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Analog Devices Inc. LT8606BEDC#TRPBF
- Part No.:
- LT8606BEDC#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Package:
- 8-WFDFN Exposed Pad
- Datasheet:
-
LT8606BEDC#TRPBF.pdf
- Description:
- IC REG BUCK ADJ 350MA 8DFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,145
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Product details
Overview
LT8606BEDC#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 internal compensation for fast transient response. It delivers regulated 3.3V or 5V output in automotive infotainment power rails where ultra-low standby power and low EMI are critical.
For engineers reviewing the LT8606BEDC#TRPBF datasheet, LT8606BEDC#TRPBF pinout, LT8606BEDC#TRPBF application, or LT8606BEDC#TRPBF equivalent, key selection criteria include its pulse-skipping mode operation (vs. Burst Mode in LT8606EDC), 0.778V feedback reference, ±8.5% power-good threshold, and AEC-Q100 qualification for automotive use.
Technical Context
The LT8606BEDC#TRPBF implements peak current mode control with internal 0.778V reference and fixed-frequency PWM architecture programmable from 200kHz to 2.2MHz via RT resistor. Its pulse-skipping mode-distinct from Burst Mode in non-B variants-maintains continuous oscillator operation and clock-aligned switching, enabling predictable EMI behavior at light loads.
Unlike MSOP versions, this DFN variant omits SYNC and TR/SS pins; the SYNC function is internally floated to enable pulse-skipping by default. It features integrated top/bottom NMOS switches (375mΩ/240mΩ RDS(ON)), 1V EN/UV threshold with 50mV hysteresis, and open-drain PG output signaling ±8.5% VOUT regulation tolerance.
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 (40V). |
| Quiescent Current | 2.5µA in pulse-skipping mode - enables >10-year battery life in always-on vehicle modules. |
| Max Output Current | 350mA continuous - sufficient for powering microcontrollers, sensors, and CAN transceivers. |
| Feedback Reference | 0.778V ±12mV - sets output voltage accuracy; enables 3.3V (R1=18.2kΩ, R2=100kΩ) or 5V (R1=32.4kΩ, R2=100kΩ) with 1% resistors. |
| Switching Frequency | 200kHz to 2.2MHz - selectable via RT resistor; 2MHz operation allows 2.2µH–10µH inductors for compact layout. |
| Min On-Time | 35ns - supports high VIN/VOUT ratios (e.g., 24V→3.3V) without pulse skipping at full frequency. |
| Power-Good Threshold | ±8.5% of VFB - provides reliable system reset signaling with built-in hysteresis and fault detection. |
Pinout & Package
LT8606BEDC#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 the exposed pad to PCB ground for thermal and electrical integrity.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN | Main input supply connection | Accepts 3.0V–42V; must be bypassed locally with ≥1µF ceramic capacitor to GND. |
| BST | Bootstrap supply for high-side switch gate drive | Requires 0.1µF ceramic capacitor between BST and SW; no series resistor allowed. |
| SW | Switch node | Connects to inductor and BST capacitor; must be minimized in PCB area to reduce EMI. |
| INTVCC | Internal 3.5V regulator output | Bypass with ≥1µF low-ESR ceramic to GND; not for external loading. |
| EN/UV | Enable and input undervoltage lockout | 1.05V rising threshold; 50mV hysteresis; tie to VIN if always-on operation required. |
| PG | Open-drain power-good indicator | Pulled low when VOUT is within ±8.5% of target; valid only when VIN > 3.2V and EN/UV high. |
| FB | Feedback input | Regulated to 0.778V; connects to resistor divider from VOUT; add 10pF phase-lead cap for stability with high-value dividers. |
| GND | Power and signal ground | Exposed pad (Pin 9) must be soldered to PCB ground plane for thermal performance and noise immunity. |
Key Features
| Feature | Design Value |
|---|---|
| Pulse-skipping mode (LT8606B variant) | Enables deterministic EMI profile and faster light-load response vs. Burst Mode; IQ ~300µA at no load. |
| AEC-Q100 Grade I qualification | Rated for –40°C to +125°C junction temperature - validated for automotive cabin and engine-bay proximity applications. |
| Low EMI spread-spectrum capability | Not available on DFN; however, inherent pulse-skipping and fast 35ns min-on-time reduce peak spectral energy. |
| Internal compensation | Eliminates external compensation components; supports stable operation with 2.2µH–10µH inductors and 10µF–22µF output capacitors. |
| Robust protection suite | Includes thermal shutdown, overcurrent limiting (1.1A typ), input UVLO, and PG fault reporting - reduces need for external supervision ICs. |
Applications
| Automotive Infotainment Core Rail | ADAS Camera Power Supply |
|---|---|
|
Use Scenario: Powers SoC core voltage (e.g., 1.1V or 1.2V via secondary LDO) in head-unit or digital cluster systems with 12V battery input. IC Role / Device Role / Timing Role: Primary buck converter delivering clean, regulated intermediate rail; operates in pulse-skipping mode during display-off states. Use Value: 2.5µA quiescent current extends battery reserve time during vehicle sleep mode; 35ns min-on-time ensures regulation during cold-crank (6V input). |
Use Scenario: Supplies 3.3V to image sensor and serializer in rear-view or surround-view camera modules. IC Role / Device Role / Timing Role: Point-of-load regulator with fast transient response to handle burst-mode sensor readout current spikes. Use Value: Peak current mode control delivers <50µs recovery from 100mA→350mA load step; ±8.5% PG flag triggers sensor re-initialization on brownout. |
| Telematics Control Unit (TCU) | Automotive Gateway ECU |
|
Use Scenario: Generates 5V rail for cellular modem, GNSS receiver, and CAN FD controller in connected vehicle units. IC Role / Device Role / Timing Role: High-efficiency primary DC/DC stage upstream of LDOs; withstands 40V load-dump transients per ISO 7637-2. Use Value: 42V absolute max input rating and internal 375mΩ/240mΩ FETs eliminate need for external TVS or pre-regulator; reduces BOM count by 2–3 components. |
Use Scenario: Provides isolated 3.3V domain for microcontroller and Ethernet PHY in multi-bus automotive gateways. IC Role / Device Role / Timing Role: Regulator with precise 0.778V reference and tight line/load regulation (<±0.06%/V) for ADC reference stability. Use Value: Feedback voltage accuracy ±12mV ensures <±1.5% output error across temp; enables direct MCU VREF connection without trimming. |
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#TRPBF | Burst Mode operation (1.7µA IQ), no SYNC/TR/SS pins, same DFN package and pinout. | Better for ultra-low-power always-on nodes (e.g., alarm monitoring); higher output ripple (~10mVP-P) at light loads. | Select LT8606EDC#TRPBF when lowest possible standby current is mandatory and deterministic EMI is secondary. |
| LT8607EDC#TRPBF | Higher 500mA output, identical pulse-skipping mode, same 2mm×2mm DFN footprint, but 0.8V FB reference. | Supports higher-current domains (e.g., radar MMIC bias); requires different feedback divider; shares layout compatibility. | Choose LT8607EDC#TRPBF when scaling power delivery beyond 350mA while retaining footprint and control architecture. |
Compared with LT8606EDC#TRPBF, LT8606BEDC#TRPBF trades lower quiescent current for improved light-load EMI predictability and faster transient response; versus LT8607EDC#TRPBF, it offers tighter thermal margin at 350mA with identical board space and simplified feedback design.
Availability
LT8606BEDC#TRPBF is available at Aetrix Electronics and suitable for automotive infotainment, ADAS camera modules, telematics control units, and gateway ECUs requiring stable component supply with AEC-Q100 compliance and long-lifecycle support.
Supply support for LT8606BEDC#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 is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving automotive, industrial, communications, and healthcare markets.
The LT8606/LT8606B product line delivers compact, high-efficiency synchronous buck regulators optimized for automotive environments-designed to meet stringent EMI, thermal, and reliability requirements of modern vehicle electronics.
FAQ
What distinguishes LT8606BEDC#TRPBF from LT8606EDC#TRPBF?
The LT8606BEDC#TRPBF operates in pulse-skipping mode by default (SYNC internally floated), yielding ~300µA no-load IQ and deterministic EMI, whereas LT8606EDC#TRPBF uses Burst Mode (SYNC internally grounded) for 1.7µA IQ but higher output ripple. Both share identical DFN-8 packaging, pinout, and AEC-Q100 Grade I rating, making them drop-in replacements only when mode selection aligns with system requirements.
Does LT8606BEDC#TRPBF support external frequency synchronization?
No. The LT8606BEDC#TRPBF is a DFN-package variant with no SYNC pin; its synchronization functionality is disabled by design. The SYNC pin exists only on MSOP versions (e.g., LT8606EMSE#TRPBF). LT8606BEDC#TRPBF operates exclusively in internally configured pulse-skipping mode with frequency set by the RT resistor.
What is the recommended output capacitor for LT8606BEDC#TRPBF in a 5V/350mA application?
For stable 5V/350mA operation, Analog Devices recommends ≥22µF X7R ceramic output capacitance (e.g., 0805 case, 10V rating) placed close to the FB and GND pins. This value ensures <1% output voltage deviation under full load step and suppresses high-frequency switching noise; adding a 10pF phase-lead capacitor from FB to VOUT improves loop stability with high-value feedback resistors.
How does the EN/UV pin function on LT8606BEDC#TRPBF?
The EN/UV pin on LT8606BEDC#TRPBF provides both enable control and input undervoltage lockout: it activates the regulator when voltage exceeds 1.05V (with 50mV hysteresis) and shuts down the device drawing only 1µA when below 1.00V. An external resistor divider from VIN allows programmable UVLO thresholds-for example, 12V cutoff with R1=1.1MΩ and R2=100kΩ.
Is LT8606BEDC#TRPBF compatible with standard 2mm × 2mm DFN reflow profiles?
Yes. LT8606BEDC#TRPBF is qualified for standard lead-free reflow per J-STD-020, with peak temperature up to 260°C. Its exposed thermal pad (Pin 9) must be fully soldered to a dedicated PCB ground plane using appropriate stencil aperture (typically 70–80% coverage) and solder paste volume to ensure thermal resistance <45°C/W and mechanical reliability in automotive vibration environments.
LT8606BEDC#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 ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-DFN (2x2)
LT8606BEDC#TRPBF FAQ
1.How can I place an order for LT8606BEDC#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT8606BEDC#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 LT8606BEDC#TRPBF reliable?
The price and inventory of LT8606BEDC#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LT8606BEDC#TRPBF is usually 5 days.
3.What payment methods are accepted for LT8606BEDC#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT8606BEDC#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT8606BEDC#TRPBF?
LT8606BEDC#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT8606BEDC#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 LT8606BEDC#TRPBF?
For technical support, including LT8606BEDC#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT8606BEDC#TRPBF requirements.
6.How does Aetrix verify that LT8606BEDC#TRPBF is sourced from the original manufacturer or authorized distributors?
All LT8606BEDC#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 LT8606BEDC#TRPBF meets industry standards.
7.What is the process for return or replacement of LT8606BEDC#TRPBF?
All LT8606BEDC#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LT8606BEDC#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 LT8606BEDC#TRPBF part is unused and in its original packaging.
Return procedure for LT8606BEDC#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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