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Analog Devices Inc. LT3461ES6#TRMPBF
- Part No.:
- LT3461ES6#TRMPBF
- Manufacturer:
- Analog Devices Inc.
- Package:
- SOT-23-6 Thin, TSOT-23-6
- Datasheet:
-
LT3461ES6#TRMPBF.pdf
- Description:
- IC REG BOOST ADJ 300MA TSOT23-6
- Quantity:
- Payment:
- Shipping:
Inventory:3,857
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Product details
Overview
LT3461ES6#TRMPBF from Analog Devices (formerly Linear Technology) is a fixed-frequency current-mode step-up DC/DC converter with integrated Schottky diode and 260mV VCE(SAT) NPN switch, operating at 1.3MHz switching frequency, supporting 2.5V–16V input and up to 38V output, used in compact bias supplies for CCDs and TFT-LCDs.
For engineers reviewing the LT3461ES6#TRMPBF datasheet, LT3461ES6#TRMPBF pinout, LT3461ES6#TRMPBF application, or LT3461ES6#TRMPBF equivalent, key selection criteria include its 1.3MHz switching frequency, 92% max duty cycle, 420mA typical switch current limit, integrated Schottky rectifier, and SOT-23-6 package footprint for space-constrained boost designs.
Technical Context
The LT3461ES6#TRMPBF employs constant-frequency current-mode control with an internal 1.255V feedback reference and ramp-compensated PWM comparator, enabling stable regulation under varying line and load conditions. Its block diagram shows direct sensing of switch current combined with error amplifier output to set peak inductor current per cycle.
It features soft-start via RC-filtered SHDN pin, low shutdown current (<1µA), and thermal protection via junction temperature monitoring up to 125°C. The integrated Schottky eliminates external diode placement while limiting reverse leakage to 4µA at 40V reverse bias.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Switching Frequency | 1.3MHz - enables use of ≤47µH inductors and ≤2.2µF ceramic output capacitors for minimal board area |
| Feedback Reference Voltage | 1.255V - sets output via resistor divider: VOUT = 1.255V × (1 + R1/R2) |
| Max Output Voltage | 38V - supports high-voltage bias rails for CCD imaging and LCD gate drivers |
| Switch VCE(SAT) | 260mV at 250mA - reduces conduction loss and improves efficiency at medium loads |
| Input Voltage Range | 2.5V to 16V - accommodates single Li-ion, multi-cell alkaline, or industrial 12V rail inputs |
| Shutdown Current | <1µA - preserves battery life in always-on backup or sensor nodes |
| Max Duty Cycle | 92% - allows high step-up ratios (e.g., 3.3V → 36V) without pulse-skipping instability |
Pinout & Package
LT3461ES6#TRMPBF is housed in a 6-lead TSOT-23 (ThinSOT™) package, 1mm profile, JEDEC MO-193 compliant, with exposed pad not connected internally.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| SW (Pin 1) | Switch Node | Connects to inductor; carries high di/dt switching current - requires short, wide trace to minimize EMI |
| GND (Pin 2) | Power Ground | Primary return path for switch current and IC ground - must tie directly to local ground plane |
| FB (Pin 3) | Feedback Input | Senses output voltage divider; 1.255V reference - sensitive node requiring minimal trace area and guard ring |
| SHDN (Pin 4) | Enable/Soft-Start Control | Active-high enable (≥1.5V); RC filter here controls startup slew rate and inrush limiting |
| VOUT (Pin 5) | Output Sense | Provides Kelvin connection point for feedback divider - place output capacitor close to this pin and GND |
| VIN (Pin 6) | Input Supply | Power input requiring local 1µF ceramic bypass - connects to input capacitor and inductor feed |
Key Features
| Feature | Design Value |
|---|---|
| Integrated Schottky Diode | Eliminates external diode, saves PCB area, and reduces BOM count - forward drop 800–1100mV at 250mA |
| Low VCE(SAT) Switch | 260mV at 250mA enables >70% efficiency at 12V out from 5V input (70mA load) |
| 1.3MHz Fixed Switching | Enables use of small 10–47µH shielded inductors and avoids AM radio band interference |
| Soft-Start via SHDN Pin | RC network on SHDN limits inrush current and prevents output overshoot during startup |
| Wide Input Range | 2.5V–16V operation supports direct connection to Li-ion, NiMH, or 12V industrial rails without pre-regulation |
Applications
| CCD Bias Supply | TFT-LCD Gate Driver |
|---|---|
Use Scenario: Generating 24V–36V bias for charge-coupled device (CCD) image sensors in portable diagnostic equipment. IC Role / Device Role / Timing Role: Step-up regulator providing regulated high-voltage analog bias with low noise and fast transient response. Use Value: Integrated Schottky and 1.3MHz operation allow compact, low-EMI layout meeting medical EMC requirements. | Use Scenario: Supplying ±15V gate drive voltages for active-matrix LCD panels in handheld displays. IC Role / Device Role / Timing Role: Primary positive boost stage in dual-rail charge-pump-assisted bias generator. Use Value: 92% max duty cycle enables 3.3V-to-15V conversion in single stage; low shutdown current extends battery runtime. |
| XDSL Line Power | Battery Backup System |
Use Scenario: Providing isolated 12V auxiliary power for DSL transceiver PHYs in residential gateways. IC Role / Device Role / Timing Role: Non-isolated boost converter delivering stable 12V/70mA from 5V system rail. Use Value: 1.3MHz switching minimizes inductor size while maintaining >75% efficiency across load range. | Use Scenario: Maintaining 5V standby rail during AC mains failure in smart meter or IoT gateway. IC Role / Device Role / Timing Role: Low-quiescent boost controller sustaining critical logic supply from depleted Li-ion cell. Use Value: <1µA shutdown current and 2.5V start-up enable >1-year hold-up time from single-cell battery. |
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 |
|---|---|---|---|
| LT3461AES6#TRMPBF | 3MHz switching frequency, 82% max duty cycle, lower max output current due to higher switching losses | Better suited for ultra-compact layouts where inductor/capacitor size is critical over peak efficiency | Select when board area is constrained and 3MHz operation meets EMI requirements |
| LT3460ES5#TRMPBF | Same 1.3MHz frequency but SC-70-5 package (5-pin, no SHDN), no soft-start, 36V max output | Lacks shutdown control and soft-start - requires external enable circuitry and careful inrush management | Select only if SHDN and soft-start are unnecessary and SC-70 footprint is preferred |
Compared with LT3461ES6#TRMPBF, the LT3461AES6#TRMPBF trades 10–15% efficiency for ~40% smaller magnetics, while the LT3460ES5#TRMPBF removes system-level control features to reduce package size - making LT3461ES6#TRMPBF optimal for designs needing balance of control, efficiency, and integration in SOT-23.
Availability
LT3461ES6#TRMPBF is available at Aetrix Electronics and suitable for CCD bias supplies, TFT-LCD gate drivers, XDSL power systems, and battery backup circuits requiring stable component supply with full production traceability.
Supply support for LT3461ES6#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 acquired Linear Technology in 2017 and maintains its precision analog and power management portfolio with rigorous qualification and long-term support.
The LT3461 series was designed specifically for space-constrained, medium-power boost applications requiring integrated Schottky rectification and predictable EMI behavior - targeting imaging, display, and telecom infrastructure.
FAQ
What is the maximum output voltage supported by the LT3461ES6#TRMPBF?
The LT3461ES6#TRMPBF supports up to 38V output voltage, enabled by its 40V-rated internal switch and integrated Schottky diode. This rating is confirmed in Absolute Maximum Ratings and validated in typical applications such as 5V-to-36V conversion. Operation beyond 38V risks exceeding safe operating area limits and is not recommended.
Does the LT3461ES6#TRMPBF require an external Schottky diode?
No, the LT3461ES6#TRMPBF integrates a Schottky diode rated for 250mA continuous forward current and 4µA reverse leakage at 40V. The datasheet explicitly states "integrated Schottky rectifier" in features and eliminates need for external diode - verified in all typical application schematics including Figure 4 and TA05a.
What is the feedback reference voltage of the LT3461ES6#TRMPBF?
The LT3461ES6#TRMPBF has a precise 1.255V feedback reference voltage, specified as 1.225V to 1.280V over temperature. This value is used to calculate output voltage via VOUT = 1.255V × (1 + R1/R2), and is confirmed in Electrical Characteristics Table and PIN FUNCTIONS section.
Can the LT3461ES6#TRMPBF operate from a 2.5V input?
Yes, the LT3461ES6#TRMPBF guarantees operation down to 2.5V input, as stated in Electrical Characteristics under "Minimum Operating Voltage". It delivers regulated output across full load range at 2.5V - demonstrated in 3.3V-to-5V and 3.3V-to-15V typical applications using minimum input conditions.
What package type is used for the LT3461ES6#TRMPBF?
The LT3461ES6#TRMPBF uses a 6-lead TSOT-23 (ThinSOT™) package, 1mm height, with pinout matching standard SOT-23-6 but thinner profile. This is documented in Package Description, PIN CONFIGURATION, and ORDER INFORMATION sections - distinct from SC-70 or DFN variants.
LT3461ES6#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
- Output Configuration:
- Positive
- Topology:
- Boost
- Output Type:
- Adjustable
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 2.5V
- Voltage - Input (Max):
- 16V
- Voltage - Output (Min/Fixed):
- 1.255V
- Voltage - Output (Max):
- 38V
- Current - Output:
- 300mA (Switch)
- Frequency - Switching:
- 1.3MHz
- Synchronous Rectifier:
- No
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- TSOT-23-6
LT3461ES6#TRMPBF FAQ
1.How can I place an order for LT3461ES6#TRMPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT3461ES6#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 LT3461ES6#TRMPBF reliable?
The price and inventory of LT3461ES6#TRMPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LT3461ES6#TRMPBF is usually 5 days.
3.What payment methods are accepted for LT3461ES6#TRMPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT3461ES6#TRMPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT3461ES6#TRMPBF?
LT3461ES6#TRMPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT3461ES6#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 LT3461ES6#TRMPBF?
For technical support, including LT3461ES6#TRMPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT3461ES6#TRMPBF requirements.
6.How does Aetrix verify that LT3461ES6#TRMPBF is sourced from the original manufacturer or authorized distributors?
All LT3461ES6#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 LT3461ES6#TRMPBF meets industry standards.
7.What is the process for return or replacement of LT3461ES6#TRMPBF?
All LT3461ES6#TRMPBF units undergo pre-shipment inspection (PSI). If there is an issue with LT3461ES6#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 LT3461ES6#TRMPBF part is unused and in its original packaging.
Return procedure for LT3461ES6#TRMPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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