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Analog Devices Inc. LTC3106IFE#PBF
- Part No.:
- LTC3106IFE#PBF
- Manufacturer:
- Analog Devices Inc.
- Package:
- 20-TSSOP (0.173", 4.40mm Width) Exposed Pad
- Datasheet:
-
LTC3106IFE#PBF.pdf
- Description:
- IC REG BUCK BOOST PROG 20TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,190
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Product details
Overview
LTC3106IFE#PBF from Analog Devices (formerly Linear Technology) is an ultralow-voltage, 300mA buck-boost DC/DC converter with integrated PowerPath™ management, designed for energy harvesting and dual-source systems. It starts up from as low as 300mV when a backup source is present, delivers regulated output up to 5V, draws only 1.6µA quiescent current, and supports digitally programmable VOUT and VSTORE voltages - enabling use in wireless sensor nodes powered by solar cells or thermoelectric generators.
For engineers reviewing the LTC3106IFE#PBF datasheet, LTC3106IFE#PBF pinout, LTC3106IFE#PBF application, or LTC3106IFE#PBF equivalent, key selection criteria include its sub-1V startup capability, dual-input seamless switchover, shelf-mode battery preservation, MPP control for harvesting optimization, and 20-pin TSSOP package compatibility with industrial temperature range (–40°C to 125°C).
Technical Context
The LTC3106IFE#PBF implements a synchronous buck-boost topology with four internal MOSFETs (A1/A2/D1/D2/B/C) and adaptive gate drive to maintain regulation across VIN < VOUT, VIN > VOUT, and VIN ≈ VOUT conditions. Its state machine autonomously selects the optimal power source (VIN or VSTORE) based on voltage, load demand, and ENVSTR/PRI logic states.
It integrates analog comparators for accurate RUN threshold (600mV ±15mV), PGOOD monitoring (–9% hysteresis), and MPP setpoint control (1.5µA reference current), while digital programming via OS1/OS2 and SS1/SS2 pins configures output and storage voltages without external resistors.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Startup Voltage (VIN) | 300mV min with VSTORE present - enables operation directly from weak ambient energy sources like thermoelectric or piezoelectric harvesters. |
| Quiescent Current | 1.6µA at no load - preserves battery life in long-idle wireless sensor deployments. |
| Output Current | 300mA max - sufficient to power microcontrollers, RF transceivers (e.g., BLE, LoRa), and sensors in ultra-low-power edge nodes. |
| VOUT Range | 1.8V / 2.2V / 3.3V / 5.0V - digitally selectable via OS1/OS2 pins; eliminates need for external feedback resistors. |
| VSTORE Range | 2.7V–4.1V (4 settings via SS1/SS2) - configurable charge/discharge thresholds for Li-ion, LiFePO₄, or primary batteries. |
| Peak Current Limit | 60mA / 100mA (ILIMSEL = LO/HI) - user-selectable to match inductor and source impedance in harvesting applications. |
| Shelf Mode Leakage | 0.1–25nA on VSTORE - prevents self-discharge during multi-year storage of backup batteries. |
Pinout & Package
The LTC3106IFE#PBF is housed in a 20-lead plastic TSSOP package (JEDEC MO-153, 6.5mm × 4.4mm × 1.1mm), with exposed thermal pad (Pin 21) requiring PCB soldering for thermal performance (θJA = 48.6°C/W). Pin functions are identical between QFN and TSSOP variants per datasheet.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VSTORE (Pin 1) | Secondary input supply rail | Connects to rechargeable or primary backup battery; charging enabled only when PRI = GND and ENVSTR = VSTORE. |
| VCAP (Pin 2) | VSTORE isolation node | Tie to VSTORE for high-capacity batteries; decouple with ≥47µF capacitor to handle peak VSTORE discharge current. |
| VOUT (Pin 3) | Regulated output voltage | Programmable 1.8V/2.2V/3.3V/5V; requires ≥22µF low-ESR output capacitor placed adjacent to pin. |
| NC (Pin 4) | No-connect terminal | Not internally bonded; may be left floating or tied to GND for mechanical stability. |
| VAUX (Pin 5) | Auxiliary internal supply | Generated rail powering internal circuitry; requires ≥2.2µF ceramic capacitor; VOUT:VAUX capacitance ratio ≥10:1. |
| VCC (Pin 6) | Internal bias supply | Not for external loading; decoupled with 0.1µF ceramic capacitor close to pin. |
| OS1/OS2 (Pins 7,8) | VOUT programming inputs | Digital select lines (GND/VCC) setting output voltage per Table 1; no pull-ups required. |
| PGOOD (Pin 9) | Open-drain status indicator | Pulled low if VOUT drops >9% below target; valid 3.5ms after enable; requires external pull-up. |
| MPP (Pin 10) | Maximum Power Point setpoint | Resistor-to-GND sets activation voltage; tie to VCC to disable MPP function entirely. |
| SS1/SS2 (Pins 12,11) | VSTORE voltage range select | Digital inputs configuring VSTORE OV/UV thresholds (2.7–4.1V); ignored if PRI = VCC. |
| PRI (Pin 13) | Primary battery mode control | Tie to VCC for non-rechargeable battery use (disables VSTORE charging); tie to GND for rechargeable backup. |
| ILIMSEL (Pin 14) | Peak current limit selection | GND = 60mA limit (low-power harvesting); VCC = 100mA limit (higher load support). |
| RUN (Pin 15) | Enable & UVLO threshold input | Enables IC above 400mV; accurate 600mV threshold with 100mV hysteresis for precise VIN undervoltage detection. |
| ENVSTR (Pin 16) | VSTORE enable control | Tie to VSTORE to activate backup source; grounding disables VSTORE path entirely. |
| GND (Pins 17,21) | Power and signal ground | Pins 17 and 21 (exposed pad) must both connect to low-impedance PCB ground plane for electrical integrity and thermal dissipation. |
| VIN (Pin 18) | Main input supply | Accepts 0.25–5.1V; requires ≥10µF bulk + 1µF ceramic decoupling; start-up possible down to 300mV with VSTORE present. |
| SW1/SW2 (Pins 20,19) | Buck-boost power switches | Connect external 10µH inductor between these pins; internal synchronous FETs handle all switching phases. |
Key Features
| Feature | Design Value |
|---|---|
| Ultralow 300mV VIN startup with VSTORE | Enables direct interface to sub-1V ambient energy harvesters (e.g., thermoelectric modules) without pre-boost stages. |
| Dual-input PowerPath™ management | Automatic, glitch-free switchover between VIN and VSTORE without external controllers or diodes. |
| Digitally programmable VOUT/VSTORE | Eliminates external resistor dividers and reduces BOM count; supports 4 output voltages and 4 VSTORE charge ranges. |
| Zero-power Shelf Mode | Reduces VSTORE leakage to ≤25nA, preserving charge for >10 years in storage - critical for maintenance-free IoT deployments. |
| Integrated MPP control | On-chip comparator with 1.5µA reference allows simple resistor-based MPPT for solar or thermal harvesters. |
| Selectable 60mA/100mA peak current limit | Optimizes inductor size and efficiency for either ultra-low-power (e.g., sub-10µW sensors) or higher-load (e.g., sub-GHz RF) applications. |
Applications
| Wireless Sensor Networks | Energy Harvesting Systems |
|---|---|
Use Scenario: Battery-less temperature/humidity node powered by indoor light or thermal gradient. IC Role / Device Role / Timing Role: Primary power management IC providing regulated 3.3V to MCU and BLE radio while harvesting from miniature solar cell. Use Value: 1.6µA quiescent current extends operational lifetime beyond 10 years on a single coin-cell backup; 300mV startup enables operation under dim lighting. | Use Scenario: Industrial vibration monitor harvesting energy from rotating machinery using piezoelectric transducer. IC Role / Device Role / Timing Role: Buck-boost regulator with MPP control maximizing power extraction from high-impedance AC source rectified to low-V DC. Use Value: Programmable VSTORE (3.6V) and shelf mode preserve charge during idle periods; 100mA peak limit supports short-duration 2.4GHz transmission bursts. |
| Remote Environmental Sensors | Building Automation Nodes |
Use Scenario: Outdoor soil moisture sensor powered by small solar panel with seasonal shading. IC Role / Device Role / Timing Role: Dual-input converter managing solar input (VIN) and LiFePO₄ backup (VSTORE), with automatic switchover during night/cloud cover. Use Value: 4.1V VSTORE upper threshold prevents overcharge; 2.7V lower threshold avoids deep discharge; 5.0V VOUT option powers legacy analog sensors. | Use Scenario: Occupancy detector in smart office ceiling tile, harvesting from ambient light and backed by primary lithium battery. IC Role / Device Role / Timing Role: Power manager with PRI = VCC disabling charging, ensuring primary battery longevity while delivering stable 1.8V to ultra-low-power motion ASIC. Use Value: Accurate 600mV RUN threshold ensures reliable wake-up from harvested energy; PGOOD signal validates power before MCU initialization. |
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 | Lower 20mV startup (20mV typical), fixed 2.2V/3.3V VOUT, no VSTORE programming; optimized for thermoelectric generators only. | Best for ultra-low ΔT thermal harvesting where <300mV input is guaranteed; lacks dual-source flexibility and programmable backup voltage. | Select LTC3108EDE#PBF only when input voltage never exceeds 500mV and backup source is unnecessary. |
| BQ25504RGTT | TI part with 330mV startup, integrated cold-start circuit, but fixed 1.8V/2.5V/3.0V VOUT and no VSTORE switchover logic. | Suitable for solar-powered wearables with single-cell Li-ion backup; lacks PowerPath™ autonomy and shelf-mode leakage spec. | Choose BQ25504RGTT when cost sensitivity outweighs need for programmable VSTORE and <10nA shelf leakage. |
Compared with LTC3108EDE#PBF and BQ25504RGTT, the LTC3106IFE#PBF uniquely combines sub-1V dual-input startup, full VOUT/VSTORE digital programmability, and verified ≤25nA shelf-mode leakage - making it the only option supporting multi-year deployment in unattended, dual-source energy harvesting nodes.
Availability
LTC3106IFE#PBF is available at Aetrix Electronics and suitable for wireless sensor networks, energy harvesting systems, and remote environmental monitoring requiring stable component supply across extended product lifecycles.
Supply support for LTC3106IFE#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, including precision power management ICs for demanding industrial and IoT applications.
The LTC3106IFE#PBF belongs to Linear's ultralow-power energy harvesting PMIC family, engineered specifically for autonomous, battery-free or battery-assisted sensing nodes where microwatt-level efficiency and multi-year reliability are mandatory.
FAQ
What is the minimum input voltage required for LTC3106IFE#PBF to start up when a backup source is connected?
The LTC3106IFE#PBF achieves no-load startup from as low as 300mV on VIN when VSTORE is present and ENVSTR is asserted. This is confirmed in the Electrical Characteristics table (VIN Minimum No-Load Start-Up Power = 12µW at 300mV) and validated in Typical Performance Characteristic Figure G23. The 300mV threshold enables direct interfacing with low-output thermoelectric or piezoelectric harvesters without auxiliary boost circuitry.
How does the LTC3106IFE#PBF manage seamless switchover between main and backup power sources?
The LTC3106IFE#PBF uses an internal state machine and VBEST comparator to continuously monitor VIN, VSTORE, and VAUX. When VIN falls below the regulated VOUT level and ENVSTR is active, it automatically transitions load to VSTORE within microseconds without output dropout - as demonstrated in Figure G39 (VSTORE-to-VIN switchover waveform). No external circuitry or firmware control is required, fulfilling the PowerPath™ management function.
Can the LTC3106IFE#PBF charge a rechargeable battery connected to VSTORE while simultaneously powering the system?
Yes, the LTC3106IFE#PBF can trickle-charge a rechargeable battery on VSTORE while delivering regulated power to VOUT, provided PRI is tied to GND and ENVSTR is connected to VSTORE. Charging occurs only when surplus energy is available from VIN, and the VSTORE voltage is controlled within user-programmed OV/UV limits (e.g., 2.70V–4.00V) set by SS1/SS2 pins - as specified in the Electrical Characteristics table under "VSTORE Operating Voltage".
What is the purpose of the Shelf Mode feature in the LTC3106IFE#PBF, and how is it activated?
Shelf Mode in the LTC3106IFE#PBF minimizes VSTORE leakage current to ≤25nA to preserve backup battery charge during long-term storage. It activates automatically when the device is in shutdown (RUN = 0V) and ENVSTR = 0V, isolating VSTORE from internal circuitry. This is measured in the Electrical Characteristics table under "Shelf Mode VSTORE Leakage Current" and is critical for IoT devices deployed in inaccessible locations for >5 years.
Does the LTC3106IFE#PBF support maximum power point tracking (MPPT), and how is it implemented?
Yes, the LTC3106IFE#PBF includes hardware-based MPPT via the MPP pin, which accepts a resistor divider from VIN to GND to set the operating point. The internal 1.5µA current source (specified in Electrical Characteristics) develops a voltage at MPP that triggers switchover when VIN reaches the MPP threshold. Connecting MPP directly to VCC disables the function. This analog implementation avoids software complexity and latency inherent in digital MPPT algorithms.
LTC3106IFE#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
LTC3106IFE#PBF FAQ
1.How can I place an order for LTC3106IFE#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC3106IFE#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 LTC3106IFE#PBF reliable?
The price and inventory of LTC3106IFE#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC3106IFE#PBF is usually 5 days.
3.What payment methods are accepted for LTC3106IFE#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC3106IFE#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC3106IFE#PBF?
LTC3106IFE#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC3106IFE#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 LTC3106IFE#PBF?
For technical support, including LTC3106IFE#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC3106IFE#PBF requirements.
6.How does Aetrix verify that LTC3106IFE#PBF is sourced from the original manufacturer or authorized distributors?
All LTC3106IFE#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 LTC3106IFE#PBF meets industry standards.
7.What is the process for return or replacement of LTC3106IFE#PBF?
All LTC3106IFE#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC3106IFE#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 LTC3106IFE#PBF part is unused and in its original packaging.
Return procedure for LTC3106IFE#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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