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Analog Devices Inc. LT3483IS6#TRPBF
- Part No.:
- LT3483IS6#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Package:
- SOT-23-6 Thin, TSOT-23-6
- Datasheet:
-
LT3483IS6#TRPBF.pdf
- Description:
- IC REG BUCK BOOST ADJ TSOT23-6
- Quantity:
- Payment:
- Shipping:
Inventory:1,796
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Product details
Overview
LT3483IS6#TRPBF from Analog Devices (formerly Linear Technology) is a micropower inverting DC/DC converter with integrated 40V Schottky diode and one-resistor feedback, delivering regulated negative outputs up to –38V from 2.5V–16V input. It features 40µA quiescent current, 300ns fixed off-time control, and a 200mA internal power switch in a 6-lead TSOT-23 package. Designed for space-constrained portable biasing applications including OLED and LCD displays.
For engineers reviewing the LT3483IS6#TRPBF datasheet, LT3483IS6#TRPBF pinout, LT3483IS6#TRPBF application, or LT3483IS6#TRPBF equivalent, key selection criteria include its –40°C to 125°C operating temperature range, 200mV VCE(SAT) at 150mA, shutdown current <1µA, and compatibility with low-profile inductors and ceramic capacitors in compact inverting charge pump topologies.
Technical Context
The LT3483IS6#TRPBF employs a constant off-time (COT) control scheme with internal 300ns off-time delay and hysteresis-based FB comparator (10mV trip hysteresis), enabling high efficiency across wide load ranges without external compensation. Its integrated 40V/200mA NPN switch and on-chip Schottky diode eliminate external rectification in flyback or charge pump configurations.
Feedback uses a precisely trimmed 10µA sink current, allowing output voltage setting via single resistor R1 = –VOUT/10µA. The device supports both inverting flyback (dual-inductor) and inverting charge pump (single-inductor + flying capacitor) topologies, with short-circuit protection achieved via proprietary switch-current limiting.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VIN Range | 2.5V to 16V - supports single-cell Li+ to multi-cell battery inputs and industrial rails. |
| Output Voltage Range | Up to –38V - enables high-voltage negative bias without transformers or external diodes. |
| Quiescent Current | 40µA active / <1µA shutdown - extends battery life in always-on portable systems. |
| Switch Current Limit | 200mA (typ) - defines maximum deliverable output current in charge pump/flyback modes. |
| VCE(SAT) | 200mV at 150mA - minimizes conduction loss and thermal rise in the integrated switch. |
| FB Current Accuracy | –10µA ±0.3µA - ensures ±3% output voltage accuracy with standard 1% resistors. |
| Off-Time | 300ns (fixed) - enables use of small 4.7µH–10µH inductors and reduces switching loss at light loads. |
Pinout & Package
LT3483IS6#TRPBF is housed in a 6-lead TSOT-23 (ThinSOT) package, 2.9mm × 1.6mm × 0.9mm, with exposed pad not present. Pin 1 is marked by a dot; pin numbering follows standard TSOT-23 orientation (top view, notch left).
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 (FB) | Feedback Input | Sinks precise 10µA current; connects to output via single resistor R1 to set VOUT. |
| 2 (GND) | Power Ground | Main return path for switch, diode, and internal circuitry; must be low-impedance PCB connection. |
| 3 (SW) | Switch Node | Drives external inductor; carries high di/dt; requires minimal trace length and ground plane adjacency. |
| 4 (SHDN) | Shutdown Control | Active-high logic input; <0.4V disables device (IQ <1µA); >1.5V enables operation. |
| 5 (D) | Diode Anode | Connects to cathode of external Schottky (charge pump) or flying capacitor (flyback); handles reverse recovery current. |
| 6 (VIN) | Input Supply | Accepts 2.5V–16V; requires ≥1µF local ceramic bypass to suppress high-frequency noise and supply transients. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated 40V Schottky Diode | Eliminates external diode, reducing BOM count and board area in inverting topologies. |
| One-Resistor Feedback | Uses internal 10µA current source to simplify output programming and avoid feedback divider loading errors. |
| Low 300ns Off-Time | Enables use of sub-10µH inductors and 0.22µF–4.7µF ceramic output capacitors for ultra-compact designs. |
| Output Short-Circuit Protection | Proprietary current limiting prevents damage during sustained output faults, even at 16V input. |
| –40°C to 125°C Operation | Qualified for extended temperature industrial and automotive display bias applications without derating. |
Applications
| OLED Display Bias | LCD Panel Bias |
|---|---|
Use Scenario: Generating stable –15V to –22V rail for OLED pixel driver ICs in smartwatches and AR glasses. IC Role / Device Role / Timing Role: Primary inverting DC/DC converter providing regulated negative supply with low ripple and fast transient response. Use Value: Enables high-contrast, low-power OLED operation using only 40µA quiescent current and 40mm² total solution size. | Use Scenario: Supplying –8V gate drive voltage for TFT-LCD source drivers in handheld tablets and medical monitors. IC Role / Device Role / Timing Role: Compact inverting charge pump regulator delivering precise negative bias with minimal EMI. Use Value: Achieves <3% efficiency loss with optional 10Ω series resistor while maintaining <20mV output ripple. |
| Digital Camera CCD Bias | Industrial Sensor Interface |
Use Scenario: Providing –12V analog bias for CCD image sensors in portable diagnostic cameras. IC Role / Device Role / Timing Role: Low-noise inverting flyback converter supporting dual-inductor configuration for tight regulation. Use Value: Delivers 8mA at –12V with 65% efficiency at 3.6V input, leveraging integrated 200mA switch and 200mV VCE(SAT). | Use Scenario: Generating –5V reference supply for precision ADCs and op-amps in factory automation I/O modules. IC Role / Device Role / Timing Role: Micropower inverting regulator operating continuously across –40°C to 125°C ambient. Use Value: Maintains ±1% output accuracy over full temperature range using internal 10µA FB current and hysteresis-stabilized control. |
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 |
|---|---|---|---|
| LT3483ES6#TRPBF | Same silicon, rated for –40°C to 85°C instead of –40°C to 125°C; identical electrical specs and pinout. | Not suitable for high-temperature industrial or under-hood automotive environments. | Select LT3483IS6#TRPBF when extended temperature operation is required; otherwise LT3483ES6#TRPBF offers cost parity for commercial-grade designs. |
| LT1931ES6#TRPBF | Higher 1A switch current, 1.2MHz/2.2MHz switching, but 5.8mA quiescent current vs. 40µA; no integrated Schottky. | Better for higher-output-current applications (>50mA), but unsuitable for ultra-low-power battery operation. | Choose LT1931ES6#TRPBF only when output current exceeds 30mA and efficiency at medium loads outweighs quiescent current penalty. |
Compared with LT3483ES6#TRPBF, LT3483IS6#TRPBF provides identical functionality with guaranteed performance at 125°C junction temperature-critical for sealed enclosures or high-power-density layouts. Versus LT1931ES6#TRPBF, it trades higher peak current capability for 145× lower quiescent current and integrated diode, making it optimal for micropower biasing where load currents remain below 25mA.
Availability
LT3483IS6#TRPBF is available at Aetrix Electronics and suitable for OLED bias, LCD panel power, and industrial sensor interface applications requiring stable component supply, long-term lifecycle support, and guaranteed extended-temperature performance.
Supply support for LT3483IS6#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 acquired Linear Technology in 2017 and maintains full product support, datasheet documentation, and application engineering for legacy Linear parts.
The LT3483 family is part of Linear's micropower DC/DC converter portfolio, designed specifically for compact, high-efficiency negative voltage generation in portable and space-constrained electronic systems.
FAQ
What is the maximum negative output voltage achievable with the LT3483IS6#TRPBF?
The LT3483IS6#TRPBF supports regulated negative outputs up to –38V, enabled by its 40V-rated internal power switch and integrated Schottky diode. This capability eliminates the need for external transformers or high-voltage discrete components in applications such as high-voltage OLED bias and industrial sensor interfaces. Output voltage is set by a single feedback resistor per the formula R1 = –VOUT/10µA.
Does the LT3483IS6#TRPBF require an external Schottky diode?
No, the LT3483IS6#TRPBF integrates a 40V Schottky diode internally, removing the need for an external diode in both inverting flyback and inverting charge pump configurations. This integration reduces bill-of-materials count, PCB footprint, and potential failure points. The D pin connects directly to the anode of the internal diode and interfaces with the flying capacitor or external inductor accordingly.
What is the shutdown current specification for the LT3483IS6#TRPBF?
The LT3483IS6#TRPBF draws less than 1µA in shutdown mode when the SHDN pin is pulled to GND. This ultra-low shutdown current preserves battery energy in always-connected portable devices such as handheld medical instruments and IoT edge sensors. The device resumes full operation within microseconds upon SHDN pin assertion, with no startup sequencing required.
Can the LT3483IS6#TRPBF operate from a 2.5V input supply?
Yes, the LT3483IS6#TRPBF operates across a 2.5V to 16V input range, making it compatible with single-cell Li+ batteries (2.7V–4.2V), NiMH stacks, and industrial 3.3V/5V rails. At 2.5V input, it maintains regulation down to –8V output in typical charge pump configurations, with efficiency preserved by its 40µA quiescent current and fixed off-time architecture.
Is the LT3483IS6#TRPBF pin-compatible with the LT3483A variants?
No, the LT3483IS6#TRPBF is not pin-compatible with LT3483A variants. While both share the same 6-lead TSOT-23 package outline, the LT3483A features a 400mA switch current limit versus 200mA in the LT3483IS6#TRPBF, and differences in internal current-sense thresholds and thermal design prevent direct substitution without validation. Always consult the respective datasheets before interchanging.
LT3483IS6#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, Step-Up/Step-Down
- Output Configuration:
- Negative
- Topology:
- Buck, Boost, Charge Pump, Flyback
- Output Type:
- Adjustable
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 2.5V
- Voltage - Input (Max):
- 16V
- Voltage - Output (Min/Fixed):
- -2.5V
- Voltage - Output (Max):
- -38V
- Current - Output:
- 170mA (Switch)
- Frequency - Switching:
- -
- Synchronous Rectifier:
- No
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- TSOT-23-6
LT3483IS6#TRPBF FAQ
1.How can I place an order for LT3483IS6#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT3483IS6#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 LT3483IS6#TRPBF reliable?
The price and inventory of LT3483IS6#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LT3483IS6#TRPBF is usually 5 days.
3.What payment methods are accepted for LT3483IS6#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT3483IS6#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT3483IS6#TRPBF?
LT3483IS6#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT3483IS6#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 LT3483IS6#TRPBF?
For technical support, including LT3483IS6#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT3483IS6#TRPBF requirements.
6.How does Aetrix verify that LT3483IS6#TRPBF is sourced from the original manufacturer or authorized distributors?
All LT3483IS6#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 LT3483IS6#TRPBF meets industry standards.
7.What is the process for return or replacement of LT3483IS6#TRPBF?
All LT3483IS6#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LT3483IS6#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 LT3483IS6#TRPBF part is unused and in its original packaging.
Return procedure for LT3483IS6#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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