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Analog Devices Inc. LT3462AES6#TRPBF
- Part No.:
- LT3462AES6#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Package:
- SOT-23-6 Thin, TSOT-23-6
- Datasheet:
-
LT3462AES6#TRPBF.pdf
- Description:
- IC REG CUK ADJ 250MA TSOT23-6
- Quantity:
- Payment:
- Shipping:
Inventory:4,348
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Product details
Overview
LT3462AES6#TRPBF from Analog Devices is a fixed-frequency current-mode inverting DC/DC converter with integrated Schottky diode and 270mV VCE(SAT) switch, operating at 2.7MHz switching frequency, supporting 2.5V to 16V input and delivering up to –38V output in dual-inductor topology, used for LCD bias and GaAs FET bias applications.
For engineers reviewing the LT3462AES6#TRPBF datasheet, LT3462AES6#TRPBF pinout, LT3462AES6#TRPBF application, or LT3462AES6#TRPBF equivalent, key selection criteria include switching frequency (2.7MHz), integrated Schottky rectifier, 1.265V reference accuracy, low-noise 1mVP-P output ripple with ceramic capacitors, and SOT-23-6 package compatibility.
Technical Context
The LT3462AES6#TRPBF implements constant-frequency current-mode control with internal ramp compensation, enabling stable regulation under wide line/load variations. Its dual-inductor inverting topology filters both input and output currents, achieving very low output voltage ripple near 1mVP-P when paired with ceramic capacitors.
It features a ground-referenced high-impedance FB pin (bias current ≤50nA) and a dual-function SDREF pin that serves as both shutdown control input and 1.265V reference output (±20mV tolerance, 180µA source capability), enabling precise feedback divider biasing without external references.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Switching Frequency | 2.7MHz typical - enables use of sub-2mm height inductors and 1µF ceramic flying/output caps |
| Input Voltage Range | 2.5V to 16V - supports single-cell Li+ (2.7–4.2V), 3.3V, and 5V rails |
| Output Voltage Range | Up to –38V - determined by VIN–VOUT differential limit of 40V switch rating |
| SDREF Reference Voltage | 1.265V ±20mV - sets feedback divider ratio for accurate negative output regulation |
| VCE(SAT) @ 250mA | 270mV max - minimizes conduction loss in high-current inverting topologies |
| Quiescent Current | 6.5µA max in shutdown - ensures ultra-low standby power for battery-powered systems |
| FB Bias Current | ≤50nA - allows use of >1MΩ feedback resistors without accuracy degradation |
Pinout & Package
LT3462AES6#TRPBF is housed in a 6-lead TSOT-23 (S6) package with 1mm profile, JEDEC MO-193 compliant, requiring exposed-pad grounding only for DFN variants (not applicable here).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN | Input supply connection | Accepts 2.5V–16V; requires local 1µF ceramic bypass capacitor |
| D | Anode of integrated Schottky diode | Connects to flying capacitor negative terminal and L2; supports ≤–40V reverse bias |
| SDREF | Shutdown control + 1.265V reference output | Pull to GND to disable; sources up to 180µA at 1.265V for R2 biasing |
| SW | Collector of internal NPN switch | Drives external inductor L1; rated for 40V max, 420mA current limit |
| GND | Power and signal ground reference | Must tie directly to local PCB ground plane; no separate analog/digital split required |
| FB | Feedback error amplifier input | Ground-referenced; regulates VOUT via R1/R2 divider where VOUT = –1.265V × (R1/R2) |
Key Features
| Feature | Design Value |
|---|---|
| Integrated Schottky rectifier | Eliminates external diode, reduces BOM count and board area in inverting converters |
| 2.7MHz fixed switching frequency | Enables <1mm-height magnetics and compact 1µF ceramic capacitors for space-constrained designs |
| 1mVP-P output ripple (ceramic caps) | Meets noise-sensitive analog supply requirements for CCD, LCD, and RF bias rails |
| Low VCE(SAT) (270mV @ 250mA) | Improves efficiency at medium loads vs. discrete switch + diode solutions |
| 1.265V reference with 180µA drive | Supports high-resistor feedback networks without external buffer, preserving accuracy |
Applications
| LCD Bias Supply | CCD Bias Supply |
|---|---|
Use Scenario: Generating –10V to –15V bias for TFT-LCD gate drivers in portable displays. IC Role / Device Role / Timing Role: Inverting DC/DC converter providing regulated negative rail from 3.3V or 5V main supply. Use Value: Achieves <1mVP-P ripple with ceramic caps, preventing display flicker and ghosting artifacts. | Use Scenario: Supplying –12V to –24V bias for charge-coupled device image sensors in medical/endoscopy cameras. IC Role / Device Role / Timing Role: High-stability inverting regulator delivering low-noise negative voltage with fast transient response. Use Value: 2.7MHz operation avoids interference with pixel clock harmonics; integrated Schottky eliminates diode mismatch drift. |
| GaAs FET Bias | General Purpose Negative Supply |
Use Scenario: Providing –5V to –8V gate bias for GaAs pHEMT amplifiers in 5G front-end modules. IC Role / Device Role / Timing Role: Compact inverting converter with tight output regulation and low EMI. Use Value: Low VCE(SAT) and 2.7MHz switching minimize thermal rise and enable small 0603/0805 passives. | Use Scenario: Creating isolated –5V or –12V rails for op-amp dual supplies, sensor interfaces, or RS-232 transceivers. IC Role / Device Role / Timing Role: General-purpose inverting DC/DC converter replacing charge pumps in cost-sensitive industrial controls. Use Value: Fixed-frequency operation avoids low-frequency noise; integrated components reduce total solution size by >40% vs. discrete alternatives. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar inverting DC/DC converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LT3462ES6#TRPBF | 1.2MHz switching frequency, higher duty cycle (90%), same SOT-23-6 package | Better efficiency at light loads; larger inductors/caps required vs. LT3462AES6#TRPBF | Select when lower EMI or higher peak current capability (420mA) is prioritized over size |
| LT1931AEDD#TRPBF | 2.2MHz switching, 1A switch current limit, 8-lead DFN (3mm × 2mm), no integrated Schottky | Requires external Schottky; supports higher output current but larger footprint | Choose when >100mA output current or wider input range (2.6V–16V) is needed |
Compared with LT3462ES6#TRPBF, LT3462AES6#TRPBF delivers smaller passive components and lower output ripple due to its 2.7MHz frequency, while LT1931AEDD#TRPBF trades integration for higher current capability and different package constraints-neither is pin-compatible, requiring layout revision.
Availability
LT3462AES6#TRPBF is available at Aetrix Electronics and suitable for LCD bias, CCD bias, and GaAs FET bias applications requiring stable component supply, consistent parametric performance, and long-term industrial availability.
Supply support for LT3462AES6#TRPBF 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, automotive, communications, and healthcare markets.
The LT3462/LT3462A product line delivers compact, high-frequency inverting DC/DC converters optimized for space-constrained negative voltage generation in imaging, display, and RF subsystems.
FAQ
What is the maximum output voltage achievable with the LT3462AES6#TRPBF?
The LT3462AES6#TRPBF supports up to –38V output voltage, limited by its 40V-rated internal switch and the VIN–VOUT differential constraint. For example, with 3.3V input, –36.7V is attainable; with 5V input, –35V is practical. Output voltage is set by the feedback resistor divider ratio referenced to the 1.265V SDREF pin.
Does the LT3462AES6#TRPBF require an external Schottky diode?
No, the LT3462AES6#TRPBF integrates a Schottky diode at the D pin, eliminating the need for an external diode. This reduces bill-of-materials count, PCB area, and potential reliability issues from diode mismatch or thermal drift-confirmed in the device's "Integrated Schottky Rectifier" feature list and pin function description.
What is the purpose of the SDREF pin on the LT3462AES6#TRPBF?
The SDREF pin on the LT3462AES6#TRPBF serves two functions: it acts as a shutdown control input (pull to GND disables the converter) and provides a 1.265V reference output capable of sourcing up to 180µA. This dual role enables direct biasing of the feedback resistor network without external references, improving accuracy and simplifying design.
Can the LT3462AES6#TRPBF operate from a 2.5V input supply?
Yes, the LT3462AES6#TRPBF specifies a minimum operating voltage of 2.5V, making it compatible with single-cell Li+ batteries (2.7–4.2V nominal) and low-voltage logic rails. At 2.5V input, it can generate regulated negative outputs such as –5V or –8V, though output current capability decreases proportionally with input voltage per the efficiency curves in the datasheet.
What package type does the LT3462AES6#TRPBF use?
The LT3462AES6#TRPBF uses a 6-lead TSOT-23 (S6) package, measuring 2.9mm × 1.6mm × 1.0mm with a 0.95mm pitch. It is JEDEC MO-193 compliant, lead-free, and RoHS-compliant. Unlike the LT3462AEDC variant, this part does not use the 8-lead DFN package.
LT3462AES6#TRPBF 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-Down
- Output Configuration:
- Negative
- Topology:
- Cuk
- Output Type:
- Adjustable
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 2.5V
- Voltage - Input (Max):
- 16V
- Voltage - Output (Min/Fixed):
- -1.265V
- Voltage - Output (Max):
- -38V
- Current - Output:
- 250mA
- Frequency - Switching:
- 2.7MHz
- Synchronous Rectifier:
- No
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- TSOT-23-6
LT3462AES6#TRPBF FAQ
1.How can I place an order for LT3462AES6#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT3462AES6#TRPBF 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 LT3462AES6#TRPBF reliable?
The price and inventory of LT3462AES6#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LT3462AES6#TRPBF is usually 5 days.
3.What payment methods are accepted for LT3462AES6#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT3462AES6#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT3462AES6#TRPBF?
LT3462AES6#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT3462AES6#TRPBF 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 LT3462AES6#TRPBF?
For technical support, including LT3462AES6#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT3462AES6#TRPBF requirements.
6.How does Aetrix verify that LT3462AES6#TRPBF is sourced from the original manufacturer or authorized distributors?
All LT3462AES6#TRPBF 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 LT3462AES6#TRPBF meets industry standards.
7.What is the process for return or replacement of LT3462AES6#TRPBF?
All LT3462AES6#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LT3462AES6#TRPBF, 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 LT3462AES6#TRPBF part is unused and in its original packaging.
Return procedure for LT3462AES6#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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