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Analog Devices Inc. LT3462ES6#TRMPBF
- Part No.:
- LT3462ES6#TRMPBF
- Manufacturer:
- Analog Devices Inc.
- Package:
- SOT-23-6 Thin, TSOT-23-6
- Datasheet:
-
LT3462ES6#TRMPBF.pdf
- Description:
- IC REG CUK ADJ 250MA TSOT23-6
- Quantity:
- Payment:
- Shipping:
Inventory:3,393
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Product details
Overview
LT3462ES6#TRMPBF from Analog Devices is a fixed-frequency current-mode inverting DC/DC converter with integrated Schottky diode and 270mV VCE(SAT) switch, operating at 1.2MHz switching frequency, supporting 2.5V–16V input and generating up to –38V output, widely used in CCD bias and LCD bias supplies.
For engineers reviewing the LT3462ES6#TRMPBF datasheet, LT3462ES6#TRMPBF pinout, LT3462ES6#TRMPBF application, or LT3462ES6#TRMPBF equivalent, this page delivers verified specifications, TSOT-23-6 package details, dual-inductor inverting topology behavior, and real-world design constraints including 1mVP–P output ripple with ceramic capacitors and <10µA shutdown current.
Technical Context
The LT3462ES6#TRMPBF implements constant-frequency current-mode control with internal ramp compensation, enabling stable regulation across line and load variations. Its dual-inductor inverting topology inherently filters both input and output currents, reducing EMI and achieving sub-millivolt peak-to-peak ripple when paired with X7R/X5R ceramics.
It features a ground-referenced high-impedance FB pin (≤50nA bias current) and a dual-function SDREF pin that serves as both 1.265V reference output (180µA source capability) and shutdown control input-pulling SDREF low disables switching and reduces quiescent current to <10µA.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Switching Frequency | 1.2MHz - enables use of compact 10–47µH inductors and ≤10µF ceramic output capacitors without sacrificing regulation stability. |
| Input Voltage Range | 2.5V to 16V - supports single-cell Li+ (2.7–4.2V), 3.3V, 5V, and 12V rail inputs without external regulators. |
| Output Voltage Range | Up to –38V - determined by VIN–VOUT differential limit (40V switch rating), suitable for high-voltage bias generation. |
| VCE(SAT) @ 250mA | 270mV - minimizes conduction loss in the internal NPN switch, improving efficiency especially at medium loads (e.g., –5V@100mA). |
| SDREF Reference Voltage | 1.265V ±20mV - precision feedback reference enabling accurate output setting via external resistor divider (e.g., R1/R2 = VOUT/–1.265V). |
| Shutdown Current | <10µA - ensures ultra-low power consumption during system sleep modes, critical for battery-powered CCD/LCD modules. |
| FB Bias Current | ≤50nA - allows use of high-value feedback resistors (e.g., >1MΩ) without degrading output voltage accuracy or noise immunity. |
Pinout & Package
LT3462ES6#TRMPBF is housed in a 6-lead TSOT-23 (S6) package with 0.95mm pitch, 1.00mm max height, and exposed pad not present - thermal performance relies on PCB copper area under leads per θJA = 192°C/W.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN | Input Supply | Connects to 2.5–16V source; requires local 1µF ceramic bypass capacitor placed adjacent to pin. |
| D | Schottky Anode | Internal Schottky cathode connects to SW; D ties to negative terminal of flying capacitor and L2 in dual-inductor topology. |
| SDREF | Shutdown / Reference | Pull low to disable regulator; otherwise sources 1.265V @ up to 80µA for FB divider bias and soft-start timing. |
| SW | Switch Node | Drives external inductor L1 and flying capacitor; switches at 1.2MHz with 270mV saturation drop. |
| GND | Ground Return | Common return for internal circuitry, FB, and SDREF; must tie directly to low-impedance local ground plane. |
| FB | Feedback Input | High-impedance node sensing voltage divider tap; regulates VOUT to –1.265V × (R1/R2) when referenced to GND. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated Schottky Diode | Eliminates external rectifier, reduces BOM count and board area - forward drop ≤1.1V @ 250mA enables efficient negative voltage conversion. |
| Dual-Inductor Inverting Topology | Provides inherent input/output current filtering, achieving ≤1mVP–P output ripple with ceramic capacitors - avoids LC filter complexity of buck-boost alternatives. |
| Low VCE(SAT) Switch | 270mV @ 250mA - lowers conduction loss and improves full-load efficiency (e.g., 70% at –5V/100mA from 5V input). |
| Ground-Referenced FB Pin | ≤50nA bias current - permits high-resistance feedback networks without gain error, simplifying layout and reducing noise pickup. |
| 1.265V Precision Reference | ±20mV tolerance over temperature - enables accurate, stable output voltage setting independent of external reference ICs. |
Applications
| CCD Bias Supply | LCD Panel Bias |
|---|---|
|
Use Scenario: Generating –8V to –12V bias for charge-coupled device (CCD) image sensors in portable medical or industrial cameras. IC Role / Device Role / Timing Role: Inverting DC/DC converter providing regulated negative rail with low noise and fast transient response during pixel readout cycles. Use Value: 1.2MHz operation avoids interference with CCD sampling frequencies; 1mVP–P ripple prevents image noise artifacts in analog signal chain. |
Use Scenario: Supplying –5V to –15V gate drive voltages for active-matrix LCD panels in handheld instrumentation or automotive displays. IC Role / Device Role / Timing Role: Compact inverting converter delivering stable negative bias with minimal footprint in space-constrained front-bezel layouts. Use Value: TSOT-23-6 package (1mm height) fits behind thin LCD glass; integrated Schottky eliminates discrete diode placement and routing. |
| GaAs FET Bias | General Purpose Negative Supply |
|
Use Scenario: Providing –3V to –10V gate bias for GaAs pHEMT amplifiers in RF front-ends for wireless infrastructure or test equipment. IC Role / Device Role / Timing Role: Low-noise negative voltage source with fast turn-on/turn-off controlled via SDREF pin for amplifier enable sequencing. Use Value: SDREF's 180µA pull-up enables precise soft-start via external capacitor; <10µA shutdown current preserves battery life during standby. |
Use Scenario: Creating isolated negative rails for op-amp dual supplies, sensor excitation, or analog front-end level-shifting in industrial PLC modules. IC Role / Device Role / Timing Role: General-purpose inverting converter supporting wide input (2.5–16V) and high output voltage (up to –38V) with minimal external components. Use Value: Dual-inductor topology provides clean, low-EMI output without additional filtering; 40V switch rating allows flexible VIN/VOUT combinations. |
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 |
|---|---|---|---|
| LT3462AES6#TRMPBF | 2.7MHz switching frequency, 77% max duty cycle, DFN-8 package option - higher frequency allows smaller magnetics but reduced max duty cycle limits high-VOUT designs. | Better suited for space-constrained, low-output-current (≤30mA) applications where 2.7MHz enables 10µH inductors and 1µF ceramics. | Select LT3462AES6#TRMPBF only if board area is critical and output current ≤30mA; LT3462ES6#TRMPBF remains preferred for ≥100mA or –12V+ outputs. |
| LT1931ES5#TRMPBF | 1.2MHz operation, 1A switch current limit, no integrated Schottky - requires external diode but supports higher output current and wider VOUT range (–34V max). | Applicable where higher load current (>100mA) or tighter output voltage tolerance is required, accepting added component count and layout complexity. | Choose LT1931ES5#TRMPBF when output current exceeds 100mA or when external diode selection (e.g., low-QRR Schottky) is needed for specific EMI or thermal goals. |
Compared with LT3462ES6#TRMPBF, LT3462AES6#TRMPBF trades lower max duty cycle and no DFN-6 option for higher switching frequency, while LT1931ES5#TRMPBF sacrifices integration for higher current capability and external diode flexibility - neither is pin-compatible, requiring layout revision.
Availability
LT3462ES6#TRMPBF is available at Aetrix Electronics and suitable for CCD bias, LCD panel bias, GaAs FET bias, and general-purpose negative voltage supply applications requiring stable component supply, consistent parametric performance, and long-term industrial lifecycle support.
Supply support for LT3462ES6#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, automotive, communications, and healthcare markets since 1965.
The LT3462 series belongs to Analog Devices' monolithic inverting DC/DC converter product line, designed specifically for compact, low-noise negative voltage generation in imaging, display, and RF bias applications where integrated Schottky and fixed-frequency control simplify design.
FAQ
What is the maximum output voltage achievable with the LT3462ES6#TRMPBF?
The LT3462ES6#TRMPBF supports a maximum VIN–VOUT differential of 38V due to its 40V-rated internal switch. For example, with 12V input, it can generate –26V output; with 5V input, –33V is possible. Output voltage is set by the FB resistor divider ratio and limited by external component voltage ratings - the LT3462ES6#TRMPBF itself does not regulate beyond this differential constraint.
Does the LT3462ES6#TRMPBF require an external Schottky diode?
No, the LT3462ES6#TRMPBF integrates a Schottky diode with ≤1.1V forward drop at 250mA, eliminating the need for an external rectifier. This integration reduces bill-of-materials count, PCB area, and layout complexity - the D pin connects directly to the cathode of the internal diode, and the anode is tied internally to the SW node.
Can the LT3462ES6#TRMPBF be used in a charge pump configuration?
No - the LT3462ES6#TRMPBF is designed exclusively for dual-inductor or coupled-inductor inverting topologies. It lacks internal charge pump circuitry and cannot operate as a capacitor-based voltage inverter. Its block diagram, pin functions, and application circuits all assume inductor-based energy transfer; attempting charge pump use will result in failure or undefined behavior.
What is the purpose of the SDREF pin on the LT3462ES6#TRMPBF?
The SDREF pin on the LT3462ES6#TRMPBF serves two simultaneous roles: it acts as a shutdown control input (pulling it low disables switching) and as a 1.265V reference output (sourcing up to 80µA). During normal operation, it biases the FB resistor divider; during shutdown, its internal bias cancellation circuit maintains regulation integrity - the LT3462ES6#TRMPBF leverages this dual function to minimize external components.
Is the LT3462ES6#TRMPBF RoHS-compliant and lead-free?
Yes, the LT3462ES6#TRMPBF carries the #TRMPBF suffix indicating lead-free (Pb-free) finish and RoHS compliance per EU Directive 2011/65/EU. The part marking "LTBBV" and packaging documentation confirm adherence to Analog Devices' lead-free manufacturing standards, including matte tin plating and halogen-free mold compound.
LT3462ES6#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-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#TRMPBF FAQ
1.How can I place an order for LT3462ES6#TRMPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT3462ES6#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 LT3462ES6#TRMPBF reliable?
The price and inventory of LT3462ES6#TRMPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LT3462ES6#TRMPBF is usually 5 days.
3.What payment methods are accepted for LT3462ES6#TRMPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT3462ES6#TRMPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT3462ES6#TRMPBF?
LT3462ES6#TRMPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT3462ES6#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 LT3462ES6#TRMPBF?
For technical support, including LT3462ES6#TRMPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT3462ES6#TRMPBF requirements.
6.How does Aetrix verify that LT3462ES6#TRMPBF is sourced from the original manufacturer or authorized distributors?
All LT3462ES6#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 LT3462ES6#TRMPBF meets industry standards.
7.What is the process for return or replacement of LT3462ES6#TRMPBF?
All LT3462ES6#TRMPBF units undergo pre-shipment inspection (PSI). If there is an issue with LT3462ES6#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 LT3462ES6#TRMPBF part is unused and in its original packaging.
Return procedure for LT3462ES6#TRMPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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