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Analog Devices Inc. LTC3106EFE#PBF
- Part No.:
- LTC3106EFE#PBF
- Manufacturer:
- Analog Devices Inc.
- Package:
- 20-TSSOP (0.173", 4.40mm Width) Exposed Pad
- Datasheet:
-
LTC3106EFE#PBF.pdf
- Description:
- IC REG BUCK BOOST PROG 20TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:401
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Product details
Overview
LTC3106EFE#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 as low as 0.3V (with backup source), draws only 1.6µA quiescent current at no load, and supports digitally programmable VOUT and VSTORE voltages. It enables seamless switchover between primary and backup power in wireless sensor nodes.
For engineers reviewing the LTC3106EFE#PBF datasheet, LTC3106EFE#PBF pinout, LTC3106EFE#PBF application, or LTC3106EFE#PBF equivalent, key selection considerations include its 0.3V minimum start-up voltage with backup source, 1.6µA quiescent current, PowerPath control logic, MPP tracking capability, and 20-pin TSSOP package with exposed thermal pad.
Technical Context
The LTC3106EFE#PBF implements a synchronous buck-boost topology with four internal MOSFETs (A1/A2/D1/D2/B/C) and automatic source arbitration via VBEST selection logic. Its dual-input architecture dynamically selects between VIN and VSTORE based on voltage, availability, and user-configured thresholds (e.g., VSTORE UVLO = 1.73–1.826V).
It integrates digital voltage programming (OS1/OS2 for VOUT; SS1/SS2 for VSTORE range), analog MPP control (via external resistor to GND), and dual-mode RUN pin operation-enabling either accurate 600mV threshold switching or sub-600mV asynchronous start-up depending on external divider configuration.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Start-Up Voltage | 0.3V min with backup source enabled-supports direct connection to low-voltage harvesters like thermoelectric generators. |
| Quiescent Current | 1.6µA at no load-enables multi-year battery life in shelf-mode applications without depleting backup storage. |
| Output Current | 300mA max continuous-sufficient for powering microcontrollers, RF transceivers, and sensors in ultra-low-power nodes. |
| VOUT Programming | Digitally selectable 1.8V/2.2V/3.3V/5.0V via OS1/OS2 pins-eliminates external feedback resistors and reduces BOM count. |
| VSTORE Range | Programmable 2.7–4.1V via SS1/SS2-configures safe charge/discharge window for Li-ion, LiFePO₄, or supercapacitor backup sources. |
| MPP Control | Analog input (MPP pin) with 1.21–1.72µA sink current-enables precise impedance matching to maximize power extraction from PV or TEG sources. |
| Peak Current Limit | Selectable 60mA/100mA (ILIMSEL = LO/HI)-allows optimization of inductor size and efficiency for light vs. medium loads. |
Pinout & Package
The LTC3106EFE#PBF is housed in a 20-lead plastic TSSOP package (3mm × 6.5mm) with exposed thermal pad (Pin 21 = GND). Thermal resistance θJA = 48.6°C/W ensures stable operation up to 125°C junction temperature.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VSTORE (Pin 1) | Secondary supply input | Connects to rechargeable or primary backup battery; charging enabled only when PRI = GND and ENVSTR = VSTORE. |
| VCAP (Pin 2) | VSTORE isolation node | Decouples VSTORE from bulk capacitance during low-capacity battery use; tie to VSTORE for high-capacity sources. |
| VOUT (Pin 3) | Regulated output | Delivers programmable 1.8–5.0V; requires ≥22µF low-ESR output capacitor placed adjacent to pin. |
| VAUX (Pin 5) | Auxiliary internal rail | Powers internal circuitry only; requires ≥2.2µF ceramic decoupling; maintains 10:1 ratio vs. VOUT capacitor. |
| OS1/OS2 (Pins 7,8) | VOUT programming inputs | Digital select lines (GND/VCC) setting output voltage per Table 1-no external resistors needed. |
| SS1/SS2 (Pins 12,11) | VSTORE voltage range select | Configure upper/lower VSTORE thresholds (e.g., 2.70–4.10V) only when PRI = GND. |
| PRI (Pin 13) | Primary battery mode enable | Tie to VCC to disable VSTORE charging and treat backup as non-rechargeable; tie to GND to enable trickle charge. |
| ILIMSEL (Pin 14) | Peak current limit select | Set low (60mA) or high (100mA) inductor current limit-directly impacts inductor sizing and light-load efficiency. |
| RUN (Pin 15) | Enable & UVLO threshold control | Accurate 600mV enable threshold with 100mV hysteresis; tie to VIN or external divider for custom undervoltage lockout. |
| ENVSTR (Pin 16) | VSTORE enable input | Must be tied to VSTORE to activate backup source path; grounding disables VSTORE entirely. |
| GND (Pins 17,21) | Power & thermal reference | Pin 21 is exposed thermal pad-must be soldered to PCB ground plane for rated θJA and thermal shutdown protection. |
| VIN (Pin 18) | Main input supply | Accepts 0.25–5.1V; requires ≥10µF bulk + 1µF ceramic decoupling; start-up possible down to 0.3V with backup active. |
| SW1/SW2 (Pins 20,19) | Buck-boost switch terminals | Connect 10µH inductor between these pins; internal synchronous MOSFETs handle both buck and boost phases. |
| PGOOD (Pin 9) | Output voltage monitor | Open-drain signal asserting low when VOUT drops >9% below target-provides system-level power-good signaling. |
| MPP (Pin 10) | Maximum Power Point setpoint | External resistor to GND sets MPP comparator trip point; connect to VCC to disable MPP function. |
Key Features
| Feature | Design Value |
|---|---|
| Zero-power Shelf Mode | VSTORE leakage <25nA preserves multi-year backup battery charge when system is idle or unpowered. |
| Automatic PowerPath Management | Seamless, glitch-free switchover between VIN and VSTORE without external diodes or controllers. |
| Dual-Mode RUN Pin | Supports both accurate 600mV enable threshold and sub-600mV asynchronous start-up for ultra-low-VIN harvesting. |
| Integrated Trickle Charger | Programmable VSTORE charge current (60mA peak) with configurable upper/lower voltage limits via SS1/SS2. |
| Burst Mode® Operation | Maintains high efficiency (<75%) down to 10µA load-critical for intermittent-sensing applications. |
| Thermal Shutdown Protection | Activates at TJ = 125°C with automatic recovery-ensures reliability under sustained high ambient or overload conditions. |
Applications
| Wireless Sensor Networks | Energy Harvesting Systems |
|---|---|
Use Scenario: Batteryless environmental sensor node powered by thermoelectric generator (TEG) with Li-ion backup. IC Role / Device Role / Timing Role: Buck-boost regulator and PowerPath manager providing stable 3.3V to MCU and BLE radio while managing TEG-to-battery energy flow. Use Value: Enables operation from 0.3V TEG output; 1.6µA quiescent current extends shelf life; MPP control maximizes harvested power yield. | Use Scenario: Solar-powered structural health monitor using amorphous PV cell and supercapacitor storage. IC Role / Device Role / Timing Role: Dual-input regulator converting variable PV voltage (0.5–4.5V) to fixed 5V output while charging supercapacitor via VSTORE path. Use Value: 0.85V start-up from PV alone; programmable VSTORE range prevents overcharge; PGOOD signals readiness to transmit data. |
| Home Automation Sensors | Remote Industrial Monitoring |
Use Scenario: Wireless occupancy sensor with motion-triggered wake-up and coin-cell backup. IC Role / Device Role / Timing Role: Power manager delivering 1.8V to ultra-low-power MCU and IR sensor, switching to coin cell when ambient light is insufficient. Use Value: Sub-1V start-up allows immediate operation after installation; Shelf Mode preserves coin-cell capacity for >5 years. | Use Scenario: Corrosion-resistant pipeline monitor powered by vibration harvester and rechargeable LiFePO₄ battery. IC Role / Device Role / Timing Role: Regulator supplying 3.3V to LoRaWAN transceiver and MEMS accelerometer, with VSTORE charging controlled by SS1/SS2 thresholds. Use Value: 125°C operating range suits harsh environments; accurate RUN threshold ensures reliable cold-start in sub-zero conditions. |
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#PBF | Optimized for lower input voltages (20mV start-up), no VSTORE charging, single-input only, 200mA output. | Suitable for pure energy harvesting without backup battery; lacks PowerPath arbitration and VSTORE management. | Select when system uses only one harvester source and requires lowest possible start-up voltage. |
| BQ25504RGTT | TI device with 330mV start-up, integrated cold-start circuit, 200mA output, different VOUT programming (resistor-based), no MPP analog input. | Designed for solar/TEG with built-in cold-start boost; less flexible VSTORE control and no digital VOUT selection. | Choose for cost-sensitive designs where MPP precision and dual-source arbitration are secondary to cold-start robustness. |
Compared with LTC3108EDE#PBF and BQ25504RGTT, the LTC3106EFE#PBF uniquely combines dual-input PowerPath, digital VOUT/VSTORE programming, and MPP analog control in a single 20-pin TSSOP-making it optimal for systems requiring intelligent backup battery integration and field-programmable voltage ranges.
Availability
LTC3106EFE#PBF is available at Aetrix Electronics and suitable for wireless sensor networks, energy harvesting deployments, and remote industrial monitoring requiring stable component supply across extended product lifecycles.
Supply support for LTC3106EFE#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 all Linear power management ICs.
The LTC3106 belongs to Linear's ultralow-power energy harvesting PMIC family, designed specifically for batteryless or dual-source systems where microwatt-level quiescent current and sub-1V start-up are mandatory.
FAQ
What is the minimum input voltage required for the LTC3106EFE#PBF to start up when a backup source is present?
The LTC3106EFE#PBF achieves no-load start-up from VIN as low as 0.3V when ENVSTR is tied to VSTORE and a functional backup source is connected. This specification is verified across –40°C to 125°C and enables direct interfacing with low-output thermoelectric generators. The 0.3V threshold assumes PRI = GND and proper RUN pin configuration per the datasheet's Accurate RUN flowchart.
How does the LTC3106EFE#PBF manage power switchover between VIN and VSTORE without external components?
The LTC3106EFE#PBF performs automatic PowerPath management using internal VBEST logic that continuously compares VIN, VSTORE, VAUX, and VOUT. When VIN drops below VSTORE and ENVSTR is asserted, the IC seamlessly transfers load to VSTORE within microseconds-no external MOSFETs, diodes, or control circuitry required. Switchover behavior is deterministic and validated in typical application circuits (e.g., Figure TA01a).
Can the LTC3106EFE#PBF charge a lithium iron phosphate (LiFePO₄) battery connected to VSTORE?
Yes-the LTC3106EFE#PBF supports LiFePO₄ charging when PRI = GND and SS1/SS2 are configured for a VSTORE upper threshold of 3.6–3.7V (e.g., SS1 = VCC, SS2 = GND yields 2.91–3.08V OV). Charging current is limited to 60mA or 100mA depending on ILIMSEL state, and VSTORE UVLO (1.73–1.826V) prevents deep discharge. Always verify cell-specific voltage limits against Table 2 in the datasheet.
What is the purpose of the VCAP pin on the LTC3106EFE#PBF, and how should it be connected?
The VCAP pin isolates the VSTORE supply from bulk decoupling capacitance during low-capacity battery use. For high-capacity sources (e.g., >100mAh Li-ion), tie VCAP directly to VSTORE. For low-capacity cells (e.g., coin cells), connect VCAP to GND to prevent excessive discharge through the capacitor ESR. This pin is not used for regulation-it solely controls internal isolation FET (D2) conduction.
Does the LTC3106EFE#PBF require external compensation components for stability?
No-the LTC3106EFE#PBF uses internal compensation optimized for the recommended 10µH inductor and standard output capacitors (e.g., 47µF–470µF). Stability is guaranteed across all VOUT settings, input ranges, and load conditions specified in the datasheet. External compensation is neither required nor supported; adding it may destabilize regulation.
LTC3106EFE#PBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 20-TSSOP (0.173", 4.40mm Width) 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-TSSOP-EP
LTC3106EFE#PBF FAQ
1.How can I place an order for LTC3106EFE#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC3106EFE#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 LTC3106EFE#PBF reliable?
The price and inventory of LTC3106EFE#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC3106EFE#PBF is usually 5 days.
3.What payment methods are accepted for LTC3106EFE#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC3106EFE#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC3106EFE#PBF?
LTC3106EFE#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC3106EFE#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 LTC3106EFE#PBF?
For technical support, including LTC3106EFE#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC3106EFE#PBF requirements.
6.How does Aetrix verify that LTC3106EFE#PBF is sourced from the original manufacturer or authorized distributors?
All LTC3106EFE#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 LTC3106EFE#PBF meets industry standards.
7.What is the process for return or replacement of LTC3106EFE#PBF?
All LTC3106EFE#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC3106EFE#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 LTC3106EFE#PBF part is unused and in its original packaging.
Return procedure for LTC3106EFE#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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