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Analog Devices Inc. LT8330JDDB#TRPBF
- Part No.:
- LT8330JDDB#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Package:
- 8-WFDFN Exposed Pad
- Datasheet:
-
LT8330JDDB#TRPBF.pdf
- Description:
- IC REG BOOST SEPIC ADJ 1A 8DFN
- Quantity:
- Payment:
- Shipping:
Inventory:3,889
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Product details
Overview
LT8330JDDB#TRPBF 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 FBX feedback supporting ±0.8V/1.6V regulation thresholds - used in automotive infotainment power rails requiring high efficiency at microamp-level standby loads.
For engineers reviewing the LT8330JDDB#TRPBF datasheet, LT8330JDDB#TRPBF pinout, LT8330JDDB#TRPBF application, or LT8330JDDB#TRPBF equivalent, key selection criteria include its AEC-Q100-qualified 8-lead DFN package, –40°C to 150°C junction temperature rating, ultralow IQ operation in Burst Mode, and dual-polarity output programming capability without external op-amps.
Technical Context
The LT8330JDDB#TRPBF implements fixed-frequency (2MHz) current-mode control with internal slope compensation and dual error amplifiers - one active for positive outputs (FBX = +1.6V reference), the other for negative outputs (FBX = –0.8V reference). Its architecture enables seamless topology reconfiguration via resistor divider placement alone.
It integrates frequency foldback during low-VOUT conditions to prevent inductor current runaway, thermal lockout at 170°C, soft-start with VC-node ramping, and EN/UVLO with 1.6V turn-on threshold and 80mV hysteresis - all operating within a single 3V INTVCC-regulated domain derived from VIN.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 3V to 40V - supports wide automotive battery transients and industrial 24V systems without pre-regulation. |
| Quiescent Current (IQ) | 6µA in Burst Mode - enables >10-year battery life in always-on telematics modules. |
| Switch Rating | 1A continuous, 60V breakdown - handles 48V boost conversion with margin for voltage spikes. |
| Switching Frequency | Fixed 2MHz - permits use of sub-1µH inductors and reduces EMI filter size by 4× vs 500kHz designs. |
| FBX Regulation | +1.60V (positive VOUT) or –0.80V (negative VOUT) - enables polarity selection without topology change or extra pins. |
| EN/UVLO Threshold | 1.62V rising / 1.56V falling - allows precise input undervoltage lockout with 80mV hysteresis for stable restart. |
| Operating Junction Temp | –40°C to +150°C - qualified for under-hood automotive applications per AEC-Q100 Grade 1. |
Pinout & Package
LT8330JDDB#TRPBF uses an 8-lead (3mm × 2mm) plastic DFN package with exposed thermal pad (Pin 9, GND) requiring PCB soldering for thermal performance (θJA = 60°C/W). Pin 5 is GND; Pin 9 must be connected to system ground plane.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - FBX | Feedback Reference Input | Accepts either +1.6V or –0.8V reference to configure positive/negative output topologies using same pin. |
| 2 - NC | No Internal Connection | Must be tied to local ground; no internal circuitry connected - prevents floating node EMI coupling. |
| 3 - SW | Internal Power Switch Drain | High dv/dt node; requires minimized trace area and tight layout to reduce radiated EMI and gate ringing. |
| 4 - SW | Internal Power Switch Drain (Dual Bond Wire) | Second SW connection improves current sharing and thermal distribution across die-to-package interface. |
| 5 - EN/UVLO | Enable & Undervoltage Lockout Input | Logic-controlled shutdown or programmable UVLO with 1.6V threshold - draws <1µA when pulled below 0.2V. |
| 6 - INTVCC | Internally Regulated 3V Supply | Powers internal logic and gate driver; requires ≥1µF low-ESR ceramic bypass capacitor to GND - no external loading permitted. |
| 7 - VIN | Main Input Supply | 3V–40V input rail; must be locally bypassed with 4.7µF X7R ceramic placed adjacent to VIN/GND pins. |
| 8 - GND | Analog & Power Ground | Primary ground reference; connects to exposed thermal pad (Pin 9) - forms low-inductance return path for switch current. |
Key Features
| Feature | Design Value |
|---|---|
| Ultralow IQ Burst Mode | 6µA input current at light load maintains <15mV output ripple - critical for battery-powered diagnostic tools. |
| Dual-Polarity Output Programming | Single FBX pin supports both +VOUT (boost/SEPIC) and –VOUT (inverting) configurations - eliminates need for external level shifters. |
| Integrated Soft-Start & Foldback | 1ms soft-start ramp and FBX-triggered frequency foldback prevent inrush current and inductor saturation during startup/fault recovery. |
| AEC-Q100 Qualified DFN | 8-lead (3mm × 2mm) package rated for –40°C to +150°C junction temperature - validated for automotive power supply modules. |
| Internal Compensation | No external compensation components required - simplifies design for 4.7µF–15µF ceramic output capacitors across CCM/DCM operation. |
Applications
| Automotive Infotainment Display Power | Portable Medical Sensor Bias Supply |
|---|---|
Use Scenario: Generating +12V and –5V rails from 12V vehicle battery for TFT LCD bias and analog front-end conditioning in ADAS camera modules. IC Role / Device Role / Timing Role: Primary DC/DC controller managing dual-rail generation with single FBX pin, enabling compact layout in space-constrained head unit PCBs. Use Value: 6µA IQ extends battery backup runtime during ignition-off states; AEC-Q100 qualification ensures reliability over 15-year vehicle lifecycle. |
Use Scenario: Providing isolated ±3.3V bias for low-noise instrumentation amplifiers in handheld ECG monitors powered by coin-cell batteries. IC Role / Device Role / Timing Role: Inverting regulator generating –3.3V from 3.6V Li-ion cell while maintaining <15mV ripple in Burst Mode for ADC reference stability. Use Value: Dual-polarity support eliminates second IC; 2MHz operation allows 1µH inductor - reducing solution size by 40% vs legacy 500kHz converters. |
| Industrial PLC I/O Module Power | Telecom Remote Radio Unit Bias |
Use Scenario: Generating +24V from 12V backplane for isolated digital output drivers in DIN-rail mounted programmable logic controllers. IC Role / Device Role / Timing Role: Boost converter delivering 200mA at 24V with thermal foldback protection during ambient temperatures up to 70°C. Use Value: 150°C max junction rating enables operation in uncooled enclosures; 60V switch withstands 40V transients per IEC 61000-4-5. |
Use Scenario: Producing –12V bias for GaN PA bias sequencing in 5G small-cell remote radio units powered from 48V PoE++ infrastructure. IC Role / Device Role / Timing Role: Inverting converter with EN/UVLO programmed for controlled power-up sequence relative to main 48V rail. Use Value: Accurate 1.6V EN threshold enables precise sequencing; low-profile DFN fits height-constrained RF module assemblies. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar DC/DC converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LT8331EDDB#TRPBF | Higher 2.5A switch rating, same 2MHz frequency and FBX dual-reference architecture - but only rated to 125°C junction. | Suitable for higher-current 48V boost applications where thermal derating above 125°C is not required. | Select LT8331EDDB#TRPBF when output current exceeds 1A and ambient temperature remains ≤85°C. |
| TPS61088RHLR | 10A switch, 2.5V–12V input, no negative output capability, 600kHz–2.2MHz adjustable frequency - lacks FBX polarity flexibility and AEC-Q100 qualification. | Used in consumer portable electronics requiring high current at lower input voltages, not automotive or bipolar rail needs. | Choose TPS61088RHLR only for cost-sensitive, non-automotive 5V–12V boost applications with no negative rail requirement. |
Compared with LT8331EDDB#TRPBF and TPS61088RHLR, the LT8330JDDB#TRPBF uniquely combines AEC-Q100 qualification, dual-polarity output programming, and 6µA IQ in a thermally robust 150°C-rated DFN - making it the sole option for automotive-grade, low-power, bipolar-rail generation.
Availability
LT8330JDDB#TRPBF is available at Aetrix Electronics and suitable for automotive infotainment systems, portable medical diagnostics, industrial PLC I/O modules, and telecom remote radio units requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for LT8330JDDB#TRPBF 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 precision instrumentation, industrial automation, and automotive safety markets since 1965.
The LT8330JDDB#TRPBF belongs to Analog Devices' Power by Linear™ family of monolithic DC/DC converters designed specifically for space-constrained, high-reliability power conversion in automotive and industrial environments.
FAQ
What is the maximum junction temperature rating for the LT8330JDDB#TRPBF?
The LT8330JDDB#TRPBF is guaranteed over a full operating junction temperature range of –40°C to +150°C and is AEC-Q100 qualified for automotive applications. This rating is confirmed in the Absolute Maximum Ratings table and applies specifically to the JDDB grade - distinct from E/I/H variants with different temperature limits. Thermal lockout activates at 170°C (typical) to protect the device during overload.
Can the LT8330JDDB#TRPBF generate both positive and negative output voltages?
Yes, the LT8330JDDB#TRPBF supports both polarities using the same FBX pin: connect a resistor divider from VOUT to GND to set +VOUT with a +1.60V internal reference, or configure for –VOUT using a –0.80V reference. This dual-mode capability is intrinsic to the IC's internal amplifier selection logic and requires no external components or pin changes - a feature explicitly documented in the Block Diagram and OPERATION section.
What package type and thermal characteristics does the LT8330JDDB#TRPBF use?
The LT8330JDDB#TRPBF uses an 8-lead (3mm × 2mm) plastic DFN package with an exposed thermal pad (Pin 9, GND) that must be soldered to the PCB ground plane. Its thermal resistance is θJA = 60°C/W, significantly lower than the TSOT-23 variant (θJA = 125°C/W), enabling higher power density in thermally demanding applications such as under-hood automotive modules.
How does the LT8330JDDB#TRPBF achieve 6µA quiescent current?
The LT8330JDDB#TRPBF achieves 6µA IQ through its proprietary low-ripple Burst Mode architecture: during light loads, it delivers discrete current pulses to the output capacitor followed by extended sleep periods where most internal circuitry is disabled. This behavior is measured and specified in the Electrical Characteristics table under "VIN Quiescent Current" at TA = 25°C and confirmed in Typical Performance Characteristic Figure G10.
Is the LT8330JDDB#TRPBF pin-compatible with other LT8330 variants?
Yes, the LT8330JDDB#TRPBF shares identical pinout and footprint with all other DFN-packaged LT8330 variants (e.g., LT8330EDDB#TRPBF, LT8330IDDB#TRPBF), including matching SW, FBX, EN/UVLO, and GND terminal assignments. This allows direct substitution within the same package family - though temperature grade and qualification (e.g., AEC-Q100) differ between J, E, and I versions.
LT8330JDDB#TRPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 8-WFDFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Function:
- Step-Up, 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 ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-DFN (3x2)
LT8330JDDB#TRPBF FAQ
1.How can I place an order for LT8330JDDB#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT8330JDDB#TRPBF 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 LT8330JDDB#TRPBF reliable?
The price and inventory of LT8330JDDB#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LT8330JDDB#TRPBF is usually 5 days.
3.What payment methods are accepted for LT8330JDDB#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT8330JDDB#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT8330JDDB#TRPBF?
LT8330JDDB#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT8330JDDB#TRPBF 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 LT8330JDDB#TRPBF?
For technical support, including LT8330JDDB#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT8330JDDB#TRPBF requirements.
6.How does Aetrix verify that LT8330JDDB#TRPBF is sourced from the original manufacturer or authorized distributors?
All LT8330JDDB#TRPBF 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 LT8330JDDB#TRPBF meets industry standards.
7.What is the process for return or replacement of LT8330JDDB#TRPBF?
All LT8330JDDB#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LT8330JDDB#TRPBF, 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 LT8330JDDB#TRPBF part is unused and in its original packaging.
Return procedure for LT8330JDDB#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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