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Analog Devices Inc. LT3467AEDDB#TRMPBF
- Part No.:
- LT3467AEDDB#TRMPBF
- Manufacturer:
- Analog Devices Inc.
- Package:
- 8-WFDFN Exposed Pad
- Datasheet:
-
LT3467AEDDB#TRMPBF.pdf
- Description:
- IC REG BST FLYBACK ADJ 1.1A 8DFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,240
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Product details
Overview
LT3467AEDDB#TRMPBF from Analog Devices is a 2.1MHz, 42V, 1.1A monolithic step-up DC/DC converter with integrated soft-start, housed in an 8-lead (3mm × 2mm) DFN package. It delivers 5V at up to 430mA from a 3.3V input or 15V at 135mA, features a 1.255V feedback reference, <1µA shutdown current, and supports boost, SEPIC, and flyback topologies for compact high-voltage power conversion.
For engineers reviewing the LT3467AEDDB#TRMPBF datasheet, LT3467AEDDB#TRMPBF pinout, LT3467AEDDB#TRMPBF application, or LT3467AEDDB#TRMPBF equivalent, this page provides verified specifications, validated DFN package layout guidance, confirmed 2.1MHz switching operation, soft-start capacitor design rules, and real-world output capability data for Li-ion–to-5V and 3.3V–to-15V designs.
Technical Context
The LT3467AEDDB#TRMPBF employs constant-frequency current-mode PWM control with a 2.1MHz oscillator, enabling use of sub-1µH inductors and ultra-low-profile ceramic capacitors. Its NPN bipolar switch exhibits 330mV VCE(SAT) at 1.1A and supports up to 40V output in boost configurations.
It integrates a dedicated soft-start pin (SS) sourcing 4µA to charge an external capacitor, limiting inrush current and peak switch current during startup. The feedback pin (FB) references 1.255V with ±10nA bias current, enabling precise output regulation across 2.4V–16V input range and –40°C to 85°C operating junction temperature.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Switching Frequency | 2.1MHz - enables use of 0.9µH–6.8µH inductors and reduces EMI filtering burden |
| Max Output Voltage | 40V - supports high-side boost, SEPIC, and flyback topologies 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 5V rail inputs |
| Feedback Reference | 1.255V ±1.5% - sets output voltage via R1/R2 divider; enables stable 5V, 6V, 12V, 15V, or 40V outputs |
| Shutdown Current | <1µA - preserves battery life in portable systems during standby or deep sleep modes |
| Soft-Start Control | 4µA SS pin current - allows programmable ramp rate using 10nF–200nF capacitor for controlled output rise |
| Switch VCE(SAT) | 330mV at 1.1A - minimizes conduction loss and thermal stress in high-current boost stages |
Pinout & Package
LT3467AEDDB#TRMPBF uses an 8-lead (3mm × 2mm) plastic DFN package with exposed pad (Pin 9) tied to GND and requiring PCB soldering for thermal and electrical integrity. Package height is 0.75mm max.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 (FB) | Feedback Input | Connects to resistive divider tap; regulates output by comparing against 1.255V internal reference |
| Pins 2 & 5 (GND) | Ground Return | Multiple GND pins minimize ground impedance; exposed pad (Pin 9) must be soldered to PCB ground plane |
| Pins 3 & 4 (SW) | Switch Collector | Drives external inductor/diode; high di/dt node requiring minimized trace area to reduce EMI |
| Pin 6 (VIN) | Input Supply | Accepts 2.4V–16V; requires local 1µF–4.7µF ceramic bypass capacitor placed adjacent to pin |
| Pin 7 (SS) | Soft-Start Control | Sources 4µA to external capacitor; controls output voltage ramp rate and limits inrush current |
| Pin 8 (SHDN) | Shutdown Enable | Logic-high (>2.4V) enables operation; grounded disables regulator and reduces quiescent current to <1µA |
Key Features
| Feature | Design Value |
|---|---|
| 2.1MHz fixed-frequency operation | Enables use of 0.9µH inductors and 10µF–22µF ceramic output caps-reducing board area by >40% vs 1.3MHz LT3467 |
| Dedicated soft-start pin | 4µA current source charges external capacitor to 1.255V, preventing input rail sag and switch overstress during startup |
| 42V-rated NPN switch | Supports 40V boost outputs and SEPIC/flyback topologies without external HV transistors or level-shifting circuitry |
| Low 330mV VCE(SAT) | Reduces conduction loss at 1.1A, improving efficiency by 2–4% over comparable 500mV-switch devices in 5V@430mA applications |
| Pin-for-pin compatibility with LT1930/LT1613 | Allows drop-in replacement in existing designs using same DFN footprint and pin assignments-no PCB rework required |
Applications
| Digital Camera Power Supply | White LED Backlight Driver |
|---|---|
|
Use Scenario: Generating 15V at 135mA from a 3.3V Li-ion supply to drive white LED strings in compact camera modules. IC Role / Device Role / Timing Role: Step-up DC/DC controller providing regulated high-voltage bias with fast transient response and low noise. Use Value: Achieves 15V output with 2.1MHz switching-enabling <1µH inductor and eliminating audible coil whine in image capture mode. |
Use Scenario: Powering 5V logic and analog circuitry in digital cameras using a single Li-ion cell (2.6–4.2V). IC Role / Device Role / Timing Role: Primary boost converter delivering stable 5V rail with programmable soft-start to prevent sensor reset during power-on. Use Value: Delivers 430mA at 5V from 3.3V input while maintaining >85% efficiency across full battery discharge range. |
| TFT-LCD Bias Supply | xDSL Line Power |
|
Use Scenario: Generating triple outputs (±9V, +18V) from 3.3V input for TFT-LCD panel gate drivers and source drivers. IC Role / Device Role / Timing Role: Core boost controller in multi-output flyback or charge-pump-assisted topology with synchronized soft-start sequencing. Use Value: Supports 9V/220mA, –9V/10mA, and 18V/10mA simultaneously using single IC and small magnetics due to 2.1MHz operation. |
Use Scenario: Providing isolated 40V bias for xDSL line driver amplifiers from a 5V system rail in DSLAM or CPE equipment. IC Role / Device Role / Timing Role: High-voltage boost stage feeding isolated DC/DC converter; operates in discontinuous conduction mode for stability. Use Value: Delivers 40V at 20mA with <1% output ripple using 2.7µH inductor and 1µF ceramic output cap-meeting stringent DSL spectral mask requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar step-up DC/DC converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LT3467EDDB#TRMPBF | 1.3MHz switching frequency; lower max duty cycle (94% vs 82%); identical pinout and package | Better suited for higher-current 5V outputs (540mA @ 3.3V) but requires larger inductors (≥4.7µH) | Select when prioritizing output current over board area; verify inductor saturation rating for 1.3MHz operation |
| LT1930EDDB#TRMPBF | No soft-start pin; 1.2MHz switching; 40V switch rating; same DFN-8 package and pinout | Lacks programmable startup control-requires external RC network for inrush limiting in sensitive systems | Choose for cost-sensitive, non-battery applications where soft-start is not required and 1.2MHz EMI profile is acceptable |
Compared with LT3467EDDB#TRMPBF, the LT3467AEDDB#TRMPBF trades peak output current for smaller passive components and tighter EMI control; versus LT1930EDDB#TRMPBF, it adds essential soft-start functionality for reliable battery-powered startup without external circuitry.
Availability
LT3467AEDDB#TRMPBF is available at Aetrix Electronics and suitable for digital camera power supplies, white LED backlight drivers, TFT-LCD bias generation, and xDSL line power applications requiring stable component supply, automotive-grade reliability (AEC-Q100 qualified variants exist), and consistent DFN-8 sourcing.
Supply support for LT3467AEDDB#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. is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving industrial, communications, automotive, and consumer markets.
The LT3467/LT3467A product line delivers compact, high-frequency boost converters optimized for space-constrained portable electronics requiring regulated high-voltage rails from single-cell batteries or low-voltage system supplies.
FAQ
What is the maximum output voltage achievable with the LT3467AEDDB#TRMPBF?
The LT3467AEDDB#TRMPBF supports up to 40V output in boost configuration, limited by its 42V-rated internal NPN switch. This enables direct generation of common high-voltage rails like 15V, 24V, or 40V without external HV transistors. Output voltage is set by the FB resistive divider, and stability must be verified per application using compensation guidelines in the datasheet.
Does the LT3467AEDDB#TRMPBF require an external soft-start capacitor?
Yes-the LT3467AEDDB#TRMPBF requires an external capacitor on the SS pin to control startup inrush current. A 47nF capacitor yields typical startup time; values from 10nF to 200nF are supported. Leaving SS floating disables soft-start, risking high peak currents and potential switch overstress during power-up.
Can the LT3467AEDDB#TRMPBF be used in SEPIC topology?
Yes-the LT3467AEDDB#TRMPBF is explicitly validated for SEPIC operation in its datasheet, delivering 5V at 450mA from a 4–6.5V four-cell alkaline input. Its 42V switch rating and current-mode control ensure stable operation; layout must minimize SW node loop area and use coupled inductors or tightly matched discrete inductors for optimal performance.
What is the recommended inductor value for a 3.3V-to-5V application using LT3467AEDDB#TRMPBF?
For 3.3V-to-5V boost with the LT3467AEDDB#TRMPBF, a 0.9µH to 1.5µH shielded power inductor rated for ≥1.2A DC current is recommended. The datasheet validates 0.9µH (FDK MIPW3226D0R9M) delivering 360mA at 2.6V input and 600mA at 4.2V input. Lower inductance improves transient response but increases peak switch current.
Is the LT3467AEDDB#TRMPBF pin-compatible with the LT1930?
Yes-the LT3467AEDDB#TRMPBF is pin-for-pin compatible with the LT1930 and LT1613 in the DFN-8 package, sharing identical pin functions (FB, GND, SW, SHDN, SS, VIN). This allows direct substitution in existing layouts, though designers must verify that 2.1MHz operation meets EMI requirements and that soft-start behavior aligns with system needs.
LT3467AEDDB#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:
- 2.1MHz
- Synchronous Rectifier:
- No
- Operating Temperature:
- -40°C ~ 85°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-DFN (3x2)
LT3467AEDDB#TRMPBF FAQ
1.How can I place an order for LT3467AEDDB#TRMPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT3467AEDDB#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 LT3467AEDDB#TRMPBF reliable?
The price and inventory of LT3467AEDDB#TRMPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LT3467AEDDB#TRMPBF is usually 5 days.
3.What payment methods are accepted for LT3467AEDDB#TRMPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT3467AEDDB#TRMPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT3467AEDDB#TRMPBF?
LT3467AEDDB#TRMPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT3467AEDDB#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 LT3467AEDDB#TRMPBF?
For technical support, including LT3467AEDDB#TRMPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT3467AEDDB#TRMPBF requirements.
6.How does Aetrix verify that LT3467AEDDB#TRMPBF is sourced from the original manufacturer or authorized distributors?
All LT3467AEDDB#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 LT3467AEDDB#TRMPBF meets industry standards.
7.What is the process for return or replacement of LT3467AEDDB#TRMPBF?
All LT3467AEDDB#TRMPBF units undergo pre-shipment inspection (PSI). If there is an issue with LT3467AEDDB#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 LT3467AEDDB#TRMPBF part is unused and in its original packaging.
Return procedure for LT3467AEDDB#TRMPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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