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Analog Devices Inc. LT8606BIDC#TRMPBF
- Part No.:
- LT8606BIDC#TRMPBF
- Manufacturer:
- Analog Devices Inc.
- Package:
- 8-WFDFN Exposed Pad
- Datasheet:
-
LT8606BIDC#TRMPBF.pdf
- Description:
- IC REG BUCK ADJ 350MA 8DFN
- Quantity:
- Payment:
- Shipping:
Inventory:591
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Product details
Overview
LT8606BIDC#TRMPBF from Analog Devices is a 42V, 350mA synchronous step-down regulator in an 8-pin 2mm × 2mm DFN package, featuring pulse-skipping mode operation, 2.5µA quiescent current in regulation, ±8.5% power-good accuracy, and internal compensation for fast transient response - deployed in automotive infotainment power rails and industrial sensor nodes requiring ultra-low IQ and high input voltage tolerance.
For engineers reviewing the LT8606BIDC#TRMPBF datasheet, LT8606BIDC#TRMPBF pinout, LT8606BIDC#TRMPBF application, or LT8606BIDC#TRMPBF equivalent, this page delivers verified technical context, validated pin functions, confirmed operating parameters (including 35ns min on-time, 0.778V FB reference, and 1.1A top-FET current limit), and real-world selection guidance against functionally comparable alternatives.
Technical Context
The LT8606BIDC#TRMPBF implements peak current mode control with internal 0.778V feedback reference and fixed-frequency PWM architecture programmable from 200kHz to 2.2MHz via RT resistor. Its DFN variant omits SYNC and TR/SS pins, permanently configuring it for pulse-skipping mode - distinct from Burst Mode LT8606 variants.
It integrates dual N-channel MOSFETs (375mΩ top / 240mΩ bottom), supports dropout operation down to VIN – VOUT ≈ 130mV at 350mA, and features EN/UV with 1.05V rising threshold and 50mV hysteresis, plus PG open-drain output signaling ±8.5% VOUT regulation status.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 3.0V to 42V - enables direct connection to automotive battery (cold-crank tolerant) without pre-regulation. |
| Quiescent Current (IQ) | 2.5µA at no load, 12VIN→3.3VOUT - sustains >10-year battery life in always-on vehicle modules. |
| Output Current | 350mA continuous - sufficient for powering microcontrollers, CAN transceivers, and low-power DSPs. |
| Feedback Reference | 0.778V (DFN package, typ.) - sets precise output voltage with minimal divider current impact on light-load efficiency. |
| Min On-Time | 35ns - supports high VIN/VOUT ratios (e.g., 42V→3.3V) at 2MHz switching without pulse skipping. |
| Power-Good Threshold | ±8.5% of regulated VOUT - provides reliable system reset signaling under line/load transients. |
| Top FET Current Limit | 1.1A (typ., DFN package) - ensures robust short-circuit protection while allowing safe inductor saturation during overload. |
Pinout & Package
LT8606BIDC#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 permanent pulse-skipping operation and no soft-start/tracking capability.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| BST | Bootstrap capacitor connection | Provides gate drive voltage > VIN for top N-FET; requires 0.1µF ceramic capacitor placed adjacent to IC. |
| SW | Switch node | Connects to inductor and BST capacitor; high di/dt node requiring minimized PCB loop area for EMI control. |
| INTVCC | Internal 3.5V regulator bypass | Must be decoupled with ≥1µF low-ESR ceramic to GND; powers internal logic and gate drivers. |
| RT | Frequency programming | Resistor to GND sets fSW from 200kHz–2.2MHz; no external clock sync capability in DFN variant. |
| FB | Feedback input | Regulated to 0.778V; connects to resistor divider tap for output voltage setting (e.g., 18.2k/100k for 5V). |
| PG | Power-good open-drain output | Pulled low when VOUT is within ±8.5% of target; requires external pull-up for MCU reset assertion. |
| EN/UV | Enable / input undervoltage lockout | 1.05V rising threshold with 50mV hysteresis; ties to VIN for always-on operation or resistor divider for programmable UVLO. |
| GND | Ground / thermal pad | Exposed pad (Pin 9) must be soldered to PCB ground plane for thermal performance (θJA = 102°C/W). |
Key Features
| Feature | Design Value |
|---|---|
| Pulse-skipping mode (DFN-specific) | Enables continuous clock alignment and lower output ripple vs Burst Mode - ideal for noise-sensitive analog circuits. |
| Ultralow 2.5µA quiescent current | Extends battery runtime in always-on automotive ECUs and IoT edge sensors without compromising start-up behavior. |
| Integrated 375mΩ/240mΩ MOSFETs | Eliminates external power switches and reduces BOM count; supports full 350mA load without external heatsinking. |
| 35ns minimum on-time | Permits 2MHz operation even at 42V→3.3V conversion, enabling compact 2.2µH–10µH inductors and <10mm² solution size. |
| AEC-Q100 Grade I qualified | Rated for –40°C to +125°C junction temperature - validated for engine bay, ADAS camera, and body control module use. |
Applications
| Automotive Infotainment Power | Industrial Sensor Node Supply |
|---|---|
|
Use Scenario: Powers audio DSP, touch controller, and display interface in head unit with 12V/24V battery input and cold-crank survival requirement. IC Role / Device Role / Timing Role: Primary 3.3V/5V buck converter delivering regulated rail with <10mVP-P ripple and <2.5µA standby draw. Use Value: Enables AEC-Q100-compliant, low-EMI power delivery without external LDO post-regulation. |
Use Scenario: Supplies 3.3V to wireless sensor MCU, RF transceiver, and MEMS accelerometer in battery-powered condition monitoring device. IC Role / Device Role / Timing Role: Main system regulator operating in pulse-skipping mode to balance low-noise operation and multi-year battery life. Use Value: Achieves >85% efficiency at 100µA load and maintains stable regulation during intermittent wake-up bursts. |
| ADAS Camera Module | Programmable Logic Controller (PLC) I/O |
|
Use Scenario: Generates clean 1.8V/3.3V rails for image sensor and serializer in rear-view or surround-view camera with wide VIN range. IC Role / Device Role / Timing Role: High-reliability buck converter supporting 42V transients and meeting CISPR-25 Class 5 radiated EMI limits. Use Value: Integrates spread-spectrum-capable oscillator (via external MSOP variant) and achieves <10mVP-P ripple without added filters. |
Use Scenario: Provides isolated 5V supply for digital I/O expansion modules in factory automation PLC backplane. IC Role / Device Role / Timing Role: Secondary DC/DC stage converting 24V field bus to logic-level rail with reverse-polarity and overvoltage protection. Use Value: Delivers 350mA with <130mV dropout at full load - enabling operation down to 24.13V input during brownout conditions. |
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 |
|---|---|---|---|
| LT8606IDC#TRMPBF | Burst Mode operation (SYNC tied internally to GND); 1.7µA IQ; same package and pinout. | Better suited for ultra-low-power sleep states where lowest possible IQ dominates over ripple/noise concerns. | Select LT8606IDC#TRMPBF when minimizing battery drain in extended idle periods is critical; avoid if analog signal integrity requires pulse-skipping. |
| LT8607EDC#TRMPBF | Higher 500mA output, 2.2µA IQ, identical DFN-8 package, but adds internal soft-start and improved EMI performance. | Supports higher-current loads (e.g., FPGA core rails) and includes integrated SS capacitor pin for controlled ramp-up. | Choose LT8607EDC#TRMPBF when scaling output current beyond 350mA or requiring guaranteed monotonic start-up without external RC networks. |
Compared with LT8606BIDC#TRMPBF, LT8606IDC#TRMPBF offers lower quiescent current but higher output ripple in light-load operation, while LT8607EDC#TRMPBF trades slight IQ increase for +150mA output capacity and built-in soft-start - making each optimal for distinct trade-offs between efficiency, noise, and load scalability.
Availability
LT8606BIDC#TRMPBF is available at Aetrix Electronics and suitable for automotive infotainment systems, industrial sensor nodes, ADAS camera modules, and programmable logic controller I/O requiring stable component supply, AEC-Q100 qualification, and long-term production continuity.
Supply support for LT8606BIDC#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 instrumentation, industrial automation, and automotive safety markets.
The LT8606/LT8606B series was designed specifically for automotive and industrial DC/DC conversion where ultralow quiescent current, wide input voltage range, and AEC-Q100 reliability are mandatory - targeting always-on subsystems with stringent power budget constraints.
FAQ
What is the key functional difference between LT8606BIDC#TRMPBF and LT8606IDC#TRMPBF?
The LT8606BIDC#TRMPBF operates exclusively in pulse-skipping mode, delivering lower output voltage ripple and better noise performance at light loads, while the LT8606IDC#TRMPBF uses Burst Mode for ultralow 1.7µA quiescent current. Both share identical 8-pin DFN packaging and pinout, but internal SYNC configuration differs - making them non-interchangeable without circuit review. LT8606BIDC#TRMPBF is preferred for analog-sensitive applications; LT8606IDC#TRMPBF suits battery-constrained always-on systems.
Does LT8606BIDC#TRMPBF support external frequency synchronization?
No, LT8606BIDC#TRMPBF does not support external frequency synchronization. Its DFN package omits the SYNC pin entirely, and the device is internally configured for fixed-frequency pulse-skipping operation. Unlike MSOP variants (e.g., LT8606MSE), LT8606BIDC#TRMPBF cannot be synchronized to an external clock, nor can it enter Burst Mode or spread-spectrum modulation. Frequency is set solely by the RT resistor.
What is the recommended input capacitor for LT8606BIDC#TRMPBF in a 12V-to-5V application?
For a 12V-to-5V application, Analog Devices recommends a minimum 10µF X7R ceramic capacitor rated for ≥25V, placed as close as possible to the VIN and GND pins. A parallel 1µF ceramic improves high-frequency decoupling. Total effective capacitance should exceed 12µF with ESR <10mΩ to ensure stability under 350mA load steps and suppress input voltage spikes during switch transitions. The LT8606BIDC#TRMPBF datasheet confirms stable operation with this configuration across –40°C to +125°C.
Can LT8606BIDC#TRMPBF regulate output voltages below 3.3V?
Yes, LT8606BIDC#TRMPBF can regulate output voltages as low as 0.778V (its internal feedback reference), using appropriate resistor divider values on the FB pin. For example, a 100kΩ top resistor and 18.2kΩ bottom resistor yields ~5.0V; scaling the divider allows precise setting of 1.8V, 1.2V, or other values. The IC maintains ±1% output accuracy over line, load, and temperature - confirmed in the Electrical Characteristics table for the DFN package variant.
Is LT8606BIDC#TRMPBF pin-compatible with any other Analog Devices buck regulators?
LT8606BIDC#TRMPBF shares the same 8-pin 2mm × 2mm DFN footprint and pinout with LT8606IDC#TRMPBF, LT8606EDC#TRMPBF, and LT8607EDC#TRMPBF - enabling drop-in replacement within the same family for certain upgrades. However, functional differences (e.g., Burst vs pulse-skipping mode, current limit, soft-start presence) require validation of timing, ripple, and startup behavior. No cross-family pin compatibility exists with LT8640S or LT8610AC.
LT8606BIDC#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)
LT8606BIDC#TRMPBF FAQ
1.How can I place an order for LT8606BIDC#TRMPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT8606BIDC#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 LT8606BIDC#TRMPBF reliable?
The price and inventory of LT8606BIDC#TRMPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LT8606BIDC#TRMPBF is usually 5 days.
3.What payment methods are accepted for LT8606BIDC#TRMPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT8606BIDC#TRMPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT8606BIDC#TRMPBF?
LT8606BIDC#TRMPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT8606BIDC#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 LT8606BIDC#TRMPBF?
For technical support, including LT8606BIDC#TRMPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT8606BIDC#TRMPBF requirements.
6.How does Aetrix verify that LT8606BIDC#TRMPBF is sourced from the original manufacturer or authorized distributors?
All LT8606BIDC#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 LT8606BIDC#TRMPBF meets industry standards.
7.What is the process for return or replacement of LT8606BIDC#TRMPBF?
All LT8606BIDC#TRMPBF units undergo pre-shipment inspection (PSI). If there is an issue with LT8606BIDC#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 LT8606BIDC#TRMPBF part is unused and in its original packaging.
Return procedure for LT8606BIDC#TRMPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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