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Analog Devices Inc. LT8606HDC#TRMPBF
- Part No.:
- LT8606HDC#TRMPBF
- Manufacturer:
- Analog Devices Inc.
- Package:
- 8-WFDFN Exposed Pad
- Datasheet:
-
LT8606HDC#TRMPBF.pdf
- Description:
- IC REG BUCK ADJ 350MA 8DFN
- Quantity:
- Payment:
- Shipping:
Inventory:3,800
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Product details
Overview
LT8606HDC#TRMPBF from Analog Devices is a 42V, 350mA synchronous step-down regulator in an 8-lead 2mm × 2mm DFN package, featuring 1.7µA quiescent current in Burst Mode, 35ns minimum on-time, and ±8.5% power-good accuracy - designed for automotive infotainment power rails requiring ultra-low IQ and high EMI immunity.
For engineers reviewing the LT8606HDC#TRMPBF datasheet, LT8606HDC#TRMPBF pinout, LT8606HDC#TRMPBF application, or LT8606HDC#TRMPBF equivalent, key selection criteria include input voltage range (3.0V–42V), thermal grade (–40°C to 150°C junction), fixed Burst Mode operation (no SYNC pin), and DFN package constraints for layout-sensitive automotive PCBs.
Technical Context
The LT8606HDC#TRMPBF implements peak current mode control with internal compensation, enabling fast transient response and stable operation with small inductors. Its 35ns minimum on-time supports high VIN/VOUT ratios (e.g., 42V→3.3V) without frequency foldback under light load.
Burst Mode operation is hardwired (SYNC pin omitted), delivering <3µA IQ at 12VIN→3.3VOUT while maintaining <10mVP-P output ripple. The device integrates top/bottom NMOS switches (375mΩ/240mΩ), 0.778V feedback reference, and AEC-Q100 qualified thermal performance up to 150°C junction.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 3.0V to 42V - supports wide automotive battery transients including cold-crank (4.5V) and load-dump (42V). |
| Max Output Current | 350mA continuous - sufficient for powering microcontrollers, sensors, and interface ICs in ADAS domains. |
| Quiescent Current | 1.7µA (non-switching), <3µA regulating 12VIN→3.3VOUT - enables always-on systems with >1-year battery life. |
| Feedback Reference | 0.778V ±1.8% - sets output voltage via external resistor divider; low tolerance minimizes output error at light loads. |
| Min On-Time | 35ns - enables high step-down ratios (e.g., 42V→3.3V at 2MHz) without pulse-skipping instability. |
| Power-Good Accuracy | ±8.5% of VOUT - provides reliable system reset signaling for microcontroller brown-out detection. |
| Junction Temp Range | –40°C to 150°C - AEC-Q100 Grade H qualification ensures reliability in engine bay and head-unit environments. |
Pinout & Package
LT8606HDC#TRMPBF uses an 8-lead, 2mm × 2mm plastic DFN package with exposed thermal pad (Pin 9 = GND). The package omits SYNC and TR/SS pins - Burst Mode operation is fixed, and soft-start is internally programmed.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN | Input Power Supply | Accepts 3.0V–42V; requires local 1µF ceramic bypass to exposed GND pad for EMI suppression. |
| GND | Power Ground / Thermal Pad | Exposed pad (Pin 9) must be soldered to PCB ground plane for θJA = 102°C/W thermal performance. |
| SW | Switch Node | Connects to inductor and BST capacitor; critical high-di/dt node requiring minimal loop area for low EMI. |
| BST | Bootstrap Supply | Drives top NMOS gate; requires 0.1µF ceramic capacitor between BST and SW, placed adjacent to IC. |
| INTVCC | Internal 3.5V Regulator Output | Bypass with ≥1µF low-ESR ceramic; supplies internal logic and gate drivers; not for external loading. |
| FB | Feedback Input | Regulated to 0.778V; connects to resistor divider tap; 10pF phase-lead cap recommended with high-R dividers. |
| EN/UV | Enable / Input UVLO | 1.05V rising threshold; used to shut down converter or program VIN undervoltage lockout with external divider. |
| PG | Power-Good Open-Drain | Pulled low when VOUT is within ±8.5% of target; valid only when VIN > 3.2V and EN/UV high. |
Key Features
| Feature | Design Value |
|---|---|
| Ultralow Quiescent Current | 1.7µA non-switching IQ enables >10-year shelf life in battery-backed automotive modules. |
| Fixed Burst Mode Operation | No external SYNC pin required - simplifies layout and eliminates risk of incorrect mode configuration in DFN variant. |
| AEC-Q100 Grade H Qualification | –40°C to 150°C operating junction temperature - certified for under-hood and infotainment applications. |
| 35ns Minimum On-Time | Supports 42V→3.3V conversion at 2MHz without duty-cycle limitation or frequency foldback. |
| Integrated Power Switches | 375mΩ top / 240mΩ bottom NMOS - eliminates external MOSFETs and reduces BOM count by 4 components. |
Applications
| Automotive Infotainment Power | ADAS Camera Module Supply |
|---|---|
|
Use Scenario: Powering SoC core rails (e.g., 1.1V, 1.8V) and DDR memory in head units with strict 3.5µA standby budget. IC Role / Device Role / Timing Role: Primary buck regulator delivering regulated 3.3V/5V from 12V battery; PG signal sequences SoC boot sequence. Use Value: 1.7µA IQ extends vehicle battery life during weeks-long parking; 42V rating survives load-dump events without protection circuitry. |
Use Scenario: Generating clean 3.3V supply for image sensor and ISP in rear-view camera modules mounted near exhaust. IC Role / Device Role / Timing Role: High-efficiency point-of-load converter with thermal shutdown protection at 150°C junction. Use Value: AEC-Q100 Grade H rating ensures operation at 125°C ambient; 35ns min on-time maintains regulation during cold-crank (4.5VIN). |
| Industrial IoT Sensor Node | Telematics Control Unit (TCU) |
|
Use Scenario: Powering LoRaWAN sensor nodes powered by LiSOCl₂ batteries with 10-year field life requirement. IC Role / Device Role / Timing Role: Always-on buck converter stepping 3.6V nominal battery to 3.3V MCU rail; PG monitors brown-out. Use Value: <3µA total IQ at 3.3VOUT enables >12-year battery life; 3.0V min input supports end-of-life battery discharge. |
Use Scenario: Providing isolated 5V rail for CAN FD transceivers and GPS receivers in cellular-connected TCU modules. IC Role / Device Role / Timing Role: Pre-regulator feeding secondary LDOs; Burst Mode suppresses switching noise near RF sections. Use Value: <10mVP-P ripple in Burst Mode prevents CAN bit errors; spread-spectrum EMI reduction unnecessary due to fixed Burst Mode. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar step-down regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LT8606EDC#TRMPBF | Same DFN package and Burst Mode operation, but rated for –40°C to 125°C junction (Grade E). | Not qualified for under-hood or high-ambient zones; suitable for cabin-mounted modules only. | Select LT8606HDC#TRMPBF when operating ambient exceeds 105°C or AEC-Q100 Grade H is mandated. |
| LT8606BIDC#TRMPBF | Same DFN package but operates in pulse-skipping mode (no Burst Mode); higher IQ (~500µA no-load). | Delivers lower output ripple at light loads but sacrifices battery life; lacks ultralow IQ capability. | Choose LT8606BIDC#TRMPBF only if system-level EMI testing fails with Burst Mode artifacts and pulse-skipping is validated. |
Compared with LT8606EDC#TRMPBF, LT8606HDC#TRMPBF adds 25°C higher thermal margin for engine bay deployment; versus LT8606BIDC#TRMPBF, it trades higher light-load efficiency for fixed low-noise Burst Mode behavior - critical for battery longevity in always-on automotive subsystems.
Availability
LT8606HDC#TRMPBF is available at Aetrix Electronics and suitable for automotive infotainment, ADAS camera modules, industrial IoT sensor nodes, and telematics control units requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for LT8606HDC#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 is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving automotive, industrial, communications, and healthcare markets with precision power and signal chain solutions.
The LT8606 family delivers ultralow-quiescent-current synchronous buck regulation for automotive and industrial applications where battery life, thermal robustness, and EMI compliance are critical design constraints.
FAQ
What is the maximum input voltage rating for the LT8606HDC#TRMPBF?
The LT8606HDC#TRMPBF has an absolute maximum input voltage rating of 42V, which allows it to withstand automotive load-dump transients without external protection circuitry. This rating is maintained across its full –40°C to 150°C junction temperature range, making LT8606HDC#TRMPBF suitable for direct connection to 12V and 24V vehicle battery rails.
Does the LT8606HDC#TRMPBF support external frequency synchronization?
No, the LT8606HDC#TRMPBF does not support external frequency synchronization because it uses the DFN package variant that omits the SYNC pin. The device operates exclusively in fixed Burst Mode, with switching frequency set by the RT resistor. For sync-capable operation, the MSOP package (e.g., LT8606HMSE#TRPBF) must be selected instead of LT8606HDC#TRMPBF.
What is the feedback reference voltage of the LT8606HDC#TRMPBF and how precise is it?
The LT8606HDC#TRMPBF regulates the FB pin to a nominal 0.778V reference, with a guaranteed tolerance of ±1.8% over temperature and line conditions. This tight tolerance ensures accurate output voltage setting across automotive temperature extremes, directly impacting system-level power rail stability for sensitive processors and sensors powered by LT8606HDC#TRMPBF.
How does the LT8606HDC#TRMPBF achieve its ultralow quiescent current?
The LT8606HDC#TRMPBF achieves 1.7µA quiescent current by fully disabling internal switching and control circuitry between Burst Mode pulses, reducing dynamic power to near-zero. During sleep periods, only essential bias currents remain active - a design optimized specifically for LT8606HDC#TRMPBF's DFN implementation to meet automotive always-on requirements without compromising start-up time or regulation accuracy.
Is the LT8606HDC#TRMPBF pin-compatible with other variants in the LT8606 family?
No, the LT8606HDC#TRMPBF is not pin-compatible with MSOP-package variants (e.g., LT8606HMSE#TRPBF) due to missing SYNC and TR/SS pins in the DFN layout. However, it shares identical VIN, GND, SW, BST, INTVCC, FB, EN/UV, and PG pin functions with other DFN variants like LT8606EDC#TRMPBF and LT8606BIDC#TRMPBF - enabling drop-in replacement within the same package footprint.
LT8606HDC#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-Down
- Output Configuration:
- Positive
- Topology:
- Buck
- Output Type:
- Adjustable
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 3V
- Voltage - Input (Max):
- 42V
- Voltage - Output (Min/Fixed):
- 1.8V
- Voltage - Output (Max):
- 12V
- Current - Output:
- 350mA
- Frequency - Switching:
- 200kHz ~ 2MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-DFN (2x2)
LT8606HDC#TRMPBF FAQ
1.How can I place an order for LT8606HDC#TRMPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT8606HDC#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 LT8606HDC#TRMPBF reliable?
The price and inventory of LT8606HDC#TRMPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LT8606HDC#TRMPBF is usually 5 days.
3.What payment methods are accepted for LT8606HDC#TRMPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT8606HDC#TRMPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT8606HDC#TRMPBF?
LT8606HDC#TRMPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT8606HDC#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 LT8606HDC#TRMPBF?
For technical support, including LT8606HDC#TRMPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT8606HDC#TRMPBF requirements.
6.How does Aetrix verify that LT8606HDC#TRMPBF is sourced from the original manufacturer or authorized distributors?
All LT8606HDC#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 LT8606HDC#TRMPBF meets industry standards.
7.What is the process for return or replacement of LT8606HDC#TRMPBF?
All LT8606HDC#TRMPBF units undergo pre-shipment inspection (PSI). If there is an issue with LT8606HDC#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 LT8606HDC#TRMPBF part is unused and in its original packaging.
Return procedure for LT8606HDC#TRMPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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