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Analog Devices Inc. LT3463AEDD#TRPBF
- Part No.:
- LT3463AEDD#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Package:
- 10-WFDFN Exposed Pad
- Datasheet:
-
LT3463AEDD#TRPBF.pdf
- Description:
- IC REG BST CHG PUMP ADJ DL 10DFN
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
LT3463AEDD#TRPBF from Analog Devices (formerly Linear Technology) is a dual micropower DC/DC converter IC with integrated 42V NPN switches and internal Schottky diodes, delivering regulated +15V @ 10mA and –8V @ 50mA outputs from a 2.4V–15V input. It features 20µA quiescent current per channel, 300ns minimum off-time, and operates in a 10-lead 3mm × 3mm DFN package with exposed GND pad.
For engineers reviewing the LT3463AEDD#TRPBF datasheet, LT3463AEDD#TRPBF pinout, LT3463AEDD#TRPBF application, or LT3463AEDD#TRPBF equivalent, key selection criteria include dual-output polarity support, 400mA negative-channel current limit, ±40V max output capability, shutdown control per channel, and compatibility with low-profile 10µH inductors in space-constrained portable systems.
Technical Context
The LT3463AEDD#TRPBF implements two independent constant off-time switching regulators: Switcher 1 is a boost topology generating positive output; Switcher 2 is an inverting topology generating negative output. Each uses internal 42V NPN power switches with 180mV VCE(SAT) at 150mA and integrated Schottky diodes rated for 42V reverse voltage and 750mV forward drop at 150mA.
Feedback is split: FB1 senses the positive output against a 1.25V reference (VREF), while FB2 senses the negative output referenced to VREF, enabling precise regulation of both rails. The LT3463A variant distinguishes itself from LT3463 by raising the negative-channel current limit from 250mA to 400mA, confirmed across temperature (–40°C to 85°C).
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. |
| Positive Output Current Limit | 250mA - sets maximum sustainable load for +VOUT1; enables robust biasing of CCDs or LCD segments under transient loads. |
| Negative Output Current Limit | 400mA - unique to LT3463A; allows higher drive capability for –VOUT2 in applications like active matrix LCD gate drivers. |
| Quiescent Current | 20µA per converter - ensures >1000-hour battery life in always-on sensor nodes or standby camera modules. |
| Switch Off-Time | 300ns minimum - permits use of compact 4.7µH–10µH inductors and ceramic capacitors, reducing PCB area by >40% vs. legacy 1µs controllers. |
| Max Output Voltage | ±40V - eliminates need for external transformer or charge-pump ICs when generating high-voltage bias for image sensors or display backlights. |
| Operating Temperature | –40°C to +85°C - validated across industrial ambient range; junction-to-ambient thermal resistance θJA = 43°C/W ensures stable operation without forced cooling. |
Pinout & Package
LT3463AEDD#TRPBF is housed in a 10-lead 3mm × 3mm plastic DFN package with exposed thermal pad (Pin 11) that must be soldered directly to the PCB ground plane for electrical integrity and thermal performance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| FB1 (Pin 10) | Positive output feedback input | Connects to resistor divider from VOUT1 to set +VOUT via 1.25V reference; bias current <50nA minimizes divider error. |
| SHDN1 (Pin 9) | Positive converter enable control | Logic-level input: >1.5V enables Switcher 1; <0.3V disables it with <1µA shutdown current. |
| SHDN2 (Pin 8) | Negative converter enable control | Independent logic-level enable for Switcher 2; allows asymmetric power sequencing in dual-rail systems. |
| VREF (Pin 7) | Internal 1.25V reference output | Stable reference used with FB2 to program negative output; line regulation <0.1%/V ensures accuracy over input range. |
| FB2 (Pin 6) | Negative output feedback input | Senses voltage between VREF and VOUT2; trip point 0–12mV enables precise –VOUT setting with minimal external components. |
| VOUT1 (Pin 1) | Positive output cathode node | Output of internal Schottky diode (anode tied to SW1); requires external capacitor for ripple filtering and stability. |
| SW1 (Pin 2) | Positive converter switch collector | High-di/dt node; trace area must be minimized to reduce EMI; connects to inductor and internal NPN switch. |
| VIN (Pin 3) | Main input supply | Shared input for both converters; requires local 1µF ceramic bypass capacitor placed adjacent to pin. |
| SW2 (Pin 4) | Negative converter switch collector | Collector of second NPN switch; same EMI-sensitive routing rules apply as SW1. |
| D2 (Pin 5) | Inverting converter diode anode | Anode of internal Schottky diode (cathode tied to GND); forms return path for negative output current. |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent shutdown controls | SHDN1 and SHDN2 allow staggered startup, dynamic rail disabling, and ultra-low-power sleep modes without external logic. |
| Integrated 42V Schottky diodes | Eliminates two external diodes, reduces BOM count, and guarantees 750mV VF at 150mA - critical for efficiency in battery-powered CCD bias supplies. |
| Low 180mV VCE(SAT) at 150mA | Minimizes conduction loss in both channels, sustaining >80% efficiency at 10–50mA loads typical in imaging and display biasing. |
| 300ns minimum off-time architecture | Enables use of 10µH inductors instead of 47µH, cutting solution size by 60% and lowering cost in handheld digital cameras. |
| Exposed thermal pad (Pin 11) | Reduces θJA to 43°C/W - maintains safe junction temperature (<125°C) at full 400mA negative output with no heatsink. |
Applications
| CCD Bias Supply | LCD Bias Generation |
|---|---|
Use Scenario: Powering charge-coupled device (CCD) image sensors requiring tightly regulated +15V and –8V rails for pixel clocking and substrate bias. IC Role / Device Role / Timing Role: Dual-output DC/DC converter providing isolated, low-noise analog bias voltages synchronized to imaging frame rate. Use Value: 20µA quiescent current extends battery life in portable inspection cameras; 400mA negative limit supports fast CCD reset transients without rail collapse. | Use Scenario: Generating ±20V gate driver voltages for active-matrix LCD panels in handheld computers and medical displays. IC Role / Device Role / Timing Role: Compact dual-rail power source replacing discrete boost/invert stages and external diodes. Use Value: 3mm × 3mm DFN footprint fits within tight bezel constraints; ±40V capability covers full range of TFT-LCD VGH/VGL requirements. |
| Digital Camera Power | Handheld Computer Core Bias |
Use Scenario: Supplying programmable bias for autofocus actuators and flash LED drivers in compact digital cameras. IC Role / Device Role / Timing Role: Micropower dual converter delivering stable +15V for lens control and –8V for sensor interface circuitry. Use Value: Independent SHDN pins enable power gating of unused subsystems; 300ns off-time allows use of 4.7µH inductors to minimize height (<0.8mm). | Use Scenario: Providing auxiliary bias rails for touch controller ICs, audio codecs, and RF front-end modules in ruggedized handheld terminals. IC Role / Device Role / Timing Role: High-voltage dual converter supporting mixed-signal SoC peripheral voltage requirements. Use Value: Input range down to 2.4V ensures operation across full Li-ion discharge curve (4.2V → 2.7V); 125°C junction rating supports sealed industrial enclosures. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-output DC/DC converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LT3463EDD#TRPBF | Identical pinout and package; negative channel current limit is 250mA (vs. 400mA in LT3463AEDD#TRPBF). | Suitable only where –VOUT load ≤250mA; not recommended for high-current LCD gate drivers or fast CCD reset. | Select LT3463EDD#TRPBF only if design load stays below 250mA on negative rail and cost sensitivity outweighs performance margin. |
| LT1945EMS#TRPBF | MSOP-10 package; 350mA current limit per channel; wider 1.2V–15V input range; no integrated Schottky diodes. | Requires two external Schottky diodes; larger footprint; higher BOM count but supports lower VIN start-up. | Choose LT1945EMS#TRPBF when input may dip below 2.4V or when MSOP thermal profile is preferred over DFN. |
Compared with LT3463EDD#TRPBF, LT3463AEDD#TRPBF delivers 60% higher negative output current without layout change; versus LT1945EMS#TRPBF, it reduces component count and board area but requires strict adherence to 2.4V minimum input.
Availability
LT3463AEDD#TRPBF is available at Aetrix Electronics and suitable for CCD bias supply, LCD panel driving, and handheld computer power management requiring stable component supply, long-term lifecycle assurance, and RoHS-compliant packaging.
Supply support for LT3463AEDD#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 LT3463AEDD#TRPBF belongs to Linear's micropower DC/DC converter product line, engineered specifically for portable imaging, display, and instrumentation systems demanding dual-polarity, high-voltage, low-quiescent-current power conversion in minimal PCB area.
FAQ
What is the maximum output voltage achievable with LT3463AEDD#TRPBF?
The LT3463AEDD#TRPBF supports up to +40V on VOUT1 and –40V on VOUT2, limited by its 42V internal switch and Schottky diode ratings. This is confirmed in Absolute Maximum Ratings and Typical Application circuits (e.g., ±20V and +15V/–8V configurations). Exceeding ±40V risks damage to internal switches or diodes.
Does LT3463AEDD#TRPBF require external diodes?
No. The LT3463AEDD#TRPBF integrates two 42V Schottky diodes: one cathode connected to VOUT1 (anode to SW1), and one anode connected to D2 (cathode to GND). These eliminate the need for external diodes in standard boost and inverting configurations, reducing BOM count and board area.
How does the LT3463AEDD#TRPBF differ from LT3463EDD#TRPBF?
The LT3463AEDD#TRPBF differs from LT3463EDD#TRPBF solely in the negative-channel current limit: LT3463AEDD#TRPBF specifies 320–460mA (typ. 400mA), while LT3463EDD#TRPBF specifies 180–320mA (typ. 250mA). All other electrical characteristics, pinout, package, and functionality are identical.
What is the role of the exposed pad (Pin 11) on LT3463AEDD#TRPBF?
The exposed pad (Pin 11) on LT3463AEDD#TRPBF is electrically connected to GND and serves as the primary thermal and electrical ground path. Per datasheet requirement, it must be soldered to a large PCB copper pour to achieve θJA = 43°C/W and ensure stable operation at full 400mA negative output current.
Can LT3463AEDD#TRPBF operate from a 2.4V input?
Yes. The LT3463AEDD#TRPBF has a guaranteed minimum input voltage of 2.4V (with 2.2V typical), verified across –40°C to +85°C. At 2.4V input, it can still deliver regulated +15V and –8V outputs at reduced load capacity, making it suitable for end-of-life battery operation in portable devices.
LT3463AEDD#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)
LT3463AEDD#TRPBF FAQ
1.How can I place an order for LT3463AEDD#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT3463AEDD#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 LT3463AEDD#TRPBF reliable?
The price and inventory of LT3463AEDD#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LT3463AEDD#TRPBF is usually 5 days.
3.What payment methods are accepted for LT3463AEDD#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT3463AEDD#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT3463AEDD#TRPBF?
LT3463AEDD#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT3463AEDD#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 LT3463AEDD#TRPBF?
For technical support, including LT3463AEDD#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT3463AEDD#TRPBF requirements.
6.How does Aetrix verify that LT3463AEDD#TRPBF is sourced from the original manufacturer or authorized distributors?
All LT3463AEDD#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 LT3463AEDD#TRPBF meets industry standards.
7.What is the process for return or replacement of LT3463AEDD#TRPBF?
All LT3463AEDD#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LT3463AEDD#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 LT3463AEDD#TRPBF part is unused and in its original packaging.
Return procedure for LT3463AEDD#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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