LT3517EUF#PBF Analog Devices Integrated Circuit (Quad Flat No-Lead) In Stock
Analog Devices LT3517EUF#PBF is a high-efficiency serial-interface LED display driver supporting 3-segment RGB and single-color LED strings with programmable current control and a compact 16-pin QFN package for portable and backlight applications.
- Manufacturer
- Analog Devices
- Package
- Quad Flat No-Lead
- Pin Count
- 16
- Lifecycle
- ACTIVE
- Datasheet
- LT3517EUF#PBF Datasheet PDF
- Category
- Integrated Circuit
- Price
- From $3.7400(MOQ 1)
- Temp Range
- -40.0°C to 125.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
Key Features
- Serial data interface for single-wire LED current programming, reducing GPIO pin count in microcontroller designs
- Drives 3 independent LED segments with individually programmable current for flexible RGB or multi-channel backlight configurations
- High-efficiency boost or SEPIC topology minimizes power dissipation in portable devices powered from 3.3V or 5V rails
- Compact 16-pin 4mm x 4mm QFN package enabling low-profile LED driver placement near display connectors
Applications
The LT3517EUF#PBF is designed for RGB LED backlights in handheld devices, industrial panel indicators, and wearable displays requiring precise per-channel current matching with minimal host-MCU pin usage. Its serial interface allows daisy-chaining multiple LED driver channels from a single SPI or proprietary serial bus, simplifying firmware and wiring in multi-zone backlight systems. The high-efficiency converter topology keeps the IC cool in battery-powered products where thermal headroom and battery runtime are both constrained.
Specifications
| Pbfree Code | No |
| Manufacturer Package Code | 05-08-1692 |
| YTEOL | 10 |
| Data Input Mode | SERIAL |
| Interface IC Type | LED DISPLAY DRIVER |
| JESD-30 Code | S-PQCC-N16 |
| JESD-609 Code | e3 |
| Multiplexed Display Capability | NO |
| Number of Functions | 1 |
| Number of Segments | 3 |
| Package Body Material | PLASTIC/EPOXY |
| Package Shape | SQUARE |
| Package Style | CHIP CARRIER, HEAT SINK/SLUG, VERY THIN PROFILE |
| Peak Reflow Temperature (Cel) | 260 |
| Qualification Status | Not Qualified |
| Supply Voltage-Max | 30V |
| Supply Voltage-Min | 3V |
| Supply Voltage-Nom | 5V |
| Surface Mount | YES |
| Technology | BIPOLAR |
| Temperature Grade | AUTOMOTIVE |
| Terminal Finish | Matte Tin (Sn) |
| Terminal Form | NO LEAD |
| Terminal Pitch | 0.65mm |
| Terminal Position | QUAD |
| Time@Peak Reflow Temperature-Max (s) | 30 |
| fmax-Min | 2.25MHz |
| ## LT3517EUF#PBF Alternates Showing results | Image |
| Package | Quad Flat No-Lead |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| Moisture Sensitivity Level | MSL 1 |
| ECCN | EAR99 |
| HTS Code | 8542.39.00.01 |
| Country of Origin | Malaysia |
Alternate & Equivalent Parts
No known alternates. Submit an RFQ and our team can suggest alternatives.
Frequently Asked Questions
How does the LT3517EUF#PBF's serial interface reduce pin usage versus discrete PWM-based LED drivers?
The LT3517EUF#PBF uses a serial data interface requiring as few as 1 to 2 host MCU pins to program all 3 LED current channels, compared to 3 separate PWM outputs needed by discrete drivers. In a 3-color RGB backlight driving 20mA per channel, this saves 1 to 2 GPIO lines while still achieving independent brightness control with fine-grained resolution.
What LED forward current can the LT3517EUF#PBF regulate across its 3 output channels?
The LT3517EUF#PBF regulates LED current across all 3 segments with typical full-scale accuracy better than ±3% between channels, ensuring consistent color rendering in RGB backlight applications. Maximum current per channel is set by an external resistor, commonly configured for 20mA to 30mA per LED string in portable display and indicator designs operating from a 3V to 5V supply.
Can the LT3517EUF#PBF drive LED strings whose forward voltage exceeds the input supply voltage?
Yes, the LT3517EUF#PBF integrates a boost converter topology that steps up the input supply, enabling it to drive LED strings with a combined forward voltage higher than VIN. For example, three series white LEDs with a 10.5V forward stack can be driven from a 3.7V lithium battery input, covering the full 3.0V to 4.2V battery discharge range without dropping out.
How does the 16-pin QFN package of the LT3517EUF#PBF affect thermal performance in high-brightness backlight designs?
The 16-pin 4mm x 4mm QFN package includes an exposed thermal pad that must be soldered to a copper pour with at least 4 thermal vias for adequate heat dissipation. At 20mA per LED channel and a 5V input, the device dissipates approximately 50mW to 100mW; without the exposed-pad solder connection, junction temperature can rise 20°C above ambient even at this modest power level, reducing LED color stability.
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About Analog Devices
Analog Devices (ADI) is a global leader in high-performance analog, mixed-signal, and digital signal processing integrated circuits used in virtually all types of electronic equipment.
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| 1+ | $4.2716 | $4.27 |
| 1000+ | $3.7400 | $3740.00 |
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