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Analog Devices Inc. LT3483ES6#TRPBF
- Part No.:
- LT3483ES6#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Package:
- SOT-23-6 Thin, TSOT-23-6
- Datasheet:
-
LT3483ES6#TRPBF.pdf
- Description:
- IC REG BUCK BOOST ADJ TSOT23-6
- Quantity:
- Payment:
- Shipping:
Inventory:5,234
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Product details
Overview
LT3483ES6#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 bias supplies.
For engineers reviewing the LT3483ES6#TRPBF datasheet, LT3483ES6#TRPBF pinout, LT3483ES6#TRPBF application, or LT3483ES6#TRPBF equivalent, key selection criteria include its 200mA switch current limit, –38V output capability, 40µA no-load IQ, shutdown leakage <1µA, and compatibility with low-profile inductors in handheld and OLED display power designs.
Technical Context
The LT3483ES6#TRPBF implements a constant off-time (COT) control architecture with internal 300ns off-time delay and hysteresis-based FB comparator triggering. Its 10µA precision feedback current enables single-resistor output programming while minimizing loading error on high-impedance feedback networks.
It integrates a 40V/200mA NPN power switch and 40V Schottky diode in a monolithic TSOT-23 package, supporting both inverting charge pump and flyback topologies. Output short-circuit protection is achieved via proprietary current limiting that holds peak switch current at 200mA even under 16V input and hard short conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 2.5V to 16V - supports single-cell Li+ to multi-cell battery inputs without external regulators. |
| Output Voltage Range | Up to –38V - enables high-voltage LCD/OLED bias generation without transformers. |
| Quiescent Current | 40µA active / <1µA shutdown - extends battery life in always-on portable systems. |
| Switch Current Limit | 200mA typical - sets maximum deliverable load current and defines inductor sizing. |
| Switch Off-Time | 300ns fixed - allows use of small-value inductors (e.g., 4.7µH–10µH) and reduces footprint. |
| Feedback Current | 10µA precise - permits single-resistor output setting (RFB = –VOUT/10µA) with negligible loading error. |
| Package | 6-Lead TSOT-23 - 2.9mm × 1.6mm footprint ideal for ultra-compact PCB layouts. |
Pinout & Package
LT3483ES6#TRPBF is housed in a 6-lead plastic TSOT-23 package (JEDEC MO-193), with exposed pad not present. Pin 1 is marked by a notch or dot; thermal performance relies on standard PCB copper land.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| SW (Pin 1) | Switch Collector | Connects to inductor and flying capacitor; carries high dv/dt switching node-requires minimal trace area. |
| GND (Pin 2) | Power Ground | Main return path for switch current and IC ground reference; must be low-inductance connection. |
| FB (Pin 3) | Feedback Input | Senses output voltage via single resistor; 10µA sink current sets regulation point. |
| VIN (Pin 6) | Input Supply | Accepts 2.5V–16V; requires local ≥1µF ceramic bypass near pin. |
| D (Pin 5) | Diode Anode | Internal Schottky anode; connects to flying capacitor cathode and inductor in charge-pump topology. |
| SHDN (Pin 4) | Shutdown Control | Active-high logic input; <0.4V disables device, >1.5V enables operation with <10µA bias current. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated 40V Schottky Diode | Eliminates external diode, reducing BOM count and board area while enabling –38V output capability. |
| One-Resistor Feedback | Uses internal 10µA current source to set output voltage precisely without divider network errors or loading effects. |
| 300ns Fixed Off-Time Control | Enables stable operation across wide load range with minimal external compensation and fast transient response. |
| Output Short-Circuit Protection | Proprietary current limiting holds switch current at 200mA during output shorts-even at 16V input-preventing damage. |
| Low Quiescent Current | 40µA operating / <1µA shutdown current minimizes standby power loss in battery-powered devices. |
Applications
| LCD Bias Supply | OLED Display Power |
|---|---|
Use Scenario: Generating –15V to –25V bias for TFT-LCD gate drivers in handheld tablets and industrial HMIs. IC Role / Device Role / Timing Role: Inverting DC/DC converter providing regulated negative rail from 3.3V or 5V system supply. Use Value: Enables compact, transformerless design with <40mm² solution size and <40µA idle current for extended battery runtime. | Use Scenario: Supplying –10V to –20V cathode bias for AMOLED panels in smartwatches and portable medical displays. IC Role / Device Role / Timing Role: Micropower inverting regulator delivering stable negative voltage with low ripple and fast load transient recovery. Use Value: Supports high-contrast OLED operation using only a 10µH inductor and 0.22µF ceramic output cap-no magnetics redesign needed. |
| Digital Camera CCD Bias | Handheld Computer Power |
Use Scenario: Providing –12V bias for CCD image sensor analog front-end circuits in compact digital cameras. IC Role / Device Role / Timing Role: High-efficiency inverting converter operating from single Li+ cell (3.0V–4.2V) with tight output regulation. Use Value: Delivers 25mA at –12V with >70% efficiency and <30mV ripple-meeting noise-sensitive imaging requirements. | Use Scenario: Generating –5V or –8V auxiliary rails for memory, interface ICs, and analog circuitry in ruggedized PDAs and field data collectors. IC Role / Device Role / Timing Role: Space-optimized DC/DC solution replacing discrete charge pumps or larger buck-boost modules. Use Value: Reduces total solution size by >50% vs. competing 8-pin DFN alternatives while maintaining full –38V capability. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar micropower inverting DC/DC converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LT3463EDD#TRPBF | 8-lead DFN, dual-output (boost + inverter), 250mA switch, ±40V max, 40µA IQ | Supports simultaneous positive and negative rails; larger package but higher integration | Select when dual-rail bias is required and board space allows 2mm × 2mm DFN |
| LT1617ES5#TRPBF | 5-lead TSOT-23, 350mA switch, –34V max, 20µA IQ, no integrated Schottky | Requires external diode; lower IQ but reduced output voltage range and higher component count | Select when lowest possible quiescent current is critical and –34V suffices |
Compared with LT3483ES6#TRPBF, LT3463EDD#TRPBF adds dual-rail capability at the cost of larger footprint and higher complexity, while LT1617ES5#TRPBF offers lower IQ but sacrifices integrated diode convenience and maximum negative output voltage.
Availability
LT3483ES6#TRPBF is available at Aetrix Electronics and suitable for LCD bias, OLED display power, and handheld computer auxiliary rail applications requiring stable component supply, long-term manufacturability, and RoHS-compliant packaging.
Supply support for LT3483ES6#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 its high-performance analog and power management product lines with rigorous reliability testing and automotive-grade qualification options.
The LT3483 series belongs to Linear's micropower DC/DC converter family, engineered specifically for space- and power-constrained portable electronics needing transformerless negative voltage generation with minimal external components.
FAQ
What is the maximum negative output voltage achievable with the LT3483ES6#TRPBF?
The LT3483ES6#TRPBF supports regulated negative outputs up to –38V, enabled by its integrated 40V-rated power switch and Schottky diode. This capability eliminates the need for external transformers in high-voltage bias applications such as LCD gate drivers and CCD sensors. The actual achievable output depends on input voltage, inductor selection, and load conditions-but –38V remains the absolute upper limit per Absolute Maximum Ratings.
Does the LT3483ES6#TRPBF require an external Schottky diode?
No, the LT3483ES6#TRPBF integrates a 40V Schottky diode internally-pin D is the anode terminal of that diode. No external diode is required for basic inverting charge pump or flyback operation. This integration reduces bill-of-materials count, PCB area, and potential failure points. External diodes may be added only in specialized configurations (e.g., synchronous rectification or redundancy), but they are not necessary for standard operation.
How is the output voltage programmed on the LT3483ES6#TRPBF?
The LT3483ES6#TRPBF uses a single feedback resistor connected between the FB pin and the negative output rail. Its internal 10µA current source sinks from FB, so output voltage is set by RFB = –VOUT / 10µA. For example, a –8V output requires an 806kΩ resistor. This one-resistor method avoids divider ratio errors and loading effects common in traditional two-resistor feedback networks.
What is the shutdown current specification for the LT3483ES6#TRPBF?
The LT3483ES6#TRPBF draws less than 1µA of supply current in shutdown mode when the SHDN pin is pulled to GND. This ultra-low leakage ensures minimal battery drain during system sleep or standby states. The shutdown function is fully specified over the full –40°C to +85°C temperature range and does not require external pull-up or timing components.
Can the LT3483ES6#TRPBF drive a 25mA load at –8V from a 3.6V input?
Yes, the LT3483ES6#TRPBF can reliably deliver 25mA at –8V from a 3.6V input, as confirmed by the Typical Application Circuit TA01a in the datasheet. At this operating point, efficiency exceeds 65% and power loss remains below 30mW. Proper selection of a 10µH inductor (e.g., Murata LQH2MCN100K02L), 4.7µF input capacitor, and 0.22µF output capacitor ensures stable regulation and low ripple.
LT3483ES6#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 ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- TSOT-23-6
LT3483ES6#TRPBF FAQ
1.How can I place an order for LT3483ES6#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT3483ES6#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 LT3483ES6#TRPBF reliable?
The price and inventory of LT3483ES6#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LT3483ES6#TRPBF is usually 5 days.
3.What payment methods are accepted for LT3483ES6#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT3483ES6#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT3483ES6#TRPBF?
LT3483ES6#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT3483ES6#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 LT3483ES6#TRPBF?
For technical support, including LT3483ES6#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT3483ES6#TRPBF requirements.
6.How does Aetrix verify that LT3483ES6#TRPBF is sourced from the original manufacturer or authorized distributors?
All LT3483ES6#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 LT3483ES6#TRPBF meets industry standards.
7.What is the process for return or replacement of LT3483ES6#TRPBF?
All LT3483ES6#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LT3483ES6#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 LT3483ES6#TRPBF part is unused and in its original packaging.
Return procedure for LT3483ES6#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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