My Inquiry
My Account
Analog Devices Inc. LT3590EDC#TRMPBF
- Part No.:
- LT3590EDC#TRMPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- LED Drivers
- Package:
- 6-WFDFN Exposed Pad
- Datasheet:
-
LT3590EDC#TRMPBF.pdf
- Description:
- IC LED DRVR RGLTR PWM 80MA 6DFN
- Quantity:
- Payment:
- Shipping:
Inventory:952
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
LT3590EDC#TRMPBF from Analog Devices (formerly Linear Technology) is a fixed-frequency, current-mode buck LED driver IC designed to drive up to 10 white LEDs in series from 4.5V–55V input sources. It integrates an 80mA/55V power switch, internal Schottky diode, and 3.3V LDO regulator, delivering up to 50mA LED current with 91% efficiency and 200mV ±5% feedback voltage accuracy. It targets high-reliability signage applications requiring compact, thermally robust solutions.
For engineers reviewing the LT3590EDC#TRMPBF datasheet, LT3590EDC#TRMPBF pinout, LT3590EDC#TRMPBF application, or LT3590EDC#TRMPBF equivalent, key selection criteria include its 850kHz switching frequency enabling small magnetics, single-pin CTRL-based dimming/shutdown control, 6-lead 2mm × 2mm DFN package with exposed thermal pad, and guaranteed operation from –40°C to +85°C junction temperature.
Technical Context
The LT3590EDC#TRMPBF employs constant-frequency current-mode control with an internal 850kHz oscillator, ensuring stable regulation across wide input (4.5V–55V) and output voltage ranges. Its error amplifier compares VIN–VLED against a programmable reference set by the CTRL pin (0–1.5V), directly scaling LED current from 0 to 50mA via external sense resistor R1.
It features integrated protection including 15μA shutdown quiescent current, 500μA operating quiescent current (no switching), and thermal shutdown. The 3.3V VREG LDO supplies up to 1mA for auxiliary circuitry and remains active during shutdown, while the exposed DFN pad must be soldered to PCB ground for rated thermal performance (θJA = 65°C/W to 85°C/W).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4.5V to 55V - supports industrial 24V/48V rails and wide-input signage systems without pre-regulation. |
| Max LED Current | 50mA - enables uniform brightness across 10-series white LEDs without ballast resistors. |
| Switch Rating | 80mA, 55V - handles peak inductor current and LED string voltage with margin for transients. |
| Feedback Voltage | 200mV ±5% - low-sense voltage minimizes power loss in R1 while maintaining ±2.5mA current accuracy. |
| Switching Frequency | 850kHz (650–1050kHz range) - allows use of sub-5mm inductors (e.g., 470μH) and 1μF ceramic output capacitors. |
| VREG Output | 3.3V ±6% at 1mA - powers microcontrollers or sensors; requires 0.1μF X5R bypass capacitor on VREG pin. |
| CTRL Pin Function | Analog dimming & shutdown - 0–100mV disables switcher; 0–1.5V linearly scales LED current; >1.5V locks full 50mA. |
Pinout & Package
LT3590EDC#TRMPBF uses a 6-lead, 2mm × 2mm plastic DFN package (LTC DWG #05-08-1703) with exposed thermal pad (Pin 7) that must be soldered to PCB ground for thermal performance. Package thickness: 0.75mm max; pin pitch: 0.50mm BSC.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| SW (Pin 1) | Power Switch Drain | Connects to inductor; high dv/dt node - minimize trace area to reduce EMI and ringing. |
| GND (Pins 2, 3, 4) | Ground Return Paths | All three pins must connect directly to local ground plane; critical for thermal dissipation and noise immunity. |
| CTRL (Pin 5) | Dimming & Shutdown Control | 0–100mV = shutdown; 0–1.5V = proportional LED current; >1.5V = full 50mA; bias current <100nA. |
| VREG (Pin 6) | 3.3V Regulated Output | Supplies up to 1mA; requires 0.1μF X5R capacitor to GND; active during shutdown. |
| LED (Pin 7) | LED String Anode Sense | High-side current sense node - connects to top LED anode and R1; sensitive to noise coupling. |
| VIN (Pin 8) | Main Input Supply | 4.5V–55V input; requires local 1μF ceramic bypass capacitor; high-current path. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated Schottky Diode | Eliminates external catch diode - reduces BOM count, board area, and forward drop losses (~0.8V @ 50mA). |
| Single-Pin Dimming/Shutdown | CTRL pin replaces separate enable and dimming inputs - simplifies system-level analog/PWM interface design. |
| Low Quiescent Current | 15μA shutdown current enables battery-backed or energy-sensitive signage systems with long standby life. |
| Thermally Optimized DFN | Exposed pad + multiple GND pins achieve θJA ≤ 85°C/W - supports 50mA continuous operation without heatsink. |
| Stable Discontinuous Mode | Operates cleanly down to 2mA LED current with controlled inductor discharge - enables ultra-low-power dimming. |
Applications
| LED Fixed Signage | Traffic Signs |
|---|---|
Use Scenario: Indoor/outdoor alphanumeric or pictorial signs powered from 24V/48V DC distribution. IC Role / Device Role / Timing Role: Constant-current buck controller regulating 10-series white LEDs at 50mA for consistent luminance and color point. Use Value: Eliminates ballast resistors and external diodes, reducing thermal load and enabling compact 2cm² PCB footprints. |
Use Scenario: Solar-charged or grid-powered road signage with strict reliability and wide-temperature requirements. IC Role / Device Role / Timing Role: Primary LED driver managing 6–10 LED strings under variable input (12V–48V) and ambient temperatures (–40°C to +85°C). Use Value: 850kHz switching ensures minimal EMI in RF-sensitive environments; 15μA shutdown extends battery runtime. |
| Neon Sign Replacement | Architectural Accent Lighting |
Use Scenario: Retrofitting legacy neon tubes with efficient, low-maintenance LED arrays in commercial façades. IC Role / Device Role / Timing Role: High-voltage buck driver powering long LED strings (up to 36V VLED) from 48V bus with analog dimming. Use Value: 55V switch rating accommodates aging LED VF drift; 200mV sense voltage maintains current accuracy over lifetime. |
Use Scenario: Low-profile linear lighting strips in retail or hospitality installations requiring smooth 100:1 dimming. IC Role / Device Role / Timing Role: Single-driver solution for 5–10 LED segments with PWM-compatible CTRL pin for flicker-free dimming. Use Value: Direct PWM dimming support (≥80Hz) preserves LED chromaticity; VREG powers local MCU for smart control. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LED driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LT3474EFE#TRPBF | 36V max input, 1A LED current, TSSOP-16E package; no integrated Schottky; requires external diode. | Better suited for lower-VIN (<36V), higher-current (≥100mA) applications; larger footprint and higher BOM cost. | Select when driving >10 LEDs at >50mA from <36V supply; avoid if space-constrained or seeking lowest component count. |
| LT3517EFE#TRPBF | 30V max input, 1.3A LED current, 4mm × 4mm QFN-16; includes true-color PWM dimming and channel sync. | Targeted at multi-channel RGB or high-current architectural lighting; lacks 48V capability and integrated diode. | Choose for synchronized multi-string designs needing 3000:1 dimming ratio; not viable for 48V signage due to input limit. |
Compared with LT3474EFE#TRPBF and LT3517EFE#TRPBF, the LT3590EDC#TRMPBF uniquely combines 55V input tolerance, integrated Schottky, and 2mm × 2mm DFN packaging - making it optimal for space-limited, high-input-voltage LED signage where BOM reduction and thermal efficiency are critical.
Availability
LT3590EDC#TRMPBF is available at Aetrix Electronics and suitable for LED fixed signage, traffic signs, neon sign replacement, and architectural accent lighting requiring stable component supply, extended temperature operation, and compact thermal management.
Supply support for LT3590EDC#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 its precision analog and power management portfolio. Linear pioneered high-performance LED drivers with integrated power stages and robust thermal design.
The LT3590EDC#TRMPBF belongs to Linear's dedicated LED driver family optimized for high-brightness signage and industrial lighting. It was engineered to replace discrete buck+diode solutions with minimal external components while guaranteeing performance across automotive-grade temperature ranges.
FAQ
What is the maximum number of LEDs the LT3590EDC#TRMPBF can drive?
The LT3590EDC#TRMPBF is specified to drive up to 10 white LEDs in series, assuming typical forward voltage of ~3.2V per LED (32V total) and 48V input. Its 55V absolute maximum input and 55V switch rating allow headroom for VF variation and transient spikes. Driving more than 10 LEDs risks exceeding the switch voltage limit or violating minimum duty cycle constraints.
Does the LT3590EDC#TRMPBF require an external Schottky diode?
No, the LT3590EDC#TRMPBF integrates a Schottky diode internally, eliminating the need for an external catch diode. This is confirmed in the Features list ("Internal Schottky Diode") and Electrical Characteristics table (Schottky Forward Drop = 0.8V @ 50mA). External diode omission reduces board area, component count, and forward conduction losses.
How does the CTRL pin control dimming and shutdown on the LT3590EDC#TRMPBF?
The CTRL pin performs both functions: pulling below 100mV shuts down the switcher (15μA quiescent current); ramping from 0V to 1.5V linearly scales the feedback reference from 0mV to 200mV, thereby controlling LED current from 0 to 50mA. Above 1.5V, the reference clamps at 200mV for full current. This dual functionality is detailed in the PIN FUNCTIONS and OPERATION sections of the datasheet.
What is the purpose of the exposed pad on the LT3590EDC#TRMPBF DFN package?
The exposed pad (Pin 7) on the LT3590EDC#TRMPBF is electrically and thermally connected to GND. It must be soldered to the PCB ground plane to achieve the rated thermal performance (θJA = 65°C/W to 85°C/W). Omitting this connection degrades thermal resistance significantly and may cause thermal shutdown under 50mA continuous load, as stated in the PACKAGE DESCRIPTION and PIN FUNCTIONS sections.
Can the LT3590EDC#TRMPBF operate from a 12V input supply?
Yes, the LT3590EDC#TRMPBF supports input voltages from 4.5V to 55V, including 12V. Typical applications include driving 3–5 white LEDs from 12V (e.g., TA07a circuit). At low input voltages, inductor value should be reduced (e.g., 220μH instead of 470μH) per the Inductor Selection guidelines, and output capacitance increased to 2.2μF for single-LED configurations to maintain stability.
LT3590EDC#TRMPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 6-WFDFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- DC DC Regulator
- Topology:
- Step-Down (Buck)
- Internal Switch(s):
- Yes
- Number of Outputs:
- 1
- Voltage - Supply (Min):
- 4.5V
- Voltage - Supply (Max):
- 55V
- Voltage - Output:
- 55V
- Current - Output / Channel:
- 80mA (Switch)
- Frequency:
- 850kHz
- Dimming:
- PWM
- Applications:
- Signage
- Operating Temperature:
- -40°C ~ 85°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 6-DFN (2x2)
LT3590EDC#TRMPBF FAQ
1.How can I place an order for LT3590EDC#TRMPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT3590EDC#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 LT3590EDC#TRMPBF reliable?
The price and inventory of LT3590EDC#TRMPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LT3590EDC#TRMPBF is usually 5 days.
3.What payment methods are accepted for LT3590EDC#TRMPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT3590EDC#TRMPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT3590EDC#TRMPBF?
LT3590EDC#TRMPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT3590EDC#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 LT3590EDC#TRMPBF?
For technical support, including LT3590EDC#TRMPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT3590EDC#TRMPBF requirements.
6.How does Aetrix verify that LT3590EDC#TRMPBF is sourced from the original manufacturer or authorized distributors?
All LT3590EDC#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 LT3590EDC#TRMPBF meets industry standards.
7.What is the process for return or replacement of LT3590EDC#TRMPBF?
All LT3590EDC#TRMPBF units undergo pre-shipment inspection (PSI). If there is an issue with LT3590EDC#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 LT3590EDC#TRMPBF part is unused and in its original packaging.
Return procedure for LT3590EDC#TRMPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LT3590EDC#TRMPBF Tags
-
BCR402RE6327HTSA1
Infineon Technologies
-
BCR430UXTSA2
Infineon Technologies
-
BCR420UE6433HTMA1
Infineon Technologies
-
BCR420UE6327HTSA1
Infineon Technologies
-
BCR421UE6327HTSA1
Infineon Technologies
-
LYT1604D-TL
Power Integrations
-
HV9910CLG-G
Microchip Technology
-
CL2N8-G
Microchip Technology
-
BCR420UW6-7
Diodes Incorporated
-
BCR421UW6-7
Diodes Incorporated
-
BCR420UFD-7
Diodes Incorporated
-
BCR421UFD-7
Diodes Incorporated
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…
