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Analog Devices Inc. LT8606BIDC#TRPBF
- Part No.:
- LT8606BIDC#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Package:
- 8-WFDFN Exposed Pad
- Datasheet:
-
LT8606BIDC#TRPBF.pdf
- Description:
- IC REG BUCK ADJ 350MA 8DFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,403
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Product details
Overview
LT8606BIDC#TRPBF from Analog Devices is a 42V, 350mA synchronous step-down regulator in an 8-pin 2mm × 2mm DFN package, featuring pulse-skipping mode, 2.5µA quiescent current in regulation, 0.778V feedback reference, and ±8.5% power-good accuracy - deployed in automotive infotainment power rails requiring ultra-low IQ and high input voltage tolerance.
For engineers reviewing the LT8606BIDC#TRPBF datasheet, LT8606BIDC#TRPBF pinout, LT8606BIDC#TRPBF application, or LT8606BIDC#TRPBF equivalent, key selection criteria include confirmed pulse-skipping operation (no SYNC pin), 35ns minimum on-time, 200kHz–2.2MHz programmable frequency via RT resistor, and AEC-Q100 qualification for automotive ambient temperature range (–40°C to 125°C).
Technical Context
The LT8606BIDC#TRPBF implements peak current mode control with internal compensation, enabling fast transient response and stable loop behavior using small external inductors. Its fixed-frequency PWM architecture supports RT-programmable switching (200kHz–2.2MHz) and operates exclusively in pulse-skipping mode due to internal floating of the SYNC node - distinguishing it from the Burst Mode–only LT8606 DFN variant.
It integrates dual N-channel MOSFETs (375mΩ top / 240mΩ bottom), delivers 350mA continuous output, and features accurate 1V EN/UV threshold with 50mV hysteresis, PG open-drain signaling at ±8.5% VFB, and thermal shutdown protection. The DFN package omits TR/SS and SYNC pins, eliminating soft-start tracking and external synchronization capability.
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 at 12VIN → 3.3VOUT - enables always-on systems with multi-year battery life in low-power modes. |
| Output Current | 350mA continuous - sufficient for powering microcontrollers, sensors, and interface ICs in compact modules. |
| Feedback Reference | 0.778V (DFN variant) - sets output voltage accuracy; requires 1% resistors for ≤1% VOUT error. |
| Switching Frequency | 200kHz to 2.2MHz (RT-programmable) - allows trade-off between EMI, inductor size, and efficiency. |
| Min On-Time | 35ns - enables high VIN/VOUT ratios (e.g., 42V→3.3V) without pulse skipping at light loads. |
| Power-Good Accuracy | ±8.5% of VFB - provides reliable system reset and sequencing control for downstream logic. |
Pinout & Package
LT8606BIDC#TRPBF 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 pulse-skipping operation and no soft-start/tracking capability.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| BST | Bootstrap supply for high-side gate driver | Requires 0.1µF ceramic capacitor to SW; enables efficient 42V operation with integrated high-side FET. |
| SW | Switch node | Connects to inductor and BST capacitor; critical for EMI layout - must be minimized in area and length. |
| 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 input | Resistor to GND sets fSW; 18.2kΩ yields ~2MHz - enables compact magnetics and EMI filtering. |
| EN/UV | Enable and input undervoltage lockout | 1.05V rising threshold with 50mV hysteresis - allows precise VIN brownout detection or shutdown control. |
| VIN | Main input supply | Supplies internal circuitry and high-side switch; requires local high-frequency input capacitor. |
| PG | Open-drain power-good indicator | Pulled low when VOUT is within ±8.5% of target; used for system sequencing and fault monitoring. |
| FB | Feedback input | Regulated to 0.778V; connects to resistor divider - determines output voltage with minimal divider current. |
Key Features
| Feature | Design Value |
|---|---|
| Pulse-skipping operation (no SYNC pin) | Guarantees continuous clock alignment and predictable EMI spectrum - unlike Burst Mode variants. |
| AEC-Q100 qualified (Grade I) | Validated for automotive applications across –40°C to +125°C junction temperature range. |
| 35ns minimum on-time | Enables high step-down ratios (e.g., 42V→3.3V) without cycle skipping at full load - improves regulation stability. |
| Integrated 375mΩ/240mΩ MOSFETs | Eliminates external power switches; reduces BOM count and PCB footprint while maintaining >92% efficiency at 350mA. |
| Internal compensation | Removes need for external compensation network - simplifies design and improves production consistency. |
Applications
| Automotive Infotainment Core Rail | Industrial Sensor Node Power |
|---|---|
|
Use Scenario: Powers ARM Cortex-M7 MCU and CAN transceiver in head-unit module with 12V battery input and strict 2.5µA sleep current budget. IC Role / Device Role: Primary 3.3V buck converter delivering regulated core voltage with AEC-Q100 reliability and thermal robustness. Use Value: Enables 10+ year battery-backed operation in always-listening voice interfaces by minimizing no-load IQ. |
Use Scenario: Supplies 5V to isolated RS-485 transceiver and MEMS pressure sensor in hazardous-area field transmitter. IC Role / Device Role: Input-tolerant step-down regulator handling 24V industrial bus with surge immunity up to 42V. Use Value: Eliminates need for upstream TVS/clamp stages due to 42V absolute max rating and robust internal FETs. |
| Medical Portable Diagnostic Display | Telematics Control Unit (TCU) Backup Rail |
|
Use Scenario: Generates 3.3V for OLED display controller in battery-powered ultrasound probe with stringent EMI limits. IC Role / Device Role: Low-noise, spread-spectrum-capable (via external sync source) DC/DC stage meeting CISPR-25 Class 5 radiated emissions. Use Value: Achieves <−40dBµV radiated EMI at 100MHz with integrated switching and optimized layout - no added filter required. |
Use Scenario: Provides 5V backup rail for real-time clock and nonvolatile memory during main power loss in vehicle telematics unit. IC Role / Device Role: Always-on secondary regulator powered from supercapacitor bank charged from 12V system. Use Value: Maintains 3.3V/5V outputs for >72 hours after ignition-off using 2.5µA IQ and low dropout operation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar step-down regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LT8606IDC#TRPBF | Burst Mode only (SYNC internally grounded); 1.7µA IQ vs 2.5µA; same package and pinout. | Better suited for ultra-low-power wake-on-event systems where lowest possible IQ dominates over EMI predictability. | Select LT8606IDC#TRPBF if Burst Mode's lower IQ is critical and pulse-skipping EMI profile is not required. |
| LT8640SIDD#TRPBF | Higher 4A output, 3.4µA IQ, 42V rating, same DFN-8 package but different pinout (no PG, added THERM). | Targets higher-current subsystems (e.g., ADAS camera modules); lacks PG pin and has different thermal reporting. | Choose LT8640SIDD#TRPBF only when >350mA output is needed - not a drop-in replacement due to pinout and feature mismatch. |
Compared with LT8606IDC#TRPBF, the LT8606BIDC#TRPBF trades 0.8µA higher quiescent current for deterministic pulse-skipping timing and improved EMI repeatability; versus LT8640SIDD#TRPBF, it offers tighter VFB accuracy (0.778V vs 0.8V) and integrated PG signaling at lower current capability.
Availability
LT8606BIDC#TRPBF is available at Aetrix Electronics and suitable for automotive infotainment, industrial sensor nodes, portable medical displays, and telematics control units requiring stable component supply, AEC-Q100 compliance, and long-term lifecycle support.
Supply support for LT8606BIDC#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 precision, industrial, automotive, and communications markets.
The LT8606/LT8606B product line delivers ultralow-IQ, high-input-voltage synchronous buck regulators optimized for automotive and industrial applications demanding reliability, small solution size, and robust transient performance.
FAQ
What is the key functional difference between LT8606BIDC#TRPBF and LT8606IDC#TRPBF?
The LT8606BIDC#TRPBF operates exclusively in pulse-skipping mode due to its internally floated SYNC node, while the LT8606IDC#TRPBF operates in Burst Mode with SYNC tied low. This results in higher light-load quiescent current (2.5µA vs 1.7µA) but more predictable EMI and faster transient recovery for the LT8606BIDC#TRPBF. Both share identical pinout, package, and AEC-Q100 Grade I qualification.
Does LT8606BIDC#TRPBF support external synchronization or spread-spectrum modulation?
No. The LT8606BIDC#TRPBF has no SYNC pin - it is permanently configured for pulse-skipping operation with fixed internal oscillator control. Spread-spectrum modulation requires an external clock applied to SYNC, which is absent in this DFN variant. For spread-spectrum capability, select the MSOP version (e.g., LT8606BMSE#TRPBF) instead of LT8606BIDC#TRPBF.
What is the guaranteed operating temperature range for LT8606BIDC#TRPBF?
The LT8606BIDC#TRPBF is rated for –40°C to +125°C junction temperature and is AEC-Q100 qualified for automotive applications (Grade I). This specification is validated per Analog Devices' automotive reliability testing protocol and applies across the full electrical performance envelope - including 350mA output current and 42V input capability.
Can LT8606BIDC#TRPBF be used in a 48V battery system?
No. The absolute maximum input voltage for LT8606BIDC#TRPBF is 42V, as specified in the Absolute Maximum Ratings table. Applying 48V exceeds this limit and risks permanent device damage. For 48V systems, consider higher-voltage alternatives such as the LT8640S or LT8645S families, which support up to 65V input - not LT8606BIDC#TRPBF.
Is the feedback reference voltage of LT8606BIDC#TRPBF adjustable, and what is its tolerance?
Yes - the LT8606BIDC#TRPBF regulates the FB pin to a nominal 0.778V, with a guaranteed tolerance of ±1.6% (0.762V to 0.798V) over temperature and load. Output voltage is set using an external resistor divider; 1% tolerance resistors are recommended to maintain overall VOUT accuracy within ±2%.
LT8606BIDC#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)
LT8606BIDC#TRPBF FAQ
1.How can I place an order for LT8606BIDC#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT8606BIDC#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 LT8606BIDC#TRPBF reliable?
The price and inventory of LT8606BIDC#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LT8606BIDC#TRPBF is usually 5 days.
3.What payment methods are accepted for LT8606BIDC#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT8606BIDC#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT8606BIDC#TRPBF?
LT8606BIDC#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT8606BIDC#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 LT8606BIDC#TRPBF?
For technical support, including LT8606BIDC#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT8606BIDC#TRPBF requirements.
6.How does Aetrix verify that LT8606BIDC#TRPBF is sourced from the original manufacturer or authorized distributors?
All LT8606BIDC#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 LT8606BIDC#TRPBF meets industry standards.
7.What is the process for return or replacement of LT8606BIDC#TRPBF?
All LT8606BIDC#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LT8606BIDC#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 LT8606BIDC#TRPBF part is unused and in its original packaging.
Return procedure for LT8606BIDC#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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