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Analog Devices Inc. LT3467EDDB#TRMPBF
- Part No.:
- LT3467EDDB#TRMPBF
- Manufacturer:
- Analog Devices Inc.
- Package:
- 8-WFDFN Exposed Pad
- Datasheet:
-
LT3467EDDB#TRMPBF.pdf
- Description:
- IC REG BST FLYBACK ADJ 1.1A 8DFN
- Quantity:
- Payment:
- Shipping:
Inventory:460
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Product details
Overview
LT3467EDDB#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, constant-frequency current-mode PWM control, and low 330mV VCE(SAT) bipolar switch. It delivers 5V at 540mA from a 3.3V input or 12V at 270mA from a 5V input, targeting space-constrained boost, SEPIC, and flyback power supplies in portable electronics.
For engineers reviewing the LT3467EDDB#TRMPBF datasheet, LT3467EDDB#TRMPBF pinout, LT3467EDDB#TRMPBF application, or LT3467EDDB#TRMPBF equivalent, key selection criteria include its 1.3MHz switching frequency for compact magnetics, programmable soft-start via external capacitor, 2.4V–16V input range, 42V switch rating, and guaranteed operation from –40°C to +85°C in the DFN package.
Technical Context
The LT3467EDDB#TRMPBF implements a constant-frequency current-mode PWM architecture with an internal 1.3MHz oscillator, enabling predictable output noise and stable loop compensation. Its NPN bipolar switch features 330mV VCE(SAT) at 1.1A, supporting high-efficiency conversion up to 40V output in boost topologies.
It integrates a dedicated soft-start pin (SS) sourcing 4µA to charge an external capacitor, controlling output voltage ramp rate and limiting inrush current. The feedback pin (FB) regulates output via a 1.255V reference, and shutdown (SHDN) enables <1µA quiescent current when pulled low.
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 PCB layouts. |
| Input Voltage Range | 2.4V to 16V - Supports single Li-ion (2.6–4.2V), multi-cell alkaline (4–6.5V), and fixed 5V/12V rails without external regulators. |
| Switch Voltage Rating | 42V - Allows reliable 40V boost, SEPIC, and flyback designs with margin for transient spikes and diode drop. |
| Feedback Reference | 1.255V - Sets precise output voltage using standard resistor dividers; tolerance ±1.5% over temperature ensures stable regulation. |
| Soft-Start Current | 4µA - Charges external SS capacitor linearly to control output rise time and prevent input supply sag during startup. |
| Quiescent Current | 2mA (active), <1µA (shutdown) - Minimizes battery drain in always-on or sleep-mode portable systems. |
| Max Duty Cycle | 94% - Supports high step-up ratios (e.g., 3.3V → 5V, 5V → 40V) while maintaining continuous conduction mode stability. |
Pinout & Package
LT3467EDDB#TRMPBF uses an 8-lead (3mm × 2mm) plastic DFN package with exposed pad (Pin 9) soldered to PCB ground for thermal and electrical integrity. Pin pitch is 0.5mm; package height is 0.75mm.
| 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 | Low-impedance return path for power and signal; exposed pad (Pin 9) must be soldered to PCB ground plane. |
| Pins 3 & 4 (SW) | Switch Collector | Drives external inductor/diode; high dv/dt node requiring minimal trace area to reduce EMI radiation. |
| Pin 6 (VIN) | Input Supply | Accepts 2.4–16V input; requires local 1–4.7µF ceramic bypass capacitor placed adjacent to pin. |
| Pin 7 (SS) | Soft-Start Control | Sources 4µA to external capacitor; voltage ramp on this pin directly limits peak switch current during startup. |
| Pin 8 (SHDN) | Shutdown Enable | Logic-high (>2.4V) enables regulator; logic-low (<0.5V) disables switching and reduces IQ to <1µA. |
Key Features
| Feature | Design Value |
|---|---|
| 1.3MHz fixed-frequency PWM | Enables consistent EMI profile and simplifies filtering; supports inductors as small as 2.7µH for 5V output. |
| Integrated soft-start | Programmable via single external capacitor; eliminates input current surges and improves system reliability during cold start. |
| 42V bipolar switch with 330mV VCE(SAT) | Delivers high current efficiency in small footprint; avoids MOSFET gate drive complexity while sustaining 40V output. |
| Wide 2.4V–16V input range | Operates directly from single Li-ion, 4-cell alkaline, or industrial 5V/12V rails-no pre-regulation needed. |
| –40°C to +85°C operating junction range | Qualified for commercial and industrial environments; validated across full temperature range per Rev. H datasheet. |
Applications
| Digital Camera Power Supply | White LED Backlight Driver |
|---|---|
Use Scenario: Generating 5V/12V bias rails and 18V–23V TFT-LCD panel supplies from a 3.3V system rail in compact camera modules. IC Role / Device Role / Timing Role: Primary step-up controller implementing triple-output SEPIC or flyback topology with independent soft-start sequencing. Use Value: Delivers 220mA at 9V and 10mA at ±9V from 3.3V input using only one IC and tiny passives-reducing BOM count and board area by >40% vs discrete solutions. |
Use Scenario: Driving parallel white LED strings requiring stable 24–36V output from a 3.3V or 5V battery source in handheld medical or consumer devices. IC Role / Device Role / Timing Role: Constant-current-capable boost converter with analog dimming interface via FB pin modulation. Use Value: Achieves >85% efficiency at 360mA output while maintaining <1% output ripple-enabling flicker-free illumination without external LDO post-regulation. |
| Portable Medical Diagnostic Equipment | xDSL Line Power Supply |
Use Scenario: Providing isolated ±15V dual-rail supplies for op-amp front-ends and ADC drivers in battery-powered ultrasound or glucose monitors. IC Role / Device Role / Timing Role: Dual-output boost controller with output disconnect capability via SHDN pin coordination. Use Value: Generates ±15V at 100mA each with <50mV cross-regulation error and <10µs shutdown response-meeting IEC 60601 leakage and safety timing requirements. |
Use Scenario: Generating 40V bias for DSL line drivers from a 5V system supply in residential gateway modems with strict size constraints. IC Role / Device Role / Timing Role: High-voltage boost converter operating in discontinuous conduction mode with programmable soft-start for surge immunity. Use Value: Delivers 20mA at 40V with <100mV output droop under load transients-ensuring stable line driver performance across temperature and aging. |
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 |
|---|---|---|---|
| LT3467AEDDB#TRMPBF | 2.1MHz switching frequency, 88% max duty cycle, 430mA @ 5V from 3.3V input | Better suited for ultra-compact designs requiring <1µH inductors; lower output current capability at same input voltage | Select when board space is critical and output current ≤430mA suffices; verify layout for higher-frequency EMI mitigation. |
| LT1930ES6#TRMPBF | 6-lead TSOT-23 package, 1.2MHz, 36V switch, 1.1A, no dedicated SS pin (soft-start implemented via FB capacitor) | Lower pin count and cost; lacks programmable soft-start-requires external RC network for controlled startup | Choose for legacy designs or cost-sensitive applications where SS timing is less critical and DFN thermal performance is not required. |
Compared with LT3467AEDDB#TRMPBF and LT1930ES6#TRMPBF, the LT3467EDDB#TRMPBF offers optimal balance of 1.3MHz switching speed, 540mA output capability from 3.3V, and true programmable soft-start-making it preferred for new designs needing robust startup control and mid-range power density.
Availability
LT3467EDDB#TRMPBF is available at Aetrix Electronics and suitable for digital camera power supplies, white LED backlight drivers, portable medical diagnostic equipment, and xDSL line power supplies requiring stable component supply, long-term lifecycle support, and automotive-grade reliability documentation.
Supply support for LT3467EDDB#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 precision instrumentation, communications, and industrial markets since 1965.
The LT3467 product line delivers monolithic, high-voltage boost converters optimized for space-constrained portable and industrial power applications-designed to replace multi-component discrete solutions with integrated switching, control, and protection functions.
FAQ
What is the maximum output voltage achievable with the LT3467EDDB#TRMPBF?
The LT3467EDDB#TRMPBF supports up to 40V output voltage, enabled by its 42V-rated internal bipolar switch. This rating includes margin for diode forward voltage drop and transient spikes, making it suitable for boost, SEPIC, and flyback topologies where output exceeds input by large ratios-such as generating 40V from a 5V rail in xDSL line drivers.
Does the LT3467EDDB#TRMPBF require an external soft-start capacitor?
Yes-the LT3467EDDB#TRMPBF requires an external capacitor on the SS pin to implement programmable soft-start. A typical value ranges from 10nF to 200nF; the internal 4µA current source charges this capacitor to 1.255V, directly controlling output voltage ramp rate and peak switch current during startup. Leaving SS floating disables soft-start.
Can the LT3467EDDB#TRMPBF operate from a single Li-ion cell?
Yes-the LT3467EDDB#TRMPBF operates from 2.4V minimum input, fully supporting single Li-ion cells (2.6V–4.2V). In a typical 3.3V-to-5V boost configuration, it delivers up to 540mA at VIN = 3.3V and maintains >85% efficiency across the full cell voltage range, as verified in Figure 2 and TA01b of the Rev. H datasheet.
What package type and thermal characteristics does the LT3467EDDB#TRMPBF use?
The LT3467EDDB#TRMPBF uses an 8-lead (3mm × 2mm) plastic DFN package with exposed thermal pad (Pin 9). Its thermal resistance is θJA = 80°C/W when properly soldered to a 1-in² copper area. The exposed pad must be connected to PCB ground for both thermal dissipation and electrical stability, as specified in the DDB package drawing.
How does the LT3467EDDB#TRMPBF differ from the LT3467AEDDB#TRMPBF?
The LT3467EDDB#TRMPBF switches at 1.3MHz and supports up to 540mA output at 5V from 3.3V input, while the LT3467AEDDB#TRMPBF operates at 2.1MHz with reduced max output (430mA under same conditions) and lower max duty cycle (88%). Both share identical pinout, package, and feature set-differences are strictly in frequency, current capability, and duty cycle limits.
LT3467EDDB#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 ~ 85°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-DFN (3x2)
LT3467EDDB#TRMPBF FAQ
1.How can I place an order for LT3467EDDB#TRMPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT3467EDDB#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 LT3467EDDB#TRMPBF reliable?
The price and inventory of LT3467EDDB#TRMPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LT3467EDDB#TRMPBF is usually 5 days.
3.What payment methods are accepted for LT3467EDDB#TRMPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT3467EDDB#TRMPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT3467EDDB#TRMPBF?
LT3467EDDB#TRMPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT3467EDDB#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 LT3467EDDB#TRMPBF?
For technical support, including LT3467EDDB#TRMPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT3467EDDB#TRMPBF requirements.
6.How does Aetrix verify that LT3467EDDB#TRMPBF is sourced from the original manufacturer or authorized distributors?
All LT3467EDDB#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 LT3467EDDB#TRMPBF meets industry standards.
7.What is the process for return or replacement of LT3467EDDB#TRMPBF?
All LT3467EDDB#TRMPBF units undergo pre-shipment inspection (PSI). If there is an issue with LT3467EDDB#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 LT3467EDDB#TRMPBF part is unused and in its original packaging.
Return procedure for LT3467EDDB#TRMPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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