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Analog Devices Inc. LT8606HMSE#PBF
- Part No.:
- LT8606HMSE#PBF
- Manufacturer:
- Analog Devices Inc.
- Package:
- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width) Exposed Pad
- Datasheet:
-
LT8606HMSE#PBF.pdf
- Description:
- IC REG BUCK ADJ 350MA 10MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,767
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Product details
Overview
LT8606HMSE#PBF from Analog Devices is a 42V, 350mA synchronous step-down regulator in thermally enhanced 10-lead MSOP package, featuring 1.7µA non-switching quiescent current, 35ns minimum on-time, and peak current mode control with internal compensation. It delivers regulated 3.3V/5V outputs for automotive infotainment power rails, industrial sensor nodes, and always-on telematics modules.
For engineers reviewing the LT8606HMSE#PBF datasheet, LT8606HMSE#PBF pinout, LT8606HMSE#PBF application, or LT8606HMSE#PBF equivalent, key selection criteria include ultralow IQ in Burst Mode (<3µA at 12VIN→3.3VOUT), ±8.5% power-good accuracy, 200kHz–2.2MHz programmable switching frequency via RT resistor, and AEC-Q100 qualification for under-hood operation up to 150°C junction temperature.
Technical Context
The LT8606HMSE#PBF implements constant-frequency peak current mode control with internal 0.778V reference and slope compensation, enabling fast transient response and stable loop behavior using small external inductors. Its architecture integrates top/bottom NMOS switches (375mΩ/240mΩ RDS(ON)), BST boost circuitry, and a 3.5V INTVCC regulator powering internal logic and gate drivers.
Operating modes are selected via the SYNC pin: grounded for low-ripple Burst Mode (1.7µA IQ), floating for pulse-skipping, or tied to INTVCC for spread-spectrum EMI reduction. The TR/SS pin enables soft-start ramp control and output voltage tracking-functions absent in DFN variants but fully supported in this MSOP package.
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 | 1.7µA (non-switching) - enables >10-year battery life in always-on vehicle modules with 10mAh coin cells. |
| Output Current | 350mA continuous - sufficient for powering microcontrollers, CAN transceivers, and low-power DSPs. |
| Switching Frequency | 200kHz to 2.2MHz (RT-programmable) - allows optimization between inductor size (e.g., 2.2MHz → 2.2µH) and efficiency. |
| Feedback Reference | 0.778V ±12mV - high-accuracy reference enables tight output regulation (±1%) with 1% FB resistors. |
| Power Good Threshold | ±8.5% of VOUT - provides reliable system reset signaling without external comparators. |
| Min On-Time | 35ns - supports high VIN/VOUT ratios (e.g., 42V→3.3V) without pulse skipping at light loads. |
| Junction Temp Range | –40°C to +150°C - qualified per AEC-Q100 Grade H for engine control unit and ADAS camera power supplies. |
Pinout & Package
LT8606HMSE#PBF uses a thermally enhanced 10-lead MSOP package (θJA = 40°C/W) with exposed pad (Pin 11) soldered to PCB ground for thermal management and EMI reduction.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| BST | Bootstrap supply for high-side NMOS gate drive | Requires 0.1µF ceramic capacitor to SW; no series resistor allowed to maintain gate drive strength. |
| SW | Switch node connecting internal FETs and external inductor | High di/dt node; must be minimized on PCB to reduce EMI and switching losses. |
| INTVCC | Internal 3.5V regulator output | Bypass with ≥1µF low-ESR ceramic; not for external loading - powers internal logic and gate drivers. |
| RT | Resistor-based oscillator frequency programming | Connect to GND with precision resistor (e.g., 18.2kΩ sets 2MHz); sets min load for full-frequency operation. |
| SYNC | External clock synchronization input | Ground for Burst Mode; float for pulse-skipping; tie to INTVCC for spread-spectrum EMI reduction. |
| EN/UV | Enable and input undervoltage lockout | 1.05V rising threshold with 50mV hysteresis; supports programmable VIN UVLO via resistor divider. |
| PG | Open-drain power-good status indicator | Pulled low when VOUT within ±8.5% of target; valid only when VIN >3.2V and EN/UV high. |
| TR/SS | Tracking and soft-start control | 2µA internal pull-up enables capacitor-programmed slew rate; supports sequencing with other rails. |
| FB | Feedback input referenced to 0.778V | Connect resistor divider tap here; 10pF phase-lead cap recommended with high-value dividers. |
| GND | Power and signal ground (exposed pad) | Exposed pad (Pin 11) must be soldered to PCB ground plane for thermal and electrical performance. |
Key Features
| Feature | Design Value |
|---|---|
| Ultralow IQ Burst Mode | 1.7µA non-switching current enables >10-year battery life in always-on automotive modules. |
| Spread Spectrum Modulation | Reduces peak radiated EMI by >10dB in CISPR25 Class 5 tests without filter redesign. |
| Fast Minimum On-Time | 35ns enables high step-down ratios (e.g., 42V→3.3V) while maintaining PWM control down to 200kHz. |
| Internal Compensation | Eliminates external compensation network - reduces BOM count and design iteration time. |
| AEC-Q100 Grade H | Qualified for 150°C junction operation - suitable for engine bay, transmission control, and radar power supplies. |
| Low-Ripple Operation | <10mVP-P output ripple in Burst Mode - meets noise-sensitive analog sensor and RF front-end requirements. |
Applications
| Automotive Infotainment Power | Industrial Sensor Node Supply |
|---|---|
Use Scenario: Powering LCD display controllers and audio codecs in head units with cold-crank survival requirement. IC Role / Device Role / Timing Role: Primary 5V/3.3V buck converter delivering regulated output during 4.5V–42V battery transients. Use Value: 1.7µA IQ extends backup battery life; 35ns min on-time maintains regulation during 42V load dump. | Use Scenario: Providing stable 3.3V rail for wireless sensor transceivers in factory automation gateways. IC Role / Device Role / Timing Role: Always-on DC/DC converter supplying MCU, LoRaWAN radio, and analog front-end. Use Value: <10mVP-P ripple prevents ADC measurement errors; AEC-Q100 qualification ensures reliability in harsh environments. |
| ADAS Camera Module Supply | Telematics Control Unit (TCU) Core Rail |
Use Scenario: Generating clean 1.2V/1.8V core voltage for image signal processors in rear-view cameras. IC Role / Device Role / Timing Role: Secondary buck stage following pre-regulator; requires low noise and fast load transient response. Use Value: Peak current mode control achieves <5µs recovery from 50–350mA load steps; internal compensation simplifies layout. | Use Scenario: Powering ARM Cortex-A7 SoC and cellular modem in vehicle connectivity modules. IC Role / Device Role / Timing Role: High-efficiency primary buck regulator supporting 350mA peak current with thermal derating margin. Use Value: 40°C/W θJA enables operation at 150°C junction without forced air; PG pin interfaces directly to SoC reset controller. |
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 |
|---|---|---|---|
| LT8606IMSE#PBF | Same architecture and pinout, but rated for –40°C to 125°C junction temperature. | Not qualified for under-hood applications requiring >125°C operation. | Select LT8606HMSE#PBF when ambient temperatures exceed 105°C or AEC-Q100 Grade H compliance is mandatory. |
| LT8606BEDC#TRMPBF | 8-pin 2mm×2mm DFN package, no SYNC/TR/SS pins, fixed Burst Mode operation only. | Lacks frequency synchronization, soft-start control, and spread-spectrum EMI reduction. | Choose LT8606HMSE#PBF when design requires EMI mitigation, power sequencing, or external clock sync in space-constrained layouts. |
Compared with LT8606IMSE#PBF, LT8606HMSE#PBF adds 25°C higher max junction temperature and full AEC-Q100 Grade H validation; versus LT8606BEDC#TRMPBF, it retains all MSOP-specific features (SYNC, TR/SS, PG) in a thermally superior package for high-reliability automotive use.
Availability
LT8606HMSE#PBF is available at Aetrix Electronics and suitable for automotive infotainment systems, ADAS camera modules, and industrial sensor nodes requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for LT8606HMSE#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 automotive, industrial, communications, and healthcare markets.
The LT8606 product line delivers ultralow-quiescent-current synchronous buck regulators optimized for always-on automotive and battery-powered systems where efficiency at light loads and robustness across wide input ranges are critical.
FAQ
What is the maximum junction temperature rating for LT8606HMSE#PBF?
The LT8606HMSE#PBF is rated for operation from –40°C to +150°C junction temperature and is fully qualified per AEC-Q100 Grade H. This makes LT8606HMSE#PBF suitable for under-hood automotive applications such as engine control units and radar modules where ambient temperatures exceed 105°C. Thermal derating above 125°C is specified in the datasheet.
Does LT8606HMSE#PBF support external clock synchronization?
Yes, LT8606HMSE#PBF supports external clock synchronization via its dedicated SYNC pin (Pin 5). When driven with a TTL/CMOS clock signal, LT8606HMSE#PBF synchronizes its switching frequency and operates in pulse-skipping mode. This capability enables deterministic EMI reduction and eliminates beat frequencies in multi-rail systems - a feature unavailable in DFN-package variants of the LT8606.
How does the TR/SS pin function on LT8606HMSE#PBF?
The TR/SS pin on LT8606HMSE#PBF serves dual functions: soft-start control and output voltage tracking. An internal 2µA current source charges an external capacitor to program output voltage ramp rate. When driven externally, TR/SS forces the FB pin to track its voltage - enabling precise power sequencing with other rails. This functionality is exclusive to MSOP packages like LT8606HMSE#PBF and is not present in DFN variants.
What is the typical quiescent current of LT8606HMSE#PBF in Burst Mode operation?
In Burst Mode operation (SYNC pin grounded), LT8606HMSE#PBF draws 1.7µA of non-switching quiescent current and typically consumes <3µA total input current when regulating 12VIN to 3.3VOUT at zero load. This ultralow IQ enables multi-year battery life in always-on automotive modules such as telematics control units and tire pressure monitoring systems powered by LT8606HMSE#PBF.
Is LT8606HMSE#PBF pin-compatible with other LT8606 variants?
Yes, LT8606HMSE#PBF shares identical pinout and footprint with all LT8606/LT8606B MSOP variants (e.g., LT8606EMSE#PBF, LT8606IMSE#PBF, LT8606JMSE#WPBF). All 10-lead MSOP versions use the same land pattern, thermal pad connection, and signal assignments - enabling drop-in replacement across temperature grades and automotive qualification levels without PCB revision.
LT8606HMSE#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 ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 10-MSOP-EP
LT8606HMSE#PBF FAQ
1.How can I place an order for LT8606HMSE#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT8606HMSE#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 LT8606HMSE#PBF reliable?
The price and inventory of LT8606HMSE#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LT8606HMSE#PBF is usually 5 days.
3.What payment methods are accepted for LT8606HMSE#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT8606HMSE#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT8606HMSE#PBF?
LT8606HMSE#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT8606HMSE#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 LT8606HMSE#PBF?
For technical support, including LT8606HMSE#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT8606HMSE#PBF requirements.
6.How does Aetrix verify that LT8606HMSE#PBF is sourced from the original manufacturer or authorized distributors?
All LT8606HMSE#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 LT8606HMSE#PBF meets industry standards.
7.What is the process for return or replacement of LT8606HMSE#PBF?
All LT8606HMSE#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LT8606HMSE#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 LT8606HMSE#PBF part is unused and in its original packaging.
Return procedure for LT8606HMSE#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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