My Inquiry
My Account
Analog Devices Inc. LT3483EDC#TRMPBF
- Part No.:
- LT3483EDC#TRMPBF
- Manufacturer:
- Analog Devices Inc.
- Package:
- 8-WFDFN Exposed Pad
- Datasheet:
-
LT3483EDC#TRMPBF.pdf
- Description:
- IC REG BUCK BOOST ADJ 170MA 8DFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,566
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
LT3483EDC#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 an 8-lead 2mm × 2mm DFN package. Used in OLED bias generation for portable displays.
For engineers reviewing the LT3483EDC#TRMPBF datasheet, LT3483EDC#TRMPBF pinout, LT3483EDC#TRMPBF application, or LT3483EDC#TRMPBF equivalent, key selection criteria include its 200mA switch current limit, –38V output capability, 40µA no-load IQ, and DFN thermal performance with exposed pad grounding.
Technical Context
The LT3483EDC#TRMPBF implements a constant off-time (COT) control architecture with internal 300ns off-time delay and hysteresis-based FB comparator (trip point 0–12mV, 10mV hysteresis). Its switch current limit is trimmed to 170–230mA (typ. 200mA), and it uses a precision 10µA feedback current source enabling single-resistor output programming (R1 = –VOUT / 10µA).
It integrates a 40V/200mA NPN power switch with 200mV VCESAT at 150mA and an internal Schottky diode rated for 350mA forward current and –40V reverse voltage. Shutdown mode draws <1µA, and the device supports both inverting charge pump and flyback topologies without external diodes.
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 without pre-regulation. |
| Output Voltage Range | Up to –38V - enables high-voltage OLED and LCD bias without transformers or external diodes. |
| Switch Current Limit | 200mA (typ.) - sets maximum deliverable load current and short-circuit protection threshold in flyback/charge pump modes. |
| Quiescent Current | 40µA (active), <1µA (shutdown) - extends battery life in always-on portable systems like handheld medical devices. |
| Switch Off-Time | 300ns (fixed) - allows use of sub-10µH inductors and low-profile ceramics, minimizing solution size to ~40mm². |
| Feedback Current | 10µA (precisely trimmed) - eliminates feedback resistor loading error and enables accurate single-resistor VOUT setting. |
| Package | 8-Lead DFN (2mm × 2mm × 0.75mm) with exposed GND pad - provides 88.5°C/W θJA and requires PCB thermal via array for full 125°C operation. |
Pinout & Package
LT3483EDC#TRMPBF is housed in an 8-lead plastic DFN (2mm × 2mm) with exposed thermal pad (Pin 9 = GND). The package supports reflow soldering per JEDEC J-STD-020 and requires solder paste stencil design for the exposed pad.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| FB (Pin 3) | Feedback Input | Connects to output via single resistor R1; 10µA sink current sets VOUT = –10µA × R1; 10mV hysteresis enables stable hysteretic regulation. |
| GND (Pins 2 & 3) | Ground Reference | Pins 2 and 3 must be tied together and connected to low-impedance PCB ground plane; exposed pad (Pin 9) is mandatory GND connection for thermal and EMI performance. |
| SW (Pin 1) | Switch Node | Drives external inductor L1A; carries high di/dt switching current; requires shortest possible trace to minimize ringing and EMI. |
| VIN (Pin 6) | Input Supply | Accepts 2.5–16V; requires ≥1µF local ceramic bypass (4.7µF recommended if >2" from source) to suppress input ripple and supply transients. |
| D (Pin 5) | Integrated Diode Anode | Connects to cathode of flying capacitor (charge pump) or secondary winding (flyback); rated –40V reverse, 350mA forward. |
| SHDN (Pin 4) | Shutdown Control | Logic-level enable: <0.4V = shutdown (<1µA IQ), >1.5V = active; internal pull-down ensures default-off on power-up. |
| NC (Pin 7) | No Internal Connection | Unbonded die pad; must be left floating or grounded per layout best practice - no electrical function. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated 40V Schottky Diode | Eliminates external diode BOM cost and board space; supports –38V output without transformer or discrete rectifier. |
| One-Resistor Feedback | Uses internal 10µA current source to set VOUT = –10µA × R1 - removes feedback divider error, simplifies design, improves accuracy vs. resistive dividers. |
| 300ns Fixed Off-Time Control | Enables stable operation across wide load range without compensation; permits use of 4.7–10µH inductors and 0.1–4.7µF ceramics for ultra-compact layouts. |
| Output Short-Circuit Protection | Proprietary current limiting prevents damage during output fault; maintains safe switch current even at 16V VIN and sustained short. |
| Low 200mV VCESAT Switch | Reduces conduction loss at 150mA load by >30% vs. typical 300–400mV switches - directly improves efficiency in 10–50mA portable loads. |
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 from 3.6V Li+ battery. Use Value: Enables compact, transformerless bias generation with <40mm² footprint and 70%+ efficiency at 8mA load - critical for wearables with strict volume constraints. |
Use Scenario: Supplying –10V to –18V gate drive for STN/TN LCD panels in handheld test equipment. IC Role / Device Role / Timing Role: Micropower inverting regulator operating in flyback configuration with coupled inductor. Use Value: Delivers stable bias with <40µA quiescent current, extending battery runtime beyond 100 hours in low-duty-cycle instruments. |
| Digital Camera CCD Bias | Portable Medical Sensor Bias |
|
Use Scenario: Providing –8V to –12V analog bias for CCD image sensor substrate in compact digital cameras. IC Role / Device Role / Timing Role: Low-noise inverting converter using charge pump topology with 5pF feedback capacitor to suppress ripple. Use Value: Achieves <20mVpp output ripple at 25mA load - preserves CCD dynamic range and SNR without added LDO post-regulation. |
Use Scenario: Generating –5V reference rail for precision analog front-ends in portable ECG monitors. IC Role / Device Role / Timing Role: Shutdown-controlled negative supply activated only during signal acquisition bursts. Use Value: Reduces system standby power by >99% via <1µA shutdown IQ - extends single-AA battery life to >12 months in intermittent-use devices. |
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 |
|---|---|---|---|
| LT3483AEDC#TRMPBF | 400mA switch current limit (vs. 200mA), same package and pinout. | Supports higher output current (e.g., –12V @ 35mA) but requires larger inductor and may increase ripple at light loads. | Select when >25mA continuous negative output current is required; verify thermal margin with 2mm × 2mm DFN layout. |
| LT1617ES6#TRMPBF | 350mA switch, TSOT-23-6 package, 20µA IQ, but no integrated Schottky diode. | Requires external diode and larger solution size; limited to –34V max output due to 36V switch rating. | Choose for ultra-low IQ designs where external diode is acceptable and board area is less constrained than in wearables. |
Compared with LT3483EDC#TRMPBF, LT3483AEDC#TRMPBF doubles output current capability at identical footprint and control scheme, while LT1617ES6#TRMPBF trades integration for lower quiescent current and different package - making LT3483EDC#TRMPBF optimal for space-constrained, transformerless –38V bias where 200mA suffices.
Availability
LT3483EDC#TRMPBF is available at Aetrix Electronics and suitable for OLED bias, portable medical sensors, and handheld instrumentation requiring stable component supply, long-lifecycle support, and RoHS-compliant packaging.
Supply support for LT3483EDC#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 all Linear power products, including rigorous AEC-Q200-aligned reliability testing and extended temperature grade support.
The LT3483 series belongs to Linear's micropower inverting DC/DC converter product line, designed specifically for space- and power-constrained portable electronics needing high-voltage negative rails without magnetic components.
FAQ
What is the maximum negative output voltage achievable with the LT3483EDC#TRMPBF?
The LT3483EDC#TRMPBF supports regulated negative outputs up to –38V, enabled by its 40V-rated internal power switch and integrated Schottky diode. This is achieved in inverting charge pump configuration with appropriate external components - no transformer required. Output voltage is set by a single feedback resistor (R1 = –VOUT / 10µA), and stability is maintained across the full –38V range per datasheet characterization.
Does the LT3483EDC#TRMPBF require an external Schottky diode?
No, the LT3483EDC#TRMPBF integrates a 40V-rated Schottky diode at the D pin, eliminating the need for an external diode in standard inverting charge pump or flyback configurations. This reduces BOM count, PCB area, and assembly cost. The internal diode supports 350mA forward current and –40V reverse blocking, matching the device's –38V output capability.
What is the thermal performance of the LT3483EDC#TRMPBF in its DFN package?
The LT3483EDC#TRMPBF in the 8-lead 2mm × 2mm DFN package has a junction-to-ambient thermal resistance (θJA) of 88.5°C/W when mounted on a standard 4-layer PCB with the exposed pad soldered to a solid ground plane and thermal vias. Full 125°C junction temperature operation requires proper thermal pad layout - the exposed pad (Pin 9) must be connected to GND with ≥4 thermal vias (0.3mm diameter) to inner ground layers.
Can the LT3483EDC#TRMPBF operate from a 2.5V input supply?
Yes, the LT3483EDC#TRMPBF operates across a 2.5V to 16V input range, verified over temperature. At 2.5V VIN, it delivers regulated negative outputs (e.g., –5V, –8V) with >65% efficiency at 10mA load, leveraging its low 200mV VCESAT switch and 40µA quiescent current. Undervoltage lockout activates below 2.0–2.4V to prevent erratic startup.
How does the LT3483EDC#TRMPBF achieve stable regulation with only one feedback resistor?
The LT3483EDC#TRMPBF achieves stable regulation using an internal precision 10µA current source that sinks from the FB pin. Output voltage is set by R1 = –VOUT / 10µA, eliminating resistor-divider ratio errors and loading effects. The FB comparator features 10mV hysteresis and operates with 0–12mV trip voltage, enabling robust hysteretic control without external compensation components.
LT3483EDC#TRMPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 8-WFDFN Exposed Pad
- 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:
- 8-DFN (2x2)
LT3483EDC#TRMPBF FAQ
1.How can I place an order for LT3483EDC#TRMPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT3483EDC#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 LT3483EDC#TRMPBF reliable?
The price and inventory of LT3483EDC#TRMPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LT3483EDC#TRMPBF is usually 5 days.
3.What payment methods are accepted for LT3483EDC#TRMPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT3483EDC#TRMPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT3483EDC#TRMPBF?
LT3483EDC#TRMPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT3483EDC#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 LT3483EDC#TRMPBF?
For technical support, including LT3483EDC#TRMPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT3483EDC#TRMPBF requirements.
6.How does Aetrix verify that LT3483EDC#TRMPBF is sourced from the original manufacturer or authorized distributors?
All LT3483EDC#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 LT3483EDC#TRMPBF meets industry standards.
7.What is the process for return or replacement of LT3483EDC#TRMPBF?
All LT3483EDC#TRMPBF units undergo pre-shipment inspection (PSI). If there is an issue with LT3483EDC#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 LT3483EDC#TRMPBF part is unused and in its original packaging.
Return procedure for LT3483EDC#TRMPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LT3483EDC#TRMPBF Tags
-
TPS562201DDCR
Texas Instruments
-
MC34063ABD-TR
STMicroelectronics
-
TPS561201DDCR
Texas Instruments
-
MC33063ADR
Texas Instruments
-
MC34063ADR
Texas Instruments
-
TPS560200DBVR
Texas Instruments
-
AP3012KTR-G1
Diodes Incorporated
-
TLV61048DBVR
Texas Instruments
-
AZ34063UMTR-G1
Diodes Incorporated
-
TPS562200DDCR
Texas Instruments
-
AP62300TWU-7
Diodes Incorporated
-
MC34063EBD-TR
STMicroelectronics
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
