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Analog Devices Inc. LT8335IDDB#TRMPBF
- Part No.:
- LT8335IDDB#TRMPBF
- Manufacturer:
- Analog Devices Inc.
- Package:
- 8-WFDFN Exposed Pad
- Datasheet:
-
LT8335IDDB#TRMPBF.pdf
- Description:
- IC REG BOOST SEPIC ADJ 2A 8DFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,645
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Product details
Overview
LT8335IDDB#TRMPBF from Analog Devices (formerly Linear Technology) is a current-mode DC/DC converter IC supporting boost, SEPIC, and inverting topologies with a single feedback pin for ± output voltage programming. It integrates a 2A/28V internal power switch, operates from 3V to 25V input, delivers ultralow 6µA quiescent current in Burst Mode, and runs at fixed 2MHz switching frequency - ideal for space-constrained, battery-powered industrial sensors requiring stable 12V rail generation from 3–6V sources.
For engineers reviewing the LT8335IDDB#TRMPBF datasheet, LT8335IDDB#TRMPBF pinout, LT8335IDDB#TRMPBF application, or LT8335IDDB#TRMPBF equivalent, key selection considerations include its dual-polarity output capability, 8-lead DFN (3mm × 2mm) thermal performance, programmable UVLO via EN/UVLO pin, internal compensation, and verified operation down to –40°C for automotive-grade embedded power rails.
Technical Context
The LT8335IDDB#TRMPBF uses fixed-frequency current-mode control with internal slope compensation and dual error amplifiers - one active for positive outputs (FBX = +1.60V reference), the other for negative outputs (FBX = –0.80V reference). Its architecture enables seamless topology reconfiguration without external component changes.
It implements frequency foldback during low-VOUT conditions and integrated soft-start with 1.2ms ramp time to limit inrush current. Thermal lockout triggers at 170°C (typical), and INTVCC is regulated to 3V with 2.5V/2.6V undervoltage thresholds for controlled startup and shutdown.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 3V to 25V - supports wide-input industrial and automotive supply rails including 3.3V, 5V, and 12V nominal sources. |
| Quiescent Current (Burst Mode) | 6µA - enables multi-year battery life in always-on IoT sensor nodes with light-load duty cycles. |
| Switch Rating | 2A, 28V - handles peak currents up to 2.5A (typical limit threshold), sufficient for 440mA output at 12V from 5V input in boost mode. |
| Switching Frequency | Fixed 2MHz (±10%) - allows use of sub-1µH inductors and compact ceramic output capacitors (e.g., 4.7µF–22µF). |
| Feedback Reference | +1.60V for positive VOUT; –0.80V for negative VOUT - enables single-resistor-divider programming of both polarities without external op-amps. |
| UVLO Threshold | Rising: 1.68V (typ), Falling: 1.60V (typ), 80mV hysteresis - ensures clean, glitch-free enable/disable sequencing across temperature. |
| Operating Junction Temp | –40°C to +125°C - qualified for under-hood automotive and industrial control environments. |
Pinout & Package
LT8335IDDB#TRMPBF is housed in an 8-lead, 3mm × 2mm plastic DFN package with exposed thermal pad (Pin 9, GND) requiring PCB soldering for thermal and electrical integrity. θJA = 80.5°C/W.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - VIN | Input Supply | Primary power input; must be bypassed with ≥4.7µF X7R/X5R ceramic capacitor placed adjacent to pin. |
| 2 - GND | Ground Reference | Signal ground connection; tied internally to exposed pad (Pin 9) - requires direct PCB copper pour connection. |
| 3 - SW | Power Switch Output | Drain of internal 2A/28V MOSFET; high di/dt node - minimize trace area to reduce EMI and parasitic inductance. |
| 4 - FBX | Feedback Input | Single-pin regulation interface: senses +1.60V (boost/SEPIC) or –0.80V (inverting) - sets output via resistor divider only. |
| 5 - EN/UVLO | Enable / Undervoltage Lockout | Logic-controlled shutdown and system-level UVLO programming; draws <1µA when pulled below 0.2V. |
| 6 - INTVCC | Internal 3V Regulator Output | Supplies gate driver and internal circuitry; requires ≥1µF low-ESR ceramic bypass to GND - no external loading permitted. |
| 7 - NC | No Connection | Internally unconnected; must be tied to local GND for mechanical stability and EMI reduction. |
| 8 - GND | Secondary Ground | Additional ground path; connects to same plane as Pin 2 and exposed pad for low-impedance return. |
Key Features
| Feature | Design Value |
|---|---|
| Ultralow IQ Burst Mode | 6µA quiescent current with <15mV output ripple - extends battery runtime while maintaining tight regulation in sleep states. |
| Topology Flexibility | Single FBX pin supports boost, SEPIC, and inverting configurations - eliminates need for multiple ICs or redesigns across voltage-signature requirements. |
| Integrated Protection | Thermal lockout (170°C), frequency foldback (low-VOUT), and soft-start (1.2ms) - prevent inductor saturation, switch overstress, and output overshoot during startup/fault recovery. |
| Programmable UVLO | Resistive divider on EN/UVLO sets precise turn-on/turn-off thresholds - enables custom brown-out behavior without external comparators. |
| Internal Compensation | No external compensation components required - reduces BOM count, layout complexity, and tuning effort for stable operation across full load and input range. |
Applications
| Industrial Sensor Node Power | Automotive Cabin Controller Rail |
|---|---|
|
Use Scenario: Battery-powered temperature/humidity sensor operating continuously on coin cell or Li-SOCl₂ with intermittent wireless transmission. IC Role / Device Role / Timing Role: Primary DC/DC regulator generating stable 12V bias for analog front-end and RF transceiver from 3.6V nominal supply. Use Value: 6µA IQ enables >10-year shelf life; 2MHz switching allows ultra-compact 12V rail in <15mm² footprint using 1µH inductor and 10µF ceramic cap. |
Use Scenario: HVAC control module in passenger compartment requiring isolated 5V/12V rails from 12V vehicle battery with cold-crank tolerance. IC Role / Device Role / Timing Role: Secondary boost converter delivering regulated 12V for display backlight and motor drivers during cranking (down to 6V input). Use Value: 3V–25V input range survives cold-crank dips; –40°C to +125°C rating ensures reliability; UVLO programmability prevents erratic reset during voltage sag. |
| Portable Medical Diagnostic Output | Telecom Remote PHY Bias Supply |
|
Use Scenario: Handheld ultrasound probe requiring low-noise ±5V analog supply derived from single-cell lithium polymer (3.0–4.2V). IC Role / Device Role / Timing Role: Inverting converter generating –5V rail with single FBX feedback network - complements separate boost stage for +5V. Use Value: Dual-polarity support eliminates need for dual converters; internal –0.80V reference enables accurate negative rail without external references or op-amps. |
Use Scenario: Remote PHY unit in fiber-to-the-home (FTTH) node needing 12V bias for laser diode driver with minimal standby power draw. IC Role / Device Role / Timing Role: High-efficiency boost converter operating in Burst Mode during idle periods to maintain 12V rail with <10µA average input current. Use Value: Low-ripple Burst Mode keeps output ripple <15mV while achieving >85% efficiency at 10mA load - critical for laser bias stability and EMI compliance. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar DC/DC converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LT8330IDDB#TRMPBF | Lower 1.2A switch current rating; identical 2MHz frequency, FBX architecture, and package. | Suitable only for ≤250mA output loads; lacks headroom for 440mA@12V boost applications. | Select LT8330IDDB#TRMPBF only when output current demand is ≤200mA and board space/thermal constraints favor lower-cost variant. |
| TPS61088RHLR | 5.5V max input; 4A switch; no negative output capability; requires external compensation. | Not usable for inverting or wide-input (>5.5V) applications; higher IQ (25µA) limits battery life. | Choose TPS61088RHLR only for cost-sensitive, single-rail 3.3V/5V boost applications where input stays ≤5.5V and negative output is unnecessary. |
Compared with LT8335IDDB#TRMPBF, LT8330IDDB#TRMPBF trades current capability for lower cost in light-load scenarios, while TPS61088RHLR offers higher peak current but sacrifices input voltage range, polarity flexibility, and ultralow IQ - making LT8335IDDB#TRMPBF uniquely suited for wide-input, dual-polarity, battery-critical designs.
Availability
LT8335IDDB#TRMPBF is available at Aetrix Electronics and suitable for industrial sensor nodes, automotive cabin controllers, portable medical diagnostics, telecom remote PHY units, and battery-backed instrumentation requiring stable component supply with guaranteed long-term availability.
Supply support for LT8335IDDB#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 automotive markets.
The LT8335IDDB#TRMPBF belongs to Analog Devices' µModule®-adjacent monolithic DC/DC converter product line, designed specifically for compact, high-efficiency, wide-input power conversion in space- and energy-constrained embedded systems.
FAQ
What is the maximum output current achievable with LT8335IDDB#TRMPBF in boost configuration?
The LT8335IDDB#TRMPBF supports up to 440mA output current at 12V when operating from a 5V input, as validated in the front-page typical application. This is constrained by the 2A internal switch, inductor saturation limits, and thermal dissipation in the 3mm × 2mm DFN package. Peak switch current remains within 2.5A limit across all operating conditions per datasheet specifications.
Can LT8335IDDB#TRMPBF generate negative output voltages?
Yes, the LT8335IDDB#TRMPBF natively supports negative output generation using inverting topology. Its FBX pin accepts –0.80V internal reference, enabling precise regulation of negative rails (e.g., –5V or –12V) with a standard resistor divider - no external op-amps or level-shifters required. This capability is confirmed in the device description, block diagram, and applications information sections.
What is the purpose of the NC pin on LT8335IDDB#TRMPBF?
Pin 7 of the LT8335IDDB#TRMPBF is marked NC (No Connection) and has no internal circuit connection. Per the datasheet, it must be tied directly to local ground to ensure mechanical stability, improve thermal conduction through the package, and reduce EMI susceptibility - not for functional signaling or biasing.
How does LT8335IDDB#TRMPBF achieve 6µA quiescent current?
The LT8335IDDB#TRMPBF achieves 6µA IQ via ultralow-power Burst Mode operation: during light loads, it delivers discrete current pulses to the output capacitor, then enters deep sleep where most internal circuitry (including oscillator and gate driver) is disabled. This architecture - detailed in the "Achieving Ultralow Quiescent Current" section - maintains regulation while minimizing average input current.
Is LT8335IDDB#TRMPBF RoHS-compliant and lead-free?
Yes, LT8335IDDB#TRMPBF carries the #TRMPBF suffix indicating tape-and-reel packaging with lead-free (Pb-free) finish, compliant with RoHS Directive 2011/65/EU. The part marking "LGVM" and order information table confirm lead-free plating and JEDEC-standard green packaging for this grade.
LT8335IDDB#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)
LT8335IDDB#TRMPBF FAQ
1.How can I place an order for LT8335IDDB#TRMPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT8335IDDB#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 LT8335IDDB#TRMPBF reliable?
The price and inventory of LT8335IDDB#TRMPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LT8335IDDB#TRMPBF is usually 5 days.
3.What payment methods are accepted for LT8335IDDB#TRMPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT8335IDDB#TRMPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT8335IDDB#TRMPBF?
LT8335IDDB#TRMPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT8335IDDB#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 LT8335IDDB#TRMPBF?
For technical support, including LT8335IDDB#TRMPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT8335IDDB#TRMPBF requirements.
6.How does Aetrix verify that LT8335IDDB#TRMPBF is sourced from the original manufacturer or authorized distributors?
All LT8335IDDB#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 LT8335IDDB#TRMPBF meets industry standards.
7.What is the process for return or replacement of LT8335IDDB#TRMPBF?
All LT8335IDDB#TRMPBF units undergo pre-shipment inspection (PSI). If there is an issue with LT8335IDDB#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 LT8335IDDB#TRMPBF part is unused and in its original packaging.
Return procedure for LT8335IDDB#TRMPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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