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Analog Devices Inc. LTM8005EY#PBF
- Part No.:
- LTM8005EY#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- LED Drivers
- Package:
- 80-BGA
- Datasheet:
-
LTM8005EY#PBF.pdf
- Description:
- IC LED DRVR RGLTR PWM 1.6A 80BGA
- Quantity:
- Payment:
- Shipping:
Inventory:2,958
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Product details
Overview
LTM8005EY#PBF from Analog Devices is a 38V input, 38V output boost µModule LED driver IC with integrated 10A/40V power switch, designed for constant-current LED string regulation up to 1.6A. It supports PWM dimming (3000:1 ratio), analog dimming via CTRL1/CTRL2, and operates across 5V–38V input in boost or SEPIC topologies - used in high-brightness automotive lighting and industrial LED signage.
For engineers reviewing the LTM8005EY#PBF datasheet, LTM8005EY#PBF pinout, LTM8005EY#PBF application, or LTM8005EY#PBF equivalent, key selection criteria include its integrated 10A switch, SSFM-enabled EMC performance, open/short LED fault flags, thermally enhanced 9mm × 11.25mm BGA package, and dual-input current reporting (IVINP/IVINN).
Technical Context
The LTM8005EY#PBF implements a fixed-frequency current-mode boost controller with internal N-channel MOSFET (RDS(ON) = 19 mΩ) and integrated sense resistor for LED current regulation. Its transconductance error amplifier (VC pin) drives loop compensation, while SS pin controls soft-start and fault restart timing via external capacitor.
Spread spectrum frequency modulation (SSFM) reduces EMI by modulating switching frequency up to 70% of nominal value, set by RT resistor and RAMP capacitor. The device features ground-referred FB pin for voltage regulation or open-LED detection, and dual CTRL inputs enabling independent analog dimming or thermal foldback.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 5V to 38V - supports wide-range DC supplies including 12V/24V automotive and industrial rails. |
| Output Current | Up to 1.6A regulated LED current - enables driving high-power LED strings without external current sense amplifiers. |
| Internal Switch Rating | 40V VDS, 10A peak - handles boost topology voltage stress (VSW ≈ VOUT + diode drop) up to 38V output. |
| Switching Frequency | 85kHz to 1200kHz - adjustable via RT pin resistor; supports optimized efficiency vs. size trade-offs. |
| Dimming Ratio | 3000:1 true-color PWM - achieved via dedicated PWM pin with internal disconnect MOSFET and fast transient response. |
| Thermal Range | –40°C to 125°C junction - E-grade rating ensures reliability in under-hood and enclosed industrial environments. |
| Package Dimensions | 9mm × 11.25mm × 2.22mm BGA - low-profile over-molded module fits tight board spaces and enables bottom-side routing. |
Pinout & Package
The LTM8005EY#PBF is housed in an 80-pad thermally enhanced Ball Grid Array (BGA) package measuring 9mm × 11.25mm × 2.22mm, with θJB = 7.2°C/W and bottom-side thermal pads optimized for PCB heat sinking.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| GND (K1, K8, etc.) | Power Ground Reference | Primary thermal path and return for high-current loops; must connect to large local ground plane. |
| SW (Bank 2) | Switch Node | Drain of internal 10A MOSFET; connects to inductor in boost/SEPIC; voltage stress ≤ 40V absolute max. |
| DA (Bank 3) | Diode Anode | Connects to boost diode cathode or SEPIC coupling capacitor; completes power path with SW. |
| VOUT (Bank 4) | Output Power Rail | Delivers regulated LED current; requires low-ESR ceramic capacitors tied directly to GND pins. |
| LED (Bank 6) | LED String Anode Output | High-side current source output; integrates open/short LED protection logic via FB monitoring. |
| FB (K2) | Voltage Feedback Input | Regulates to 1.25V nominal; enables constant-voltage mode or triggers OPENLED/SHORTLED faults. |
| PWM (J7) | Brightness Control Input | Active-high signal enabling 3000:1 dimming; internally disconnects LED load during low state. |
| CTRL1 / CTRL2 (K6/K7) | Analog Dimming Inputs | Set LED current from 0.16A to 1.6A linearly; lower voltage dominates; tied to VREF if unused. |
| SS (K4) | Soft-Start & Fault Timer | 28µA pull-up charges external capacitor; fault conditions activate 2.8µA pull-down for hiccup-mode recovery. |
| RT (K5) | Frequency Set Resistor | Resistor to GND sets switching frequency (85–1200kHz); critical for EMI and inductor sizing. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated 10A/40V Power Switch | Eliminates external MOSFET and gate driver, reducing BOM count and layout complexity in boost LED drivers. |
| Spread Spectrum Frequency Modulation (SSFM) | Reduces peak EMI emissions by spreading switching energy across 70% bandwidth - meets CISPR 22 Class B without added shielding. |
| True-Color PWM Dimming (3000:1) | Preserves LED chromaticity at low duty cycles using synchronized internal disconnect MOSFET and fast VC-loop recovery. |
| Open/Short LED Fault Detection | Dual flag pins (OPENLED/SHORTLED) provide latchable, PWM-synchronized status for system-level fault handling and diagnostics. |
| Input & Output Current Reporting | IVINP/IVINN and ISMON pins deliver real-time current sensing without external amplifiers - simplifies power monitoring and safety compliance. |
Applications
| Automotive Headlamp Drivers | Industrial LED Signage |
|---|---|
Use Scenario: High-intensity forward lighting in ADAS-equipped vehicles requiring precise current regulation and EMI compliance. IC Role / Device Role / Timing Role: Constant-current boost controller managing 35V, 1.2A LED strings with PWM dimming synchronized to camera exposure timing. Use Value: Integrated 10A switch and SSFM enable compact, passively cooled headlamp modules meeting ISO 11452-2 radiated immunity requirements. | Use Scenario: Outdoor digital billboards exposed to wide temperature swings and variable input voltage from solar/battery systems. IC Role / Device Role / Timing Role: Wide-input (6–27V) LED driver supporting boost topology with analog dimming for ambient light adaptation. Use Value: –40°C to 125°C operation and open-circuit LED protection ensure uninterrupted display uptime in uncontrolled environments. |
| UV-C Sterilization Modules | Architectural Linear Lighting |
Use Scenario: High-voltage UV-C LED arrays (30–35V) requiring stable current delivery and overtemperature foldback. IC Role / Device Role / Timing Role: Constant-current regulator with CTRL1-based thermal derating and SHORTLED fault shutdown for safety-critical disinfection systems. Use Value: Internal 2.4A overcurrent threshold and 150°C H-grade option prevent LED degradation during sustained high-power operation. | Use Scenario: Long-run architectural lighting with distributed LED strings powered from centralized 24V DC rails. IC Role / Device Role / Timing Role: Distributed boost node converting 24V to 32V @ 0.8A per segment, with ISMON feedback for closed-loop current calibration. Use Value: 9mm × 11.25mm BGA footprint allows dense placement along extrusion channels without compromising thermal management. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LED driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LTM8042EY#PBF | Lower 2.5A switch rating, 12V max output, no SSFM, smaller 6.25mm × 6.25mm BGA | Suitable for low-voltage, medium-current LED strips (<12V, <2A); lacks open/short LED flags | Select when board space is constrained and output voltage ≤12V; not suitable for 38V boost or EMI-sensitive designs. |
| LT3762EFE#PBF | Discrete controller IC (no integrated switch), requires external MOSFET/diode, wider 4.75–60V input, no BGA package | Enables higher output voltages (>38V) and custom thermal design; needs full external power stage | Choose for >38V outputs or when discrete layout control and thermal customization are required; adds BOM and layout complexity. |
Compared with LTM8042EY#PBF, the LTM8005EY#PBF delivers higher output voltage capability and integrated SSFM for stricter EMI environments; versus LT3762EFE#PBF, it trades external component flexibility for faster time-to-market and guaranteed thermal performance in compact form factor.
Availability
LTM8005EY#PBF is available at Aetrix Electronics and suitable for automotive lighting, industrial signage, UV-C sterilization, and architectural LED systems requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for LTM8005EY#PBF 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 is a global leader in high-performance analog, mixed-signal, and power management semiconductors, serving precision instrumentation, industrial automation, and automotive markets.
The LTM8005EY#PBF belongs to the µModule regulator family - engineered for complete, verified power solutions in minimal footprint, targeting space-constrained LED driver and high-reliability DC/DC conversion applications.
FAQ
What is the maximum output voltage supported by the LTM8005EY#PBF?
The LTM8005EY#PBF supports up to 38V output voltage in boost configuration. This limit is defined by the 40V absolute maximum rating of the internal power switch and the FB pin's open-LED detection threshold scaling. Exceeding 38V risks violating the SW pin's 40V absolute maximum rating in boost topology where VSW ≈ VOUT + diode forward drop. For higher outputs, SEPIC or buck-boost topologies may be considered, but require careful voltage stress analysis per the datasheet's "Internal Power Switch Voltage Stress" section.
Does the LTM8005EY#PBF support constant-voltage regulation in addition to constant-current LED driving?
Yes, the LTM8005EY#PBF supports constant-voltage regulation via its FB pin, which regulates to 1.25V nominal. By configuring a resistor divider from VOUT to GND and FB, users can program output voltages such as 12V or 24V. In this mode, the device retains open-LED and short-LED protection functionality - OPENLED asserts if FB exceeds 1.2V with low current, and SHORTLED triggers if FB falls below 0.3V. The LTM8005EY#PBF datasheet provides equations and example circuits for both boost and buck-boost CV configurations.
How does the LTM8005EY#PBF implement PWM dimming with 3000:1 ratio?
The LTM8005EY#PBF achieves 3000:1 true-color PWM dimming using a dedicated PWM input (J7) that controls an internal PMOS disconnect switch. During PWM low state, the switch isolates the LED string from VOUT and idles the oscillator, eliminating residual current and preserving LED color fidelity. The 3000:1 ratio is validated across temperature and input voltage ranges, enabled by fast VC-loop recovery and synchronized fault flag latching. No external FET or timing circuitry is required - the LTM8005EY#PBF handles dimming control, current regulation, and fault response autonomously.
What thermal considerations apply to the LTM8005EY#PBF's BGA package?
The LTM8005EY#PBF uses an 80-pad BGA with θJB = 7.2°C/W and bottom-side thermal vias as primary heat transfer path. Designers must implement ≥6 thermal vias (0.3mm diameter, filled or capped) under the central thermal pad, connected to an internal or backside copper plane ≥250 mm². The θJCBOTTOM = 3.0°C/W rating assumes 1 oz. copper on layer 2; insufficient copper area or missing vias will degrade thermal performance and risk exceeding the 125°C junction limit under 1.6A load. PCB layout guidelines are detailed in the LTM8005EY#PBF datasheet Section 11.
Can the LTM8005EY#PBF be used in SEPIC topology, and what are the key constraints?
Yes, the LTM8005EY#PBF supports SEPIC topology per its pin functions and block diagram. Critical constraints include SW pin voltage stress - in SEPIC, VSW ≈ VIN + VOUT, so combined input/output must stay ≤40V (e.g., 12VIN + 24VOUT). DA pin connects to coupling capacitor negative terminal, and external components (inductor, capacitor, diode) must handle peak currents and ripple. The LTM8005EY#PBF's integrated current sense and fault protection remain fully functional, but OPENLED/SHORTLED thresholds must be recalculated using the SEPIC-specific feedback network in Figure 5 of the datasheet.
LTM8005EY#PBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 80-BGA
- Packaging:
- Tray
- Product Status:
- Obsolete
- Type:
- DC DC Regulator
- Topology:
- Boost, SEPIC
- Internal Switch(s):
- Yes
- Number of Outputs:
- 1
- Voltage - Supply (Min):
- 5V
- Voltage - Supply (Max):
- 38V
- Voltage - Output:
- 38V
- Current - Output / Channel:
- 1.6A
- Frequency:
- 85kHz ~ 1.2MHz
- Dimming:
- PWM
- Applications:
- -
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 80-BGA (11.25x9)
LTM8005EY#PBF FAQ
1.How can I place an order for LTM8005EY#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTM8005EY#PBF 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 LTM8005EY#PBF reliable?
The price and inventory of LTM8005EY#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTM8005EY#PBF is usually 5 days.
3.What payment methods are accepted for LTM8005EY#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTM8005EY#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTM8005EY#PBF?
LTM8005EY#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTM8005EY#PBF 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 LTM8005EY#PBF?
For technical support, including LTM8005EY#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTM8005EY#PBF requirements.
6.How does Aetrix verify that LTM8005EY#PBF is sourced from the original manufacturer or authorized distributors?
All LTM8005EY#PBF 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 LTM8005EY#PBF meets industry standards.
7.What is the process for return or replacement of LTM8005EY#PBF?
All LTM8005EY#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LTM8005EY#PBF, 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 LTM8005EY#PBF part is unused and in its original packaging.
Return procedure for LTM8005EY#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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