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Analog Devices Inc. LT3467AES6#TRMPBF
- Part No.:
- LT3467AES6#TRMPBF
- Manufacturer:
- Analog Devices Inc.
- Package:
- SOT-23-6 Thin, TSOT-23-6
- Datasheet:
-
LT3467AES6#TRMPBF.pdf
- Description:
- IC REG BST FLYBACK ADJ TSOT23-6
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
LT3467AES6#TRMPBF from Analog Devices is a 2.1MHz, 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 low 330mV VCE(SAT) at 1.1A. It delivers 5V at 430mA from a 3.3V input or 15V at 135mA for TFT-LCD bias and portable power applications.
For engineers reviewing the LT3467AES6#TRMPBF datasheet, LT3467AES6#TRMPBF pinout, LT3467AES6#TRMPBF application, or LT3467AES6#TRMPBF equivalent, key selection criteria include switching frequency (2.1MHz), input voltage range (2.4V–16V), feedback reference (1.255V), soft-start programmability, and 42V switch rating for high-voltage boost and SEPIC topologies.
Technical Context
The LT3467AES6#TRMPBF implements a constant-frequency current-mode PWM architecture with an internal 2.1MHz oscillator, enabling stable regulation and predictable noise filtering. Its NPN bipolar switch features 330mV VCE(SAT) at 1.1A and 42V breakdown, supporting output voltages up to 40V in boost, SEPIC, and flyback configurations.
Soft-start is controlled via an external capacitor on the SS pin, charged by a precise 4µA internal current source to 1.255V; this limits inrush current and prevents switch overstress during high-voltage start-up. The error amplifier compares FB voltage against a 1.255V reference to regulate output via peak-current control.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Switching Frequency | 2.1MHz - enables use of sub-1µH inductors and compact 0402/0603 capacitors, reducing board area and height. |
| Input Voltage Range | 2.4V to 16V - supports single Li-ion (2.6–4.2V), 4-cell alkaline (4–6.5V), or fixed 3.3V/5V rails without external regulators. |
| Feedback Reference Voltage | 1.255V ±2% - sets output via R1/R2 divider; enables precise 5V, 12V, 15V, or 40V outputs with <±1% tolerance under load/temperature. |
| Max Switch Voltage Rating | 42V - allows reliable operation in 40V boost, SEPIC, and flyback designs with margin for transients and diode drop. |
| VCE(SAT) @ 1.1A | 330mV typical - minimizes conduction loss, enabling >85% efficiency at 430mA/5V from 3.3V and high thermal efficiency in TSOT-23. |
| Soft-Start Charging Current | 4µA - provides linear, controllable output voltage ramp; 47nF capacitor yields ~12ms start-up, preventing input rail collapse. |
| Shutdown Current | <1µA - ensures battery-powered systems retain charge during standby; compatible with always-on monitoring circuits. |
Pinout & Package
LT3467AES6#TRMPBF uses a 6-lead Plastic TSOT-23 package (1.0mm max height, 2.9mm × 1.6mm footprint) with exposed pad thermally connected to GND. Pin 1 (SW) is marked by a dot; pin numbering follows standard TSOT-23 orientation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| SW (Pin 1) | Switch collector node | Connects to inductor/diode; carries full switch current (up to 1.1A); requires minimal trace area to reduce EMI and parasitic inductance. |
| GND (Pin 2) | Power and signal ground | Primary return path for switch current and IC bias; must be tied directly to local ground plane for thermal and noise performance. |
| FB (Pin 3) | Feedback input | Monitors output via resistive divider; 1.255V reference sets regulation point; sensitive node-keep traces short and away from noisy signals. |
| VIN (Pin 6) | Input supply | Accepts 2.4–16V; requires local 1–4.7µF ceramic bypass capacitor placed adjacent to pin to suppress high-frequency ripple. |
| SS (Pin 5) | Soft-start control | Charged by 4µA current to 1.255V; capacitor value (10–200nF) determines output ramp time and inrush limiting behavior. |
| SHDN (Pin 4) | Enable/disable control | Logic-high (>2.4V) enables regulator; logic-low (<0.5V) disables with <1µA quiescent draw; supports system-level power sequencing. |
Key Features
| Feature | Design Value |
|---|---|
| 2.1MHz fixed-frequency operation | Enables use of 0.9–6.8µH inductors and 0402/0603 MLCCs, reducing solution size by >40% vs 1.3MHz LT3467 variants. |
| Integrated 42V, 1.1A NPN switch with 330mV VCE(SAT) | Eliminates external transistor and drive circuitry; achieves high current density in TSOT-23 while maintaining thermal safety margin. |
| Dedicated soft-start pin with 4µA precision current source | Provides repeatable, capacitor-programmable start-up timing; prevents input droop and switch overcurrent in battery-fed systems. |
| Current-mode PWM control with 1.255V reference | Delivers fast transient response and inherent cycle-by-cycle current limiting; simplifies compensation with single-pole dominant pole design. |
| Wide input range (2.4V–16V) and high output capability (≤40V) | Supports direct Li-ion, multi-cell alkaline, and industrial 5V/12V rails; enables single-chip solutions for 5V/12V/15V/40V outputs in portable and embedded systems. |
Applications
| Portable Medical Sensors | TFT-LCD Bias Supply |
|---|---|
Use Scenario: Powering optical heart-rate monitors and glucose meters from single Li-ion cells. IC Role / Device Role / Timing Role: Step-up converter generating stable 5V and ±9V/±15V rails for analog front-end and display drivers. Use Value: 2.1MHz operation minimizes inductor size and EMI, critical for compact wearable form factors and low-noise analog signal chains. |
Use Scenario: Providing 9V, 18V, and –9V bias for active-matrix LCD panels in handheld diagnostics and portable ultrasound. IC Role / Device Role / Timing Role: Primary boost controller in triple-output flyback/SEPIC configuration with soft-start sequencing. Use Value: Programmable soft-start prevents panel latch-up during power-on; 42V switch rating safely handles 18V+ outputs with margin. |
| Industrial IoT Edge Node | DSL/CPE Power Management |
Use Scenario: Generating local 12V/5V supplies from 3.3V system rails in wireless sensor gateways and PLC I/O modules. IC Role / Device Role / Timing Role: High-efficiency boost converter powering isolated RS-485 transceivers and ADC reference buffers. Use Value: 85%+ efficiency at 270mA/12V from 5V input reduces thermal load in sealed enclosures; TSOT-23 eases automated assembly. |
Use Scenario: Supplying 40V phantom power and 5V logic rails in xDSL modems and fiber ONTs operating from 5V or 12V wall adapters. IC Role / Device Role / Timing Role: Primary 40V boost stage feeding downstream DC-DC converters and line drivers. Use Value: 42V switch rating provides 2V margin for line transients; low shutdown current (<1µA) meets Energy Star standby 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 |
|---|---|---|---|
| LT3467ES6#TRMPBF | 1.3MHz switching frequency; identical pinout, package, and 42V/1.1A switch; lower frequency increases inductor size but improves light-load efficiency. | Better suited for cost-sensitive, non-space-constrained designs where EMI filtering is prioritized over miniaturization. | Select when board area is less critical than EMI compliance or when reusing existing 1.3MHz layout assets. |
| LT3467AEDDB#TRMPBF | Same 2.1MHz frequency and electrical specs, but in 8-lead 3mm×2mm DFN package with exposed thermal pad; higher thermal performance (θJA = 80°C/W vs 165°C/W). | Preferred for higher-output-power applications (e.g., >500mA at 12V) requiring improved thermal dissipation in industrial environments. | Choose when continuous output current exceeds 450mA or ambient temperature exceeds 70°C; requires PCB redesign for DFN footprint. |
Compared with LT3467ES6#TRMPBF, the LT3467AES6#TRMPBF offers 62% higher switching frequency for smaller passives, while LT3467AEDDB#TRMPBF trades TSOT-23 compactness for superior thermal handling-making LT3467AES6#TRMPBF optimal for space-constrained, moderate-power portable designs.
Availability
LT3467AES6#TRMPBF is available at Aetrix Electronics and suitable for portable medical sensors, TFT-LCD bias supplies, industrial IoT edge nodes, and DSL/CPE power management requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for LT3467AES6#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 with precision power, sensing, and conversion technologies.
The LT3467/LT3467A product line was designed specifically for compact, high-efficiency DC/DC conversion in battery-powered and space-constrained applications-emphasizing integration, thermal efficiency, and ease of use in boost, SEPIC, and flyback topologies.
FAQ
What is the maximum output voltage achievable with the LT3467AES6#TRMPBF?
The LT3467AES6#TRMPBF features a 42V-rated internal NPN switch, enabling regulated output voltages up to 40V in boost, SEPIC, or flyback configurations. This rating includes margin for diode forward voltage and transient spikes, making it suitable for 36V and 40V applications such as DSL line drivers and LCD bias supplies. Output voltage is set externally via the FB resistor divider.
Does the LT3467AES6#TRMPBF require an external soft-start capacitor?
Yes-the LT3467AES6#TRMPBF requires an external capacitor on the SS pin to control start-up inrush current. An internal 4µA current source charges this capacitor to 1.255V; typical values range from 10nF to 200nF. Omitting the capacitor results in uncontrolled current surge, risking input rail collapse or switch overstress-especially critical in Li-ion and multi-cell alkaline applications.
Can the LT3467AES6#TRMPBF be used in SEPIC topology?
Yes-the LT3467AES6#TRMPBF is explicitly validated for SEPIC operation in its datasheet, including application circuits delivering 5V at 450mA from four alkaline cells. Its 42V switch rating, current-mode control, and dedicated soft-start make it robust in SEPIC configurations where input can exceed output. Layout must minimize SW node loop area and ensure proper coupling between coupled inductors.
What is the recommended inductor value for a 3.3V-to-5V application using the LT3467AES6#TRMPBF?
For a 3.3V-to-5V boost application, the LT3467AES6#TRMPBF datasheet recommends inductors from 0.9µH to 6.8µH due to its 2.1MHz switching frequency. A 1.5µH or 2.2µH shielded ferrite inductor rated for ≥1.2A saturation current (e.g., FDK MIP3226D1R5M or Sumida CR43-1R5) is optimal-balancing size, efficiency, and transient response while avoiding saturation under peak switch current.
Is the LT3467AES6#TRMPBF pin-compatible with other members of the LT3467 family?
Yes-the LT3467AES6#TRMPBF shares identical pinout and footprint with LT3467ES6#TRMPBF, LT3467IS6#TRMPBF, and LT3467AIS6#TRMPBF in the TSOT-23 package. This allows direct substitution within the same temperature grade (E-grade, –40°C to 85°C) without PCB changes, though system-level validation is required due to the 2.1MHz vs 1.3MHz frequency difference affecting filter component values and EMI behavior.
LT3467AES6#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:
- 2.1MHz
- Synchronous Rectifier:
- No
- Operating Temperature:
- -40°C ~ 85°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- TSOT-23-6
LT3467AES6#TRMPBF FAQ
1.How can I place an order for LT3467AES6#TRMPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT3467AES6#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 LT3467AES6#TRMPBF reliable?
The price and inventory of LT3467AES6#TRMPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LT3467AES6#TRMPBF is usually 5 days.
3.What payment methods are accepted for LT3467AES6#TRMPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT3467AES6#TRMPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT3467AES6#TRMPBF?
LT3467AES6#TRMPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT3467AES6#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 LT3467AES6#TRMPBF?
For technical support, including LT3467AES6#TRMPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT3467AES6#TRMPBF requirements.
6.How does Aetrix verify that LT3467AES6#TRMPBF is sourced from the original manufacturer or authorized distributors?
All LT3467AES6#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 LT3467AES6#TRMPBF meets industry standards.
7.What is the process for return or replacement of LT3467AES6#TRMPBF?
All LT3467AES6#TRMPBF units undergo pre-shipment inspection (PSI). If there is an issue with LT3467AES6#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 LT3467AES6#TRMPBF part is unused and in its original packaging.
Return procedure for LT3467AES6#TRMPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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