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Analog Devices Inc. LTC3107EDD#PBF
- Part No.:
- LTC3107EDD#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Special Purpose Regulators
- Package:
- 10-WFDFN Exposed Pad
- Datasheet:
-
LTC3107EDD#PBF.pdf
- Description:
- IC REG CONV ENERGY 3OUT 10DFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,238
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Product details
Overview
LTC3107EDD#PBF from Analog Devices (formerly Linear Technology) is an ultra-low-voltage energy harvesting DC/DC converter and battery life extender IC designed for wireless sensor nodes powered by primary batteries. It operates from input voltages as low as 20mV, delivers a VOUT that tracks the primary battery voltage (2.0V–4.0V), provides a regulated 2.2V LDO output, and features an 80nA quiescent current from battery during energy harvesting. It enables thermoelectric generator (TEG)-powered industrial sensing systems with zero net battery drain under sufficient harvest conditions.
For engineers reviewing the LTC3107EDD#PBF datasheet, LTC3107EDD#PBF pinout, LTC3107EDD#PBF application, or LTC3107EDD#PBF equivalent, this page delivers verified technical context, exact pin functions, real-world energy harvesting performance thresholds, battery-tracking behavior, and validated alternative options for thermal power management in low-power IoT edge devices.
Technical Context
The LTC3107EDD#PBF integrates a resonant step-up oscillator driving an external transformer to boost sub-50mV TEG inputs, a synchronous rectifier with VAUX clamping at 4.3V, a VOUT regulator that hysteretically tracks VBAT (–30mV when harvesting, –230mV otherwise), and a 2.2V/2mA LDO powered from the higher of VOUT or VAUX. Its BAT_OFF pin provides digital indication of battery usage via a 1MΩ internal pull-up to VOUT.
It implements short-circuit protection on all outputs, uses an internal 1.2V reference activated above 1.9V VAUX, and supports optional VSTORE capacitor charging for load transient ride-through. The IC transitions seamlessly between harvested and battery power without external control, minimizing system-level complexity in battery-assisted energy harvesting architectures.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Min Start-Up Voltage | 20mV - enables operation from tiny temperature gradients (e.g., ΔT ≥ 1°C across TEGs) |
| VOUT Tracking Offset | –30mV vs VBAT (harvesting active); –230mV vs VBAT (battery-only mode) - ensures seamless switchover without voltage discontinuity |
| VBAT Quiescent Current | 80nA (harvesting active); 6µA (no harvesting) - extends primary battery life to multi-year operation in duty-cycled sensors |
| LDO Output | 2.2V ±34mV at 0.5mA - powers microcontrollers or RF transceivers directly without external regulation |
| VAUX Clamp Voltage | 4.3V typical - limits overvoltage on internal circuitry and defines maximum storage capacitor charge level |
| Operating Temp Range | –40°C to +125°C - qualified for industrial and automotive under-hood sensing environments |
| Package | 10-lead 3mm × 3mm DFN with exposed thermal pad - enables high-power-density layout and efficient heat dissipation in compact modules |
Pinout & Package
Package: 10-lead (3mm × 3mm) plastic DFN with exposed thermal pad (Pin 11), requiring soldering to PCB ground plane for thermal and electrical integrity (θJC = 5.5°C/W).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| SW (Pin 10) | Internal N-Channel MOSFET Drain | Connects to primary winding of external step-up transformer; switches at 10kHz–100kHz resonance |
| C2 (Pin 9) | Gate Drive Input | Connects to secondary winding via coupling capacitor; drives internal synchronous rectifier |
| C1 (Pin 8) | Charge Pump Input | Connects to secondary winding; feeds rectified current into VAUX node |
| BAT_OFF (Pin 7) | Digital Battery Usage Indicator | Open-drain output pulled up to VOUT; logic low indicates battery assist is active |
| GND (Pins 6 & 11) | Power and Thermal Ground | Exposed pad (Pin 11) must be soldered to PCB ground plane for thermal management and signal return |
| VLDO (Pin 5) | 2.2V LDO Output | Powered from higher of VOUT or VAUX; requires ≥2.2µF ceramic decoupling |
| VBAT (Pin 4) | Primary Battery Reference & Source | Accepts 2.0V–4.0V primary cells; used for startup, VOUT reference, and backup power |
| VOUT (Pin 3) | Main Regulated Output | Tracks VBAT with –30mV/–230mV offset; requires ≥47µF bulk capacitor for load transient support |
| VSTORE (Pin 2) | Optional Energy Storage Output | Charges external capacitor up to 4.3V; discharges into VOUT before battery draw occurs |
| VAUX (Pin 1) | Internal Rectifier Output & VCC | Bypassed with ≥10µF capacitor; powers internal circuitry and clamps at 4.3V |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low 20mV start-up | Enables energy harvesting from <1°C thermal gradients using standard TEGs without pre-bias or auxiliary power |
| VOUT battery-tracking regulation | Eliminates need for system redesign when retrofitting energy harvesting into existing battery-powered sensor platforms |
| Integrated 2.2V LDO | Reduces BOM count by powering MCU cores or radios directly-no external LDO required |
| BAT_OFF usage indicator | Provides real-time firmware visibility into battery engagement state for predictive maintenance and power diagnostics |
| VSTORE capacitor support | Allows Farad-range supercapacitors to absorb burst loads and extend battery life beyond theoretical shelf-life limits |
Applications
| Industrial Wireless Sensing | Remote HVAC Monitoring |
|---|---|
Use Scenario: Temperature, humidity, and vibration sensing in factory-floor machinery with no access to grid power. IC Role / Device Role / Timing Role: Primary power manager that harvests waste heat from motors/bearings via TEGs and extends Li-SOCl₂ battery life from 2 to >10 years. Use Value: Eliminates scheduled battery replacement labor and downtime; enables continuous condition monitoring without infrastructure dependency. |
Use Scenario: Wireless thermostats and duct sensors in commercial buildings using ambient temperature differentials. IC Role / Device Role / Timing Role: Dual-source power controller that prioritizes harvested energy from HVAC surface ΔT while maintaining precise 2.2V rail for Zigbee radio timing stability. Use Value: Sustains 10-year operation on a single CR2032 cell even with daily data transmission bursts. |
| Smart Metering (AMR) | Predictive Maintenance Nodes |
Use Scenario: Battery-backed gas/water meters installed in underground utility vaults with minimal thermal gradient. IC Role / Device Role / Timing Role: Ultra-low-quiescent (80nA) harvester that leverages small ΔT between vault air and soil to defer battery depletion during long idle periods. Use Value: Achieves >15-year field life by reducing average battery current to sub-nanoampere levels during 99.9% of operational time. |
Use Scenario: Vibration and acoustic emission sensors on rotating equipment where heat from bearing friction provides consistent harvest source. IC Role / Device Role / Timing Role: Intelligent power arbitrator that uses VSTORE to supply 50ms RF transmit pulses without triggering battery assist or voltage droop. Use Value: Guarantees deterministic 2.2V LDO output for ADC sampling clocks during high-current events, preserving measurement accuracy. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar ultra-low-voltage energy harvesting applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX17710G+T | Requires ≥80mV start-up; integrates rechargeable microbattery charger but lacks VOUT tracking | Best suited for systems with integrated thin-film batteries-not ideal for primary-cell-only designs | Select MAX17710G+T only if microbattery charging is required and input sources exceed 80mV |
| BQ25504RGTT | Starts at 330mV; includes MPPT algorithm but no LDO output or BAT_OFF indicator | Targets solar or piezoelectric sources-not optimized for sub-50mV TEGs or battery-tracking use cases | Choose BQ25504RGTT for higher-voltage ambient sources where MPPT adds value, not for thermal harvesting |
Compared with MAX17710G+T and BQ25504RGTT, the LTC3107EDD#PBF uniquely delivers 20mV start-up, VOUT tracking, integrated 2.2V LDO, and battery usage telemetry-making it the only option capable of drop-in integration into legacy battery-powered sensor designs with minimal hardware change.
Availability
LTC3107EDD#PBF is available at Aetrix Electronics and suitable for industrial wireless sensing, remote HVAC monitoring, and smart metering applications requiring stable component supply, long-lifecycle assurance, and guaranteed lead-free compliance.
Supply support for LTC3107EDD#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 product support, documentation, and manufacturing continuity for the LTC portfolio.
The LTC3107EDD#PBF belongs to Linear's ultra-low-power energy harvesting IC family, engineered specifically to eliminate battery dependency in maintenance-free wireless sensor networks operating from thermal, vibration, or ambient RF sources.
FAQ
What is the minimum input voltage required for LTC3107EDD#PBF to start switching?
The LTC3107EDD#PBF starts switching at 20mV typical when using a 1:100 transformer turns ratio. This specification is confirmed in the Electrical Characteristics table (Page 3) under "Minimum Harvester Start-Up Voltage." Below this threshold, the internal oscillator remains inactive and no regulation occurs. The actual start-up voltage may rise slightly with lower transformer ratios or higher source impedance.
How does LTC3107EDD#PBF manage power source arbitration between harvested energy and the primary battery?
The LTC3107EDD#PBF automatically prioritizes harvested energy: when VAUX exceeds VBAT, VOUT is regulated to VBAT –30mV and battery current drops to 80nA. When harvested energy is insufficient, VOUT falls to VBAT –230mV and the internal switch draws from VBAT. BAT_OFF goes low to signal battery engagement. This arbitration requires no external control or firmware intervention.
Can LTC3107EDD#PBF power a microcontroller directly, and what are the voltage requirements?
Yes - the LTC3107EDD#PBF provides a dedicated 2.2V LDO (VLDO) output rated for up to 2mA with ±34mV accuracy at 0.5mA load. It is powered from the higher of VOUT or VAUX and requires a minimum 2.2µF ceramic capacitor. For MCUs requiring >2mA or tighter regulation, an external LDO should be used downstream of VOUT.
What is the purpose of the VSTORE pin on LTC3107EDD#PBF, and how large a capacitor can be connected?
VSTORE on the LTC3107EDD#PBF charges an optional external storage capacitor up to 4.3V to supply transient loads before drawing from the battery. Capacitor values range from hundreds of µF to multiple Farads (e.g., supercapacitors). Charging time depends on available harvest power and load - a 1300µF capacitor achieves 37-second holdup at 50µA per Figure G24 in the datasheet.
Is LTC3107EDD#PBF compatible with common thermoelectric generators (TEGs), and what transformer ratio is recommended?
Yes - the LTC3107EDD#PBF is optimized for TEGs with 1Ω–10Ω internal resistance. A 1:100 transformer ratio is recommended for inputs ≤50mV (e.g., ΔT < 5°C), while 1:50 or 1:20 ratios suit higher-voltage sources. The datasheet confirms compatibility with CUI CP20151 TEG in Typical Application TA01a, achieving >100,000% battery life extension at 45°C surface temperature.
LTC3107EDD#PBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 10-WFDFN Exposed Pad
- Packaging:
- Tube
- Product Status:
- Obsolete
- Applications:
- Converter, Energy Harvesting
- Voltage - Input:
- 0.02V ~ 0.5V
- Number of Outputs:
- 3
- Voltage - Output:
- Multiple
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 10-DFN (3x3)
LTC3107EDD#PBF FAQ
1.How can I place an order for LTC3107EDD#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC3107EDD#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 LTC3107EDD#PBF reliable?
The price and inventory of LTC3107EDD#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC3107EDD#PBF is usually 5 days.
3.What payment methods are accepted for LTC3107EDD#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC3107EDD#PBF transactions.
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4.How is shipping managed for LTC3107EDD#PBF?
LTC3107EDD#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC3107EDD#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 LTC3107EDD#PBF?
For technical support, including LTC3107EDD#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC3107EDD#PBF requirements.
6.How does Aetrix verify that LTC3107EDD#PBF is sourced from the original manufacturer or authorized distributors?
All LTC3107EDD#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 LTC3107EDD#PBF meets industry standards.
7.What is the process for return or replacement of LTC3107EDD#PBF?
All LTC3107EDD#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC3107EDD#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 LTC3107EDD#PBF part is unused and in its original packaging.
Return procedure for LTC3107EDD#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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