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Analog Devices Inc. LT3467AIS6#TRMPBF
- Part No.:
- LT3467AIS6#TRMPBF
- Manufacturer:
- Analog Devices Inc.
- Package:
- SOT-23-6 Thin, TSOT-23-6
- Datasheet:
-
LT3467AIS6#TRMPBF.pdf
- Description:
- IC REG BST FLYBACK ADJ TSOT23-6
- Quantity:
- Payment:
- Shipping:
Inventory:1,515
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Product details
Overview
LT3467AIS6#TRMPBF from Analog Devices is a 2.1MHz, 42V, 1.1A monolithic step-up DC/DC converter with integrated soft-start and bipolar switch in TSOT-23-6 package. It delivers 5V at 430mA from 3.3V input or 15V at 135mA from 3.3V input, targeting space-constrained boost, SEPIC, and flyback power supplies in portable electronics.
For engineers reviewing the LT3467AIS6#TRMPBF datasheet, LT3467AIS6#TRMPBF pinout, LT3467AIS6#TRMPBF application, or LT3467AIS6#TRMPBF equivalent, key selection criteria include switching frequency (2.1MHz), maximum output voltage (40V), soft-start programmability, low shutdown current (<1µA), and compatibility with ceramic output capacitors for minimal footprint.
Technical Context
The LT3467AIS6#TRMPBF uses constant-frequency current-mode PWM control with a 2.1MHz oscillator, enabling ultra-small inductors (e.g., 0.9µH–6.8µH) and ceramic capacitors. Its internal 42V, 1.1A NPN switch features 330mV VCE(SAT) at full load, supporting high-efficiency boost conversion up to 40V output.
It integrates a dedicated soft-start pin (SS) with 4µA charging current to control output voltage ramp rate, eliminating inrush current and improving robustness during high-voltage start-up. The feedback reference is precisely trimmed to 1.255V, enabling accurate output regulation via external resistor divider.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Switching Frequency | 2.1MHz - enables use of sub-1µH inductors and compact 0402/0603 ceramic capacitors |
| Max Output Voltage | 40V - supports boost, SEPIC, and flyback topologies for LCD bias, xDSL, and industrial rails |
| Input Voltage Range | 2.4V to 16V - accommodates single Li-ion (2.6–4.2V), 4-cell alkaline (4–6.5V), or 5V system rails |
| Feedback Reference | 1.255V ±1.2% - sets precise output voltage via R1/R2 divider; enables 5V, 12V, 15V, or 40V outputs |
| Soft-Start Current | 4µA - charges external capacitor to control output voltage rise time and limit inrush current |
| Shutdown Current | <1µA - ensures battery longevity in always-on or low-power standby modes |
| Switch VCE(SAT) | 330mV at 1.1A - minimizes conduction loss and thermal stress in high-current boost stages |
Pinout & Package
LT3467AIS6#TRMPBF is housed in a 6-lead Plastic TSOT-23 package (1mm height, 3.0mm × 1.75mm footprint) with exposed pad thermally connected to GND. Pin 1 is marked by a bar; pin 2 is GND; pin 3 is FB; pin 4 is SHDN; pin 5 is SS; pin 6 is VIN. SW is on pin 1 - requires minimal trace area to reduce EMI.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| SW (Pin 1) | Switch collector node | Connects directly to inductor and Schottky diode anode; high dI/dt path requiring short, wide trace and local ground pour |
| GND (Pin 2) | Power and signal ground | Primary return path for switch current and feedback reference; must be tied to low-impedance PCB ground plane |
| FB (Pin 3) | Feedback input | Senses output voltage via resistive divider; sensitive node requiring minimal trace length and guard ring to avoid noise coupling |
| SHDN (Pin 4) | Enable/disable control | Logic-high (>2.4V) enables operation; grounded disables regulator and reduces supply current to <1µA |
| SS (Pin 5) | Soft-start timing input | Charged by internal 4µA current source; external capacitor (10–200nF) sets output voltage ramp time and limits inrush |
| VIN (Pin 6) | Main input supply | Accepts 2.4–16V; requires local 1–4.7µF ceramic bypass capacitor placed within 2mm of pin |
Key Features
| Feature | Design Value |
|---|---|
| 2.1MHz fixed-frequency operation | Enables <1µH inductors and eliminates audible noise; reduces solution size by >40% vs 1.3MHz LT3467 |
| Programmable soft-start | External capacitor controls output voltage slew rate, preventing input rail collapse and protecting downstream loads |
| 42V, 1.1A integrated bipolar switch | Eliminates external transistor and driver; 330mV VCE(SAT) sustains high efficiency even at 430mA 5V output |
| 1.255V precision feedback reference | ±1.2% tolerance over –40°C to +125°C enables stable 5V/12V/15V outputs without trimming |
| Low shutdown quiescent current | <1µA draw extends battery life in portable devices with intermittent power requirements |
Applications
| Digital Camera Power Supply | White LED Backlight Driver |
|---|---|
Use Scenario: Generating 15V bias for CCD sensor and 5V logic rail from single 3.3V supply in compact camera modules. IC Role / Device Role / Timing Role: Primary step-up controller managing dual regulated outputs with independent soft-start sequencing. Use Value: Delivers 135mA at 15V and 430mA at 5V simultaneously using one IC and minimal passives, reducing BOM count and board area. |
Use Scenario: Driving parallel white LEDs requiring 24–36V from 3.3V Li-ion battery in smartphone displays. IC Role / Device Role / Timing Role: Constant-current-capable boost converter with adjustable output voltage and fast transient response. Use Value: Supports 40V max output and 2.1MHz switching to minimize inductor size and EMI, critical for RF-sensitive mobile designs. |
| TFT-LCD Bias Supply | xDSL Line Card Power |
Use Scenario: Generating +9V, –9V, and +18V rails for TFT panel gate drivers and source drivers from 3.3V input. IC Role / Device Role / Timing Role: Core boost controller in triple-output SEPIC/flyback configuration with soft-start coordination. Use Value: Enables compact 3.3V-to-±9V/18V solution with <1ms startup and <1% output ripple using ceramic capacitors only. |
Use Scenario: Providing isolated 40V/20mA boost rail for line driver amplifiers in ADSL/VDSL modems powered from 5V system bus. IC Role / Device Role / Timing Role: High-voltage boost stage operating in discontinuous conduction mode with tight output regulation. Use Value: Achieves 40V output with 88% peak efficiency and meets EN55022 Class B EMI limits due to 2.1MHz fixed-frequency architecture. |
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 |
|---|---|---|---|
| LT3467IS6#TRMPBF | 1.3MHz switching frequency; same pinout, package, and 42V/1.1A switch but lower frequency limits minimum inductor size to ≥4.7µH | Better suited for cost-sensitive designs where EMI filtering is less constrained and larger inductors are acceptable | Select when 1.3MHz operation simplifies EMI compliance or when legacy layout reuse is required |
| LT3467AEDDB#TRMPBF | Same 2.1MHz operation 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) enables higher continuous output power in thermally dense layouts | Choose for >500mA sustained loads or ambient temperatures exceeding 85°C where TSOT-23 thermal limits apply |
Compared with LT3467IS6#TRMPBF, the LT3467AIS6#TRMPBF enables smaller magnetics and lower output ripple; compared with LT3467AEDDB#TRMPBF, it trades thermal headroom for minimal footprint-ideal for ultra-thin portable enclosures where board area is more constrained than temperature rise.
Availability
LT3467AIS6#TRMPBF is available at Aetrix Electronics and suitable for portable medical diagnostics, digital imaging systems, and industrial handheld terminals requiring stable component supply, automotive-grade reliability (–40°C to +125°C), and long-term production continuity.
Supply support for LT3467AIS6#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 healthcare markets.
The LT3467/LT3467A product line was designed specifically for compact, high-efficiency DC/DC boost conversion in battery-powered and space-constrained applications, emphasizing integration, thermal efficiency, and ease of layout.
FAQ
What is the maximum output voltage achievable with the LT3467AIS6#TRMPBF?
The LT3467AIS6#TRMPBF supports up to 40V output voltage in boost, SEPIC, or flyback configurations. This is enabled by its 42V-rated internal NPN switch and robust current-mode control architecture. Output voltage is set externally via the FB pin resistor divider, with stability maintained across the full 2.4V–16V input range and –40°C to +125°C operating temperature.
Can the LT3467AIS6#TRMPBF replace the LT3467IS6#TRMPBF without layout changes?
Yes, the LT3467AIS6#TRMPBF is pin-for-pin compatible with the LT3467IS6#TRMPBF in the TSOT-23-6 package. Both share identical pinout, package dimensions, and terminal functions. However, the LT3467AIS6#TRMPBF operates at 2.1MHz versus 1.3MHz, so inductor and capacitor values must be scaled downward (e.g., 0.9µH instead of 4.7µH) to maintain optimal performance and stability.
What soft-start capacitor value is recommended for the LT3467AIS6#TRMPBF?
A 47nF ceramic capacitor on the SS pin is commonly used for the LT3467AIS6#TRMPBF to achieve ~15ms output voltage ramp time. Values between 10nF and 200nF are supported; larger capacitors extend ramp time to limit inrush current further, while smaller values accelerate startup. The internal 4µA current source charges the capacitor to 1.255V, defining the soft-start duration.
Does the LT3467AIS6#TRMPBF require an external Schottky diode?
Yes, the LT3467AIS6#TRMPBF requires an external Schottky diode connected between the SW pin and output rail. Recommended devices include the ON Semiconductor MBRM120 (20V) or MBRM140 (40V), selected based on maximum output voltage. The diode conducts during switch-off periods and must handle peak forward current up to 1.1A with low VF to preserve efficiency.
Is the LT3467AIS6#TRMPBF qualified for automotive applications?
The LT3467AIS6#TRMPBF is rated for –40°C to +125°C junction temperature and is specified for industrial applications. While not AEC-Q100 qualified itself, the LT3467AIS6#WTRMPBF variant (with #W suffix) is the automotive-grade version. For automotive designs, the #W part must be used to meet qualification requirements; the standard LT3467AIS6#TRMPBF is intended for industrial and consumer portable equipment.
LT3467AIS6#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 ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- TSOT-23-6
LT3467AIS6#TRMPBF FAQ
1.How can I place an order for LT3467AIS6#TRMPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT3467AIS6#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 LT3467AIS6#TRMPBF reliable?
The price and inventory of LT3467AIS6#TRMPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LT3467AIS6#TRMPBF is usually 5 days.
3.What payment methods are accepted for LT3467AIS6#TRMPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT3467AIS6#TRMPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT3467AIS6#TRMPBF?
LT3467AIS6#TRMPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT3467AIS6#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 LT3467AIS6#TRMPBF?
For technical support, including LT3467AIS6#TRMPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT3467AIS6#TRMPBF requirements.
6.How does Aetrix verify that LT3467AIS6#TRMPBF is sourced from the original manufacturer or authorized distributors?
All LT3467AIS6#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 LT3467AIS6#TRMPBF meets industry standards.
7.What is the process for return or replacement of LT3467AIS6#TRMPBF?
All LT3467AIS6#TRMPBF units undergo pre-shipment inspection (PSI). If there is an issue with LT3467AIS6#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 LT3467AIS6#TRMPBF part is unused and in its original packaging.
Return procedure for LT3467AIS6#TRMPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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