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Analog Devices Inc. LTC3130IUDC#PBF
- Part No.:
- LTC3130IUDC#PBF
- Manufacturer:
- Analog Devices Inc.
- Package:
- 20-WFQFN Exposed Pad
- Datasheet:
-
LTC3130IUDC#PBF.pdf
- Description:
- IC REG BUCK BST ADJ 600MA 20QFN
- Quantity:
- Payment:
- Shipping:
Inventory:114
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Product details
Overview
LTC3130IUDC#PBF from Analog Devices (formerly Linear Technology) is a monolithic, current-mode buck-boost DC/DC converter optimized for ultra-low-power, wide-input applications. It delivers up to 600mA output current with input voltage range of 2.4V to 25V (or down to 0.6V with EXTVCC), adjustable 1V–25V output, 1.2MHz ultralow-noise PWM operation, and only 1.6µA quiescent current in Burst Mode - enabling long-life battery operation in solar-powered sensors and portable military radios.
For engineers reviewing the LTC3130IUDC#PBF datasheet, LTC3130IUDC#PBF pinout, LTC3130IUDC#PBF application, or LTC3130IUDC#PBF equivalent, key selection criteria include its MPPC capability for photovoltaic harvesting, pin-selectable Burst Mode vs. fixed-frequency PWM, accurate RUN threshold (1.05V typ), power-good indicator, and thermally enhanced 20-lead 3mm × 4mm QFN package with exposed GND pad.
Technical Context
The LTC3130IUDC#PBF employs a synchronous 4-switch buck-boost topology with integrated NMOS power switches (RDS(ON) = 0.35Ω typ), current-mode control, and built-in soft-start and loop compensation. Its 1.2MHz switching frequency enables use of compact 6.8µH inductors and ceramic capacitors while minimizing EMI.
It supports dual supply paths via VIN and EXTVCC inputs, with automatic sourcing prioritization; includes programmable maximum power point control (MPPC) referenced to 1.00V ±5%, and features an accurate RUN comparator (1.05V rising threshold, 100mV hysteresis) for predictable enable/disable sequencing across temperature.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VIN Range | 2.4V to 25V (startup), or 0.6V to 25V when EXTVCC ≥ 3.15V - enables operation from single Li-ion or energy-harvesting sources. |
| VOUT Range | 1.0V to 25V (adjustable via FB pin) - supports regulation above, below, or equal to VIN without external components. |
| Quiescent Current | 1.6µA in Burst Mode (VIN = 12V, VOUT = 5V) - extends battery life in always-on sensor nodes. |
| Switching Frequency | 1.2MHz (typ), 1.0–1.4MHz (min–max) - allows small magnetics and low-profile layout; ultralow noise reduces EMI filtering needs. |
| Output Current | 600mA in buck mode; average inductor current limit selectable between 250mA and 660mA via ILIM pin - balances efficiency and thermal design. |
| MPPC Reference | 1.00V ±5% at MPPC pin - enables precise maximum power tracking from PV panels or other non-ideal sources. |
| Shutdown IQ | 500nA (RUN < 0.2V) - ensures negligible drain during deep sleep or storage. |
Pinout & Package
The LTC3130IUDC#PBF is housed in a thermally enhanced 20-lead 3mm × 4mm plastic QFN package with exposed GND pad (Pin 21), requiring soldering to PCB ground plane for thermal and electrical performance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| BST1, BST2 | Bootstrap supplies for high-side NMOS gate drivers | Each requires dedicated 22nF capacitor to respective SW pin; critical for full gate drive and low RDS(ON) operation. |
| PVIN, VIN | Main power input and VCC regulator input | PVIN powers converter core; VIN feeds internal 4V LDO - decoupling (≥4.7µF) required on both for stability. |
| RUN | Enable comparator input | 1.05V rising threshold enables predictable startup; hysteresis (100mV) prevents chatter near UVLO. |
| MPPC | Maximum Power Point Control input | Connects to resistor divider from VIN; servo action maintains programmed input voltage - essential for solar harvesters. |
| MODE | Operation mode select | Ground = Burst Mode (ultra-low IQ); tie to VCC = fixed-frequency PWM (low-noise, constant fSW). |
| FB / VS1/VS2 | Feedback input (LTC3130) or fixed-VOUT select (LTC3130-1) | LTC3130IUDC#PBF uses FB pin for adjustable output; VS1/VS2 not functional on this variant. |
| ILIM | Average inductor current limit select | Ground = 250mA min limit; VCC = 660mA min limit - sets peak current capability and thermal envelope. |
| PGOOD | Open-drain power-good indicator | Pulls low when VOUT deviates >5% from regulation - used for system sequencing and fault detection. |
| EXTVCC | Secondary VCC regulator input | Accepts 3.15–25V; enables sub-1V VIN operation and reduces input quiescent draw - must be grounded if unused. |
| GND / PGND / Exposed Pad | Analog/digital and power ground | Exposed pad (Pin 21) is GND and must be soldered to PCB ground plane for θJA = 52°C/W thermal performance. |
Key Features
| Feature | Design Value |
|---|---|
| Ultralow-quiescent-current Burst Mode | 1.6µA no-load input current enables multi-year battery life in intermittent-sensing applications. |
| Programmable Maximum Power Point Control (MPPC) | 1.00V reference with <20nA input bias enables accurate, low-power solar panel voltage tracking without external op-amps. |
| Accurate RUN comparator threshold | 1.05V rising threshold with 100mV hysteresis ensures reliable, jitter-free enable/disable across –40°C to 125°C. |
| Integrated soft-start and loop compensation | 12ms typical soft-start time and internal compensation reduce external component count and simplify design validation. |
| Thermally enhanced QFN package | 20-lead 3mm × 4mm QFN with exposed GND pad achieves θJA = 52°C/W - supports 600mA continuous output without heatsink. |
Applications
| Solar-Powered Environmental Sensor Node | Portable Military Radio Power Management |
|---|---|
|
Use Scenario: Outdoor sensor node powered by small PV panel and Li-ion backup, operating continuously for >5 years on battery alone. IC Role / Device Role / Timing Role: Primary buck-boost regulator with MPPC actively tracks panel's maximum power point while regulating stable 3.3V for MCU and RF transceiver. Use Value: 1.6µA Burst Mode IQ and 0.6V minimum VIN extend runtime; MPPC increases harvested energy by up to 25% vs. fixed-input designs. |
Use Scenario: Handheld tactical radio requiring reliable 5V/600mA rail from variable 3.6–16V battery pack under extreme temperature (-40°C to +85°C). IC Role / Device Role / Timing Role: Wide-input buck-boost converter delivering regulated 5V output regardless of battery state-of-charge or load transients. Use Value: 2.4V–25V input range accommodates depleted and fully charged batteries; 95% peak efficiency minimizes heat in sealed enclosure. |
| Low-Power Industrial IoT Gateway | Long-Life Battery-Operated Instrumentation |
|
Use Scenario: Edge gateway collecting data from multiple sensors, sleeping 99% of time, waking periodically to transmit via LTE-M. IC Role / Device Role / Timing Role: Always-on power supply maintaining 3.3V rail with ultra-low standby IQ and fast wake-up response (<100µs). Use Value: 500nA shutdown current prevents battery drain during storage; RUN pin enables precise microcontroller-controlled power sequencing. |
Use Scenario: Precision handheld meter (e.g., multimeter, gas detector) operating from two AA alkaline cells for >2 years. IC Role / Device Role / Timing Role: Efficient buck-boost regulator sustaining 12V analog front-end and 3.3V digital logic as battery voltage drops from 3.2V to 1.8V. Use Value: Adjustable 1V–25V output supports diverse subsystems; 1.2MHz switching avoids audible noise in sensitive measurement circuits. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar buck-boost regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS63020DSJR | Lower max VIN (5.5V), higher IQ (25µA), no MPPC, 2.5MHz fSW | Best for compact consumer wearables with stable input; unsuitable for solar or >5.5V industrial inputs. | Select when board space is constrained and MPPC is unnecessary; verify thermal performance at 600mA. |
| MAX77827AEWA+T | Higher IQ (3.5µA), narrower VIN (2.5–5.5V), integrated battery charger, no EXTVCC | Targeted at USB-powered portable devices with Li-ion charging; lacks wide-VIN and MPPC for energy harvesting. | Choose when integrated charging is required and input is limited to 5.5V; not drop-in for LTC3130IUDC#PBF systems. |
Compared with TPS63020DSJR and MAX77827AEWA+T, the LTC3130IUDC#PBF uniquely combines 25V input tolerance, 1.6µA Burst Mode IQ, and programmable MPPC - making it the only viable option for solar-charged, wide-input, ultra-low-power industrial sensing.
Availability
LTC3130IUDC#PBF is available at Aetrix Electronics and suitable for solar panel post-regulators, portable military radios, and long-life battery-operated instrumentation requiring stable component supply across extended temperature ranges and multi-year production cycles.
Supply support for LTC3130IUDC#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 continues its legacy of high-performance power management ICs for demanding industrial, aerospace, and instrumentation applications.
The LTC3130 product line was designed specifically for ultra-low-power, wide-input buck-boost conversion in energy-constrained environments such as solar-powered sensors, battery-backed instrumentation, and portable defense electronics.
FAQ
What is the minimum input voltage required to start up the LTC3130IUDC#PBF?
The LTC3130IUDC#PBF achieves startup from as low as 2.4V when powered solely from VIN. With EXTVCC enabled (≥3.15V), startup is possible from VIN as low as 0.6V - critical for energy-harvesting applications where source voltage may be very low at dawn or low light. The RUN pin threshold (1.05V) and internal UVLO ensure clean, repeatable turn-on behavior.
Does the LTC3130IUDC#PBF support fixed output voltages, or is it only adjustable?
The LTC3130IUDC#PBF is the adjustable version of the family and uses the FB pin for output voltage programming via an external resistor divider (VOUT = 1.00V × (1 + R1/R2)). It does not support the four fixed outputs (1.8V/3.3V/5.0V/12V) offered by the LTC3130-1 variant - those require VS1/VS2 pins, which are not functional on the LTC3130IUDC#PBF.
How does the MPPC function work on the LTC3130IUDC#PBF, and what external components are needed?
The MPPC pin on the LTC3130IUDC#PBF accepts a resistor divider from VIN to GND, setting a target input voltage (e.g., 5V). When the divider voltage falls below ~1.0V, the controller reduces inductor current to servo VIN to that target. No op-amp or external circuitry is needed - only two resistors. Layout best practices (short traces, minimal capacitance) are essential due to the pin's high sensitivity (≤20nA input bias).
What is the purpose of the EXTVCC pin on the LTC3130IUDC#PBF, and how should it be used?
The EXTVCC pin on the LTC3130IUDC#PBF provides a secondary input to the internal 4V VCC regulator. When tied to VOUT or another 3.15–25V supply, it powers the IC directly - reducing VIN quiescent current and enabling operation with VIN as low as 1V. If unused, EXTVCC must be grounded. A 4.7µF capacitor is recommended unless connected directly to VOUT's bulk capacitor.
Can the LTC3130IUDC#PBF operate in both buck and boost modes simultaneously, and how is mode transition managed?
Yes - the LTC3130IUDC#PBF operates seamlessly across buck, boost, and buck-boost regions using its 4-switch synchronous topology. Mode transitions occur automatically based on duty cycle requirements to maintain regulation; no external control is needed. The IC sustains regulation whether VOUT is above, below, or equal to VIN - verified across full load and temperature ranges per datasheet Figure 20 and efficiency curves.
LTC3130IUDC#PBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 20-WFQFN Exposed Pad
- Packaging:
- Tube
- Product Status:
- Active
- Function:
- Step-Up/Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck-Boost
- Output Type:
- Adjustable
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 2.4V
- Voltage - Input (Max):
- 25V
- Voltage - Output (Min/Fixed):
- 1V
- Voltage - Output (Max):
- 25V
- Current - Output:
- 600mA
- Frequency - Switching:
- 1.2MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-QFN (3x4)
LTC3130IUDC#PBF FAQ
1.How can I place an order for LTC3130IUDC#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC3130IUDC#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 LTC3130IUDC#PBF reliable?
The price and inventory of LTC3130IUDC#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC3130IUDC#PBF is usually 5 days.
3.What payment methods are accepted for LTC3130IUDC#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC3130IUDC#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC3130IUDC#PBF?
LTC3130IUDC#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC3130IUDC#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 LTC3130IUDC#PBF?
For technical support, including LTC3130IUDC#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC3130IUDC#PBF requirements.
6.How does Aetrix verify that LTC3130IUDC#PBF is sourced from the original manufacturer or authorized distributors?
All LTC3130IUDC#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 LTC3130IUDC#PBF meets industry standards.
7.What is the process for return or replacement of LTC3130IUDC#PBF?
All LTC3130IUDC#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC3130IUDC#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 LTC3130IUDC#PBF part is unused and in its original packaging.
Return procedure for LTC3130IUDC#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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