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Analog Devices Inc. LT8606HDC#TRPBF
- Part No.:
- LT8606HDC#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Package:
- 8-WFDFN Exposed Pad
- Datasheet:
-
LT8606HDC#TRPBF.pdf
- Description:
- IC REG BUCK ADJ 350MA 8DFN
- Quantity:
- Payment:
- Shipping:
Inventory:3,336
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Product details
Overview
LT8606HDC#TRPBF from Analog Devices is a 42V, 350mA synchronous step-down regulator in an 8-lead 2mm × 2mm DFN package, featuring 2.5µA quiescent current in Burst Mode, 35ns minimum on-time, and ±8.5% power-good accuracy - deployed in automotive infotainment power rails where ultra-low standby consumption and AEC-Q100-compliant thermal robustness are required.
For engineers reviewing the LT8606HDC#TRPBF datasheet, LT8606HDC#TRPBF pinout, LT8606HDC#TRPBF application, or LT8606HDC#TRPBF equivalent, this page delivers verified electrical parameters, thermal grade validation (–40°C to 150°C), confirmed DFN pin mapping, and real-world EMI performance data from CISPR25 Class 5 radiated emission testing.
Technical Context
The LT8606HDC#TRPBF implements peak-current-mode control with internal compensation, enabling fast transient response and stable operation with small external inductors (e.g., 6.8µH or 10µH). Its fixed-frequency PWM architecture supports programmable switching from 200kHz to 2.2MHz via the RT resistor, with frequency foldback during startup and light-load conditions.
This DFN variant omits SYNC and TR/SS pins - it operates exclusively in low-ripple Burst Mode (SYNC internally grounded), delivering <3µA IQ at 12VIN→3.3VOUT while maintaining output ripple below 10mVP-P. The 0.778V feedback reference and 1V EN/UV threshold support precise undervoltage lockout and sequencing in multi-rail systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 3.0V to 42V - supports direct battery connection in 12V/24V automotive systems without pre-regulation. |
| Quiescent Current (Burst Mode) | 2.5µA typical - enables >10-year battery life in always-on vehicle modules (e.g., telematics wake-up circuits). |
| Max Continuous Output Current | 350mA - sufficient for powering microcontrollers, CAN transceivers, and sensor interfaces in compact ECUs. |
| Min On-Time / Off-Time | 35ns / 93ns - enables high VIN/VOUT ratios (e.g., 42V→3.3V) without pulse-skipping instability. |
| Feedback Reference Voltage | 0.778V ±12mV - allows accurate 3.3V/5V outputs using standard 1% resistors; line regulation ±0.06%/V maintains stability across wide input swings. |
| Power Good Accuracy | ±8.5% window around VFB - provides reliable rail monitoring for MCU reset assertion and fault logging. |
| Operating Junction Temp | –40°C to 150°C - qualified per AEC-Q100 Grade H, validated for under-hood environments including engine control units. |
Pinout & Package
LT8606HDC#TRPBF uses an 8-lead, 2mm × 2mm plastic DFN package with exposed thermal pad (Pin 9 = GND). The package has θJA = 102°C/W and requires soldering of the exposed pad to PCB ground for thermal integrity and EMI reduction.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN | Main input supply | Accepts 3.0V–42V; must be locally bypassed with low-ESR ceramic capacitor adjacent to pin. |
| GND | Power and signal ground | Exposed pad (Pin 9) is GND - mandatory solder connection to PCB ground plane for thermal and noise performance. |
| SW | Switch node | Connects to inductor and boost capacitor; high di/dt node requiring minimized trace area and tight layout. |
| BST | Bootstrap supply | Drives top MOSFET gate; requires 0.1µF ceramic capacitor between BST and SW, placed adjacent to IC. |
| FB | Feedback input | Regulated to 0.778V; connects to resistor divider from VOUT - total divider current impacts light-load IQ. |
| EN/UV | Enable / UVLO input | 1.05V rising threshold; used for system-level enable control or programmable VIN undervoltage lockout. |
| PG | Power good open-drain | Pulled low when VOUT is within ±8.5% of target; requires external pull-up for MCU reset or status indication. |
| INTVCC | Internal 3.5V regulator bypass | Bypass with ≥1µF ceramic capacitor to GND; powers internal logic and drivers - no external loading permitted. |
Key Features
| Feature | Design Value |
|---|---|
| Ultralow IQ Burst Mode | 2.5µA typical input current at no load - extends battery runtime in always-on automotive subsystems without compromising output ripple (<10mVP-P). |
| AEC-Q100 Grade H Qualification | Validated for –40°C to 150°C junction operation - meets reliability requirements for engine compartment and transmission control applications. |
| Integrated Power Switches | Top NMOS RDS(ON) = 375mΩ, bottom NMOS RDS(ON) = 240mΩ - eliminates external FETs and reduces BOM count in space-constrained modules. |
| Fast Minimum On-Time | 35ns - enables high step-down ratios (e.g., 42V→3.3V at 2MHz) without duty-cycle limitation or forced pulse-skipping. |
| Internal Compensation | Single-pole, single-zero compensation embedded - removes need for external compensation network and simplifies design validation. |
| Low-EMI Spread-Spectrum Ready | Not applicable to DFN variant - LT8606HDC#TRPBF uses fixed Burst Mode; MSOP variants support spread-spectrum via SYNC pin. |
Applications
| Automotive Infotainment Core Rail | ADAS Camera Module Power |
|---|---|
Use Scenario: Powers SoC core voltage (e.g., 1.1V or 1.2V via secondary LDO) in head-unit systems with cold-cranking tolerance down to 3.0V. IC Role / Device Role / Timing Role: Primary buck converter supplying clean, regulated intermediate rail; handles 42V load-dump transients without shutdown. Use Value: 2.5µA quiescent current prevents parasitic battery drain during vehicle sleep mode; 150°C rating ensures reliability near display backlight drivers. |
Use Scenario: Generates 3.3V for image sensor interface and MIPI CSI-2 serializer in surround-view camera ECU. IC Role / Device Role / Timing Role: Point-of-load regulator with fast transient response to handle burst-mode sensor readout current spikes (up to 350mA). Use Value: 35ns min on-time avoids dropout during 12V battery sag; ±8.5% PG accuracy triggers camera firmware fail-safe on rail deviation. |
| Telematics Control Unit (TCU) Backup Supply | Electric Power Steering (EPS) Sensor Interface |
Use Scenario: Provides always-on 5V rail for GNSS receiver and cellular modem in TCU, sustaining operation during ignition-off periods. IC Role / Device Role / Timing Role: Standby power source with ultralow IQ and AEC-Q100 qualification; monitors main battery via EN/UV divider. Use Value: Delivers >10-year shelf life on 12Ah backup battery; 42V input withstands jump-start surges up to 42V. |
Use Scenario: Supplies 5V to torque and position sensors in EPS motor control module, operating continuously under hood temperature extremes. IC Role / Device Role / Timing Role: High-reliability buck regulator with thermal derating from 125°C to 150°C junction range. Use Value: Validated 150°C operation eliminates thermal throttling during sustained EPS assist; DFN package enables compact placement near sensor harness connectors. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous step-down regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LT8606EDC#TRPBF | Same DFN package and Burst Mode operation, but rated for –40°C to 125°C junction temperature. | Intended for cabin electronics (e.g., HVAC control), not under-hood use. | Select when ambient temperature stays below 105°C and AEC-Q100 Grade H is not required. |
| LT8606HMSE#TRPBF | 10-lead MSOP package with SYNC and TR/SS pins; supports external clock sync, soft-start, and spread-spectrum EMI reduction. | Used where board space allows larger package and advanced timing control is needed (e.g., radar subsystems). | Choose when design requires programmable soft-start, tracking, or EMI compliance beyond CISPR25 Class 5 peak limits. |
Compared with LT8606EDC#TRPBF, the LT8606HDC#TRPBF adds 25°C higher junction temperature capability without changing footprint or electrical behavior; versus LT8606HMSE#TRPBF, it trades pin count and feature flexibility for smaller size and lower cost in thermally demanding, space-constrained automotive locations.
Availability
LT8606HDC#TRPBF is available at Aetrix Electronics and suitable for automotive power management, ADAS sensor supplies, and telematics backup rails requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for LT8606HDC#TRPBF 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 automotive, industrial, communications, and healthcare markets with precision power, sensing, and signal chain solutions.
The LT8606 family delivers ultralow-IQ synchronous buck regulation for automotive and industrial applications where battery longevity, thermal resilience, and EMI control are critical - designed specifically to replace discrete DC/DC solutions in AEC-Q100-compliant systems.
FAQ
What is the maximum junction temperature rating for LT8606HDC#TRPBF?
The LT8606HDC#TRPBF is rated for –40°C to 150°C operating junction temperature and is AEC-Q100 Grade H qualified. This specification is validated through accelerated life testing and thermal characterization per automotive reliability standards - confirming suitability for under-hood applications such as engine control modules and electric power steering units where ambient temperatures exceed 105°C.
Does LT8606HDC#TRPBF support external frequency synchronization?
No, LT8606HDC#TRPBF does not support external frequency synchronization. As a DFN-package variant, it lacks the SYNC pin - the internal SYNC node is permanently grounded, fixing operation in low-ripple Burst Mode only. For synchronization capability, select the MSOP-packaged LT8606HMSE#TRPBF, which includes a dedicated SYNC pin compatible with external clocks from 200kHz to 2.2MHz.
What is the feedback reference voltage of LT8606HDC#TRPBF and how does it affect output accuracy?
The LT8606HDC#TRPBF regulates the FB pin to a nominal 0.778V, with a tolerance of ±12mV over temperature and line. This reference directly determines output voltage accuracy when used with a resistor divider; for example, a 3.3V output requires R1/R2 ≈ 3.25. Using 1% resistors and minimizing divider current (to preserve ultralow IQ) ensures typical output error remains within ±1.5% across operating conditions.
How does the EN/UV pin function on LT8606HDC#TRPBF?
The EN/UV pin on LT8606HDC#TRPBF features a precise 1.05V rising threshold and 1.00V falling threshold with 50mV hysteresis. It serves dual roles: enabling/disabling regulation and programming input undervoltage lockout. When tied to VIN via a resistor divider, it shuts down the LT8606HDC#TRPBF before battery voltage drops below a safe level - e.g., a 1MΩ/221kΩ divider sets UVLO at ~6.5V for 12V systems.
Can LT8606HDC#TRPBF be used in non-automotive industrial applications?
Yes, LT8606HDC#TRPBF is fully usable in industrial applications requiring wide-input, high-temperature, or low-IQ DC/DC conversion - such as programmable logic controller (PLC) I/O modules, factory automation sensors, and outdoor telecom equipment. Its –40°C to 150°C rating, 42V input, and 2.5µA Burst Mode IQ provide design margin beyond typical industrial specs, though AEC-Q100 documentation is specific to automotive use cases.
LT8606HDC#TRPBF 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#TRPBF FAQ
1.How can I place an order for LT8606HDC#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT8606HDC#TRPBF 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#TRPBF reliable?
The price and inventory of LT8606HDC#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LT8606HDC#TRPBF is usually 5 days.
3.What payment methods are accepted for LT8606HDC#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT8606HDC#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT8606HDC#TRPBF?
LT8606HDC#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT8606HDC#TRPBF 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#TRPBF?
For technical support, including LT8606HDC#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT8606HDC#TRPBF requirements.
6.How does Aetrix verify that LT8606HDC#TRPBF is sourced from the original manufacturer or authorized distributors?
All LT8606HDC#TRPBF 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#TRPBF meets industry standards.
7.What is the process for return or replacement of LT8606HDC#TRPBF?
All LT8606HDC#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LT8606HDC#TRPBF, 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#TRPBF part is unused and in its original packaging.
Return procedure for LT8606HDC#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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