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Analog Devices Inc. LT8606EDC#TRMPBF
- Part No.:
- LT8606EDC#TRMPBF
- Manufacturer:
- Analog Devices Inc.
- Package:
- 8-WFDFN Exposed Pad
- Datasheet:
-
LT8606EDC#TRMPBF.pdf
- Description:
- IC REG BUCK ADJ 350MA 8DFN
- Quantity:
- Payment:
- Shipping:
Inventory:5,500
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Product details
Overview
LT8606EDC#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 for automotive infotainment power rails, industrial sensors, and always-on IoT nodes requiring ultralow IQ.
For engineers reviewing the LT8606EDC#TRMPBF datasheet, LT8606EDC#TRMPBF pinout, LT8606EDC#TRMPBF application, or LT8606EDC#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 LT8606EDC#TRMPBF implements a constant-frequency peak current mode architecture with internal 0.778V reference and fully integrated top/bottom NMOS switches (375mΩ/240mΩ RDS(ON)). Its DFN variant permanently ties SYNC to ground, enforcing low-ripple Burst Mode operation - no external clock synchronization or spread-spectrum modulation is supported.
Operation relies on RT-resistor–programmed switching frequency (200kHz–2.2MHz), EN/UV pin with 1.05V rising threshold and 50mV hysteresis, and PG open-drain output signaling VOUT within ±8.5% regulation or fault conditions. Thermal shutdown and VIN UVLO protect under overload or input brownout.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 3.0V to 42V - supports wide automotive battery transients and industrial 24V/36V rails without external pre-regulation. |
| Quiescent Current (Burst Mode) | 1.7µA (non-switching) - enables >10-year battery life in always-on sensor nodes at 3.3V/100µA load. |
| Max Continuous Output Current | 350mA - sufficient for powering microcontrollers, CAN transceivers, and low-power DSPs directly. |
| Feedback Reference Voltage | 0.778V (DFN package) - sets output voltage via resistor divider; 1% resistors recommended for ±1% VOUT accuracy. |
| Minimum 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 when output deviates beyond regulation window. |
| Operating Junction Temp | –40°C to 125°C - qualified per AEC-Q100 Grade E for under-hood and dashboard electronics. |
Pinout & Package
LT8606EDC#TRMPBF uses an 8-pin, 2mm × 2mm plastic DFN package with exposed thermal pad (Pin 9 = GND). The package omits SYNC and TR/SS pins - Burst Mode operation is fixed and soft-start is internally controlled.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| BST | Bootstrap supply | Drives top NMOS gate above VIN; requires 0.1µF ceramic capacitor placed adjacent to IC. |
| SW | Switch node | Connects to inductor and BST capacitor; must be minimized on PCB to reduce EMI and switching losses. |
| INTVCC | Internal 3.5V regulator bypass | Bypassed with ≥1µF low-ESR ceramic; powers internal logic/drivers; not for external loading. |
| RT | Frequency programming | Resistor to GND sets fSW from 200kHz to 2.2MHz; no SYNC pin means no external sync or spread spectrum. |
| EN/UV | Enable / input undervoltage lockout | 1.05V rising threshold with 50mV hysteresis; tie to VIN for always-on, or use resistor divider for programmable UVLO. |
| PG | Power-good indicator | Open-drain output pulled low when VOUT is within ±8.5% of target or during fault; valid only if VIN > 3.2V and EN/UV high. |
| FB | Feedback input | Regulated to 0.778V; connects to resistor divider tap; 10pF phase-lead cap recommended with high-value dividers. |
| GND | Ground / thermal pad | Exposed pad (Pin 9) must be soldered to PCB copper for thermal performance (θJA = 102°C/W). |
Key Features
| Feature | Design Value |
|---|---|
| Ultralow IQ Burst Mode | 1.7µA non-switching current enables >10-year coin-cell operation in wake-on-event sensor systems. |
| Fixed Burst Mode Architecture | No SYNC pin - eliminates layout complexity and ensures deterministic low-EMI light-load behavior without external clock routing. |
| Integrated Power Switches | 375mΩ top / 240mΩ bottom NMOS enable high efficiency (92% @ 350mA, 12V→5V) without external FETs or drivers. |
| AEC-Q100 Qualified | Grade E (–40°C to +125°C) qualification confirms reliability for automotive body electronics and ADAS subsystems. |
| Robust Protection Suite | Includes thermal shutdown, VIN UVLO, PG fault reporting, and cycle-by-cycle current limiting up to 1.4A (DFN). |
Applications
| Automotive Infotainment Power | Industrial Sensor Node Supply |
|---|---|
Use Scenario: Powering USB-C PD controllers and display backlight drivers in vehicle head units with 12V/24V battery input. IC Role / Device Role / Timing Role: Primary 5V/3.3V buck converter delivering stable rail under cold-crank (4.5V) and load-dump (42V) conditions. Use Value: 35ns min-on-time prevents dropout during high VIN/VOUT ratio transients; ±8.5% PG ensures safe MCU reset sequencing. |
Use Scenario: Providing regulated 3.3V supply to wireless temperature/humidity sensors deployed in factory automation networks. IC Role / Device Role / Timing Role: Always-on power management IC enabling multi-year battery life via 1.7µA quiescent current in Burst Mode. Use Value: Internal compensation and peak current mode deliver fast transient response to RF transmit bursts without external loop tuning. |
| Medical Wearable Battery Rail | Smart Building Controller Core Supply |
Use Scenario: Generating clean 3.3V for ultra-low-power BLE SoCs and analog front-ends in FDA-cleared wearable monitors. IC Role / Device Role / Timing Role: High-efficiency, low-noise DC/DC converter meeting CISPR25 Class 5 radiated EMI limits without added filtering. Use Value: Fixed Burst Mode minimizes output ripple (<10mVP-P) while maintaining <3µA total input current at no load - critical for signal integrity. |
Use Scenario: Powering ARM Cortex-M7-based building automation controllers operating from 24V PoE or industrial SMPS rails. IC Role / Device Role / Timing Role: Compact, thermally robust point-of-load regulator supporting 350mA peak CPU core current with minimal board area. Use Value: 2mm × 2mm DFN with exposed pad achieves 102°C/W θJA, enabling full 350mA output in confined enclosures without heatsinks. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar step-down regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LT8606IMSE#TRPBF | 10-lead MSOP package with SYNC and TR/SS pins; supports external clock sync, spread spectrum, and programmable soft-start. | Required where EMI reduction via frequency dithering or precise power sequencing is needed - e.g., radar modules or audio amplifiers. | Select when design flexibility (sync, tracking, burst/pulse-skip selection) outweighs size and cost constraints. |
| LT8606BEDC#TRMPBF | Same DFN-8 package but LT8606B variant - operates in pulse-skipping mode (not Burst Mode); higher IQ (~500µA no-load). | Suitable for applications needing faster light-load transient response and continuous clock alignment - e.g., real-time motor control feedback loops. | Choose only if Burst Mode's 1.7µA IQ is unnecessary and deterministic pulse-skipping timing is preferred over ultralow IQ. |
Compared with LT8606EDC#TRMPBF, the MSOP variant adds system-level control at the cost of larger footprint and BOM complexity, while the LT8606B DFN trades ultralow IQ for improved light-load regulation speed - neither is pin-compatible, and both require PCB redesign.
Availability
LT8606EDC#TRMPBF is available at Aetrix Electronics and suitable for automotive infotainment, industrial sensor nodes, and medical wearables requiring stable component supply, AEC-Q100 compliance, and long-term production continuity.
Supply support for LT8606EDC#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 automotive, industrial, communications, and healthcare markets.
The LT8606 series belongs to Analog Devices' Power by Linear™ portfolio, designed specifically for space-constrained, high-input-voltage, ultralow-quiescent-current DC/DC conversion in automotive and industrial environments.
FAQ
What is the quiescent current of LT8606EDC#TRMPBF in Burst Mode operation?
The LT8606EDC#TRMPBF draws 1.7µA of non-switching quiescent current when regulating with no load in Burst Mode. In typical applications with feedback divider loading, total input current remains below 3.0µA - enabling decade-long battery life in always-on sensor designs. This value is measured at TA = 25°C with VIN ≤ 36V and VEN/UV = 2V.
Does LT8606EDC#TRMPBF support external clock synchronization?
No, LT8606EDC#TRMPBF does not support external clock synchronization. As a DFN-package variant, it lacks the SYNC pin - the internal SYNC node is permanently tied to ground, fixing operation in low-ripple Burst Mode only. For sync capability, select the MSOP-packaged LT8606EMSE#TRPBF instead.
What is the feedback reference voltage for LT8606EDC#TRMPBF?
The LT8606EDC#TRMPBF has a nominal feedback reference voltage of 0.778V, with guaranteed range of 0.771V to 0.785V over temperature. This value is used to calculate R1/R2 resistor values for output voltage programming: R1 = R2 × (VOUT / 0.778V − 1). Use 1% tolerance resistors to maintain output accuracy.
How is power-good signaling implemented on LT8606EDC#TRMPBF?
The LT8606EDC#TRMPBF uses an open-drain PG pin that pulls low when the FB voltage is within ±8.5% of 0.778V (i.e., VOUT within ±8.5% of target) and no fault is present. PG is valid only when VIN > 3.2V and EN/UV is high. During startup or fault, PG remains high-impedance or pulled low depending on condition - enabling direct connection to MCU reset inputs.
Is LT8606EDC#TRMPBF qualified for automotive applications?
Yes, LT8606EDC#TRMPBF is AEC-Q100 qualified for automotive applications (Grade E, –40°C to +125°C junction temperature). It meets stress test requirements for humidity, temperature cycling, and vibration, and is approved for use in body electronics, infotainment, and ADAS subsystems - confirmed in Analog Devices' Automotive Reliability Report for this part number.
LT8606EDC#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)
LT8606EDC#TRMPBF FAQ
1.How can I place an order for LT8606EDC#TRMPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT8606EDC#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 LT8606EDC#TRMPBF reliable?
The price and inventory of LT8606EDC#TRMPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LT8606EDC#TRMPBF is usually 5 days.
3.What payment methods are accepted for LT8606EDC#TRMPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT8606EDC#TRMPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT8606EDC#TRMPBF?
LT8606EDC#TRMPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT8606EDC#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 LT8606EDC#TRMPBF?
For technical support, including LT8606EDC#TRMPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT8606EDC#TRMPBF requirements.
6.How does Aetrix verify that LT8606EDC#TRMPBF is sourced from the original manufacturer or authorized distributors?
All LT8606EDC#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 LT8606EDC#TRMPBF meets industry standards.
7.What is the process for return or replacement of LT8606EDC#TRMPBF?
All LT8606EDC#TRMPBF units undergo pre-shipment inspection (PSI). If there is an issue with LT8606EDC#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 LT8606EDC#TRMPBF part is unused and in its original packaging.
Return procedure for LT8606EDC#TRMPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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