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Analog Devices Inc. LT3467EDDB#TRPBF
- Part No.:
- LT3467EDDB#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Package:
- 8-WFDFN Exposed Pad
- Datasheet:
-
LT3467EDDB#TRPBF.pdf
- Description:
- IC REG BST FLYBACK ADJ 1.1A 8DFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,247
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Product details
Overview
LT3467EDDB#TRPBF from Analog Devices is a 1.3MHz, 42V, 1.1A monolithic step-up DC/DC converter with integrated soft-start and bipolar switch in an 8-lead (3mm × 2mm) DFN package. It delivers 5V at 540mA from a 3.3V input or 12V at 270mA from a 5V input, supporting boost, SEPIC, and flyback topologies for compact power conversion in space-constrained applications.
For engineers reviewing the LT3467EDDB#TRPBF datasheet, LT3467EDDB#TRPBF pinout, LT3467EDDB#TRPBF application, or LT3467EDDB#TRPBF equivalent, key selection criteria include switching frequency (1.3MHz), maximum output voltage (40V), input voltage range (2.4V–16V), soft-start programmability, and thermal performance in the exposed-pad DFN-8 package.
Technical Context
The LT3467EDDB#TRPBF employs constant-frequency current-mode PWM control with a 1.255V feedback reference and internal 250kΩ soft-start charging resistor. Its NPN bipolar switch features 330mV VCE(SAT) at 1.1A, enabling high efficiency in low-input-voltage, high-output-voltage boost configurations.
It supports duty cycles up to 94% and integrates protection functions including switch current limiting (typ. 1.4A), shutdown with <1µA quiescent current, and thermal shutdown at 125°C junction temperature. The device operates across –40°C to +85°C and is rated for 42V SW pin voltage.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Switching Frequency | 1.3MHz - enables use of sub-5µH inductors and low-profile ceramic capacitors for ultra-compact designs. |
| Max Output Voltage | 40V - supports high-voltage bias supplies for TFT-LCD, xDSL, and industrial sensors without external HV components. |
| Input Voltage Range | 2.4V to 16V - accommodates single Li-ion (2.6–4.2V), 4-cell alkaline (4–6.5V), or regulated 5V/12V rails. |
| Feedback Reference | 1.255V ±2.5% - sets precise output regulation via external resistor divider; enables stable 5V, 6V, 12V, 15V, or 40V outputs. |
| Soft-Start Current | 4µA - charges external capacitor to 1.255V, controlling output voltage ramp rate and limiting inrush current during startup. |
| Switch VCE(SAT) | 330mV at 1.1A - minimizes conduction loss and improves efficiency in high-current boost stages. |
| Shutdown Current | <1µA - preserves battery life in portable equipment during standby or sleep modes. |
Pinout & Package
LT3467EDDB#TRPBF uses an 8-lead (3mm × 2mm) plastic DFN package with exposed pad (Pin 9) soldered to PCB ground for thermal and electrical integrity. Pin 1 marked by bar; top view orientation per JEDEC MO-229.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| FB (Pin 1) | Feedback input | Connects to resistor divider tap; regulates output by comparing against 1.255V internal reference. |
| GND (Pins 2, 5, 9) | Ground reference | Pins 2 and 5 are signal GND; Pin 9 is exposed thermal pad-must be soldered to large PCB ground plane. |
| SW (Pins 3, 4) | Switch collector node | Drives external inductor/diode; handles up to 42V transient voltage and 1.1A peak current. |
| VIN (Pin 6) | Input supply | Accepts 2.4–16V; requires local 1–4.7µF ceramic bypass capacitor placed adjacent to pin. |
| SS (Pin 7) | Soft-start control | Sinks 4µA to charge external capacitor; controls output voltage rise time and limits inrush current. |
| SHDN (Pin 8) | Enable/disable control | Logic-high ≥2.4V enables operation; logic-low ≤0.5V disables switch and reduces IQ to <1µA. |
Key Features
| Feature | Design Value |
|---|---|
| 1.3MHz fixed-frequency operation | Enables use of 2.2–4.7µH inductors and 1–15µF ceramic output capacitors-reducing board area by >40% vs lower-frequency converters. |
| Dedicated soft-start pin | Programmable startup ramp eliminates input surge current and prevents switch overstress in high-VOUT applications (e.g., 40V boost). |
| 42V-rated bipolar switch | Supports output voltages up to 40V in boost mode and enables SEPIC/flyback topologies without external HV transistors. |
| Low 330mV VCE(SAT) at 1.1A | Reduces conduction loss by ~35% vs comparable 500mV switches, improving full-load efficiency by 2–4 percentage points. |
| Pin-for-pin compatibility with LT1930/LT1613 | Allows drop-in replacement in existing designs using those parts-no layout or BOM changes required. |
Applications
| Lithium-Ion to 5V Boost Converter | TFT-LCD Bias Supply |
|---|---|
Use Scenario: Powering USB peripherals or logic rails from single-cell Li-ion batteries (2.6–4.2V). IC Role / Device Role / Timing Role: Primary DC/DC boost controller generating regulated 5V output with soft-start to prevent battery sag. Use Value: Delivers 540mA at 5V from 3.3V input with >85% efficiency; 1.3MHz switching allows 2.7µH inductor and 4.7µF ceramic output cap. |
Use Scenario: Generating dual-rail ±9V and 18V for TFT-LCD panel gate drivers and source drivers. IC Role / Device Role / Timing Role: High-voltage boost controller driving multi-winding transformer or charge-pump network. Use Value: Supports 9V/18V/–9V triple outputs with soft-start sequencing; 40V SW rating handles reflected flyback voltages safely. |
| SEPIC Power Supply for 4-Cell Alkaline | xDSL Line Card Power |
Use Scenario: Providing regulated 5V from aging 4-cell alkaline stack (4–6.5V) with declining voltage over discharge. IC Role / Device Role / Timing Role: SEPIC topology controller maintaining regulation as input drops below output voltage. Use Value: Delivers 450mA at 5V from 6.5V input; wide 2.4–16V input range accommodates full battery discharge curve. |
Use Scenario: Generating isolated 40V bias for DSL line drivers in telecom access equipment. IC Role / Device Role / Timing Role: High-voltage boost converter supplying gate drive or analog front-end circuitry. Use Value: Achieves 40V output at 20mA with 1.3MHz operation minimizing EMI filtering requirements in dense line cards. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar boost converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LT3467AEDDB#TRPBF | 2.1MHz switching frequency; 82% max duty cycle; 430mA @ 5V from 3.3V input. | Better suited for ultra-compact designs requiring <1µH inductors and tighter EMI control. | Select when board space is critical and input-to-output voltage ratio permits higher frequency operation. |
| LT1930ES6#TRPBF | Same 1.3MHz frequency and pinout; 36V switch rating; 600mA switch current; no dedicated SS pin. | Lacks programmable soft-start; requires RC network on FB for startup control; lower max output voltage. | Choose only if soft-start is not required and 36V output ceiling is acceptable. |
Compared with LT3467AEDDB#TRPBF, the LT3467EDDB#TRPBF offers higher current capability (540mA vs 430mA at 5V/3.3V) and greater output voltage headroom (40V vs 36V), while LT1930ES6#TRPBF trades soft-start functionality for legacy compatibility in cost-sensitive, non-battery applications.
Availability
LT3467EDDB#TRPBF is available at Aetrix Electronics and suitable for lithium-ion power banks, TFT-LCD bias generation, and xDSL line card designs requiring stable component supply, automotive-grade reliability, and long-term production continuity.
Supply support for LT3467EDDB#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 industrial, communications, automotive, and healthcare markets.
The LT3467 series belongs to Analog Devices' monolithic DC/DC converter product line, designed specifically for high-efficiency, high-voltage boost and SEPIC applications in portable and space-constrained systems.
FAQ
What is the maximum output voltage achievable with the LT3467EDDB#TRPBF?
The LT3467EDDB#TRPBF supports up to 40V output in boost configuration, limited by its 42V-rated internal switch and safe operating area. This enables direct generation of high-voltage rails for LCD bias, sensor excitation, or telecom interfaces without external HV components. The actual achievable output depends on external diode, inductor, and capacitor ratings.
Does the LT3467EDDB#TRPBF require an external soft-start capacitor?
Yes-the LT3467EDDB#TRPBF requires an external capacitor on the SS pin to control startup inrush current and prevent switch overstress. A typical value is 47nF, which yields ~15ms ramp time to 1.255V. Leaving SS floating disables soft-start, resulting in uncontrolled current surge during turn-on.
Can the LT3467EDDB#TRPBF be used in SEPIC topology?
Yes-the LT3467EDDB#TRPBF is explicitly validated for SEPIC operation in its datasheet, delivering 5V at 450mA from a 4–6.5V 4-cell alkaline input. Its 42V switch rating and current-mode control ensure stable regulation even when input voltage falls below output voltage.
What is the thermal performance of the LT3467EDDB#TRPBF in its DFN package?
The LT3467EDDB#TRPBF in the 8-lead DFN package has θJA = 80°C/W when the exposed pad (Pin 9) is soldered to a 1-in² copper area. With proper PCB thermal design, it sustains continuous 540mA output at 5V from 3.3V input without exceeding 125°C junction temperature under ambient conditions ≤85°C.
Is the LT3467EDDB#TRPBF pin-compatible with other members of the LT3467 family?
Yes-the LT3467EDDB#TRPBF shares identical pinout and footprint with LT3467AEDDB#TRPBF, LT3467IDDB#TRPBF, and LT3467AIDDB#TRPBF in the DFN-8 package. Functionally, it is also pin-compatible with LT1930 and LT1613, enabling direct substitution in existing layouts without redesign.
LT3467EDDB#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
- 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 ~ 85°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-DFN (3x2)
LT3467EDDB#TRPBF FAQ
1.How can I place an order for LT3467EDDB#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT3467EDDB#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 LT3467EDDB#TRPBF reliable?
The price and inventory of LT3467EDDB#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LT3467EDDB#TRPBF is usually 5 days.
3.What payment methods are accepted for LT3467EDDB#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT3467EDDB#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT3467EDDB#TRPBF?
LT3467EDDB#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT3467EDDB#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 LT3467EDDB#TRPBF?
For technical support, including LT3467EDDB#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT3467EDDB#TRPBF requirements.
6.How does Aetrix verify that LT3467EDDB#TRPBF is sourced from the original manufacturer or authorized distributors?
All LT3467EDDB#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 LT3467EDDB#TRPBF meets industry standards.
7.What is the process for return or replacement of LT3467EDDB#TRPBF?
All LT3467EDDB#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LT3467EDDB#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 LT3467EDDB#TRPBF part is unused and in its original packaging.
Return procedure for LT3467EDDB#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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