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Analog Devices Inc. LT3463EDD#TRPBF
- Part No.:
- LT3463EDD#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Package:
- 10-WFDFN Exposed Pad
- Datasheet:
-
LT3463EDD#TRPBF.pdf
- Description:
- IC REG BST CHG PUMP ADJ DL 10DFN
- Quantity:
- Payment:
- Shipping:
Inventory:5,275
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Product details
Overview
LT3463EDD#TRPBF from Analog Devices (formerly Linear Technology) is a dual micropower DC/DC converter IC with integrated Schottky diodes, designed for generating well-regulated positive and negative bias supplies in space-constrained portable systems. It delivers 250mA current limit per channel, operates from 2.4V to 15V input, achieves ±40V output capability, and draws only 20µA quiescent current per converter - enabling high-efficiency CCD and LCD bias generation in digital cameras and handheld computers.
For engineers reviewing the LT3463EDD#TRPBF datasheet, LT3463EDD#TRPBF pinout, LT3463EDD#TRPBF application, or LT3463EDD#TRPBF equivalent, key selection criteria include its dual-channel constant off-time control architecture, internal 42V NPN switches with 180mV VCE(SAT), 300ns minimum off-time for compact magnetics, and DFN-10 (3mm × 3mm) package with exposed thermal pad.
Technical Context
The LT3463EDD#TRPBF integrates two independent switching regulators: a boost converter (Switcher 1) for positive output and an inverting converter (Switcher 2) for negative output, both using constant off-time control with internal 42V NPN power switches and Schottky diodes. Each channel features separate shutdown pins (SHDN1/SHDN2), dedicated feedback inputs (FB1/FB2), and a shared 1.25V reference (VREF) used with FB2 to set the negative rail.
Its operation relies on hysteresis-based regulation: FB1 comparator trips at 1.25V ±2.5mV with 8mV hysteresis, while FB2 senses near-ground voltage for inverting regulation with trip threshold of 0–12mV and identical hysteresis. Switch current limiting is fixed at 250mA for both channels (LT3463 variant), and minimum off-time is tightly controlled at 300ns across temperature.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 2.4V to 15V - supports single-cell Li-ion, multi-cell alkaline, and regulated 3.3V/5V rails without external LDO pre-regulation. |
| Output Voltage Range | Up to +40V and –40V - enables direct generation of high-voltage CCD and LCD bias rails without transformers or external diodes. |
| Per-Channel Quiescent Current | 20µA active / <1µA shutdown - preserves battery life in always-on portable imaging and display subsystems. |
| Switch Current Limit | 250mA per channel - defines maximum sustainable load for both positive and negative outputs under LT3463 specification. |
| Minimum Switch Off-Time | 300ns - allows use of small inductors (e.g., 4.7µH–10µH) and low-profile ceramic capacitors to minimize PCB area. |
| Internal Power Switch Rating | 42V VCEO, 180mV VCE(SAT) at 150mA - ensures low conduction loss and safe operation up to ±40V output configurations. |
| Reference Voltage Accuracy | 1.23V to 1.27V (G-grade) - provides ±2% tolerance on programmed output voltages when using standard 1% feedback resistors. |
Pinout & Package
LT3463EDD#TRPBF is housed in a 10-lead 3mm × 3mm plastic DFN package with exposed thermal pad (Pin 11 = GND), requiring soldering to PCB ground plane for thermal and electrical integrity.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| FB1 (Pin 10) | Feedback input for positive output regulator | Senses divided VOUT1 voltage; comparator triggers switch turn-on when below 1.25V, enabling hysteresis-based regulation. |
| SHDN1 (Pin 9) | Enable/disable control for positive output regulator | Pull ≥1.5V to enable Switcher 1; pull ≤0.3V to enter ultra-low-IQ shutdown mode (<1µA total). |
| SHDN2 (Pin 8) | Enable/disable control for negative output regulator | Independent control of Switcher 2; allows asymmetric power sequencing or dynamic rail disabling. |
| VREF (Pin 7) | 1.25V precision reference output | Used with FB2 to set negative output voltage via resistor divider; stable over temperature and line variations. |
| FB2 (Pin 6) | Feedback input for negative output regulator | Senses voltage between VREF and VOUT2; trip point near 0V enables accurate inverting regulation down to –40V. |
| VOUT1 (Pin 1) | Positive output cathode node | Internally connected to cathode of Schottky diode D1; requires external output capacitor and inductor for boost topology. |
| SW1 (Pin 2) | Collector of internal NPN switch for positive regulator | High dv/dt node - must be routed with minimal trace area and adjacent ground plane to suppress EMI. |
| VIN (Pin 3) | Main input supply connection | Requires local 1µF ceramic bypass capacitor placed as close as possible to reduce input ripple and improve transient response. |
| SW2 (Pin 4) | Collector of internal NPN switch for negative regulator | Carries inverted switching waveform; same layout constraints as SW1 for EMI control and efficiency optimization. |
| D2 (Pin 5) | Anode of internal Schottky diode for negative regulator | Connected internally to GND; forms return path for inverting converter current - no external diode needed. |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent regulators | Separate SHDN and FB pins allow independent enable/disable and programmable output voltages for +V and –V rails. |
| Integrated 42V Schottky diodes | Eliminates need for external diodes in both boost and inverting topologies - reduces BOM count and board area. |
| 300ns minimum off-time | Enables use of sub-10µH inductors and 0.22µF–4.7µF ceramic capacitors - critical for ultra-compact portable designs. |
| Exposed thermal pad (Pin 11) | Provides low-thermal-resistance path to PCB ground plane - maintains junction temperature ≤125°C at full load in 2-layer boards. |
| Current-limited fixed off-time control | Delivers >75% efficiency across 0.1–50mA load range (e.g., 15V@10mA, –8V@50mA) without external compensation. |
Applications
| CCD Bias Supply | LCD Bias Generation |
|---|---|
|
Use Scenario: Providing +15V and –8V bias rails for charge-coupled device image sensors in digital cameras and industrial inspection systems. IC Role / Device Role / Timing Role: Dual-output DC/DC converter generating isolated, low-noise analog supply rails directly from 2.7V–5V system bus. Use Value: Eliminates discrete transformer-based solutions; achieves 75–80% efficiency at 10–50mA loads while occupying <15mm² PCB area. |
Use Scenario: Generating ±20V high-voltage bias for TFT-LCD source driver ICs in handheld computers and medical displays. IC Role / Device Role / Timing Role: Compact dual-switcher delivering stable, independently controllable positive and negative rails for display panel driving. Use Value: Supports fast startup and rail sequencing via separate SHDN1/SHDN2; enables compact 3mm × 3mm solution versus discrete boost + inverter combinations. |
| Handheld Computer Power | Digital Camera Core Bias |
|
Use Scenario: Supplying auxiliary ±12V rails for analog front-end circuitry and sensor interfaces in ruggedized PDAs and portable test equipment. IC Role / Device Role / Timing Role: Micropower dual converter operating from main 3.3V or 5V rail, with shutdown modes for system-level power gating. Use Value: 20µA per-channel quiescent current extends battery runtime during standby; 42V switch rating avoids derating concerns at ±20V outputs. |
Use Scenario: Delivering precisely regulated +15V and –8V to CCD analog signal chain (preamp, CDS, ADC bias) in DSLR and mirrorless camera modules. IC Role / Device Role / Timing Role: Low-noise, low-EMI dual converter with tight VREF accuracy (±2%) ensuring consistent pixel response and reduced fixed-pattern noise. Use Value: Internal Schottky diodes and 300ns off-time minimize switching artifacts coupled into sensitive analog imaging paths. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-output micropower DC/DC converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LT3463AEDD#TRPBF | Same package and pinout; negative channel current limit increased to 400mA (vs. 250mA in LT3463EDD#TRPBF). | Better suited for higher-current negative rails (e.g., –12V @ 40mA) where LT3463EDD#TRPBF may enter current-limit foldback. | Select LT3463AEDD#TRPBF when negative output load exceeds 250mA; otherwise LT3463EDD#TRPBF offers identical functionality at lower cost. |
| LT1945EMS#TRPBF | MSOP-10 package; 350mA switch current limit per channel; wider 1.2V–15V input range; same 42V switch rating. | Supports lower VIN (1.2V) for single-cell NiMH or LiFePO₄; higher current capability suits larger LCD panels or multi-sensor systems. | Choose LT1945EMS#TRPBF for sub-2.4V input compatibility or >250mA negative load; LT3463EDD#TRPBF preferred for strict 3mm × 3mm footprint constraints. |
Compared with LT3463AEDD#TRPBF and LT1945EMS#TRPBF, the LT3463EDD#TRPBF provides optimal balance of ultra-small DFN footprint, 250mA dual-channel capability, and 2.4V minimum input - making it the most space-efficient choice for CCD/LCD bias in volume portable designs where negative rail current stays ≤250mA.
Availability
LT3463EDD#TRPBF is available at Aetrix Electronics and suitable for CCD bias supply, LCD bias generation, and handheld computer power management requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for LT3463EDD#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. (acquired Linear Technology in 2017) is a global leader in high-performance analog, mixed-signal, and power management semiconductors, serving industrial, automotive, communications, and healthcare markets.
The LT3463EDD#TRPBF belongs to Linear's micropower DC/DC converter product line, engineered specifically for compact, battery-powered imaging and display systems requiring dual-rail high-voltage bias with minimal quiescent current and zero external diodes.
FAQ
What is the maximum output voltage achievable with the LT3463EDD#TRPBF?
The LT3463EDD#TRPBF supports up to +40V on the positive output (VOUT1) and –40V on the negative output (VOUT2), enabled by its internal 42V-rated NPN switches and Schottky diodes. This capability eliminates need for external high-voltage components in CCD and LCD bias applications, though practical limits depend on inductor saturation current and capacitor voltage ratings selected in the design.
Does the LT3463EDD#TRPBF require external Schottky diodes?
No, the LT3463EDD#TRPBF integrates all necessary Schottky diodes: one cathode-connected to VOUT1 (Pin 1) for the boost regulator, and one anode-connected to D2 (Pin 5) for the inverting regulator. This integration reduces bill-of-materials count, PCB area, and potential failure points compared to discrete solutions requiring two external diodes.
How does the LT3463EDD#TRPBF achieve low quiescent current?
The LT3463EDD#TRPBF achieves 20µA per-converter quiescent current through a combination of optimized internal biasing, current-limited fixed off-time control, and deep shutdown mode (<1µA total). Its architecture disables non-essential circuitry when FB1 or FB2 thresholds are met, minimizing static current draw while maintaining fast wake-up response for portable applications.
Can the positive and negative outputs of the LT3463EDD#TRPBF be enabled independently?
Yes, the LT3463EDD#TRPBF provides independent enable control via SHDN1 (Pin 9) for the positive output and SHDN2 (Pin 8) for the negative output. Each pin accepts logic-level signals: ≥1.5V enables the respective converter, ≤0.3V disables it. This allows flexible power sequencing, dynamic rail disabling, and system-level power management without affecting the other channel.
What package type and thermal considerations apply to the LT3463EDD#TRPBF?
The LT3463EDD#TRPBF uses a 10-lead 3mm × 3mm plastic DFN package with an exposed thermal pad (Pin 11 = GND). This pad must be soldered to a PCB ground plane to ensure proper thermal dissipation and electrical performance. Thermal resistance is θJA = 43°C/W and θJC = 3°C/W, allowing reliable operation up to 125°C junction temperature with appropriate copper area and airflow.
LT3463EDD#TRPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 10-WFDFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Function:
- Step-Up
- Output Configuration:
- Positive and Negative (Dual Rail)
- Topology:
- Boost, Charge Pump
- Output Type:
- Adjustable
- Number of Outputs:
- 2
- Voltage - Input (Min):
- 2.4V
- Voltage - Input (Max):
- 15V
- Voltage - Output (Min/Fixed):
- ±1.25V
- Voltage - Output (Max):
- ±40V
- Current - Output:
- 180mA (Switch), 320mA (Switch)
- Frequency - Switching:
- -
- Synchronous Rectifier:
- No
- Operating Temperature:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 10-DFN (3x3)
LT3463EDD#TRPBF FAQ
1.How can I place an order for LT3463EDD#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT3463EDD#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 LT3463EDD#TRPBF reliable?
The price and inventory of LT3463EDD#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LT3463EDD#TRPBF is usually 5 days.
3.What payment methods are accepted for LT3463EDD#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT3463EDD#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT3463EDD#TRPBF?
LT3463EDD#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT3463EDD#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 LT3463EDD#TRPBF?
For technical support, including LT3463EDD#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT3463EDD#TRPBF requirements.
6.How does Aetrix verify that LT3463EDD#TRPBF is sourced from the original manufacturer or authorized distributors?
All LT3463EDD#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 LT3463EDD#TRPBF meets industry standards.
7.What is the process for return or replacement of LT3463EDD#TRPBF?
All LT3463EDD#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LT3463EDD#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 LT3463EDD#TRPBF part is unused and in its original packaging.
Return procedure for LT3463EDD#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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