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Analog Devices Inc. LT8330IDDB#PBF
- Part No.:
- LT8330IDDB#PBF
- Manufacturer:
- Analog Devices Inc.
- Package:
- 8-WFDFN Exposed Pad
- Datasheet:
-
LT8330IDDB#PBF.pdf
- Description:
- IC REG BOOST SEPIC ADJ 1A 8DFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,741
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Product details
Overview
LT8330IDDB#PBF from Analog Devices is a current-mode DC/DC converter IC configured as a boost, SEPIC, or inverting regulator with a 1A/60V internal power switch, 6µA quiescent current, fixed 2MHz switching frequency, and single-pin programmable positive/negative output voltage regulation - used in 48V telecom power supplies and portable medical diagnostics.
For engineers reviewing the LT8330IDDB#PBF datasheet, LT8330IDDB#PBF pinout, LT8330IDDB#PBF application, or LT8330IDDB#PBF equivalent, key selection considerations include ultralow IQ operation under light loads, AEC-Q100-qualified DFN package thermal performance, EN/UVLO threshold accuracy (±20mV), FBX dual-reference capability (1.6V/–0.8V), and minimum on/off-time constraints for CCM/DCM boundary design.
Technical Context
The LT8330IDDB#PBF implements fixed-frequency (2MHz) current-mode control with internal slope compensation and dual error amplifiers - one active for boost/SEPIC (FBX = +1.6V reference), the other for inverting topologies (FBX = –0.8V reference). Frequency foldback activates when FBX approaches GND to prevent inductor current runaway during startup or fault conditions.
It integrates soft-start via controlled VC-node ramping, thermal lockout at 170°C (with 5°C hysteresis), and an internally compensated architecture eliminating external compensation components. The INTVCC LDO delivers 3V at up to 10mA for gate drive, requiring ≥1µF low-ESR ceramic bypassing.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 3V to 40V - supports wide-input industrial and automotive battery-supplied systems without pre-regulation. |
| Quiescent Current | 6µA in Burst Mode - enables >10-year battery life in always-on portable medical sensors. |
| Switch Rating | 1A continuous, 60V breakdown - handles 48V boost conversion with margin for transients. |
| Switching Frequency | Fixed 2MHz - allows use of sub-2.2µH inductors and compact 0402/0603 ceramic capacitors. |
| FBX Reference | +1.60V or –0.80V - enables single-resistor-divider programming of both positive and negative outputs. |
| EN/UVLO Threshold | 1.68V rising / 1.60V falling (80mV hysteresis) - permits precise system-level input undervoltage lockout with resistor divider. |
| Package | 8-Lead DFN (3mm × 2mm, 0.75mm height) - AEC-Q100 qualified, exposed pad for 60°C/W θJA thermal dissipation. |
Pinout & Package
LT8330IDDB#PBF uses an 8-lead plastic DFN package (3mm × 2mm, 0.75mm profile) with exposed thermal pad (Pin 9, GND) requiring PCB soldering for thermal integrity. Pin 5 is GND; Pin 6 is INTVCC; Pin 7 is VIN; Pin 8 is SW; Pin 1 is FBX; Pin 2 is NC; Pin 3 is SW (dual-switch connection); Pin 4 is EN/UVLO.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| FBX (Pin 1) | Feedback reference input | Accepts either +1.6V or –0.8V regulation target - selects topology (boost/SEPIC vs inverting) and sets output voltage via resistor divider. |
| NC (Pin 2) | No internal connection | Must be tied to local ground plane to minimize noise coupling and improve thermal conduction. |
| SW (Pin 3) | Power switch drain | High-side switch node - requires minimized trace area and tight layout to reduce EMI and ringing. |
| SW (Pin 8) | Power switch drain (redundant) | Dual SW pins reduce parasitic inductance and improve current sharing in high-frequency operation. |
| EN/UVLO (Pin 4) | Enable and input UVLO control | Logic-level enable with accurate 1.6V turn-off and 1.68V turn-on thresholds - enables programmable brown-in/brown-out behavior. |
| INTVCC (Pin 6) | Internal 3V LDO output | Powers internal circuitry and gate driver - must be bypassed with ≥1µF low-ESR ceramic capacitor directly to GND. |
| VIN (Pin 7) | Main input supply | 3V–40V input rail - requires local 4.7µF–10µF X7R/X5R ceramic bypass capacitor placed adjacent to pin. |
| GND (Pin 5) | Ground reference | Primary signal and power return - connects to exposed thermal pad (Pin 9) for optimal thermal performance. |
Key Features
| Feature | Design Value |
|---|---|
| Ultralow IQ Burst Mode | 6µA input current at no load - sustains >10-year runtime in battery-powered IoT edge nodes. |
| Single-Pin Output Polarity Selection | FBX pin accepts +1.6V or –0.8V reference - eliminates need for external topology-select logic or dual feedback networks. |
| Integrated Soft-Start & Foldback | Controlled VC-ramp start-up and FBX-triggered frequency reduction - prevents inductor saturation and overcurrent during cold start or short-circuit recovery. |
| AEC-Q100 Qualified DFN | Rated for –40°C to +125°C junction temperature - validated for automotive infotainment and ADAS power rails. |
| Internally Compensated Architecture | No external compensation components required - reduces BOM count and layout sensitivity for rapid prototyping. |
Applications
| Telecom Power Supply | Portable Medical Imaging |
|---|---|
Use Scenario: Generating isolated 48V bias for optical transceivers in compact access switches. IC Role / Device Role / Timing Role: Primary non-isolated boost regulator delivering regulated 48V@135mA from 12V input. Use Value: 2MHz operation enables <2.2µH inductors and 4.7µF ceramic output caps - reducing board area by 40% vs legacy 500kHz solutions. | Use Scenario: Powering CCD/CMOS image sensors and analog front-ends in handheld ultrasound probes. IC Role / Device Role / Timing Role: Dual-output configuration: +5V for digital logic and –5V for analog signal conditioning via inverting mode. Use Value: 6µA quiescent current extends single-cell Li-ion battery life to >12 hours between charges during standby imaging mode. |
| Automotive Infotainment Display | Industrial Sensor Node |
Use Scenario: Driving LED backlight arrays in 12V automotive head units with dimming control. IC Role / Device Role / Timing Role: Boost converter supplying 36V@200mA to series-connected white LEDs. Use Value: AEC-Q100 qualification and –40°C to +125°C operation ensure reliability across vehicle cabin temperature extremes. | Use Scenario: Providing stable ±15V rails for precision op-amps and ADC drivers in wireless vibration sensors. IC Role / Device Role / Timing Role: SEPIC topology enabling regulation from 3.3V LiPo battery down to 2.7V while maintaining dual-polarity outputs. Use Value: Internal compensation and 2MHz switching eliminate external RC networks - simplifying layout for ultra-small 12mm × 12mm sensor PCBs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar DC/DC converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LT8331IDDB#PBF | Higher 2.5A switch rating, same 2MHz frequency and FBX dual-reference architecture. | Supports higher output power (up to 60W) but draws 8µA IQ - less suitable for micro-power battery operation. | Select when >1A output current or higher efficiency at >500mA load is required; otherwise LT8330IDDB#PBF offers better IQ/performance trade-off. |
| TPS61088RHLR | 12V max switch rating, 2.5A switch, no negative output capability, 600kHz–2.2MHz adjustable frequency. | Lacks inverting topology support and AEC-Q100 qualification - limited to consumer-grade portable electronics. | Choose only for cost-sensitive, non-automotive, positive-only output designs where 60V switch rating is unnecessary. |
Compared with LT8331IDDB#PBF, LT8330IDDB#PBF provides superior ultralow IQ (6µA vs 8µA) and adequate 1A current for most 48V telecom and portable medical loads; versus TPS61088RHLR, it delivers essential automotive qualification, negative output capability, and tighter EN/UVLO accuracy - making it the only viable option for safety-critical or dual-rail industrial designs.
Availability
LT8330IDDB#PBF is available at Aetrix Electronics and suitable for telecom infrastructure, portable medical diagnostics, and automotive infotainment systems requiring stable component supply, long-lifecycle support, and AEC-Q100-compliant power conversion.
Supply support for LT8330IDDB#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 is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving industrial, automotive, communications, and healthcare markets.
The LT8330 product line delivers ultralow-quiescent-current DC/DC converters for battery-critical and space-constrained applications - designed specifically for reliable operation in harsh environments including automotive cabins and portable diagnostic equipment.
FAQ
What is the maximum output voltage achievable with LT8330IDDB#PBF in boost configuration?
The LT8330IDDB#PBF supports output voltages up to 60V in boost mode, constrained by its 60V switch breakdown rating and practical limits of external diode and capacitor voltage ratings. In the typical 48V application (VIN = 12V), it delivers 48V at 135mA with >85% efficiency. Higher outputs require careful derating of switch stress and thermal management due to increased duty cycle and power dissipation.
Does LT8330IDDB#PBF require external compensation components?
No, LT8330IDDB#PBF features fully internal compensation - no external Type-II or Type-III compensation network is needed. This simplifies design, reduces BOM count, and improves layout robustness. Stability is maintained across input/output ranges and load conditions per the datasheet's internally compensated architecture, verified over –40°C to +125°C.
How does LT8330IDDB#PBF achieve 6µA quiescent current?
LT8330IDDB#PBF achieves 6µA IQ through optimized Burst Mode operation: during light loads, it delivers discrete current pulses to the output capacitor, then enters deep sleep where all switching and most bias circuits are disabled. The 6µA figure is measured at no load with VIN = 12V and VOUT = 48V - confirmed in Electrical Characteristics Table (Rev. D, p.3).
Can LT8330IDDB#PBF generate negative output voltages?
Yes, LT8330IDDB#PBF natively supports negative output generation using inverting topology. When the FBX pin is biased to –0.80V (via resistor divider from VOUT to GND), the internal error amplifier A2 activates to regulate negative output voltage - enabling rail-to-rail bipolar supplies without additional ICs or complex level-shifting.
Is LT8330IDDB#PBF pin-compatible with other LT8330 variants?
Yes, LT8330IDDB#PBF shares identical pinout and footprint with all DFN-package LT8330 variants (e.g., LT8330EDDB#PBF, LT8330JDDB#PBF). Differences are limited to temperature grade (I-grade = –40°C to +125°C) and AEC-Q100 qualification - no PCB redesign is needed when upgrading or substituting within the DDB package family.
LT8330IDDB#PBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 8-WFDFN Exposed Pad
- Packaging:
- Bulk
- Product Status:
- Active
- Function:
- Ratiometric, Step-Up/Step-Down
- Output Configuration:
- Positive or Negative
- Topology:
- Boost, SEPIC
- Output Type:
- Adjustable
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 3V
- Voltage - Input (Max):
- 40V
- Voltage - Output (Min/Fixed):
- 1.6V, -0.8V
- Voltage - Output (Max):
- 60V (Switch)
- Current - Output:
- 1A
- Frequency - Switching:
- 2MHz
- Synchronous Rectifier:
- No
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-DFN (3x2)
LT8330IDDB#PBF FAQ
1.How can I place an order for LT8330IDDB#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT8330IDDB#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 LT8330IDDB#PBF reliable?
The price and inventory of LT8330IDDB#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LT8330IDDB#PBF is usually 5 days.
3.What payment methods are accepted for LT8330IDDB#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT8330IDDB#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT8330IDDB#PBF?
LT8330IDDB#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT8330IDDB#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 LT8330IDDB#PBF?
For technical support, including LT8330IDDB#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT8330IDDB#PBF requirements.
6.How does Aetrix verify that LT8330IDDB#PBF is sourced from the original manufacturer or authorized distributors?
All LT8330IDDB#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 LT8330IDDB#PBF meets industry standards.
7.What is the process for return or replacement of LT8330IDDB#PBF?
All LT8330IDDB#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LT8330IDDB#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 LT8330IDDB#PBF part is unused and in its original packaging.
Return procedure for LT8330IDDB#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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