My Inquiry
My Account
Analog Devices Inc. LT8335IDDB#TRPBF
- Part No.:
- LT8335IDDB#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Package:
- 8-WFDFN Exposed Pad
- Datasheet:
-
LT8335IDDB#TRPBF.pdf
- Description:
- IC REG BOOST SEPIC ADJ 2A 8DFN
- Quantity:
- Payment:
- Shipping:
Inventory:4,738
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
LT8335IDDB#TRPBF 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, fixed 2MHz switching frequency, and single-pin programmable positive/negative output regulation - used in portable medical diagnostics and low-power industrial sensors.
For engineers reviewing the LT8335IDDB#TRPBF datasheet, LT8335IDDB#TRPBF pinout, LT8335IDDB#TRPBF application, or LT8335IDDB#TRPBF equivalent, key selection considerations include ultralow IQ operation down to 6µA, ±0.8V/1.6V FBX reference accuracy across temperature, 2.0–2.2MHz switching tolerance, EN/UVLO programmability with 80mV hysteresis, and thermal lockout at 170°C.
Technical Context
The LT8335IDDB#TRPBF implements fixed-frequency current-mode control with internal compensation, enabling stable regulation across 3V–25V input and wide output ranges without external loop components. Its dual-reference FBX pin (±0.8V for inverting, +1.6V for boost/SEPIC) selects error amplifier topology and determines VC node servo behavior.
It integrates frequency foldback during low-VOUT faults and soft-start via controlled VC ramping to limit inrush; INTVCC provides a regulated 3V supply for gate drive, while thermal lockout disables switching above 170°C junction temperature and resets soft-start on recovery.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 3V to 25V - supports wide-input battery-powered and industrial bus systems without pre-regulation. |
| Quiescent Current (Burst Mode) | 6µA - enables >1-year battery life in always-on sensor nodes drawing <100µA average load. |
| Switch Rating | 2A continuous, 28V max - handles 12V boost at 440mA from 5V input or inverting –12V at 350mA. |
| FBX Reference Voltage | +1.60V (boost/SEPIC) or –0.80V (inverting) - enables single-resistor-divider output programming for both polarities. |
| Switching Frequency | Fixed 2.0MHz (±10%) - allows use of sub-2mm × 2mm inductors and reduces EMI fundamental below 30MHz. |
| EN/UVLO Threshold | Rising: 1.68V, Falling: 1.60V (80mV hysteresis) - permits precise system-level brownout protection with external resistor divider. |
| Junction Temp Range | –40°C to +125°C - qualified for automotive under-hood and industrial control cabinet environments. |
Pinout & Package
LT8335IDDB#TRPBF uses an 8-lead (3mm × 2mm), 0.75mm-profile plastic DFN package with exposed thermal pad (Pin 9, GND). The package requires soldering the exposed pad to a PCB ground plane for thermal and electrical integrity.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN | Input Power Supply | Must be bypassed with ≥4.7µF X7R ceramic capacitor placed adjacent to pin; supports 3V–25V range. |
| GND (Pin 1 & Pin 5) | Ground Reference | Pin 1 is signal GND; Pin 5 connects to exposed pad - both must tie to low-impedance ground plane. |
| SW | Internal Switch Drain | High-dI/dt node; requires minimal trace area and direct routing to inductor/diode to suppress EMI. |
| FBX | Feedback Input | Accepts voltage divider from VOUT; selects +1.6V or –0.8V internal reference based on polarity configuration. |
| EN/UVLO | Enable / Undervoltage Lockout | Logic-controlled shutdown or programmable UVLO threshold; draws <40nA bias current. |
| INTVCC | Internal 3V Regulator Output | Supplies gate driver; requires ≥1µF low-ESR ceramic bypass to GND; no external loading permitted. |
| NC | No Connection | Internally unconnected; must be tied to local GND for mechanical stability and EMI reduction. |
Key Features
| Feature | Design Value |
|---|---|
| Ultralow IQ Burst Mode | 6µA input current with <15mV output ripple - extends battery life while maintaining tight regulation at microamp loads. |
| Single-Pin Polarity Selection | FBX pin automatically configures error amplifier for +1.6V (boost/SEPIC) or –0.8V (inverting) reference - eliminates topology-specific parts. |
| Integrated Soft-Start & Foldback | 1.2ms soft-start ramp + FBX-triggered frequency foldback - prevents inductor saturation and overcurrent during startup/faults. |
| Thermal Lockout Protection | Auto-shutdown at 170°C junction temp with 5°C hysteresis - protects against sustained overload without external thermal sensors. |
| 2MHz Fixed-Frequency Operation | Enables compact magnetics (e.g., 1.2µH, 3mm × 3mm) and simplifies EMI filtering vs variable-frequency alternatives. |
Applications
| Portable Medical Sensors | Industrial IoT Edge Nodes |
|---|---|
Use Scenario: Battery-powered glucose monitor with LCD backlight requiring +12V from 3.6V Li-ion cell. IC Role / Device Role / Timing Role: Boost converter generating regulated 12V rail with <6µA sleep current to maximize battery runtime between measurements. Use Value: Enables >2-year shelf life and >6-month operational life per charge using standard coin-cell or prismatic Li-ion. |
Use Scenario: Wireless vibration sensor node in factory automation, operating from 4–20mA loop or energy harvester. IC Role / Device Role / Timing Role: Inverting converter producing –5V rail for op-amp signal conditioning and ADC reference from 5V harvested supply. Use Value: Eliminates need for external negative charge pump or dual-output controller, reducing BOM count by 3 components. |
| Automotive Cabin Monitoring | Low-Power Telecom Interface |
Use Scenario: Occupant detection module powered from 12V vehicle battery with strict quiescent current limits (<10µA). IC Role / Device Role / Timing Role: SEPIC converter delivering isolated 5V logic rail during cold-crank (4.5V min) and load-dump (36V max) transients. Use Value: Maintains system uptime through automotive battery fluctuations without external TVS or LDO pre-regulation. |
Use Scenario: RS-485 transceiver module in remote metering device requiring ±12V rails from single 3.3V supply. IC Role / Device Role / Timing Role: Dual-stage inverting converter generating –12V, followed by boost stage for +12V, both controlled by shared FBX feedback. Use Value: Achieves full-duplex RS-485 compliance with <15mV ripple on both rails, meeting TIA-485-A noise immunity requirements. |
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#TRPBF | Lower 1.5A switch rating, same 2MHz frequency and 6µA IQ; lacks frequency foldback and thermal lockout. | Suitable only for ≤300mA output loads; not recommended for high-temp or fault-prone environments. | Select LT8335IDDB#TRPBF when >350mA output current, thermal protection, or robust startup under light-load conditions are required. |
| TPS61088RHLR | 5.5V max input, 12A switch, 2.5V–5.5V output range; no inverting/SEPIC support; higher 25µA IQ in light-load mode. | Limited to boost-only applications with narrow input range; unsuitable for negative rail generation or wide VIN systems. | Choose LT8335IDDB#TRPBF for bipolar outputs, 3V–25V input flexibility, or ultralow-IQ operation below 10µA. |
Compared with LT8330IDDB#TRPBF and TPS61088RHLR, the LT8335IDDB#TRPBF uniquely combines 2A/28V switching, ±0.8V/+1.6V dual-reference FBX, and integrated thermal/fault protections - making it the only option supporting inverting, SEPIC, and boost topologies across automotive and medical-grade temperature ranges with sub-10µA quiescent current.
Availability
LT8335IDDB#TRPBF is available at Aetrix Electronics and suitable for portable medical diagnostics, industrial IoT edge nodes, and automotive cabin monitoring requiring stable component supply, long-lifecycle assurance, and guaranteed -40°C to +125°C operation.
Supply support for LT8335IDDB#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 acquired Linear Technology in 2017 and maintains its legacy of high-performance analog and power management ICs with rigorous automotive and industrial qualification standards.
The LT8335IDDB#TRPBF belongs to Linear's ultralow-quiescent-current DC/DC converter family, designed specifically for battery-critical applications demanding extended runtime, multi-topology flexibility, and robust fault handling without external complexity.
FAQ
What is the maximum output current achievable with LT8335IDDB#TRPBF in boost configuration?
The LT8335IDDB#TRPBF supports up to 440mA output current at 12V from a 5V input, as verified in the front-page typical application (VIN = 5V, VOUT = 12V). This assumes optimal layout, 1.2µH inductor, and Schottky diode with ≤20µA leakage. Peak switch current remains within the 2A limit, and thermal performance stays within spec at ambient ≤85°C with proper PCB copper pour.
Can LT8335IDDB#TRPBF generate a negative output voltage?
Yes, the LT8335IDDB#TRPBF can generate negative output voltages using inverting topology. When the FBX pin is biased below GND via a resistor divider from VOUT, the internal –0.80V reference activates, configuring the error amplifier for inverting operation. Verified designs achieve –5V at 300mA from 5V input with <15mV ripple in Burst Mode.
Does LT8335IDDB#TRPBF require external compensation components?
No, the LT8335IDDB#TRPBF features fully internal compensation. Its current-mode architecture with built-in slope compensation and fixed 2MHz oscillator eliminates the need for external Type-II or Type-III compensation networks. Stability is maintained across all supported topologies (boost, SEPIC, inverting) with standard ceramic output capacitors.
What is the purpose of the NC pin on LT8335IDDB#TRPBF?
The NC (No Connect) pin on LT8335IDDB#TRPBF has no internal connection but must be tied to local GND for mechanical stability, thermal conduction, and EMI suppression. Leaving it floating may compromise package reliability and increase radiated emissions due to parasitic antenna effects in the 2MHz switching node vicinity.
How does LT8335IDDB#TRPBF manage thermal protection?
The LT8335IDDB#TRPBF incorporates thermal lockout that disables switching when junction temperature reaches 170°C (typical). Once temperature drops by ~5°C, it automatically resumes operation with full soft-start sequencing. This behavior is confirmed in the Electrical Characteristics table (Note 4) and Thermal Considerations section, ensuring self-protection without external circuitry.
LT8335IDDB#TRPBF 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#TRPBF FAQ
1.How can I place an order for LT8335IDDB#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT8335IDDB#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 LT8335IDDB#TRPBF reliable?
The price and inventory of LT8335IDDB#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LT8335IDDB#TRPBF is usually 5 days.
3.What payment methods are accepted for LT8335IDDB#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT8335IDDB#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT8335IDDB#TRPBF?
LT8335IDDB#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT8335IDDB#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 LT8335IDDB#TRPBF?
For technical support, including LT8335IDDB#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT8335IDDB#TRPBF requirements.
6.How does Aetrix verify that LT8335IDDB#TRPBF is sourced from the original manufacturer or authorized distributors?
All LT8335IDDB#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 LT8335IDDB#TRPBF meets industry standards.
7.What is the process for return or replacement of LT8335IDDB#TRPBF?
All LT8335IDDB#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LT8335IDDB#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 LT8335IDDB#TRPBF part is unused and in its original packaging.
Return procedure for LT8335IDDB#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LT8335IDDB#TRPBF Tags
-
TPS562201DDCR
Texas Instruments
-
MC34063ABD-TR
STMicroelectronics
-
TPS561201DDCR
Texas Instruments
-
MC33063ADR
Texas Instruments
-
MC34063ADR
Texas Instruments
-
TPS560200DBVR
Texas Instruments
-
AP3012KTR-G1
Diodes Incorporated
-
TLV61048DBVR
Texas Instruments
-
AZ34063UMTR-G1
Diodes Incorporated
-
TPS562200DDCR
Texas Instruments
-
AP62300TWU-7
Diodes Incorporated
-
MC34063EBD-TR
STMicroelectronics
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
