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Analog Devices Inc. LT8335EDDB#TRMPBF
- Part No.:
- LT8335EDDB#TRMPBF
- Manufacturer:
- Analog Devices Inc.
- Package:
- 8-WFDFN Exposed Pad
- Datasheet:
-
LT8335EDDB#TRMPBF.pdf
- Description:
- IC REG BOOST SEPIC ADJ 2A 8DFN
- Quantity:
- Payment:
- Shipping:
Inventory:4,310
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Product details
Overview
LT8335EDDB#TRMPBF from Analog Devices (formerly Linear Technology) is a current-mode DC/DC converter IC capable of boost, SEPIC, or inverting configurations with a 2A/28V internal power switch, 6µA quiescent current in Burst Mode, and fixed 2MHz switching frequency - used in low-power industrial sensors and portable medical diagnostics requiring stable negative or positive regulated outputs.
For engineers reviewing the LT8335EDDB#TRMPBF datasheet, LT8335EDDB#TRMPBF pinout, LT8335EDDB#TRMPBF application, or LT8335EDDB#TRMPBF equivalent, key selection criteria include ultralow IQ operation, single-feedback polarity programming, integrated soft-start/frequency foldback, and DFN-8 (3mm × 2mm) thermal performance under 125°C junction conditions.
Technical Context
The LT8335EDDB#TRMPBF implements fixed-frequency (2MHz) current-mode control with dual error amplifiers enabling topology-agnostic regulation: A1 active for boost/SEPIC (FBX referenced to +1.60V), A2 active for inverting (FBX referenced to –0.80V). Frequency foldback activates when FBX approaches GND during startup or fault, extending off-time to prevent inductor current runaway.
It integrates an internal 3V LDO (INTVCC) with 2.5V/2.6V UVLO thresholds, EN/UVLO pin with 1.60V turn-off and 1.68V turn-on (80mV hysteresis), and thermal lockout at 170°C. The 2A switch features 170mΩ RDS(ON) and supports minimum on-time (115ns) and off-time (65ns) constraints across 3V–25V input range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 3V to 25V - supports wide-input battery-powered and industrial bus systems without external pre-regulation. |
| Quiescent Current (Burst Mode) | 6µA - enables >10-year battery life in always-on IoT sensor nodes with microamp-level standby loads. |
| Switch Rating | 2A, 28V - delivers up to 520mA output at 6VIN/12VOUT in boost mode with margin for transient peaks. |
| Switching Frequency | Fixed 2MHz - allows use of sub-1µH inductors (e.g., 0.68µH–2.2µH), minimizing solution footprint and EMI filter size. |
| Feedback Reference | +1.60V (positive VOUT) or –0.80V (negative VOUT) - enables single-resistor-divider programming of both polarities without external op-amps. |
| Package | 8-Lead DFN (3mm × 2mm, 0.75mm height) with exposed GND pad - achieves θJA = 80.5°C/W for high-power-density thermal management. |
| Operating Junction Temp | –40°C to 125°C - qualified for automotive under-hood and industrial control cabinet environments. |
Pinout & Package
LT8335EDDB#TRMPBF uses an 8-lead plastic DFN package (3mm × 2mm, 0.75mm profile) with exposed thermal pad (Pin 9, GND) requiring PCB soldering to a solid ground plane for thermal and electrical integrity. Pin 5 is also GND and must connect to the same plane.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN | Input supply connection | Accepts 3V–25V; requires local 4.7µF ceramic bypass placed adjacent to VIN/GND pins to suppress high-frequency ripple. |
| SW | Drain of internal 2A/28V MOSFET | High-slew node; trace length minimized to reduce EMI and voltage overshoot during switching transitions. |
| FBX | Topology-selectable feedback input | Connects to resistor divider from VOUT; sets regulation point at +1.60V (boost/SEPIC) or –0.80V (inverting); <10nA bias current enables high-value dividers for low IQ. |
| GND | Power and signal reference | Pins 5 and 9 (exposed pad) must be soldered to large copper ground plane for thermal dissipation and noise immunity. |
| EN/UVLO | Enable and programmable undervoltage lockout | 1.60V falling threshold disables switching; 1.68V rising threshold re-enables; 0.2V shutdown reduces IQ to <1µA. |
| INTVCC | Internally regulated 3V supply | Must be bypassed with ≥1µF low-ESR ceramic capacitor; no external loading permitted - powers gate driver and internal logic. |
| NC | No internal connection | Electrically isolated; tie to local GND for mechanical stability and EMI reduction. |
Key Features
| Feature | Design Value |
|---|---|
| Ultralow IQ Burst Mode | 6µA input current at light load maintains <15mV output ripple while enabling decade-long battery operation. |
| Single-Pin Polarity Selection | FBX pin automatically configures error amplifier (A1 or A2) based on divider voltage polarity - eliminates external topology-switching circuitry. |
| Integrated Soft-Start & Foldback | 1.2ms soft-start ramp limits inrush; frequency foldback below 0.2V FBX prevents current runaway during startup or short-circuit recovery. |
| Thermal Lockout Protection | Halts switching at 170°C junction temperature and resumes with soft-start after 5°C cooldown - prevents permanent die damage under sustained overload. |
| Internal Compensation | Eliminates external compensation components for ceramic or tantalum output capacitors - reduces BOM count and layout sensitivity. |
Applications
| Industrial Sensor Node | Portable Medical Diagnostic |
|---|---|
|
Use Scenario: Battery-powered gas sensor module operating continuously for 5+ years on two AA cells, requiring ±5V rails for analog front-end and ADC. IC Role / Device Role / Timing Role: LT8335EDDB#TRMPBF serves as dual-rail power source - configured as inverting converter for –5V and boost for +5V from 3V nominal input. Use Value: 6µA quiescent current extends battery life; 2MHz switching enables compact 1.5mm-height inductor; DFN-8 fits space-constrained PCB. |
Use Scenario: Handheld ultrasound probe with low-noise analog signal chain needing clean ±12V supplies from single 3.7V Li-ion cell. IC Role / Device Role / Timing Role: LT8335EDDB#TRMPBF operates in boost mode for +12V and inverting mode for –12V, sharing one FBX network and inductor. Use Value: Single-feedback architecture simplifies design; low ripple Burst Mode avoids interference with sensitive RF receive paths; –40°C to 125°C rating ensures field reliability. |
| Automotive Telematics Unit | Telecom Remote Transceiver |
|
Use Scenario: CAN-based vehicle tracker mounted in trunk, powered from 9V–16V battery with cold-crank tolerance down to 3V. IC Role / Device Role / Timing Role: LT8335EDDB#TRMPBF configured as SEPIC converter to maintain regulated 5V output during engine cranking dips. Use Value: 3V–25V input range handles cold-crank transients; 2A switch sustains 400mA load during GPS burst transmission; DFN package withstands vibration. |
Use Scenario: Outdoor fiber-to-the-home (FTTH) ONT requiring isolated ±15V bias for optical laser driver and TIA, powered from 12V PoE-derived rail. IC Role / Device Role / Timing Role: LT8335EDDB#TRMPBF generates non-isolated ±15V rails for analog front-end using discrete inductor/diode stage. Use Value: Fixed 2MHz frequency simplifies EMI filtering for FCC Class B compliance; low-profile DFN eases heatsink integration in sealed enclosure. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar DC/DC converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LT8330EDDB#TRMPBF | Lower 1.2A switch rating, 3.5µA IQ, same 2MHz frequency and DFN-8 package. | Suitable only for ≤250mA output loads; lacks full 2A headroom for burst-current applications like GPS or LTE modules. | Select when output current ≤200mA and lowest possible IQ is critical; not drop-in for 2A designs. |
| TPS61088RHLR | 2.5A/20V switch, 1.2MHz max frequency, 25µA IQ, WQFN-16 package, no inverting capability. | Requires separate IC for negative rail generation; higher IQ reduces battery life in always-on devices; larger footprint. | Choose for cost-sensitive high-current boost-only apps where negative voltage is unnecessary and board area is less constrained. |
Compared with LT8335EDDB#TRMPBF, LT8330EDDB#TRMPBF trades peak current capability for lower IQ, while TPS61088RHLR offers higher current but sacrifices topology flexibility, efficiency at light load, and package density - making LT8335EDDB#TRMPBF optimal for space- and energy-constrained dual-polarity systems.
Availability
LT8335EDDB#TRMPBF is available at Aetrix Electronics and suitable for industrial sensor nodes, portable medical diagnostics, automotive telematics units, and telecom remote transceivers requiring stable component supply with guaranteed long-term manufacturability.
Supply support for LT8335EDDB#TRMPBF 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, Inc. (acquired Linear Technology in 2017) is a global leader in high-performance analog, mixed-signal, and power management semiconductors, serving precision instrumentation, industrial automation, and communications markets.
The LT8335EDDB#TRMPBF belongs to Linear's µModule®-adjacent monolithic DC/DC converter family, designed specifically for ultra-low-power, multi-topology power conversion in space-constrained battery-operated and harsh-environment systems.
FAQ
What is the maximum output current achievable with LT8335EDDB#TRMPBF in boost configuration?
The LT8335EDDB#TRMPBF supports up to 520mA output current at 6VIN/12VOUT in boost mode, limited by its 2A internal switch, thermal design, and inductor saturation current. At 3VIN, output drops to 275mA due to duty-cycle constraints and reduced efficiency. Actual deliverable current depends on PCB layout, ambient temperature, and inductor DCR.
Can LT8335EDDB#TRMPBF generate negative output voltages, and how is polarity selected?
Yes, LT8335EDDB#TRMPBF natively supports negative output voltages via inverting topology. Polarity is selected solely by the FBX pin voltage: when the resistor divider pulls FBX below GND (e.g., to –0.80V), the internal A2 amplifier activates for non-inverting regulation of negative VOUT. No external switches or mode pins are required.
Does LT8335EDDB#TRMPBF require external compensation components?
No, LT8335EDDB#TRMPBF features fully internal compensation optimized for both low-ESR ceramic and higher-ESR tantalum output capacitors. This eliminates external compensation networks, reducing BOM count and layout sensitivity while maintaining stability across load and temperature ranges.
What thermal management is required for LT8335EDDB#TRMPBF in continuous 2A operation?
For continuous high-current operation, LT8335EDDB#TRMPBF requires soldering of its exposed thermal pad (Pin 9) to a minimum 200mm² internal or external GND copper plane. Pin 5 must also connect to the same plane. With this, θJA = 80.5°C/W enables ~1.2W dissipation before reaching 125°C junction limit at 25°C ambient.
How does LT8335EDDB#TRMPBF achieve 6µA quiescent current, and what design choices preserve it?
LT8335EDDB#TRMPBF achieves 6µA IQ via ultralow-power Burst Mode operation that shuts down all switching circuitry between pulses. To preserve this, use high-value FBX divider resistors (≥250kΩ), low-leakage Schottky diodes (<1µA reverse current), and minimize parasitic output leakage - all confirmed in LT8335EDDB#TRMPBF characterization data.
LT8335EDDB#TRMPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 8-WFDFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- 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):
- 25V
- Voltage - Output (Min/Fixed):
- 1.6V, -0.8V
- Voltage - Output (Max):
- 28V (Switch)
- Current - Output:
- 2A (Switch)
- 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)
LT8335EDDB#TRMPBF FAQ
1.How can I place an order for LT8335EDDB#TRMPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT8335EDDB#TRMPBF 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 LT8335EDDB#TRMPBF reliable?
The price and inventory of LT8335EDDB#TRMPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LT8335EDDB#TRMPBF is usually 5 days.
3.What payment methods are accepted for LT8335EDDB#TRMPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT8335EDDB#TRMPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT8335EDDB#TRMPBF?
LT8335EDDB#TRMPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT8335EDDB#TRMPBF 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 LT8335EDDB#TRMPBF?
For technical support, including LT8335EDDB#TRMPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT8335EDDB#TRMPBF requirements.
6.How does Aetrix verify that LT8335EDDB#TRMPBF is sourced from the original manufacturer or authorized distributors?
All LT8335EDDB#TRMPBF 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 LT8335EDDB#TRMPBF meets industry standards.
7.What is the process for return or replacement of LT8335EDDB#TRMPBF?
All LT8335EDDB#TRMPBF units undergo pre-shipment inspection (PSI). If there is an issue with LT8335EDDB#TRMPBF, 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 LT8335EDDB#TRMPBF part is unused and in its original packaging.
Return procedure for LT8335EDDB#TRMPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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