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Analog Devices Inc. LT3462ES6#TRPBF
- Part No.:
- LT3462ES6#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Package:
- SOT-23-6 Thin, TSOT-23-6
- Datasheet:
-
LT3462ES6#TRPBF.pdf
- Description:
- IC REG CUK ADJ 250MA TSOT23-6
- Quantity:
- Payment:
- Shipping:
Inventory:1,783
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Product details
Overview
LT3462ES6#TRPBF from Analog Devices is a fixed-frequency current-mode inverting DC/DC converter in a 6-lead TSOT-23 package, featuring an integrated Schottky diode and 270mV VCE(SAT) switch. It operates at 1.2MHz, supports 2.5V–16V input, delivers up to –38V output, and achieves <1mVP-P ripple with ceramic capacitors in dual-inductor topology - used in CCD bias, LCD bias, and GaAs FET bias supplies.
For engineers reviewing the LT3462ES6#TRPBF datasheet, LT3462ES6#TRPBF pinout, LT3462ES6#TRPBF application, or LT3462ES6#TRPBF equivalent, key selection criteria include switching frequency (1.2MHz), integrated Schottky rectifier, 1.265V reference accuracy (±20mV), shutdown current (<10µA), and compatibility with dual-inductor inverting topologies for low-noise negative voltage generation.
Technical Context
The LT3462ES6#TRPBF implements constant-frequency current-mode control with internal ramp compensation, enabling stable regulation under varying line and load conditions. Its dual-inductor inverting topology filters both input and output currents, reducing conducted EMI and achieving ultra-low output ripple.
It integrates a 40V-rated NPN switch and Schottky diode, supporting VIN-to-VOUT differentials up to 38V. The SDREF pin provides dual functionality: a 1.265V reference (180µA source capability) and active-low shutdown control with proprietary bias cancellation during shutdown.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Switching Frequency | 1.2MHz - enables use of small, low-profile inductors and ceramic capacitors; reduces solution size vs. lower-frequency converters. |
| Input Voltage Range | 2.5V to 16V - supports single-cell Li+ (2.7–4.2V), 3.3V, 5V, and 12V rails without external regulators. |
| Output Voltage Range | Up to –38V - determined by VIN–VOUT differential limit; suitable for high-voltage bias applications like CCD and LCD panels. |
| VCE(SAT) @ 250mA | 270mV - minimizes conduction loss in the internal switch, improving efficiency especially at medium loads. |
| Reference Voltage | 1.265V ±20mV - sets feedback divider ratio; low drift ensures stable output regulation across temperature and load. |
| Shutdown Current | <10µA - enables ultra-low-power standby in battery-powered systems such as portable instrumentation. |
| Output Ripple | <1mVP-P - achievable with ceramic output capacitors; critical for noise-sensitive analog circuits (e.g., image sensors). |
Pinout & Package
LT3462ES6#TRPBF is housed in a 6-lead TSOT-23 (ThinSOT™) package, 1mm profile, with exposed pad not present (S6 variant). Pin 1 is marked with a bar; thermal performance relies on PCB copper area under pins 2 and 3 (GND).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN (Pin 6) | Input supply connection | Accepts 2.5V–16V; requires local 1µF ceramic bypass capacitor placed adjacent to pin for stable operation. |
| D (Pin 5) | Anode of integrated Schottky diode | Connects to flying capacitor and second inductor; reverse leakage <4µA at –40V ensures minimal quiescent loss. |
| SDREF (Pin 4) | Shutdown control + 1.265V reference | Pulled low to disable regulator; sources up to 80µA at 1.265V for FB divider bias; internal 180µA pull-up enables startup. |
| SW (Pin 1) | Switch node | Drives external inductor L1; rated for 40V max; peak current limited to 420mA to protect internal transistor. |
| GND (Pin 2 & 3) | Power and signal ground | Both pins must connect directly to low-impedance PCB ground plane; shared return path for switch, feedback, and reference. |
| FB (Pin 3) | Feedback input | High-impedance (≤50nA bias), ground-referenced; regulates VOUT = –1.265V × (R1/R2); insensitive to resistor value drift. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated Schottky rectifier | Eliminates external diode, reducing BOM count and board area while maintaining low forward drop (800–1100mV @ 250mA). |
| Dual-inductor inverting topology | Filters both input and output currents, lowering conducted EMI and enabling <1mVP-P output ripple with ceramic caps. |
| Low VCE(SAT) switch | 270mV at 250mA improves full-load efficiency over competing 400mV+ switches, especially in 5V→–5V/100mA applications. |
| Ground-referenced FB pin | Enables high-value feedback resistors (e.g., 267kΩ/68.1kΩ) without degrading regulation accuracy or increasing thermal noise. |
| Proprietary shutdown bias cancellation | Maintains <10µA shutdown current even when VOUT remains negative, avoiding unintended loading of SDREF via R1 during off-state. |
Applications
| CCD Bias Supply | LCD Panel Bias |
|---|---|
Use Scenario: Generating –8V to –12V from 3.3V or 5V for charge-coupled device pixel readout circuits in medical imaging or scientific cameras. IC Role / Device Role / Timing Role: Inverting DC/DC converter providing stable, low-noise negative rail with fast transient response and minimal EMI coupling into analog signal paths. Use Value: Ultra-low 1mVP-P ripple preserves image SNR; 1.2MHz switching avoids interference with pixel clock harmonics. | Use Scenario: Supplying –15V to –25V bias for TFT-LCD gate drivers in industrial HMIs or automotive displays. IC Role / Device Role / Timing Role: High-voltage inverting converter operating from 5V or 12V input, delivering regulated negative voltage with tight line/load regulation. Use Value: 38V VIN–VOUT differential headroom supports wide input range; integrated Schottky eliminates layout sensitivity of discrete diode placement. |
| GaAs FET Gate Bias | General Purpose Negative Rail |
Use Scenario: Providing –5V to –12V gate bias for GaAs pHEMT amplifiers in RF front-ends for wireless infrastructure or test equipment. IC Role / Device Role / Timing Role: Low-noise, fast-starting inverter powering amplifier bias networks where supply rejection and stability are critical. Use Value: 1.265V reference accuracy (±20mV) ensures precise gate voltage setting; shutdown pin allows remote enable/disable synchronized with RF stage sequencing. | Use Scenario: Creating isolated –5V or –12V rails for op-amp dual supplies, ADC reference buffers, or analog sensor interfaces in embedded controllers. IC Role / Device Role / Timing Role: Compact, self-contained inverting converter replacing charge pumps or transformer-based solutions in space-constrained designs. Use Value: TSOT-23 footprint (2.9mm × 1.6mm) saves >50% board area vs. DFN alternatives; no external diode reduces component count and assembly cost. |
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 |
|---|---|---|---|
| LT1931ES5#TRPBF | 1.2MHz switching, 1A switch current limit, higher quiescent current (5.8mA), no integrated Schottky. | Supports higher output current (up to –34V @ 100mA), but requires external diode and larger inductor. | Choose when >100mA output current or higher VOUT magnitude is required; accept added BOM and layout complexity. |
| LT3464ES5#TRPBF | 85mA switch limit, 2.3V–10V input, integrated PNP disconnect, 25µA quiescent current. | Optimized for ultra-low-IQ and low-input-voltage operation (e.g., single Li+ cell), not high-VOUT or high-current. | Prefer for battery-powered devices needing sub-30µA operating current and ≤–12V output; unsuitable for –36V or 100mA loads. |
Compared with LT1931ES5#TRPBF and LT3464ES5#TRPBF, the LT3462ES6#TRPBF uniquely balances integrated Schottky rectification, 1.2MHz speed, and –38V capability in a 6-pin TSOT-23 - making it optimal for compact, medium-current negative bias supplies where BOM simplicity and low noise are prioritized over ultra-low IQ or extreme current rating.
Availability
LT3462ES6#TRPBF is available at Aetrix Electronics and suitable for CCD bias, LCD panel bias, GaAs FET gate bias, and general-purpose negative voltage supply applications requiring stable component supply, long-term lifecycle support, and consistent parametric performance across production batches.
Supply support for LT3462ES6#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, communications, automotive, and healthcare markets.
The LT3462 product line was designed specifically for compact, low-noise inverting DC/DC conversion in space-constrained analog systems - emphasizing integrated power components, high-frequency operation, and precision reference stability.
FAQ
What is the maximum allowable input-to-output voltage differential for LT3462ES6#TRPBF?
The LT3462ES6#TRPBF supports a maximum VIN–VOUT differential of 38V in dual-inductor inverting topology. For example, with VIN = 5V, the most negative VOUT achievable is –33V; with VIN = 12V, VOUT can reach –26V. This limit arises from the 40V-rated internal switch and must be respected to avoid overstress.
Does LT3462ES6#TRPBF require an external Schottky diode?
No, the LT3462ES6#TRPBF integrates a Schottky diode with 800–1100mV forward drop at 250mA and <4µA leakage at –40V. This eliminates the need for an external diode, simplifying layout and reducing bill-of-materials cost - a key differentiator versus non-integrated inverting controllers.
Can LT3462ES6#TRPBF operate from a 2.5V input supply?
Yes, the LT3462ES6#TRPBF has a minimum operating voltage of 2.5V and functions reliably down to this level. At 2.5V input, it can generate outputs such as –5V or –8V with appropriate feedback resistor selection and component sizing, though efficiency decreases slightly compared to 3.3V or 5V operation.
What is the purpose of the SDREF pin on LT3462ES6#TRPBF?
The SDREF pin on LT3462ES6#TRPBF serves two simultaneous roles: (1) active-low shutdown control - pulling it to GND disables the converter and reduces supply current to <10µA; and (2) 1.265V reference output - sourcing up to 80µA to bias the feedback resistor divider, ensuring accurate output regulation without external references.
How does LT3462ES6#TRPBF achieve ultra-low output voltage ripple?
The LT3462ES6#TRPBF achieves <1mVP-P output ripple through its dual-inductor inverting topology - which inherently filters both input and output currents - combined with ceramic output capacitors and 1.2MHz fixed-frequency operation. This eliminates low-frequency noise typical of charge-pump solutions and avoids the EMI peaks associated with variable-frequency architectures.
LT3462ES6#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:
- 1.2MHz
- Synchronous Rectifier:
- No
- Operating Temperature:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- TSOT-23-6
LT3462ES6#TRPBF FAQ
1.How can I place an order for LT3462ES6#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT3462ES6#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 LT3462ES6#TRPBF reliable?
The price and inventory of LT3462ES6#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LT3462ES6#TRPBF is usually 5 days.
3.What payment methods are accepted for LT3462ES6#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT3462ES6#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT3462ES6#TRPBF?
LT3462ES6#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT3462ES6#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 LT3462ES6#TRPBF?
For technical support, including LT3462ES6#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT3462ES6#TRPBF requirements.
6.How does Aetrix verify that LT3462ES6#TRPBF is sourced from the original manufacturer or authorized distributors?
All LT3462ES6#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 LT3462ES6#TRPBF meets industry standards.
7.What is the process for return or replacement of LT3462ES6#TRPBF?
All LT3462ES6#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LT3462ES6#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 LT3462ES6#TRPBF part is unused and in its original packaging.
Return procedure for LT3462ES6#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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