronics and suitable for wireless sensor networks, industrial monitoring systems, and energy-harvesting IoT devices requiring stable component supply across extended product lifecycles.
Supply support for LTC3106IFE#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 for demanding applications.
The LTC3106 belongs to Linear's energy-harvesting PMIC product line, designed specifically to extract usable power from ultra-low-voltage ambient sources while supporting long-term autonomous operation with backup battery integration.
FAQ
What is the minimum input voltage required to start the LTC3106IFE#TRPBF?
The LTC3106IFE#TRPBF starts from 0.3V on VIN when a backup source (VSTORE) is present and enabled, or 0.85V when operating from VIN alone. This ultra-low start-up threshold is achieved through its two-stage RUN pin architecture-first enabling partial circuitry at 400mV, then full switching at 600mV-and makes the LTC3106IFE#TRPBF suitable for thermal, piezoelectric, and indoor-light energy harvesters.
How does the LTC3106IFE#TRPBF manage seamless switchover between primary and backup power sources?
The LTC3106IFE#TRPBF uses internal VBEST logic to continuously monitor VIN, VSTORE, VAUX, and VOUT, selecting the highest valid source as the system supply. When VIN drops below regulation, it automatically transfers load to VSTORE without output glitch or reset. Switchover is controlled by ENVSTR and PRI pin states, and the IC maintains regulation even when input voltages cross above or below VOUT-ensuring uninterrupted operation in the LTC3106IFE#TRPBF.
Can the LTC3106IFE#TRPBF charge a rechargeable battery connected to VSTORE?
Yes, the LTC3106IFE#TRPBF can trickle-charge a rechargeable battery on VSTORE when PRI is tied to GND and ENVSTR is connected to VSTORE. Charging is active only when surplus energy is available from VIN, and the VSTORE voltage range (2.7V–4.1V) is digitally programmed via SS1/SS2 pins to match battery chemistry. No external charging circuitry is needed-the LTC3106IFE#TRPBF handles voltage limiting and disconnect logic internally.
What is the purpose of the shelf mode in the LTC3106IFE#TRPBF, and how is it activated?
Shelf mode in the LTC3106IFE#TRPBF minimizes VSTORE leakage current to under 25nA, preserving backup battery charge during long-term storage. It activates automatically when the IC detects no load on VOUT and no switching activity-no external control is required. This feature ensures that a Li-ion cell connected to VSTORE retains >90% capacity after 10 years, making the LTC3106IFE#TRPBF ideal for infrastructure sensors deployed with no maintenance access.
How is the maximum power point (MPP) function configured on the LTC3106IFE#TRPBF?
The MPP function on the LTC3106IFE#TRPBF is configured by connecting a resistor from the MPP pin to GND. The MPP comparator uses a 1.5µA internal reference, so the resistor value sets the activation voltage (VMPP = IREF × R). For example, a 400kΩ resistor sets VMPP = 0.6V. To disable MPP, tie MPP directly to VCC. This allows precise tuning of harvest source loading without firmware changes in the LTC3106IFE#TRPBF.
LTC3106IFE#TRPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 20-TSSOP (0.173", 4.40mm Width) 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-TSSOP-EP
LTC3106IFE#TRPBF FAQ
1.How can I place an order for LTC3106IFE#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC3106IFE#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 LTC3106IFE#TRPBF reliable?
The price and inventory of LTC3106IFE#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC3106IFE#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC3106IFE#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC3106IFE#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC3106IFE#TRPBF?
LTC3106IFE#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC3106IFE#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 LTC3106IFE#TRPBF?
For technical support, including LTC3106IFE#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC3106IFE#TRPBF requirements.
6.How does Aetrix verify that LTC3106IFE#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC3106IFE#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 LTC3106IFE#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC3106IFE#TRPBF?
All LTC3106IFE#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC3106IFE#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 LTC3106IFE#TRPBF part is unused and in its original packaging.
Return procedure for LTC3106IFE#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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