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Analog Devices Inc. LT3483IS6#TRMPBF
- Part No.:
- LT3483IS6#TRMPBF
- Manufacturer:
- Analog Devices Inc.
- Package:
- SOT-23-6 Thin, TSOT-23-6
- Datasheet:
-
LT3483IS6#TRMPBF.pdf
- Description:
- IC REG BUCK BOOST ADJ TSOT23-6
- Quantity:
- Payment:
- Shipping:
Inventory:1,133
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Product details
Overview
LT3483IS6#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 LT3483IS6#TRMPBF datasheet, LT3483IS6#TRMPBF pinout, LT3483IS6#TRMPBF application, or LT3483IS6#TRMPBF 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 for space-constrained battery-powered systems.
Technical Context
The LT3483IS6#TRMPBF implements 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 load currents from 0.1mA to 25mA. Its architecture integrates a 40V/200mA NPN switch and on-chip Schottky diode, eliminating external rectification in inverting charge pump topologies.
Operation relies on precise 10µA feedback current sourcing from the FB pin-enabling single-resistor output programming-and uses internal current limiting (200mA typ) and short-circuit protection without external sensing. The TSOT-23 package supports thermal performance up to 125°C ambient via optimized PCB ground coupling.
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, and industrial 12V rails. |
| Output Voltage Range | Up to –38V - enables high-voltage OLED and LCD bias without transformers or external diodes. |
| Quiescent Current | 40µA active / <1µA shutdown - extends battery life in always-on portable instrumentation. |
| Switch Current Limit | 200mA (typ) - sets maximum inductor ramp current and limits fault energy during output shorts. |
| FB Feedback Current | 10µA (precisely trimmed) - allows single-resistor output setting with negligible loading error. |
| Switch Off-Time | 300ns (fixed) - enables use of sub-10µH inductors and reduces switching loss at light loads. |
| VCE(SAT) | 200mV at 150mA - minimizes conduction loss and improves efficiency in 10–25mA output range. |
Pinout & Package
LT3483IS6#TRMPBF is housed in a 6-lead TSOT-23 (S6) package with exposed pad not present. Pin 1 is marked by a dot; pin numbering follows standard TSOT-23 orientation (top view, notch left).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| FB (Pin 1) | Feedback input | Sinks precisely 10µA to set output voltage via R1 = –VOUT/10µA; high-impedance node requiring minimal trace area. |
| GND (Pin 2) | Power and signal ground | Primary return path for switch current, FB reference, and shutdown logic; must connect to low-impedance PCB ground plane. |
| SW (Pin 3) | Switch collector | Drives external inductor; carries high di/dt pulses - requires shortest possible trace to minimize EMI and voltage ringing. |
| VIN (Pin 4) | Input supply | Accepts 2.5–16V; requires ≥1µF local ceramic bypass capacitor placed adjacent to pin. |
| D (Pin 5) | Integrated Schottky anode | Connects to flying capacitor cathode and inductor; internal 40V rating eliminates need for external diode in charge pump topology. |
| SHDN (Pin 6) | Shutdown control | Active-high enable: >1.5V turns on, <0.4V forces shutdown with <1µA IQ. |
Key Features
| Feature | Design Value |
|---|---|
| One-resistor feedback | Eliminates voltage-divider network and associated loading error; simplifies layout and reduces BOM count. |
| Integrated 40V Schottky diode | Removes external diode footprint and forward-drop uncertainty; ensures consistent flyback conduction in compact layouts. |
| 300ns fixed off-time control | Enables stable operation with tiny inductors (e.g., 4.7µH) and maintains high efficiency down to 0.1mA load. |
| Output short-circuit protection | Proprietary current limiting prevents damage during sustained output faults - no external foldback circuitry required. |
| Low 200mV VCE(SAT) | Reduces conduction loss by >40% vs. typical 350mV switches, directly improving efficiency at 10–25mA output currents. |
Applications
| OLED Display Bias | LCD Panel Bias |
|---|---|
Use Scenario: Generating –15V to –22V bias for organic LED pixel drivers in handheld medical monitors. IC Role / Device Role / Timing Role: Inverting charge pump DC/DC converter providing regulated negative rail with low ripple and fast transient response. Use Value: Enables high-contrast monochrome OLEDs using only one inductor and one flying capacitor - reducing solution size to <40mm². | Use Scenario: Supplying –8V gate drive for STN-LCD segment drivers in ruggedized industrial HMIs. IC Role / Device Role / Timing Role: Micropower inverting regulator delivering stable negative voltage under variable backlight load conditions. Use Value: 40µA quiescent current preserves battery runtime during display idle periods without compromising startup time. |
| Digital Camera Backlight | Portable Instrumentation Power |
Use Scenario: Driving white LED arrays requiring –7V to –12V in compact digital cameras with Li+ battery input. IC Role / Device Role / Timing Role: High-efficiency inverting converter operating in discontinuous conduction mode for low-noise backlight control. Use Value: 300ns off-time and 200mA switch support efficient operation with 6.8µH inductors - minimizing EMI near image sensors. | Use Scenario: Providing isolated negative supply for precision op-amp rails in handheld multimeters and data loggers. IC Role / Device Role / Timing Role: Low-noise, thermally robust inverting DC/DC stage powering analog front-end circuitry. Use Value: –40°C to 125°C rated operation ensures reliability in field-deployed equipment exposed to wide ambient swings. |
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 |
|---|---|---|---|
| LT3463EDD#PBF | DFN-8 package; dual-output (boost + inverter); 250mA switch; ±40V max output | Supports simultaneous positive and negative rails; larger footprint but higher integration | Select when dual-rail bias is needed and board space permits DFN-8; not pin-compatible. |
| LT1931ES5#TRMPBF | TSOT-23-5 package; 1A switch; 1.2MHz switching; no integrated Schottky | Requires external diode; higher output current capability but greater component count and layout sensitivity | Select for higher load current (>50mA) where external diode placement is acceptable. |
Compared with LT3483IS6#TRMPBF, LT3463EDD#PBF offers dual-rail flexibility at the cost of larger package and no shutdown current advantage, while LT1931ES5#TRMPBF trades integrated diode simplicity for higher current and faster switching - both require redesign of feedback and output networks.
Availability
LT3483IS6#TRMPBF is available at Aetrix Electronics and suitable for OLED bias, LCD panel power, and portable instrumentation requiring stable component supply across extended temperature ranges.
Supply support for LT3483IS6#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 needing compact, transformerless negative voltage generation.
FAQ
What is the maximum output voltage achievable with the LT3483IS6#TRMPBF?
The LT3483IS6#TRMPBF supports regulated negative outputs up to –38V, enabled by its internal 40V-rated power switch and integrated Schottky diode. This capability is confirmed in the Absolute Maximum Ratings and Typical Applications sections of the official datasheet, and applies across the full –40°C to 125°C operating temperature range specified for the LT3483IS6#TRMPBF variant.
Does the LT3483IS6#TRMPBF require an external Schottky diode?
No, the LT3483IS6#TRMPBF integrates a 40V Schottky diode internally, eliminating the need for an external diode in standard inverting charge pump configurations. This is explicitly stated in the FEATURES section and verified in the PIN FUNCTIONS and TYPICAL APPLICATION schematics, where D pin connects directly to the internal diode anode.
What is the shutdown current specification for the LT3483IS6#TRMPBF?
The LT3483IS6#TRMPBF draws less than 1µA in shutdown mode, as specified in the ELECTRICAL CHARACTERISTICS table under "Quiescent Current in Shutdown" (VSHDN = GND). This value is guaranteed over the full –40°C to 125°C operating temperature range and is measured with SHDN pin pulled to GND.
Can the LT3483IS6#TRMPBF operate from a 2.5V input supply?
Yes, the LT3483IS6#TRMPBF supports input voltages as low as 2.5V, per the "VIN Operating Range" specification (2.5V to 16V) in the ELECTRICAL CHARACTERISTICS table. This enables direct operation from single-cell Li+ batteries at end-of-discharge, and is validated in the 3.6V-to–8V and 3.6V-to–22V typical application circuits.
What package type and lead count does the LT3483IS6#TRMPBF use?
The LT3483IS6#TRMPBF uses a 6-lead plastic TSOT-23 (S6) package, as confirmed in the ORDER INFORMATION table and PACKAGE DESCRIPTION section. The part marking "LTBKX" corresponds exclusively to this S6 variant, and the pinout diagram explicitly labels pins 1 through 6 with FB, GND, SW, VIN, D, and SHDN.
LT3483IS6#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 ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- TSOT-23-6
LT3483IS6#TRMPBF FAQ
1.How can I place an order for LT3483IS6#TRMPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT3483IS6#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 LT3483IS6#TRMPBF reliable?
The price and inventory of LT3483IS6#TRMPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LT3483IS6#TRMPBF is usually 5 days.
3.What payment methods are accepted for LT3483IS6#TRMPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT3483IS6#TRMPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT3483IS6#TRMPBF?
LT3483IS6#TRMPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT3483IS6#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 LT3483IS6#TRMPBF?
For technical support, including LT3483IS6#TRMPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT3483IS6#TRMPBF requirements.
6.How does Aetrix verify that LT3483IS6#TRMPBF is sourced from the original manufacturer or authorized distributors?
All LT3483IS6#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 LT3483IS6#TRMPBF meets industry standards.
7.What is the process for return or replacement of LT3483IS6#TRMPBF?
All LT3483IS6#TRMPBF units undergo pre-shipment inspection (PSI). If there is an issue with LT3483IS6#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 LT3483IS6#TRMPBF part is unused and in its original packaging.
Return procedure for LT3483IS6#TRMPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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