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Analog Devices Inc. LT8606IDC#TRMPBF
- Part No.:
- LT8606IDC#TRMPBF
- Manufacturer:
- Analog Devices Inc.
- Package:
- 8-WFDFN Exposed Pad
- Datasheet:
-
LT8606IDC#TRMPBF.pdf
- Description:
- IC REG BUCK ADJ 350MA 8DFN
- Quantity:
- Payment:
- Shipping:
Inventory:273
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Product details
Overview
LT8606IDC#TRMPBF from Analog Devices is a 42V, 350mA synchronous step-down regulator in an 8-pin 2mm × 2mm DFN package, featuring 1.7µA non-switching quiescent current, peak current mode control, and internal compensation. It delivers regulated 3.3V or 5V output in automotive and industrial power rails where ultralow IQ and low EMI are critical.
For engineers reviewing the LT8606IDC#TRMPBF datasheet, LT8606IDC#TRMPBF pinout, LT8606IDC#TRMPBF application, or LT8606IDC#TRMPBF equivalent, key selection criteria include its fixed Burst Mode operation (no SYNC pin), 0.778V feedback reference, 35ns minimum on-time, ±8.5% power-good threshold, and AEC-Q100 qualification for automotive use.
Technical Context
The LT8606IDC#TRMPBF implements a constant-frequency peak current mode architecture with internal 0.778V reference and fully integrated top/bottom NMOS power switches (375mΩ/240mΩ). Its Burst Mode operation-hardwired due to absence of SYNC pin-enables <3µA input quiescent current at light loads while maintaining <10mVP-P output ripple.
It features accurate 1V EN/UV threshold with 50mV hysteresis, open-drain PG output signaling VOUT within ±8.5% regulation, and thermal shutdown protection. The DFN package omits TR/SS and SYNC pins, eliminating soft-start programmability and external synchronization-distinguishing it from MSOP variants.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 3.0V to 42V - supports wide-range automotive battery and industrial DC bus inputs without pre-regulation. |
| Max Continuous Output Current | 350mA - sufficient for powering microcontrollers, sensors, and interface ICs in space-constrained systems. |
| Quiescent Current (Burst Mode) | 1.7µA (non-switching), <3µA regulating 12VIN→3.3VOUT - enables >10-year battery life in always-on IoT nodes. |
| Feedback Reference Voltage | 0.778V (DFN package) - sets output voltage via resistor divider; tolerance ±0.02V ensures ≤1% output accuracy with 1% resistors. |
| Minimum Switch-On Time | 35ns - enables high VIN/VOUT ratios (e.g., 42V→3.3V) without pulse-skipping instability. |
| Power-Good Threshold | ±8.5% of VFB - provides reliable system reset signaling with built-in fault detection (e.g., overcurrent, UVLO). |
| Switching Frequency Range | 200kHz to 2.2MHz (RT-programmable) - allows optimization of inductor size vs. efficiency; DFN version defaults to Burst Mode only. |
Pinout & Package
LT8606IDC#TRMPBF uses an 8-pin, 2mm × 2mm plastic DFN package with exposed thermal pad (Pin 9 = GND). The package lacks SYNC and TR/SS pins, confirming fixed Burst Mode operation and no soft-start/tracking capability.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| BST | Bootstrap supply for top NMOS gate drive | Requires 0.1µF ceramic capacitor to SW; enables high-side switch operation above VIN. |
| SW | Switch node connecting internal FETs to inductor | High dv/dt node; must be minimized on PCB to reduce EMI and switching losses. |
| INTVCC | Internal 3.5V regulator output | Bypass with ≥1µF low-ESR ceramic; powers internal logic and drivers; not for external loading. |
| RT | Resistor-to-ground for frequency programming | Set fSW from 200kHz–2.2MHz; no SYNC pin means no spread-spectrum or external sync capability. |
| EN/UV | Enable and input undervoltage lockout input | 1.05V rising threshold with 50mV hysteresis; ties to VIN for always-on operation. |
| VIN | Main input power supply | 42V absolute max; requires local ceramic bypass near pin to minimize input ripple and EMI. |
| PG | Open-drain power-good status output | Pulled low when VOUT is within ±8.5% of target; high-impedance if VIN < 3.2V or EN/UV low. |
| FB | Feedback input for output voltage regulation | Regulated to 0.778V; connects to resistor divider tap; 10pF phase-lead cap recommended for stability. |
| GND | Power and signal ground (exposed pad) | Exposed pad (Pin 9) must be soldered to PCB ground plane for thermal and electrical performance. |
Key Features
| Feature | Design Value |
|---|---|
| Ultralow IQ Burst Mode | 1.7µA non-switching current enables >10-year battery life in always-on automotive telematics and sensor nodes. |
| Integrated Power Switches | 375mΩ top / 240mΩ bottom NMOS eliminate external FETs and gate drivers, reducing BOM count and layout area. |
| AEC-Q100 Qualified | Rated for –40°C to +125°C junction temperature - validated for under-hood automotive applications per stress test requirements. |
| Low-EMI Switching | Fast 35ns min on-time, controlled slew rates, and optimized internal routing reduce radiated emissions without external filters. |
| Robust Protection Suite | Includes thermal shutdown, output overvoltage clamp, and PG-fault reporting - eliminates need for external supervision ICs. |
Applications
| Automotive Infotainment Power Rail | Industrial Sensor Node Supply |
|---|---|
Use Scenario: Powers 3.3V MCU, CAN transceiver, and analog front-end in vehicle cabin modules with cold-crank (4.5V–42V) and stop-start operation. IC Role / Device Role / Timing Role: Primary 42V-input buck converter delivering stable 3.3V at ≤350mA with <3µA quiescent draw during sleep mode. Use Value: Enables compliance with ISO 16750-2 cold-crank requirements and extends battery life during extended parking modes. |
Use Scenario: Supplies 5V to low-power wireless sensor transceivers (LoRaWAN, NB-IoT) in remote industrial monitoring enclosures. IC Role / Device Role / Timing Role: High-efficiency step-down regulator operating from 12–24V DC field buses, supporting intermittent transmit bursts. Use Value: Delivers >92% efficiency at 350mA load and maintains <10mVP-P ripple during RF transmission, minimizing data corruption. |
| Medical Portable Diagnostic Device | Railway Signaling Interface Module |
Use Scenario: Provides isolated 3.3V rail for ARM Cortex-M based patient monitor subsystems powered by rechargeable Li-ion packs. IC Role / Device Role / Timing Role: Main DC/DC converter handling 6–20V battery input range, with PG signaling MCU readiness after startup. Use Value: 0.778V reference and ±8.5% PG window ensure precise ADC reference stability and deterministic boot sequencing. |
Use Scenario: Converts 72V nominal railway traction power to 5V for Ethernet PHYs and FPGA configuration in wayside signaling units. IC Role / Device Role / Timing Role: Input-stage buck regulator surviving 120V transients per EN 50121-3-2, with 35ns min on-time enabling 72V→5V conversion. Use Value: Internal 42V-rated switches and robust UVLO prevent latch-up during line surges, improving system MTBF in harsh rail environments. |
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 (E-grade) instead of I-grade; identical electrical specs. | No automotive qualification; suitable for commercial/industrial use only. | Select LT8606IDC#TRMPBF when AEC-Q100 compliance and extended temperature validation are required. |
| LT8606BIDC#TRMPBF | Same DFN package and I-grade temp range, but internally configured for pulse-skipping (not Burst Mode); higher IQ (~mA range) at light loads. | Lacks ultralow IQ; used where fast transient response at light load outweighs battery life concerns. | Choose LT8606BIDC#TRMPBF only if system demands continuous clock alignment and faster light-load regulation. |
Compared with LT8606EDC#TRMPBF, LT8606IDC#TRMPBF adds AEC-Q100 qualification and tighter production screening; compared with LT8606BIDC#TRMPBF, it trades higher light-load efficiency for reduced EMI and longer battery runtime-making it optimal for automotive always-on subsystems.
Availability
LT8606IDC#TRMPBF is available at Aetrix Electronics and suitable for automotive infotainment, industrial sensor networks, and portable medical devices requiring stable component supply across extended temperature ranges and long product lifecycles.
Supply support for LT8606IDC#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 precision, power, and RF markets since 1965.
The LT8606 series belongs to Analog Devices' Silent Switcher®-adjacent µPower DC/DC portfolio, designed specifically for automotive and industrial applications demanding ultralow quiescent current, high input voltage tolerance, and AEC-Q100 reliability.
FAQ
What is the guaranteed operating temperature range for LT8606IDC#TRMPBF?
The LT8606IDC#TRMPBF is specified for –40°C to +125°C junction temperature and is AEC-Q100 qualified for automotive use. This rating is verified across process corners and lifetime stress testing, ensuring reliability in under-hood and industrial environments where ambient temperatures exceed 85°C.
Does LT8606IDC#TRMPBF support external frequency synchronization?
No, LT8606IDC#TRMPBF does not support external synchronization. It is an 8-pin DFN variant with no SYNC pin; the device operates exclusively in Burst Mode with internal frequency foldback. For sync capability, select the 10-pin MSOP version (e.g., LT8606IMSE#TRPBF).
What is the feedback reference voltage of LT8606IDC#TRMPBF, and how does it affect output accuracy?
The LT8606IDC#TRMPBF has a DFN-package-specific feedback reference voltage of 0.778V (typical), with ±0.02V line regulation and ±0.016V initial accuracy. When paired with 1% resistors in the FB divider, this yields ≤1% total output voltage error across line, load, and temperature - sufficient for powering precision ADCs and PLLs.
How does the absence of TR/SS pin impact startup behavior in LT8606IDC#TRMPBF?
The LT8606IDC#TRMPBF lacks the TR/SS pin, so it has no programmable soft-start or output tracking capability. Startup follows a fixed internal slew rate determined by internal current sources and FB node capacitance, resulting in typical VOUT rise time of ~1–2ms. External soft-start must be implemented via EN/UV ramping if needed.
Can LT8606IDC#TRMPBF be used in 48V automotive systems?
LT8606IDC#TRMPBF supports up to 42V absolute maximum input voltage and is rated for 42V continuous operation. While it cannot directly regulate 48V nominal systems, it can be used downstream of a pre-regulator or in 36V/42V automotive architectures (e.g., 12V/24V/42V dual-battery systems per ISO 21780). Exceeding 42V risks permanent damage.
LT8606IDC#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 ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-DFN (2x2)
LT8606IDC#TRMPBF FAQ
1.How can I place an order for LT8606IDC#TRMPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT8606IDC#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 LT8606IDC#TRMPBF reliable?
The price and inventory of LT8606IDC#TRMPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LT8606IDC#TRMPBF is usually 5 days.
3.What payment methods are accepted for LT8606IDC#TRMPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT8606IDC#TRMPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT8606IDC#TRMPBF?
LT8606IDC#TRMPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT8606IDC#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 LT8606IDC#TRMPBF?
For technical support, including LT8606IDC#TRMPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT8606IDC#TRMPBF requirements.
6.How does Aetrix verify that LT8606IDC#TRMPBF is sourced from the original manufacturer or authorized distributors?
All LT8606IDC#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 LT8606IDC#TRMPBF meets industry standards.
7.What is the process for return or replacement of LT8606IDC#TRMPBF?
All LT8606IDC#TRMPBF units undergo pre-shipment inspection (PSI). If there is an issue with LT8606IDC#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 LT8606IDC#TRMPBF part is unused and in its original packaging.
Return procedure for LT8606IDC#TRMPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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