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Analog Devices Inc. LT3467IS6#TRMPBF
- Part No.:
- LT3467IS6#TRMPBF
- Manufacturer:
- Analog Devices Inc.
- Package:
- SOT-23-6 Thin, TSOT-23-6
- Datasheet:
-
LT3467IS6#TRMPBF.pdf
- Description:
- IC REG BST FLYBACK ADJ TSOT23-6
- Quantity:
- Payment:
- Shipping:
Inventory:684
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Product details
Overview
LT3467IS6#TRMPBF from Analog Devices is a 1.3MHz, 42V, 1.1A monolithic step-up DC/DC converter in a 6-lead TSOT-23 package, featuring integrated soft-start, constant-frequency current-mode PWM control, and a low VCE(SAT) bipolar switch (330mV at 1.1A). It delivers 5V at 450mA from four alkaline cells or 5V at 540mA from 3.3V input in SEPIC topology for portable power rails.
For engineers reviewing the LT3467IS6#TRMPBF datasheet, LT3467IS6#TRMPBF pinout, LT3467IS6#TRMPBF application, or LT3467IS6#TRMPBF equivalent, key selection criteria include switching frequency (1.3MHz), maximum output voltage (40V), input range (2.4V–16V), soft-start programmability, and thermal performance in the –40°C to 125°C industrial temperature grade.
Technical Context
The LT3467IS6#TRMPBF employs a constant-frequency current-mode PWM architecture with an internal 1.255V reference and error amplifier driving a 1.3MHz oscillator. Its NPN bipolar switch enables high-current operation with low conduction loss (330mV VCE(SAT) at 1.1A) and supports boost, SEPIC, and flyback topologies up to 40V output.
Soft-start is implemented via a dedicated SS pin charged by a 4µA internal current source to 1.255V through an external capacitor, limiting inrush current and peak switch current during startup. The device operates across –40°C to 125°C (I-grade) and features <1µA shutdown current and 88% typical maximum duty cycle.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Switching Frequency | 1.3MHz - enables use of sub-10µH inductors and compact ceramic capacitors for space-constrained designs. |
| Max Output Voltage | 40V - supports high-voltage bias supplies for TFT-LCD, xDSL, and industrial sensors without external level-shifting. |
| Input Voltage Range | 2.4V to 16V - accommodates single Li-ion (2.6–4.2V), multi-cell alkaline (4–6.5V), or 5V/12V system rails. |
| Feedback Reference | 1.255V - sets precise output regulation via external resistor divider; tolerance ±1.2% over full temperature range. |
| Quiescent Current | 2mA (active), <1µA (shutdown) - minimizes battery drain in always-on or low-power wake-up systems. |
| Switch VCE(SAT) | 330mV at 1.1A - reduces conduction loss and thermal stress, enabling >85% efficiency at 500mA load from 3.3V input. |
| Soft-Start Control | Dedicated SS pin with 4µA charging current - allows programmable startup ramp rate using 10nF–200nF capacitor to limit inrush and prevent overshoot. |
Pinout & Package
LT3467IS6#TRMPBF uses a 6-lead Plastic TSOT-23 package (1mm height, JEDEC MO-193), rated for –40°C to 125°C junction temperature (θJA = 165°C/W).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| SW (Pin 1) | Switch Collector | Connects to inductor/diode node; high dv/dt node requiring minimal trace area to reduce EMI and switching losses. |
| GND (Pin 2) | Power Ground | Primary return path for switch current and IC ground; must tie directly to local ground plane for stability and thermal dissipation. |
| FB (Pin 3) | Feedback Input | Senses output voltage via resistive divider; high-impedance input (50nA bias) minimizing divider current error. |
| VIN (Pin 6) | Input Supply | Accepts 2.4–16V input; requires local 1–4.7µF ceramic bypass capacitor placed adjacent to pin. |
| SS (Pin 5) | Soft-Start Control | Charged by internal 4µA current source to 1.255V; capacitor value (e.g., 47nF) sets startup time and inrush current limit. |
| SHDN (Pin 4) | Shutdown Enable | Logic-level input: ≥2.4V enables regulator, ≤0.5V disables with <1µA quiescent draw; no pull-up required. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated 42V, 1.1A NPN switch | Eliminates external transistor and driver, reducing BOM count and PCB footprint in 6-pin SOT-23. |
| Programmable soft-start | Prevents input voltage sag and output overshoot during startup-critical for powering sensitive analog circuits or LEDs. |
| Constant-frequency current-mode control | Delivers predictable noise spectrum centered at 1.3MHz, simplifying EMI filtering with small LC components. |
| Wide 2.4V–16V input range | Supports direct operation from single Li-ion, 3.3V/5V system rails, or multi-cell batteries without pre-regulation. |
| Low 330mV VCE(SAT) at 1.1A | Reduces conduction loss by >40% vs. comparable MOSFET-based regulators, improving thermal margin in sealed enclosures. |
Applications
| Digital Camera Power Supply | White LED Backlight Driver |
|---|---|
Use Scenario: Generating stable 5V or 12V rail from a single Li-ion cell (2.6–4.2V) to power image sensor, ISP, and memory in compact cameras. IC Role / Device Role / Timing Role: Primary boost converter delivering regulated output with fast transient response and low noise for analog signal chain integrity. Use Value: Enables 5V at 540mA from 3.3V input, supporting high-resolution sensor burst modes while maintaining <1% output ripple. | Use Scenario: Driving parallel white LED strings (e.g., 3× LEDs @ 20mA each) requiring ~12V from a 3.3V microcontroller supply. IC Role / Device Role / Timing Role: Constant-current-capable boost controller with adjustable output voltage and soft-start to prevent LED flash during power-on. Use Value: Delivers 12V at 270mA from 5V input with <1µA shutdown current, extending battery life in handheld displays. |
| TFT-LCD Bias Supply | xDSL Line Card Power |
Use Scenario: Generating triple outputs (+9V, –9V, +18V) for TFT-LCD gate drivers and source drivers in automotive infotainment panels. IC Role / Device Role / Timing Role: Core boost stage in charge-pump-assisted topology, providing primary high-voltage rail with tight regulation and low EMI. Use Value: Supports 9V @ 220mA and –9V @ 10mA simultaneously using single inductor, reducing component count vs. discrete solutions. | Use Scenario: Generating isolated 40V bias for DSL line drivers and analog front-end circuitry in broadband access equipment. IC Role / Device Role / Timing Role: High-voltage boost converter operating in discontinuous conduction mode to meet stringent EN55022 conducted emissions limits. Use Value: Achieves 40V @ 20mA from 5V input with 88% max duty cycle and 42V-rated switch, eliminating need for external HV transistors. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar boost converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LT3467AIS6#TRMPBF | 2.1MHz switching frequency, 82% max duty cycle, 430mA output at 3.3V→5V | Better suited for ultra-compact layouts requiring <1µH inductors; lower output current capability at same input | Select when board space is critical and 430mA 5V output suffices; verify loop stability with higher fSW. |
| LT1930IS6#TRMPBF | Pin-compatible, 1.2MHz fSW, 36V switch rating, 600mA IOUT at 3.3V→5V | Lower max output voltage (36V vs. 40V); slightly higher VCE(SAT) (400mV) | Use where 36V output ceiling is acceptable and legacy design reuse is prioritized over 40V headroom. |
Compared with LT3467AIS6#TRMPBF and LT1930IS6#TRMPBF, the LT3467IS6#TRMPBF offers the highest output voltage capability (40V), best current drive (540mA at 3.3V→5V), and lowest conduction loss (330mV VCE(SAT)), making it optimal for high-efficiency, high-voltage industrial and medical boost applications.
Availability
LT3467IS6#TRMPBF is available at Aetrix Electronics and suitable for digital camera power supplies, white LED backlight drivers, TFT-LCD bias generation, and xDSL line card power requiring stable component supply across industrial temperature ranges.
Supply support for LT3467IS6#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.
The LT3467 family is designed for compact, high-efficiency DC/DC conversion in space- and thermal-constrained portable and industrial systems, emphasizing robustness, wide input range, and integrated soft-start for reliable power-up sequencing.
FAQ
What is the maximum output voltage achievable with the LT3467IS6#TRMPBF?
The LT3467IS6#TRMPBF supports up to 40V output voltage in boost configuration, enabled by its 42V-rated internal NPN switch. This allows direct generation of high-bias rails for TFT-LCD panels, xDSL line drivers, or industrial sensors without cascaded converters. Operation beyond 40V requires external clamping or topology modification and is not supported per datasheet specifications.
Does the LT3467IS6#TRMPBF require an external soft-start capacitor?
Yes-the LT3467IS6#TRMPBF requires an external capacitor on the SS pin to implement programmable soft-start. A typical value is 47nF, which charges to 1.255V via the internal 4µA current source, controlling output voltage ramp rate and limiting inrush current. Leaving SS floating disables soft-start, potentially causing output overshoot or excessive input current during startup.
What is the recommended inductor value for a 3.3V-to-5V boost application using the LT3467IS6#TRMPBF?
For a 3.3V-to-5V boost application, the LT3467IS6#TRMPBF datasheet recommends a 2.7µH inductor (e.g., Sumida CR43-2R7) rated for ≥1.2A saturation current and low DCR. This value balances size, efficiency (>85%), and transient response. Inductors between 1.5µH and 4.7µH are acceptable depending on ripple and load requirements.
Can the LT3467IS6#TRMPBF be used in SEPIC topology?
Yes-the LT3467IS6#TRMPBF is explicitly validated for SEPIC operation in the datasheet, including a 4-cell-to-5V example delivering 450mA. Its 42V switch rating, current-mode control, and 88% max duty cycle support stable SEPIC operation. External component selection (e.g., coupled inductors, diode voltage rating) must follow the recommended layout and compensation guidelines.
What is the operating temperature range for the LT3467IS6#TRMPBF?
The LT3467IS6#TRMPBF is specified for an industrial operating junction temperature range of –40°C to 125°C (I-grade), as indicated by the "I" in the part number. This makes it suitable for under-hood automotive modules, industrial PLCs, and medical equipment where extended thermal performance is required.
LT3467IS6#TRMPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- SOT-23-6 Thin, TSOT-23-6
- 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:
- TSOT-23-6
LT3467IS6#TRMPBF FAQ
1.How can I place an order for LT3467IS6#TRMPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT3467IS6#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 LT3467IS6#TRMPBF reliable?
The price and inventory of LT3467IS6#TRMPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LT3467IS6#TRMPBF is usually 5 days.
3.What payment methods are accepted for LT3467IS6#TRMPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT3467IS6#TRMPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT3467IS6#TRMPBF?
LT3467IS6#TRMPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT3467IS6#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 LT3467IS6#TRMPBF?
For technical support, including LT3467IS6#TRMPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT3467IS6#TRMPBF requirements.
6.How does Aetrix verify that LT3467IS6#TRMPBF is sourced from the original manufacturer or authorized distributors?
All LT3467IS6#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 LT3467IS6#TRMPBF meets industry standards.
7.What is the process for return or replacement of LT3467IS6#TRMPBF?
All LT3467IS6#TRMPBF units undergo pre-shipment inspection (PSI). If there is an issue with LT3467IS6#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 LT3467IS6#TRMPBF part is unused and in its original packaging.
Return procedure for LT3467IS6#TRMPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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