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Analog Devices Inc. LT3483ES6#TRMPBF
- Part No.:
- LT3483ES6#TRMPBF
- Manufacturer:
- Analog Devices Inc.
- Package:
- SOT-23-6 Thin, TSOT-23-6
- Datasheet:
-
LT3483ES6#TRMPBF.pdf
- Description:
- IC REG BUCK BOOST ADJ TSOT23-6
- Quantity:
- Payment:
- Shipping:
Inventory:2,018
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Product details
Overview
LT3483ES6#TRMPBF 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. Used in OLED bias generation for portable displays.
For engineers reviewing the LT3483ES6#TRMPBF datasheet, LT3483ES6#TRMPBF pinout, LT3483ES6#TRMPBF application, or LT3483ES6#TRMPBF equivalent, key selection criteria include its 200mA switch current limit, –38V max output capability, 40µA no-load IQ, 300ns off-time, and TSOT-23 footprint compatibility with space-constrained handheld and battery-powered systems.
Technical Context
The LT3483ES6#TRMPBF implements a constant off-time, current-limited control architecture with internal 10µA feedback reference, enabling precise one-resistor output programming. Its 200mA switch operates with 200mV VCE(SAT) at 150mA and integrates a 40V Schottky diode for flyback or charge-pump topologies.
It supports two primary configurations: inverting charge pump (for |VOUT| > VIN, e.g., 3.6V → –22V) and inverting flyback (for |VOUT| ≤ VIN, e.g., 3.6V → –5V), both leveraging the same 300ns off-time and internal current limiting to maintain efficiency across 0.1–100mA load range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 2.5V to 16V - supports single-cell Li+ (3.0–4.2V), dual-cell alkaline (2.5–3.6V), and industrial 12V rails without external regulators. |
| Max Output Voltage | –38V - enables high-voltage OLED and LCD bias without transformers or external diodes. |
| Switch Current Limit | 200mA - sets maximum deliverable output current in flyback mode; limits fault energy during short-circuit events. |
| Quiescent Current | 40µA - minimizes battery drain in always-on portable devices; drops to <1µA in shutdown. |
| Switch Off-Time | 300ns - allows use of low-profile 4.7µH–10µH inductors and ceramic capacitors, reducing solution size to ~40mm². |
| Feedback Reference | 10µA - enables single-resistor output programming (R1 = –VOUT/10µA) with negligible loading error. |
| VCE(SAT) | 200mV at 150mA - reduces conduction loss and thermal rise in compact TSOT-23 package. |
Pinout & Package
LT3483ES6#TRMPBF is housed in a 6-lead plastic TSOT-23 package (0.95mm × 2.90mm × 1.00mm), optimized for high-density portable PCB layouts. The exposed pad is absent; thermal dissipation relies on copper area under pins 2 (GND) and 3 (GND).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| FB (Pin 1) | Feedback Input | Connects to resistor divider (or single resistor to VOUT) to set output voltage via 10µA internal reference current. |
| GND (Pin 2) | Power Ground | Main ground return for internal circuitry, switch, and Schottky cathode; must be low-impedance connection to PCB ground plane. |
| GND (Pin 3) | Power Ground | Dual GND pins reduce ground loop impedance and improve stability in high-frequency switching operation. |
| SW (Pin 4) | Switch Node | Drives external inductor; carries high dv/dt switching waveform - requires shortest possible trace to minimize EMI and ringing. |
| D (Pin 5) | Schottky Anode | Internal 40V Schottky anode; connects to flying capacitor or external inductor in flyback configuration - critical path for energy transfer. |
| VIN (Pin 6) | Input Supply | Accepts 2.5V–16V input; requires ≥1µF local ceramic bypass capacitor placed adjacent to pin to suppress supply noise. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated 40V Schottky Diode | Eliminates external diode, reduces BOM count and board area, and ensures consistent reverse recovery performance across temperature. |
| One-Resistor Feedback | Uses internal 10µA reference to set output voltage with R1 = –VOUT/10µA - simplifies design, avoids resistor ratio errors and feedback loading effects. |
| 300ns Fixed Off-Time Control | Enables stable operation with small inductors (4.7µH–10µH) and ceramic capacitors, achieving >70% efficiency at 25mA load with 3.6V input. |
| Output Short-Circuit Protection | Proprietary current limiting prevents damage during sustained output shorts, even at 16V input - no external foldback circuitry required. |
| Low 40µA Quiescent Current | Extends battery life in standby mode for handheld instruments and medical sensors where continuous bias is needed but load current is intermittent. |
Applications
| OLED Display Bias | LCD Panel Bias |
|---|---|
Use Scenario: Generating –15V to –22V bias for OLED anode/cathode drive in smartwatches and AR glasses. IC Role / Device Role / Timing Role: Inverting charge-pump DC/DC converter providing regulated negative rail with minimal ripple and fast transient response. Use Value: Enables compact, transformerless high-voltage bias using only one inductor and two ceramics - solution size under 40mm². | Use Scenario: Supplying –10V to –18V gate drive for TFT-LCD source drivers in portable tablets and e-readers. IC Role / Device Role / Timing Role: Micropower inverting regulator operating from single Li+ cell (3.6V nominal) with tight output regulation. Use Value: Delivers stable bias with 40µA quiescent current, extending battery runtime between charges by >15% versus higher-IQ alternatives. |
| Handheld Instrument Power | Digital Camera CCD Bias |
Use Scenario: Providing –5V rail for analog front-end op-amps and ADC references in portable multimeters and data loggers. IC Role / Device Role / Timing Role: Low-noise inverting flyback converter with integrated Schottky, minimizing component count and layout sensitivity. Use Value: Achieves <10mV output ripple with 4.7µF output capacitor - sufficient for 16-bit precision measurement circuits. | Use Scenario: Generating –8V to –12V for CCD sensor substrate bias in compact digital cameras and endoscopic imaging modules. IC Role / Device Role / Timing Role: High-efficiency inverting converter supporting pulsed loads up to 100mA with fast recovery from shutdown. Use Value: 300ns off-time and 200mA switch allow rapid charge/discharge cycles without voltage droop or thermal throttling. |
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 |
|---|---|---|---|
| LT1617ES6#TRMPBF | Lower 350mA switch limit, 20µA IQ, same TSOT-23 package, but no integrated Schottky - requires external diode. | Better suited for lower-output-voltage (≤–20V), higher-current (≥50mA) applications where external diode placement is acceptable. | Select when prioritizing ultra-low IQ over integration; verify external diode thermal and layout impact. |
| LT3463EDD#TRPBF | DFN-8 package, dual-output (boost + inverter), 250mA switch, integrated Schottkys, 40µA IQ - larger footprint but added functionality. | Applicable where system requires both positive and negative rails from single input - not a drop-in replacement due to different pinout and package. | Choose when needing dual-rail generation; avoid if board space is constrained to TSOT-23 footprint. |
Compared with LT3483ES6#TRMPBF, LT1617ES6#TRMPBF offers lower quiescent current but requires external components and lacks Schottky integration, while LT3463EDD#TRPBF provides dual-rail capability in a larger DFN package - neither matches the LT3483ES6#TRMPBF's combination of TSOT-23 size, integrated Schottky, and –38V capability.
Availability
LT3483ES6#TRMPBF is available at Aetrix Electronics and suitable for OLED display bias, handheld instrument power, and digital camera CCD bias requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for LT3483ES6#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 acquired Linear Technology in 2017 and maintains full technical and manufacturing continuity for legacy Linear power products.
The LT3483 series belongs to Linear's micropower inverting DC/DC converter product line, designed specifically for space- and power-constrained portable electronics requiring high-voltage negative rails without transformers.
FAQ
What is the maximum negative output voltage achievable with the LT3483ES6#TRMPBF?
The LT3483ES6#TRMPBF supports regulated negative outputs up to –38V, enabled by its 40V internal power switch and integrated Schottky diode. This capability is confirmed in the Absolute Maximum Ratings and Typical Applications sections of the datasheet, and applies across the full –40°C to 85°C operating temperature range for the E-grade part. Output voltage is set by a single feedback resistor per the formula R1 = –VOUT/10µA.
Does the LT3483ES6#TRMPBF require an external Schottky diode?
No, the LT3483ES6#TRMPBF integrates a 40V Schottky diode internally - explicitly stated in the FEATURES section ("Internal 40V Schottky Diode") and PIN FUNCTIONS (Pin D = "Anode Terminal of Integrated Schottky Diode"). No external diode is needed in either inverting flyback or charge-pump configurations, reducing bill-of-materials count and PCB area.
What is the shutdown current specification for the LT3483ES6#TRMPBF?
The LT3483ES6#TRMPBF draws less than 1µA in shutdown mode, as specified in the ELECTRICAL CHARACTERISTICS table under "Quiescent Current in Shutdown" (max 1µA, VSHDN = GND). This ultra-low shutdown current is critical for battery-backed systems where leakage must be minimized over extended storage periods.
Can the LT3483ES6#TRMPBF be used in inverting flyback and inverting charge-pump topologies?
Yes, the LT3483ES6#TRMPBF supports both topologies. The datasheet's OPERATION section details implementation for inverting flyback (e.g., 3.6V → –5V) and inverting charge pump (e.g., 3.6V → –22V), with distinct external component requirements. Pin D serves as the Schottky anode in both cases, and the 300ns off-time and 200mA switch are optimized for either configuration.
What package type and dimensions does the LT3483ES6#TRMPBF use?
The LT3483ES6#TRMPBF uses a 6-lead plastic TSOT-23 package (S6), measuring 0.95mm × 2.90mm × 1.00mm with 0.95mm lead pitch. Package drawings confirm pin 1 identification via notch and top mark "LTBKX", and thermal characteristics specify θJA = 192°C/W. This is distinct from the 8-lead DFN variant (LT3483EDC#TRMPBF).
LT3483ES6#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, 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 ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- TSOT-23-6
LT3483ES6#TRMPBF FAQ
1.How can I place an order for LT3483ES6#TRMPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT3483ES6#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 LT3483ES6#TRMPBF reliable?
The price and inventory of LT3483ES6#TRMPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LT3483ES6#TRMPBF is usually 5 days.
3.What payment methods are accepted for LT3483ES6#TRMPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT3483ES6#TRMPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT3483ES6#TRMPBF?
LT3483ES6#TRMPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT3483ES6#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 LT3483ES6#TRMPBF?
For technical support, including LT3483ES6#TRMPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT3483ES6#TRMPBF requirements.
6.How does Aetrix verify that LT3483ES6#TRMPBF is sourced from the original manufacturer or authorized distributors?
All LT3483ES6#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 LT3483ES6#TRMPBF meets industry standards.
7.What is the process for return or replacement of LT3483ES6#TRMPBF?
All LT3483ES6#TRMPBF units undergo pre-shipment inspection (PSI). If there is an issue with LT3483ES6#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 LT3483ES6#TRMPBF part is unused and in its original packaging.
Return procedure for LT3483ES6#TRMPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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