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Analog Devices Inc. LT8606EMSE#PBF
- Part No.:
- LT8606EMSE#PBF
- Manufacturer:
- Analog Devices Inc.
- Package:
- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width) Exposed Pad
- Datasheet:
-
LT8606EMSE#PBF.pdf
- Description:
- IC REG BUCK ADJ 350MA 10MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,676
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Product details
Overview
LT8606EMSE#PBF from Analog Devices is a 42V, 350mA synchronous step-down regulator with 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 systems requiring ultralow IQ and low EMI. The device operates from 3.0V to 42V input and supports 200kHz–2.2MHz switching via RT resistor.
For engineers reviewing the LT8606EMSE#PBF datasheet, LT8606EMSE#PBF pinout, LT8606EMSE#PBF application, or LT8606EMSE#PBF equivalent, key selection criteria include its 35ns minimum on-time, ±8.5% power-good accuracy, 10-lead MSOP thermal performance (θJA = 40°C/W), and Burst Mode™ operation enabling <3µA IQ at 12VIN→3.3VOUT regulation.
Technical Context
The LT8606EMSE#PBF implements constant-frequency peak current mode control with internal 0.778V reference and slope compensation. Its 35ns minimum on-time enables high VIN/VOUT ratios (e.g., 42V→3.3V) without pulse-skipping instability, while frequency foldback during startup prevents inductor current runaway when VOUT is below regulation.
It integrates dual NMOS power switches (375mΩ top, 240mΩ bottom), a 3.5V INTVCC regulator, and programmable soft-start/tracking via TR/SS. The SYNC pin (MSOP only) allows external clock synchronization, spread-spectrum modulation, or mode selection between Burst Mode and pulse-skipping - critical for CISPR25 Class 5 radiated EMI compliance.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 3.0V to 42V - supports wide automotive battery transients and industrial 24/36V rails. |
| Quiescent Current (Burst Mode) | 1.7µA non-switching - enables >10-year battery life in always-on IoT sensors. |
| Max Continuous Output Current | 350mA - sufficient for powering microcontrollers, CAN transceivers, and analog front-ends. |
| Switching Frequency Range | 200kHz to 2.2MHz - adjustable via RT resistor; higher frequencies allow smaller 2mm×2mm inductors. |
| Min On-Time / Off-Time | 35ns / 93ns - enables high step-down ratios (e.g., 42V→3.3V at 2MHz) without duty-cycle limitation. |
| Power-Good Accuracy | ±8.5% of VFB - provides reliable system reset signaling with tight tolerance over temperature. |
| Enable Threshold | 1.05V rising, 1.00V falling - precise undervoltage lockout for controlled system startup. |
Pinout & Package
LT8606EMSE#PBF uses a thermally enhanced 10-lead MSOP package (θJA = 40°C/W); exposed pad (Pin 11) must be soldered to PCB ground for thermal and electrical integrity.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| BST | Bootstrap supply | Drives top MOSFET gate above VIN; requires 0.1µF ceramic capacitor directly to SW. |
| 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 output | Bypass with ≥1µF low-ESR ceramic; powers internal logic and drivers; not for external loads. |
| RT | Frequency programming | Resistor to GND sets fSW from 200kHz–2.2MHz; determines inductor size and efficiency trade-off. |
| SYNC | Mode control & sync input | Ground = Burst Mode; float = pulse-skipping; 3.2–5V = spread-spectrum; absent on DFN variants. |
| EN/UV | Enable & UVLO input | 1.05V threshold enables regulation; external divider programs custom VIN shutdown point. |
| PG | Open-drain power-good | Pulled low when VOUT is within ±8.5% of target; valid only when VIN > 3.2V and EN/UV high. |
| TR/SS | Soft-start & tracking | 2µA internal current source charges external cap for controlled VOUT ramp; enables output voltage sequencing. |
| FB | Feedback input | Regulated to 0.778V; resistor divider sets output voltage; 1% resistors recommended for accuracy. |
| GND | Power & signal ground | Exposed pad (Pin 11) is GND - must be soldered to large PCB copper area for thermal management. |
Key Features
| Feature | Design Value |
|---|---|
| Ultralow IQ Burst Mode | 1.7µA non-switching current enables >10-year battery life in always-on applications like telematics modules. |
| Low EMI Spread Spectrum | SYNC pin enables 0.5–6kHz frequency modulation - reduces peak radiated emissions by >10dB per CISPR25 testing. |
| Fast Transient Response | Peak current mode + internal compensation achieves <10µs recovery from 50–350mA load steps with minimal overshoot. |
| High VIN Capability | 42V absolute max rating and 35ns min on-time support direct connection to 36V industrial rails and cold-crank automotive inputs. |
| Thermal Robustness | MSOP package with exposed pad achieves θJA = 40°C/W - sustains 350mA continuous output at 85°C ambient with minimal derating. |
Applications
| Automotive Body Control Module (BCM) | Industrial Sensor Node Power |
|---|---|
Use Scenario: Powering CAN FD transceivers, LIN controllers, and EEPROMs in door modules under 12V battery with cold-crank (4.5V–42V). IC Role / Device Role / Timing Role: Primary 3.3V/5V buck converter delivering regulated output with <3µA IQ during sleep mode. Use Value: Enables BCM to meet ISO 16750-2 quiescent current requirements (<50µA total) while maintaining fast wake-up response. | Use Scenario: Supplying ultra-low-power MCU, MEMS accelerometer, and LoRaWAN radio in remote condition-monitoring nodes powered by LiSOCl₂ batteries. IC Role / Device Role / Timing Role: Main system regulator operating in Burst Mode to minimize no-load consumption. Use Value: Extends 2.5Ah battery life to >12 years at 10-second wake-up intervals with 350mA peak transmit current. |
| Medical Portable Diagnostic Device | Avionics Cabin Interface Unit |
Use Scenario: Generating clean 5V rail for ADCs, op-amps, and touch-screen controllers in handheld ultrasound units with strict EMI limits. IC Role / Device Role / Timing Role: Low-noise, spread-spectrum synchronized buck converter feeding analog signal chain. Use Value: Meets IEC 60601-1 EMI Class B limits without added filtering, reducing BOM cost and board area. | Use Scenario: Providing 3.3V power to ARINC 429 line receivers and FPGA configuration memory in cabin entertainment systems. IC Role / Device Role / Timing Role: High-reliability DC/DC converter qualified to AEC-Q100 Grade 1 (–40°C to 125°C junction). Use Value: Eliminates need for external thermal derating or heatsinking in convection-cooled avionics enclosures. |
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 |
|---|---|---|---|
| LT8607EMSE#PBF | Same pinout, 500mA output, 1.2µA IQ, identical features including SYNC/TR/SS/PG. | Higher output current required; same PCB layout usable with minor inductor/capacitor upgrade. | Select when >350mA load margin or lower IQ is needed without redesign. |
| MP2451DT-LF-Z | 36V max input, 600mA output, 2.5µA IQ, no SYNC/TR/SS/PG pins, SOIC-8 package. | Lacks power-good, soft-start, and synchronization - suitable only for basic fixed-output applications. | Choose for cost-sensitive, non-critical systems where feature set and thermal performance are secondary. |
Compared with LT8607EMSE#PBF, the LT8606EMSE#PBF offers tighter thermal design margin in MSOP due to lower current, while MP2451DT-LF-Z sacrifices monitoring and control features for lower unit cost and simpler layout - making it viable only where Burst Mode, PG signaling, and sequencing are unnecessary.
Availability
LT8606EMSE#PBF is available at Aetrix Electronics and suitable for automotive body control modules, industrial sensor nodes, portable medical diagnostics, and avionics cabin interface units requiring stable component supply, AEC-Q100 qualification, and long-term production continuity.
Supply support for LT8606EMSE#PBF 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, communications, and industrial markets since 1965.
The LT8606 series belongs to Analog Devices' Power by Linear™ portfolio, designed specifically for high-efficiency, low-EMI, ultralow-quiescent-current DC/DC conversion in automotive, industrial, and medical applications where reliability and regulatory compliance are critical.
FAQ
What is the maximum input voltage rating for the LT8606EMSE#PBF?
The LT8606EMSE#PBF has an absolute maximum input voltage rating of 42V on the VIN and EN/UV pins. It is designed to operate continuously across 3.0V to 42V input range, supporting automotive cold-crank and industrial 36V rail applications. Exceeding 42V may cause permanent damage, and operation above this limit is not guaranteed even momentarily.
Does the LT8606EMSE#PBF support external frequency synchronization?
Yes, the LT8606EMSE#PBF supports external frequency synchronization via its dedicated SYNC pin (Pin 5 in MSOP). When driven with a TTL/CMOS clock signal between 200kHz and 2.2MHz, the device synchronizes its switching edges and operates in pulse-skipping mode. This capability is exclusive to the MSOP package - DFN variants lack the SYNC pin.
How does the LT8606EMSE#PBF achieve ultralow quiescent current in light-load conditions?
The LT8606EMSE#PBF achieves 1.7µA non-switching quiescent current by entering Burst Mode™ operation: it delivers discrete energy bursts to the output capacitor, then shuts down all switching and control circuitry during sleep periods. In a typical 12VIN→3.3VOUT application, total input current drops to ~3.0µA at zero load - enabling multi-year battery life in always-on systems.
What is the function of the TR/SS pin on the LT8606EMSE#PBF?
The TR/SS (Track/Soft-Start) pin on the LT8606EMSE#PBF provides user-programmable output voltage ramp rate during startup and enables output voltage tracking. An internal 2µA current source charges an external capacitor connected to TR/SS, controlling slew rate. When TR/SS voltage is below 0.778V, the FB pin is regulated to match TR/SS - allowing precise sequencing with other rails.
Is the LT8606EMSE#PBF qualified for automotive applications?
Yes, the LT8606EMSE#PBF is AEC-Q100 qualified for automotive applications (Grade 1: –40°C to 125°C junction temperature). It meets stress test requirements for temperature cycling, humidity, and mechanical shock. The "E" grade designation and #PBF suffix confirm its automotive qualification status and lead-free finish - suitable for body electronics, infotainment, and ADAS subsystems.
LT8606EMSE#PBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width) Exposed Pad
- Packaging:
- Tube
- 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:
- 10-MSOP-EP
LT8606EMSE#PBF FAQ
1.How can I place an order for LT8606EMSE#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT8606EMSE#PBF 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 LT8606EMSE#PBF reliable?
The price and inventory of LT8606EMSE#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LT8606EMSE#PBF is usually 5 days.
3.What payment methods are accepted for LT8606EMSE#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT8606EMSE#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT8606EMSE#PBF?
LT8606EMSE#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT8606EMSE#PBF 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 LT8606EMSE#PBF?
For technical support, including LT8606EMSE#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT8606EMSE#PBF requirements.
6.How does Aetrix verify that LT8606EMSE#PBF is sourced from the original manufacturer or authorized distributors?
All LT8606EMSE#PBF 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 LT8606EMSE#PBF meets industry standards.
7.What is the process for return or replacement of LT8606EMSE#PBF?
All LT8606EMSE#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LT8606EMSE#PBF, 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 LT8606EMSE#PBF part is unused and in its original packaging.
Return procedure for LT8606EMSE#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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