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Analog Devices Inc. LTM8005HY#PBF
- Part No.:
- LTM8005HY#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- LED Drivers
- Package:
- 80-BGA
- Datasheet:
-
LTM8005HY#PBF.pdf
- Description:
- IC LED DRVR RGLTR PWM 1.6A 80BGA
- Quantity:
- Payment:
- Shipping:
Inventory:1,649
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Product details
Overview
LTM8005HY#PBF from Analog Devices is a 38V input, 38V output boost µModule LED driver IC with integrated 10A/40V power switch, designed for high-current LED string regulation in industrial and automotive lighting. It delivers up to 1.6A LED current, supports true-color PWM dimming up to 3000:1, and operates across –40°C to 150°C junction temperature.
For engineers reviewing the LTM8005HY#PBF datasheet, LTM8005HY#PBF pinout, LTM8005HY#PBF application, or LTM8005HY#PBF equivalent, key selection considerations include its thermally enhanced 9mm × 11.25mm BGA package, internal spread spectrum modulation for EMI reduction, dual analog dimming (CTRL1/CTRL2), open/short LED fault reporting, and programmable soft-start/fault restart via SS pin.
Technical Context
The LTM8005HY#PBF implements a fixed-frequency current-mode boost controller with integrated N-channel MOSFET (RDS(ON) = 19 mΩ) and synchronous rectifier diode anode (DA). Its ground-referred FB pin enables both constant-current LED regulation and constant-voltage operation with programmable overvoltage/undervoltage thresholds.
It features dual independent current-sense inputs (IVINP/IVINN) for input current limiting, ISMON for real-time LED current reporting (VISMON = ILED/1.6), and dedicated OPENLED/SHORTLED open-drain fault flags with latched behavior synchronized to PWM state. Spread spectrum modulation on RAMP pin reduces peak EMI by spreading switching frequency up to 70% of nominal value.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 5V to 38V - supports wide-range industrial DC supplies and automotive battery transients. |
| Output Current | Up to 1.6A - regulated LED current with ±5% accuracy over temperature and line. |
| Internal Switch Rating | 40V/10A - enables robust boost operation up to 38V output with low conduction loss. |
| Switching Frequency | 85–1200 kHz - adjustable via RT resistor; supports optimization for efficiency vs. size. |
| Junction Temperature | –40°C to 150°C - H-grade qualification ensures reliability in under-hood or high-ambient environments. |
| PWM Dimming Ratio | 3000:1 - true-color dimming without color shift, critical for architectural and display lighting. |
| EMI Reduction | Spread spectrum enabled - lowers peak conducted/radiated emissions by >10 dBµV/m per CISPR 22 tests. |
Pinout & Package
Package: 80-pad thermally enhanced Ball Grid Array (BGA), 11.25mm × 9mm × 2.22mm, RoHS-compliant SAC305 finish, MSL Level 3. Thermal resistance θJB = 7.2°C/W enables high-power operation with bottom-side PCB copper.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| GND (K1, K8, etc.) | Power and signal ground reference | Primary thermal path; must connect to large local ground plane for θJCBOTTOM = 3.0°C/W performance. |
| SW | Switch node | Drain of internal 10A N-MOSFET; connects to inductor in boost topology; voltage stress ≤ VIN + VOUT in SEPIC. |
| DA | Diode anode | Internal synchronous rectifier anode; connects to inductor and SW in boost; enables high-efficiency operation. |
| VOUT | Output power pins | High-current output terminals; connect directly to output capacitor bank for low-impedance filtering. |
| ISN | Current sense return | Connects to internal 0.068Ω sense resistor; voltage ≤ 0.3V above VOUT to avoid sensing error. |
| LED | LED string anode output | Delivers regulated current to LED string; includes internal PMOS disconnect for PWM dimming. |
| FB | Voltage feedback input | Sets constant-voltage output (1.25V nominal); triggers OPENLED if >1.2V with ILED < 160mA. |
| CTRL1 / CTRL2 | Analog dimming threshold | Lower voltage dominates; 0.2V → 0.16A, 0.6V → 0.8A, 1.5V → 1.65A; enables thermal derating or brightness control. |
| PWM | Digital dimming input | Active-high signal; internal 500kΩ pull-down; controls output disconnect and oscillator enable/disable. |
| SS | Soft-start / fault timer | 28µA pull-up to 2.5V; discharges at 2.8µA during faults (overcurrent, short, thermal); requires external capacitor. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated 10A/40V power switch | Eliminates external MOSFET and gate driver; reduces BOM count and layout complexity in high-current LED drivers. |
| True-color PWM dimming (3000:1) | Preserves LED chromaticity across full brightness range-essential for color-critical signage and medical lighting. |
| Programmable input current limit | Uses IVINP/IVINN differential sense; protects upstream supply during inrush or short-circuit events. |
| Open/short LED fault detection | OPENLED and SHORTLED pins provide latched, PWM-synchronized status for system-level fault handling. |
| Spread spectrum frequency modulation | Reduces EMI peak amplitude without requiring external filters-simplifies EMC certification for Class B applications. |
| Thermally enhanced H-grade BGA | Rated for 150°C junction temperature; validated for under-hood automotive and high-ambient industrial use. |
Applications
| Automotive Headlamp Drivers | Industrial High-Bay Lighting |
|---|---|
|
Use Scenario: Driving multi-string white LEDs in adaptive front-lighting systems (AFS) with dynamic beam shaping. IC Role / Device Role / Timing Role: Constant-current LED driver with PWM dimming interface and fault reporting for CAN-based vehicle diagnostics. Use Value: Enables precise 3000:1 dimming without color shift while meeting automotive AEC-Q200 thermal and reliability requirements. |
Use Scenario: Powering 48–72V LED arrays in warehouse and factory high-bay fixtures with 0–10V or DALI control. IC Role / Device Role / Timing Role: Primary boost regulator delivering 1.6A at up to 38V output; integrates current sense and thermal protection. Use Value: Reduces component count versus discrete solutions while maintaining >92% efficiency at full load and supporting 150°C ambient. |
| UV-C Disinfection Systems | Stage & Architectural Lighting |
|
Use Scenario: Driving high-voltage UV-C LED strings (30–35V, 700mA–1.2A) in portable sterilization devices. IC Role / Device Role / Timing Role: Boost converter with open-LED protection and accurate current regulation to ensure consistent germicidal dose. Use Value: Internal 0.068Ω sense resistor and ISMON pin enable real-time current monitoring without external amplifiers. |
Use Scenario: RGBW LED modules requiring independent channel dimming and tight current matching. IC Role / Device Role / Timing Role: Per-channel LED driver with CTRL1/CTRL2 analog dimming and PWM synchronization for color fidelity. Use Value: Dual analog dimming inputs allow simultaneous thermal compensation and brightness scaling across multiple channels. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LED driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LTM8005EY#PBF | H-grade (–40°C to 150°C) vs. E-grade (–40°C to 125°C); identical electrical specs and pinout. | Not suitable for sustained 150°C junction operation; limited to lower ambient or lower power density layouts. | Select LTM8005EY#PBF only when thermal margin allows full derating below 125°C junction. |
| LTM8005IY#PBF | Same H-grade thermal rating but qualified for –40°C to 125°C operation; tighter parametric binning over full temp range. | Designed for industrial automation where extended temperature validation is required but 150°C not needed. | Choose LTM8005IY#PBF when full –40°C to 125°C guaranteed performance is mandatory, and 150°C capability is unnecessary. |
Compared with LTM8005EY#PBF and LTM8005IY#PBF, the LTM8005HY#PBF uniquely guarantees operation up to 150°C junction temperature-critical for compact, sealed, or engine-proximate LED systems where passive cooling is constrained.
Availability
LTM8005HY#PBF is available at Aetrix Electronics and suitable for automotive lighting, industrial high-bay fixtures, UV-C disinfection equipment, and stage lighting systems requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for LTM8005HY#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, Inc. is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving industrial, automotive, communications, and healthcare markets.
The LTM8005HY#PBF belongs to Analog Devices' µModule regulator family-engineered for space-constrained, high-reliability LED driver applications demanding integrated power, protection, and thermal resilience without external FETs or complex loop compensation.
FAQ
What is the maximum LED string voltage supported by the LTM8005HY#PBF?
The LTM8005HY#PBF supports up to 38V output voltage in boost configuration. This is defined by its absolute maximum SW and VOUT pin rating of 40V, with 2V headroom for diode drop and ripple. Operation beyond 38V risks exceeding the 40V absolute max rating and is not supported.
Does the LTM8005HY#PBF require external MOSFETs for boost operation?
No. The LTM8005HY#PBF integrates a 40V/10A N-channel power MOSFET and synchronous rectifier structure. No external switches are needed for standard boost, SEPIC, or buck-boost topologies-only external inductor, output capacitor, and feedback resistors.
How does the LTM8005HY#PBF implement open-LED protection?
The LTM8005HY#PBF monitors FB voltage and LED current simultaneously. If FB exceeds 1.222V (typical) while ISMON indicates ILED < 160mA, the OPENLED pin asserts low. This latched fault remains active until SS discharges below 0.2V, ensuring reliable detection even during PWM dimming cycles.
Can the LTM8005HY#PBF operate in constant-voltage mode?
Yes. By connecting a resistor divider from VOUT to GND with the midpoint to FB, the LTM8005HY#PBF regulates output voltage to 1.25V × (1 + R1/R2). In this mode, it retains OPENLED/SHORTLED fault detection based on FB thresholds and current reporting via ISMON.
What thermal performance can be expected from the LTM8005HY#PBF in a typical 4-layer PCB layout?
With 4-layer board, 2oz copper, and ≥4 cm² thermal pad connected to internal ground plane, the LTM8005HY#PBF achieves θJB ≈ 7.2°C/W. At 1.6A/35V output (56W), junction rise is ~400°C/W × 56W = 224°C above ambient-so 25°C ambient yields ~249°C junction, exceeding rating. Derating to ≤1.2A or adding heatsink is required for continuous 150°C ambient operation.
LTM8005HY#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:
- Step-Up (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:
- Analog, PWM
- Applications:
- -
- Operating Temperature:
- -40°C ~ 150°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 80-BGA (11.25x9)
LTM8005HY#PBF FAQ
1.How can I place an order for LTM8005HY#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTM8005HY#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 LTM8005HY#PBF reliable?
The price and inventory of LTM8005HY#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTM8005HY#PBF is usually 5 days.
3.What payment methods are accepted for LTM8005HY#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTM8005HY#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTM8005HY#PBF?
LTM8005HY#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTM8005HY#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 LTM8005HY#PBF?
For technical support, including LTM8005HY#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTM8005HY#PBF requirements.
6.How does Aetrix verify that LTM8005HY#PBF is sourced from the original manufacturer or authorized distributors?
All LTM8005HY#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 LTM8005HY#PBF meets industry standards.
7.What is the process for return or replacement of LTM8005HY#PBF?
All LTM8005HY#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LTM8005HY#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 LTM8005HY#PBF part is unused and in its original packaging.
Return procedure for LTM8005HY#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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