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Analog Devices Inc. LT3467IDDB#TRMPBF
- Part No.:
- LT3467IDDB#TRMPBF
- Manufacturer:
- Analog Devices Inc.
- Package:
- 8-WFDFN Exposed Pad
- Datasheet:
-
LT3467IDDB#TRMPBF.pdf
- Description:
- IC REG BST FLYBACK ADJ 1.1A 8DFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,271
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Product details
Overview
LT3467IDDB#TRMPBF from Analog Devices is a 1.3MHz, 42V, 1.1A monolithic step-up DC/DC converter in an 8-lead 3mm × 2mm DFN package with integrated soft-start, dedicated SS pin, and 1.255V feedback reference. It delivers 5V at 540mA from 3.3V input and supports boost, SEPIC, and flyback topologies up to 40V output in space-constrained portable power applications.
For engineers reviewing the LT3467IDDB#TRMPBF datasheet, LT3467IDDB#TRMPBF pinout, LT3467IDDB#TRMPBF application, or LT3467IDDB#TRMPBF equivalent, this page provides verified technical context, real-world performance data (e.g., 330mV VCE(SAT) at 1.1A, <1µA shutdown current), package-specific layout guidance, and validated alternative options for industrial and automotive-grade boost conversion designs.
Technical Context
The LT3467IDDB#TRMPBF implements constant-frequency current-mode PWM control with a 1.3MHz oscillator, enabling stable regulation and predictable noise filtering. Its internal NPN switch features low 330mV saturation voltage at 1.1A, supporting high-efficiency operation across 2.4V–16V input and up to 40V output.
Soft-start is implemented via a dedicated SS pin with 4µA internal charging current into an external capacitor, limiting inrush and controlling output voltage ramp rate. The device operates over –40°C to +125°C junction temperature and includes overcurrent protection with 1.4A typical switch current limit.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Switching Frequency | 1.3MHz - enables use of sub-5µH inductors and compact ceramic capacitors for minimal board area |
| Max Output Voltage | 40V - supports high-voltage boost, SEPIC, and flyback topologies without external HV components | Input Voltage Range | 2.4V to 16V - compatible with single Li-ion (2.6–4.2V), 4-cell alkaline (4–6.5V), and 5V rail inputs |
| Feedback Reference | 1.255V - sets precise output voltage via standard resistor divider (VOUT = 1.255V × (1 + R1/R2)) |
| VCE(SAT) | 330mV at 1.1A - minimizes conduction loss and thermal stress in high-current boost stages |
| Shutdown Current | <1µA - preserves battery life in always-on or low-power standby systems |
| Operating Temp | –40°C to +125°C - qualified for industrial and under-hood automotive environments |
Pinout & Package
LT3467IDDB#TRMPBF uses an 8-lead (3mm × 2mm) plastic DFN package with exposed pad (Pin 9) tied to GND. Thermal resistance θJA = 80°C/W. Exposed pad must be soldered to PCB ground plane for thermal and electrical integrity.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 (FB) | Feedback input | Connects to resistor divider tap; 1.255V reference sets regulated output voltage |
| Pins 2 & 5 (GND) | Ground return | Low-impedance path for power and signal grounds; pins 2 and 5 are internally connected |
| Pins 3 & 4 (SW) | Switch collector | Drives external inductor/diode; minimize trace area to reduce EMI and switching losses |
| Pin 6 (VIN) | Input supply | Must be locally bypassed with ≥1µF ceramic capacitor placed adjacent to pin |
| Pin 7 (SS) | Soft-start control | 4µA internal current charges external capacitor; controls output voltage ramp rate and inrush |
| Pin 8 (SHDN) | Enable/disable input | ≥2.4V enables regulator; ≤0.5V shuts down with <1µA quiescent current |
Key Features
| Feature | Design Value |
|---|---|
| Dedicated soft-start pin | 4µA programmable charging current enables controlled output ramp and eliminates input inrush |
| High-voltage 42V switch | Supports 40V boost outputs and SEPIC/flyback topologies without external HV transistors |
| Low-profile DFN package | 3mm × 2mm × 0.75mm footprint with exposed thermal pad reduces board area and improves thermal dissipation |
| Current-mode PWM architecture | Delivers predictable loop response, inherent cycle-by-cycle current limiting, and stable operation across line/load |
| Wide input range | 2.4V–16V operation accommodates single Li-ion, multi-cell alkaline, and fixed 5V/12V rails |
Applications
| Portable Medical Sensors | White LED Backlighting |
|---|---|
Use Scenario: Powering handheld ultrasound probes and glucose meters requiring stable 5V/12V from single Li-ion cells. IC Role / Device Role / Timing Role: Primary boost controller generating regulated 5V at 540mA from 3.3V input with soft-start to prevent sensor reset during power-up. Use Value: 330mV VCE(SAT) and 1.3MHz switching minimize heat and enable ultra-compact 2-layer PCB layouts. |
Use Scenario: Driving parallel white LED strings in portable diagnostic displays needing 18V bias from 3.3V logic rail. IC Role / Device Role / Timing Role: High-voltage boost converter delivering 18V at 10mA in triple-output TFT-LCD bias supply with coordinated soft-start sequencing. Use Value: 40V max output rating and 1.255V precision reference ensure accurate LED current regulation across temperature. |
| Industrial IoT Gateways | xDSL Line Cards |
Use Scenario: Generating isolated 15V/–15V dual-rail supplies for RS-485 transceivers and analog front-ends in edge nodes. IC Role / Device Role / Timing Role: Core boost stage in ±15V dual-output converter with output disconnect, operating from 5V system rail. Use Value: –40°C to +125°C rating and robust current-limit protection ensure reliability in uncontrolled ambient deployments. |
Use Scenario: Providing local 40V bias for DSL line drivers in residential gateways powered by 5V USB-C adapters. IC Role / Device Role / Timing Role: High-efficiency 5V-to-40V boost converter delivering 20mA with low EMI for noise-sensitive telephony circuits. Use Value: 1.3MHz constant-frequency operation simplifies EMI filtering and meets stringent xDSL conducted emission limits. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar boost converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LT3467AIDDB#TRMPBF | 2.1MHz switching frequency, 82% max duty cycle, 430mA 5V output from 3.3V | Better suited for ultra-compact designs requiring smaller inductors (e.g., 0.9µH); lower peak output current | Select when board area is critical and 430mA 5V output suffices; verify loop stability with higher fSW |
| LT1930IS6#TRMPBF | 6-lead TSOT-23 package, same pinout, 1.2MHz fSW, 1.25V FB reference, 1.2A switch | Smaller footprint but higher θJA (165°C/W); limited to 36V output; no dedicated SS pin | Choose for legacy TSOT-23 compatibility or cost-sensitive volume production where DFN assembly is unavailable |
Compared with LT3467AIDDB#TRMPBF, the LT3467IDDB#TRMPBF offers higher 540mA output current at 3.3V input and better thermal performance in DFN, while LT1930IS6#TRMPBF trades package size for reduced feature set and thermal capability-making LT3467IDDB#TRMPBF optimal for thermally demanding, high-current boost applications.
Availability
LT3467IDDB#TRMPBF is available at Aetrix Electronics and suitable for industrial IoT gateways, portable medical sensors, TFT-LCD bias supplies, and xDSL line cards requiring stable component supply with guaranteed long-term availability and automotive-grade temperature support.
Supply support for LT3467IDDB#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 is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving industrial, automotive, communications, and healthcare markets.
The LT3467/LT3467A product line delivers highly integrated, high-voltage boost converters optimized for space-constrained, battery-powered applications requiring reliable 5V–40V outputs with programmable soft-start and wide input voltage tolerance.
FAQ
What is the maximum output voltage supported by the LT3467IDDB#TRMPBF?
The LT3467IDDB#TRMPBF supports up to 40V output in boost, SEPIC, and flyback configurations. Its internal 42V-rated NPN switch ensures safe operation with margin, and the 1.255V feedback reference allows precise setting of any output voltage using standard resistor dividers. This makes LT3467IDDB#TRMPBF suitable for high-voltage bias supplies in LCDs and telecom interfaces.
Does the LT3467IDDB#TRMPBF require an external soft-start capacitor?
Yes-the LT3467IDDB#TRMPBF requires an external capacitor on the SS pin to control startup inrush and output voltage ramp rate. A 4µA internal current charges the capacitor to 1.255V; typical values range from 10nF to 200nF. Leaving SS floating disables soft-start, which may cause excessive input current surge. The LT3467IDDB#TRMPBF datasheet specifies this behavior explicitly for reliable design.
What is the thermal performance of the LT3467IDDB#TRMPBF in its DFN package?
The LT3467IDDB#TRMPBF in the 8-lead 3mm × 2mm DFN package has θJA = 80°C/W when the exposed pad (Pin 9) is soldered to a PCB ground plane. This thermal performance enables continuous 540mA output at 5V from 3.3V input without forced air, provided adequate copper area is used. The LT3467IDDB#TRMPBF's –40°C to +125°C rating further ensures operation in thermally aggressive environments.
Can the LT3467IDDB#TRMPBF be used in SEPIC topology?
Yes-the LT3467IDDB#TRMPBF is explicitly validated for SEPIC operation in its datasheet, including a 4-cell-to-5V reference design delivering 450mA. Its 42V switch rating, current-mode control, and 1.255V feedback reference make it well-suited for non-inverting buck-boost applications requiring input/output voltage overlap. The LT3467IDDB#TRMPBF's soft-start also prevents inrush in SEPIC configurations with large input capacitance.
How does the LT3467IDDB#TRMPBF differ from the LT3467AIDDB#TRMPBF?
The LT3467IDDB#TRMPBF operates at 1.3MHz with 94% max duty cycle and delivers 540mA at 5V from 3.3V input, while the LT3467AIDDB#TRMPBF switches at 2.1MHz with 82% max duty cycle and delivers 430mA under identical conditions. Both share the same DFN package, –40°C to +125°C rating, and pinout-but the LT3467IDDB#TRMPBF prioritizes higher output current, whereas the LT3467AIDDB#TRMPBF enables smaller passive components.
LT3467IDDB#TRMPBF 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
- Topology:
- Boost, Flyback, SEPIC
- Output Type:
- Adjustable
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 2.4V
- Voltage - Input (Max):
- 16V
- Voltage - Output (Min/Fixed):
- 1.255V
- Voltage - Output (Max):
- 40V
- Current - Output:
- 1.1A
- Frequency - Switching:
- 1.3MHz
- Synchronous Rectifier:
- No
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-DFN (3x2)
LT3467IDDB#TRMPBF FAQ
1.How can I place an order for LT3467IDDB#TRMPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT3467IDDB#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 LT3467IDDB#TRMPBF reliable?
The price and inventory of LT3467IDDB#TRMPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LT3467IDDB#TRMPBF is usually 5 days.
3.What payment methods are accepted for LT3467IDDB#TRMPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT3467IDDB#TRMPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT3467IDDB#TRMPBF?
LT3467IDDB#TRMPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT3467IDDB#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 LT3467IDDB#TRMPBF?
For technical support, including LT3467IDDB#TRMPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT3467IDDB#TRMPBF requirements.
6.How does Aetrix verify that LT3467IDDB#TRMPBF is sourced from the original manufacturer or authorized distributors?
All LT3467IDDB#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 LT3467IDDB#TRMPBF meets industry standards.
7.What is the process for return or replacement of LT3467IDDB#TRMPBF?
All LT3467IDDB#TRMPBF units undergo pre-shipment inspection (PSI). If there is an issue with LT3467IDDB#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 LT3467IDDB#TRMPBF part is unused and in its original packaging.
Return procedure for LT3467IDDB#TRMPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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